TY  - JOUR
AU  - Milanović, Zorana
AU  - Beletić, Anđelo
AU  - Vekić, Jelena
AU  - Zeljković, Aleksandra
AU  - Andrić, Nenad
AU  - Božović, Anja Ilić
AU  - Spariosu, Kristina
AU  - Radaković, Milena
AU  - Ajtić, Jelena
AU  - Kovačević-Filipović, Milica
PY  - 2020
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1875
AB  - Asymptomatic outdoor dogs can be carriers of Babesia canis, but data describing the development of an acute phase response (APR) are not available. We hypothesised that these dogs have a moderate APR that could be detected by hematological and biochemical changes. Two groups of Babesia-exposed dogs were represented by nine B. canis PCR-positive and twenty B. canis PCR-negative, seroreactive dogs. The control group consisted of ten Babesia-naïve dogs. Serum amyloid A (SAA), paraoxonase-1 (PON-1), complete blood count, and biochemistry parameters were analysed by standard methodologies. Protein and lipoprotein fractions were separated using agarose gel electrophoresis (GE), and the dominant diameters of lipoproteins were assessed on gradient GE. Results were evaluated using non-parametric tests and the Receiver Operating Characteristic curve. SAA (median 39.0 μg/mL, range 2.2–48.8 μg/mL), total protein (median 74.7 g/L, range 57.1–98.3 g/L) and the dominant diameter of α-lipoproteins (median 13.31 nm, range 12.09–14.17 nm) in B. canis PCR-positive dogs were higher relative to dogs in the control group or dogs that were PCR-negative but seroreactive (p < 0.001 for both groups). Mild to moderate anemia (4/29), thrombocytopenia (7/29), and leukocyte counts that were close to the upper limit of the reference range were encountered in both Babesia-exposed groups. When compared to controls, Babesia-exposed dogs displayed decreased a PON-1 activity and protein GE pattern consistent with low-grade chronic inflammation (p < 0.001 for both groups). Dogs with detectable amounts of B. canis DNA in blood contain increased levels of SAA and total protein along with α-lipoproteins that display an increased diameter relative to those dogs with positive Babesia serology but undetectable levels of B. canis DNA in blood.
PB  - Elsevier Science Bv, Amsterdam
T2  - Veterinary Parasitology
T1  - Evidence of acute phase reaction in asymptomatic dogs naturally infected with Babesia canis
VL  - 282
SP  - 109140
DO  - 10.1016/j.vetpar.2020.109140
ER  - 

@article{
author = "Milanović, Zorana and Beletić, Anđelo and Vekić, Jelena and Zeljković, Aleksandra and Andrić, Nenad and Božović, Anja Ilić and Spariosu, Kristina and Radaković, Milena and Ajtić, Jelena and Kovačević-Filipović, Milica",
year = "2020",
abstract = "Asymptomatic outdoor dogs can be carriers of Babesia canis, but data describing the development of an acute phase response (APR) are not available. We hypothesised that these dogs have a moderate APR that could be detected by hematological and biochemical changes. Two groups of Babesia-exposed dogs were represented by nine B. canis PCR-positive and twenty B. canis PCR-negative, seroreactive dogs. The control group consisted of ten Babesia-naïve dogs. Serum amyloid A (SAA), paraoxonase-1 (PON-1), complete blood count, and biochemistry parameters were analysed by standard methodologies. Protein and lipoprotein fractions were separated using agarose gel electrophoresis (GE), and the dominant diameters of lipoproteins were assessed on gradient GE. Results were evaluated using non-parametric tests and the Receiver Operating Characteristic curve. SAA (median 39.0 μg/mL, range 2.2–48.8 μg/mL), total protein (median 74.7 g/L, range 57.1–98.3 g/L) and the dominant diameter of α-lipoproteins (median 13.31 nm, range 12.09–14.17 nm) in B. canis PCR-positive dogs were higher relative to dogs in the control group or dogs that were PCR-negative but seroreactive (p < 0.001 for both groups). Mild to moderate anemia (4/29), thrombocytopenia (7/29), and leukocyte counts that were close to the upper limit of the reference range were encountered in both Babesia-exposed groups. When compared to controls, Babesia-exposed dogs displayed decreased a PON-1 activity and protein GE pattern consistent with low-grade chronic inflammation (p < 0.001 for both groups). Dogs with detectable amounts of B. canis DNA in blood contain increased levels of SAA and total protein along with α-lipoproteins that display an increased diameter relative to those dogs with positive Babesia serology but undetectable levels of B. canis DNA in blood.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Veterinary Parasitology",
title = "Evidence of acute phase reaction in asymptomatic dogs naturally infected with Babesia canis",
volume = "282",
pages = "109140",
doi = "10.1016/j.vetpar.2020.109140"
}

Milanović, Z., Beletić, A., Vekić, J., Zeljković, A., Andrić, N., Božović, A. I., Spariosu, K., Radaković, M., Ajtić, J.,& Kovačević-Filipović, M.. (2020). Evidence of acute phase reaction in asymptomatic dogs naturally infected with Babesia canis. in Veterinary Parasitology
Elsevier Science Bv, Amsterdam., 282, 109140.
https://doi.org/10.1016/j.vetpar.2020.109140

Milanović Z, Beletić A, Vekić J, Zeljković A, Andrić N, Božović AI, Spariosu K, Radaković M, Ajtić J, Kovačević-Filipović M. Evidence of acute phase reaction in asymptomatic dogs naturally infected with Babesia canis. in Veterinary Parasitology. 2020;282:109140.
doi:10.1016/j.vetpar.2020.109140 .

Milanović, Zorana, Beletić, Anđelo, Vekić, Jelena, Zeljković, Aleksandra, Andrić, Nenad, Božović, Anja Ilić, Spariosu, Kristina, Radaković, Milena, Ajtić, Jelena, Kovačević-Filipović, Milica, "Evidence of acute phase reaction in asymptomatic dogs naturally infected with Babesia canis" in Veterinary Parasitology, 282 (2020):109140,
https://doi.org/10.1016/j.vetpar.2020.109140 . .

TY  - JOUR
AU  - Mitrović, Branislava
AU  - Todorović, Dragana
AU  - Ajtić, Jelena
AU  - Vranješ, Borjana
PY  - 2020
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1794
AB  - This review paper discusses the content of natural ( 40K, 238U, 226Ra, and 232Th) and artificial (137Cs) radionuclides in the soil of the mountains of Maljen, Tara and Kopaonik in the Republic of Serbia over 2002-2015. In addition, the paper gives radiation hazard parameters, i.e., radium equivalent activity, absorbed dose rate, annual effective dose equivalent, external hazard index, annual gonadal dose equivalent, and excess lifetime cancer risk outdoors that we calculated from the obtained content of the natural radionuclides in the soil samples. We compared the parameters to previously published results for different parts of the country and looked into the radioecological status of the investigated areas.
AB  - U radu su prikazani rezultati gamaspektrometrijskog određivanja sadržaja prirodnih (40K, 238U, 226Ra i 232Th) i proizvedenog (137Cs) radionuklida u zemljištu sa područja planina Maljen, Tara i Kopaonik. Uzorci zemljišta prikupljeni su u periodu od 2002. do 2015. godine na različitim nadmorskim visinama. Na osnovu sadržaja radionuklida u zemljištu odredili smo parametre radijacionog rizika: radijum ekvivalentnu aktivnost, jačinu doze, godišnju efektivnu dozu spoljašnjeg zračenja, indeks spoljašnjeg hazarda, godišnju gonadnu dozu i faktor rizika pojave kancera na području planinskih regiona Republike Srbije, i potom ih uporedili sa ranije objavljenim rezultatima za pojedine regione Republike Srbije.
PB  - Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd
T2  - Journal of Agricultural Sciences (Belgrade)
T1  - A review: Natural and artificial radionuclides and radiation hazard parameters in the soil of mountain regions in Serbia
T1  - Prirodni i proizvedeni radionuklidi u zemljištu planinskih regiona Republike Srbije i parametri radijacionog rizika
VL  - 65
IS  - 1
SP  - 1
EP  - 18
DO  - 10.2298/JAS2001001M
ER  - 

@article{
author = "Mitrović, Branislava and Todorović, Dragana and Ajtić, Jelena and Vranješ, Borjana",
year = "2020",
abstract = "This review paper discusses the content of natural ( 40K, 238U, 226Ra, and 232Th) and artificial (137Cs) radionuclides in the soil of the mountains of Maljen, Tara and Kopaonik in the Republic of Serbia over 2002-2015. In addition, the paper gives radiation hazard parameters, i.e., radium equivalent activity, absorbed dose rate, annual effective dose equivalent, external hazard index, annual gonadal dose equivalent, and excess lifetime cancer risk outdoors that we calculated from the obtained content of the natural radionuclides in the soil samples. We compared the parameters to previously published results for different parts of the country and looked into the radioecological status of the investigated areas., U radu su prikazani rezultati gamaspektrometrijskog određivanja sadržaja prirodnih (40K, 238U, 226Ra i 232Th) i proizvedenog (137Cs) radionuklida u zemljištu sa područja planina Maljen, Tara i Kopaonik. Uzorci zemljišta prikupljeni su u periodu od 2002. do 2015. godine na različitim nadmorskim visinama. Na osnovu sadržaja radionuklida u zemljištu odredili smo parametre radijacionog rizika: radijum ekvivalentnu aktivnost, jačinu doze, godišnju efektivnu dozu spoljašnjeg zračenja, indeks spoljašnjeg hazarda, godišnju gonadnu dozu i faktor rizika pojave kancera na području planinskih regiona Republike Srbije, i potom ih uporedili sa ranije objavljenim rezultatima za pojedine regione Republike Srbije.",
publisher = "Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd",
journal = "Journal of Agricultural Sciences (Belgrade)",
title = "A review: Natural and artificial radionuclides and radiation hazard parameters in the soil of mountain regions in Serbia, Prirodni i proizvedeni radionuklidi u zemljištu planinskih regiona Republike Srbije i parametri radijacionog rizika",
volume = "65",
number = "1",
pages = "1-18",
doi = "10.2298/JAS2001001M"
}

Mitrović, B., Todorović, D., Ajtić, J.,& Vranješ, B.. (2020). A review: Natural and artificial radionuclides and radiation hazard parameters in the soil of mountain regions in Serbia. in Journal of Agricultural Sciences (Belgrade)
Univerzitet u Beogradu - Poljoprivredni fakultet, Beograd., 65(1), 1-18.
https://doi.org/10.2298/JAS2001001M

Mitrović B, Todorović D, Ajtić J, Vranješ B. A review: Natural and artificial radionuclides and radiation hazard parameters in the soil of mountain regions in Serbia. in Journal of Agricultural Sciences (Belgrade). 2020;65(1):1-18.
doi:10.2298/JAS2001001M .

Mitrović, Branislava, Todorović, Dragana, Ajtić, Jelena, Vranješ, Borjana, "A review: Natural and artificial radionuclides and radiation hazard parameters in the soil of mountain regions in Serbia" in Journal of Agricultural Sciences (Belgrade), 65, no. 1 (2020):1-18,
https://doi.org/10.2298/JAS2001001M . .

TY  - JOUR
AU  - Mitrović, Branislava
AU  - Vitorović, O.
AU  - Ajtić, Jelena
AU  - Vranješ, Borjana
PY  - 2020
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1970
AB  - This paper provides activity concentrations of40K,238U,226Ra,232Th, and137Cs in samples of cultivated soil, hay, cow milk, cheese, mushrooms, and mosses collected at Mt. Maljen, Serbia, during 2018 and 2019. The average contents of40K (435 ± 33 Bq/kg),238U (42 ± 5 Bq/kg),226Ra (42 ± 4 Bq/kg) and232Th (47 ± 4 Bq/kg) in the soil are slightly higher than the global means. Radiation hazard index is less than one.137Cs is detected in soil (3.1 – 111 Bq/kg), hay (4.6 – 9.4 Bq/kg), cow milk (2.0 ± 0.2 Bq/kg), cheese (1.7 ± 0.2 Bq/kg), mushrooms (26 ± 2 Bq/kg), and mosses (21 ± 2 Bq/kg). Investigated dairy products are safe for consumption.
PB  - Editura Academiei Romane
T2  - Romanian Reports in Physics
T1  - Radioactivity in the environment and food chain at mt. Maljen, Serbia
VL  - 72
IS  - 4
SP  - 1
EP  - 11
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_1970
ER  - 

@article{
author = "Mitrović, Branislava and Vitorović, O. and Ajtić, Jelena and Vranješ, Borjana",
year = "2020",
abstract = "This paper provides activity concentrations of40K,238U,226Ra,232Th, and137Cs in samples of cultivated soil, hay, cow milk, cheese, mushrooms, and mosses collected at Mt. Maljen, Serbia, during 2018 and 2019. The average contents of40K (435 ± 33 Bq/kg),238U (42 ± 5 Bq/kg),226Ra (42 ± 4 Bq/kg) and232Th (47 ± 4 Bq/kg) in the soil are slightly higher than the global means. Radiation hazard index is less than one.137Cs is detected in soil (3.1 – 111 Bq/kg), hay (4.6 – 9.4 Bq/kg), cow milk (2.0 ± 0.2 Bq/kg), cheese (1.7 ± 0.2 Bq/kg), mushrooms (26 ± 2 Bq/kg), and mosses (21 ± 2 Bq/kg). Investigated dairy products are safe for consumption.",
publisher = "Editura Academiei Romane",
journal = "Romanian Reports in Physics",
title = "Radioactivity in the environment and food chain at mt. Maljen, Serbia",
volume = "72",
number = "4",
pages = "1-11",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_1970"
}

Mitrović, B., Vitorović, O., Ajtić, J.,& Vranješ, B.. (2020). Radioactivity in the environment and food chain at mt. Maljen, Serbia. in Romanian Reports in Physics
Editura Academiei Romane., 72(4), 1-11.
https://hdl.handle.net/21.15107/rcub_veterinar_1970

Mitrović B, Vitorović O, Ajtić J, Vranješ B. Radioactivity in the environment and food chain at mt. Maljen, Serbia. in Romanian Reports in Physics. 2020;72(4):1-11.
https://hdl.handle.net/21.15107/rcub_veterinar_1970 .

Mitrović, Branislava, Vitorović, O., Ajtić, Jelena, Vranješ, Borjana, "Radioactivity in the environment and food chain at mt. Maljen, Serbia" in Romanian Reports in Physics, 72, no. 4 (2020):1-11,
https://hdl.handle.net/21.15107/rcub_veterinar_1970 .

TY  - JOUR
AU  - Janjić, Filip
AU  - Sarvan, Darko
AU  - Tomanović, Snežana
AU  - Cuk, Jelena
AU  - Krstić, Vanja
AU  - Radonjić, Vladimir
AU  - Kovačević-Filipović, Milica
AU  - Ajtić, Jelena
PY  - 2019
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1783
AB  - Belgrade, the capital of the Republic of Serbia, is an endemic location for canine babesiosis caused by Babesia canis. This tick-borne disease occurs seasonally in regions with moderate continental climate. However, recent clinical data show that 1) some cases of canine babesiosis have been recorded during the winter, and 2) canine babesiosis is spreading to the northern parts of Europe with a colder climate, which is a region previously free of this disease. Our study investigates the occurrence of canine babesiosis in different seasons over 2013-2016, and explores a short-term link between meteorological parameters and number of diagnosed cases of canine babesiosis in Belgrade. It also looks into possible long-term correlations that span one year before the onset of the disease. Based on 872 recorded cases over four years, our results show a bimodal seasonal distribution of canine babesiosis, with a pronounced peak in the spring, and a less conspicuous one in the autumn. Throughout the year, even over the coldest and warmest periods, there is a broad range of temperatures and relative humidifies when the disease is recorded. Over one year prior to the spring and autumn onset of the disease, we found a noticeable impact of temperature and relative humidity, and to a lesser extent, of atmospheric pressure and cloud cover, on the number of diagnosed cases. These findings imply short-term and long-term relationships between occurrence of acute canine babesiosis and certain meteorological parameters, and they open further questions that need to be investigated in order to understand the epidemiology of this disease.
PB  - Elsevier Gmbh, Munich
T2  - Ticks and Tick-Borne Diseases
T1  - A short-term and long-term relationship between occurrence of acute canine babesiosis and meteorological parameters in Belgrade, Serbia
VL  - 10
IS  - 6
SP  - UNSP 101273
DO  - 10.1016/j.ttbdis.2019.101273
ER  - 

@article{
author = "Janjić, Filip and Sarvan, Darko and Tomanović, Snežana and Cuk, Jelena and Krstić, Vanja and Radonjić, Vladimir and Kovačević-Filipović, Milica and Ajtić, Jelena",
year = "2019",
abstract = "Belgrade, the capital of the Republic of Serbia, is an endemic location for canine babesiosis caused by Babesia canis. This tick-borne disease occurs seasonally in regions with moderate continental climate. However, recent clinical data show that 1) some cases of canine babesiosis have been recorded during the winter, and 2) canine babesiosis is spreading to the northern parts of Europe with a colder climate, which is a region previously free of this disease. Our study investigates the occurrence of canine babesiosis in different seasons over 2013-2016, and explores a short-term link between meteorological parameters and number of diagnosed cases of canine babesiosis in Belgrade. It also looks into possible long-term correlations that span one year before the onset of the disease. Based on 872 recorded cases over four years, our results show a bimodal seasonal distribution of canine babesiosis, with a pronounced peak in the spring, and a less conspicuous one in the autumn. Throughout the year, even over the coldest and warmest periods, there is a broad range of temperatures and relative humidifies when the disease is recorded. Over one year prior to the spring and autumn onset of the disease, we found a noticeable impact of temperature and relative humidity, and to a lesser extent, of atmospheric pressure and cloud cover, on the number of diagnosed cases. These findings imply short-term and long-term relationships between occurrence of acute canine babesiosis and certain meteorological parameters, and they open further questions that need to be investigated in order to understand the epidemiology of this disease.",
publisher = "Elsevier Gmbh, Munich",
journal = "Ticks and Tick-Borne Diseases",
title = "A short-term and long-term relationship between occurrence of acute canine babesiosis and meteorological parameters in Belgrade, Serbia",
volume = "10",
number = "6",
pages = "UNSP 101273",
doi = "10.1016/j.ttbdis.2019.101273"
}

Janjić, F., Sarvan, D., Tomanović, S., Cuk, J., Krstić, V., Radonjić, V., Kovačević-Filipović, M.,& Ajtić, J.. (2019). A short-term and long-term relationship between occurrence of acute canine babesiosis and meteorological parameters in Belgrade, Serbia. in Ticks and Tick-Borne Diseases
Elsevier Gmbh, Munich., 10(6), UNSP 101273.
https://doi.org/10.1016/j.ttbdis.2019.101273

Janjić F, Sarvan D, Tomanović S, Cuk J, Krstić V, Radonjić V, Kovačević-Filipović M, Ajtić J. A short-term and long-term relationship between occurrence of acute canine babesiosis and meteorological parameters in Belgrade, Serbia. in Ticks and Tick-Borne Diseases. 2019;10(6):UNSP 101273.
doi:10.1016/j.ttbdis.2019.101273 .

Janjić, Filip, Sarvan, Darko, Tomanović, Snežana, Cuk, Jelena, Krstić, Vanja, Radonjić, Vladimir, Kovačević-Filipović, Milica, Ajtić, Jelena, "A short-term and long-term relationship between occurrence of acute canine babesiosis and meteorological parameters in Belgrade, Serbia" in Ticks and Tick-Borne Diseases, 10, no. 6 (2019):UNSP 101273,
https://doi.org/10.1016/j.ttbdis.2019.101273 . .

TY  - CONF
AU  - Mitrović, Branislava
AU  - Ajtić, Jelena
AU  - Grdović, Svetlana
AU  - Vranješ, Borjana
PY  - 2019
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2373
AB  - Mahovine spadaju u grupu bioindikatorskih organizama, jer apsorbuju radionuklide iz padavina i suve depozicije. Kao dobri pokazatelji radioaktivnog zagaĎenja, u ovom radu mahovine su iskorišćene da se odredi sadrţaj prirodnih radionuklida 40K, 238U, 226Ra, i 232Th, kao i proizvedenog 137Cs, na području četiri prigradske opštine grada Beograda: Palilula, Zemun, Rakovica i Lazarevac. Uzorci mahovina sa drveća sakupljeni su tokom proleća i jeseni 2010. godine. Posle sušenja i usitnjavanja, uzorci su mereni na niskofonskom High Purity Germanium detektoru relativne efikasnosti 30,3%. Izmerene specifične aktivnosti radionuklida su: 155-270 Bq/kg za 40K, MDA-38 Bq/kg za 238U, 5,8-41 Bq/kg za 226Ra, 5,4-25 Bq/kg za 232Th i 18-166 Bq/kg za 137Cs. IzmeĎu ispitivanih lokacija postoje razlike u sadrţaju radionuklida u mahovinama. Na primer, najveći sadrţaj prirodnih radionuklida 238U, 226 Ra i 232Th detektovan je u mahovinama na lokalitetu Zemun, a najmanji na području Palilule, dok je najveći sadrţaj antropogenog radionuklida 137Cs detektovan na području opštine Lazarevac (160 Bq/kg), a najniţi na teritoriji opštine Palilula (21 Bq/kg).
AB  - Mosses are biondicators of environmental pollution because they absorb radionuclides from precipitation and dry deposition. In this paper, the ability of mosses to absorb and accumulate radionuclides is used to determine the content of naturally occurring 40K,238U, 226Ra and 232Th, and an artificial 137Cs, in the suburban areas of Belgrade city: themunicipalities of Palilula, Zemun, Rakovica and Lazarevac. Samples of moss were collected from trees during the spring and autumn 2010. After drying and milling, the samples were measured at a low-level HPGe detector, relative efficiency of 30.3%. The measured specific activities are: 155-270 Bq/kg for 40K, MDA-38 Bq/kg for 238U, 5.8-41 Bq/kg for 226Ra, 5.4-25 Bq/kg for 232Th and 18-166 Bq/kg for 137Cs. The obtained results show differences in the content of radionuclides in mosses across the investigated sites. For example, the highest content of naturally occurring 238U, 226Raand 232Th is detected in mosses in Zemun, and the lowest in Palilula, while the highestcontent of the anthropogenic 137Cs is detected in the municipality of Lazarevac (160 Bq/kg), and the lowest in the municipality of Palilula (21 Bq/kg).
PB  - Institut za nuklearne nauke „Vinča"
C3  - Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija
T1  - Sadržaj radionuklida u mahovinama na području prigradskih opština grada Beograda
T1  - Content of radionuclides in mosses in the suburban areas of Belgrade city
SP  - 53
EP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2373
ER  - 

@conference{
author = "Mitrović, Branislava and Ajtić, Jelena and Grdović, Svetlana and Vranješ, Borjana",
year = "2019",
abstract = "Mahovine spadaju u grupu bioindikatorskih organizama, jer apsorbuju radionuklide iz padavina i suve depozicije. Kao dobri pokazatelji radioaktivnog zagaĎenja, u ovom radu mahovine su iskorišćene da se odredi sadrţaj prirodnih radionuklida 40K, 238U, 226Ra, i 232Th, kao i proizvedenog 137Cs, na području četiri prigradske opštine grada Beograda: Palilula, Zemun, Rakovica i Lazarevac. Uzorci mahovina sa drveća sakupljeni su tokom proleća i jeseni 2010. godine. Posle sušenja i usitnjavanja, uzorci su mereni na niskofonskom High Purity Germanium detektoru relativne efikasnosti 30,3%. Izmerene specifične aktivnosti radionuklida su: 155-270 Bq/kg za 40K, MDA-38 Bq/kg za 238U, 5,8-41 Bq/kg za 226Ra, 5,4-25 Bq/kg za 232Th i 18-166 Bq/kg za 137Cs. IzmeĎu ispitivanih lokacija postoje razlike u sadrţaju radionuklida u mahovinama. Na primer, najveći sadrţaj prirodnih radionuklida 238U, 226 Ra i 232Th detektovan je u mahovinama na lokalitetu Zemun, a najmanji na području Palilule, dok je najveći sadrţaj antropogenog radionuklida 137Cs detektovan na području opštine Lazarevac (160 Bq/kg), a najniţi na teritoriji opštine Palilula (21 Bq/kg)., Mosses are biondicators of environmental pollution because they absorb radionuclides from precipitation and dry deposition. In this paper, the ability of mosses to absorb and accumulate radionuclides is used to determine the content of naturally occurring 40K,238U, 226Ra and 232Th, and an artificial 137Cs, in the suburban areas of Belgrade city: themunicipalities of Palilula, Zemun, Rakovica and Lazarevac. Samples of moss were collected from trees during the spring and autumn 2010. After drying and milling, the samples were measured at a low-level HPGe detector, relative efficiency of 30.3%. The measured specific activities are: 155-270 Bq/kg for 40K, MDA-38 Bq/kg for 238U, 5.8-41 Bq/kg for 226Ra, 5.4-25 Bq/kg for 232Th and 18-166 Bq/kg for 137Cs. The obtained results show differences in the content of radionuclides in mosses across the investigated sites. For example, the highest content of naturally occurring 238U, 226Raand 232Th is detected in mosses in Zemun, and the lowest in Palilula, while the highestcontent of the anthropogenic 137Cs is detected in the municipality of Lazarevac (160 Bq/kg), and the lowest in the municipality of Palilula (21 Bq/kg).",
publisher = "Institut za nuklearne nauke „Vinča"",
journal = "Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija",
title = "Sadržaj radionuklida u mahovinama na području prigradskih opština grada Beograda, Content of radionuclides in mosses in the suburban areas of Belgrade city",
pages = "53-57",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2373"
}

Mitrović, B., Ajtić, J., Grdović, S.,& Vranješ, B.. (2019). Sadržaj radionuklida u mahovinama na području prigradskih opština grada Beograda. in Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija
Institut za nuklearne nauke „Vinča"., 53-57.
https://hdl.handle.net/21.15107/rcub_veterinar_2373

Mitrović B, Ajtić J, Grdović S, Vranješ B. Sadržaj radionuklida u mahovinama na području prigradskih opština grada Beograda. in Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija. 2019;:53-57.
https://hdl.handle.net/21.15107/rcub_veterinar_2373 .

Mitrović, Branislava, Ajtić, Jelena, Grdović, Svetlana, Vranješ, Borjana, "Sadržaj radionuklida u mahovinama na području prigradskih opština grada Beograda" in Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija (2019):53-57,
https://hdl.handle.net/21.15107/rcub_veterinar_2373 .

TY  - JOUR
AU  - Bianchi, Stefano
AU  - Plastino, Wolfango
AU  - Brattich, Erika
AU  - Đurđević, Vladimir
AU  - Longo, Alessandro
AU  - Hernandez-Ceballos, Miguel A.
AU  - Sarvan, Darko
AU  - Ajtić, Jelena
PY  - 2019
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1745
AB  - The activity concentrations of beryllium-7, a natural radiotracer that is considered as a tracer of the strato-spheric-tropospheric exchange, shows a distinct behaviour in Northern Europe compared to the central and southern parts of the continent. In this study, we use the measurements collected at four sampling stations in Scandinavia (Ivalo, Umea, Kista, Risoe) between 2001 and 2010 and investigate their trends, periodicities and residuals with the aim to further understand the common features in the beryllium-7 data records in northern sampling sites. The beryllium-7 activity concentrations exhibit statistically significant positive trends that range from an average value of 1.50%/year to an average value of 2.96%/year. We detect a one-year periodicity in all the sites, and in the southernmost site, Risoe in Denmark, additional higher-frequency harmonics. In the residual time series, we find outliers that represent occurrences of extremely high beryllium-7 activity concentration. Cross-correlations of the beryllium-7 residuals across the four sites decrease with increasing distance; similarly, as indicated by local Hurst exponents the records exhibit long-range correlations that weaken towards the end of the investigated period. To investigate the causes of the detected trends, we also calculate correlations between beryllium-7 and factors related to its production, transport and removal from the atmosphere: in particular, cross-correlations of the beryllium-7 residuals with residuals in sunspot number, local temperature, atmospheric pressure and precipitation, as well as Arctic Oscillation index and North Atlantic Oscillation index. Most of the obtained correlations, however, are not statistically significant, highlighting the need to analyse a longer time period in order to evaluate the impact of different factors on the airborne beryllium-7 activity concentration.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Applied Radiation and Isotopes
T1  - Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe
VL  - 148
SP  - 160
EP  - 167
DO  - 10.1016/j.apradiso.2019.03.038
ER  - 

@article{
author = "Bianchi, Stefano and Plastino, Wolfango and Brattich, Erika and Đurđević, Vladimir and Longo, Alessandro and Hernandez-Ceballos, Miguel A. and Sarvan, Darko and Ajtić, Jelena",
year = "2019",
abstract = "The activity concentrations of beryllium-7, a natural radiotracer that is considered as a tracer of the strato-spheric-tropospheric exchange, shows a distinct behaviour in Northern Europe compared to the central and southern parts of the continent. In this study, we use the measurements collected at four sampling stations in Scandinavia (Ivalo, Umea, Kista, Risoe) between 2001 and 2010 and investigate their trends, periodicities and residuals with the aim to further understand the common features in the beryllium-7 data records in northern sampling sites. The beryllium-7 activity concentrations exhibit statistically significant positive trends that range from an average value of 1.50%/year to an average value of 2.96%/year. We detect a one-year periodicity in all the sites, and in the southernmost site, Risoe in Denmark, additional higher-frequency harmonics. In the residual time series, we find outliers that represent occurrences of extremely high beryllium-7 activity concentration. Cross-correlations of the beryllium-7 residuals across the four sites decrease with increasing distance; similarly, as indicated by local Hurst exponents the records exhibit long-range correlations that weaken towards the end of the investigated period. To investigate the causes of the detected trends, we also calculate correlations between beryllium-7 and factors related to its production, transport and removal from the atmosphere: in particular, cross-correlations of the beryllium-7 residuals with residuals in sunspot number, local temperature, atmospheric pressure and precipitation, as well as Arctic Oscillation index and North Atlantic Oscillation index. Most of the obtained correlations, however, are not statistically significant, highlighting the need to analyse a longer time period in order to evaluate the impact of different factors on the airborne beryllium-7 activity concentration.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Applied Radiation and Isotopes",
title = "Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe",
volume = "148",
pages = "160-167",
doi = "10.1016/j.apradiso.2019.03.038"
}

Bianchi, S., Plastino, W., Brattich, E., Đurđević, V., Longo, A., Hernandez-Ceballos, M. A., Sarvan, D.,& Ajtić, J.. (2019). Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe. in Applied Radiation and Isotopes
Pergamon-Elsevier Science Ltd, Oxford., 148, 160-167.
https://doi.org/10.1016/j.apradiso.2019.03.038

Bianchi S, Plastino W, Brattich E, Đurđević V, Longo A, Hernandez-Ceballos MA, Sarvan D, Ajtić J. Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe. in Applied Radiation and Isotopes. 2019;148:160-167.
doi:10.1016/j.apradiso.2019.03.038 .

Bianchi, Stefano, Plastino, Wolfango, Brattich, Erika, Đurđević, Vladimir, Longo, Alessandro, Hernandez-Ceballos, Miguel A., Sarvan, Darko, Ajtić, Jelena, "Analysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europe" in Applied Radiation and Isotopes, 148 (2019):160-167,
https://doi.org/10.1016/j.apradiso.2019.03.038 . .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Brattich, Erika
AU  - Hernández-Ceballos, Miguel Angel
AU  - Djurdjević, Vladimir
PY  - 2019
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2372
AB  - MeĎu najbitnije faktore koji utiču na specifičnu aktivnost berilijuma-7 u prizemnom
sloju atmosfere spadaju temperatura i količina padavina. U ovom radu stoga
razmatramo njihove vremenske trendove izmeĎu 2000. i 2014. godine, na šest lokacija u
Evropi: Madrid i Bilbao (Španija) na jugu; Beč (Austrija) i Luksemburg (Luksemburg)
u centralnoj oblasti; kao i Riso (Danska) i Ivalo (Finska) na severu kontinenta. Podaci
za specifičnu aktivnost berilijuma-7 preuzeti su iz Radioactivity Environmental
Monitoring data bank (REMdb), a podaci za lokalnu temperaturu i količinu padavina iz
E-OBS gridovane klimatologije (verzija 15) i potom bilinearnom interpolacijom
ekstrahovani na šest lokacija uzorkovanja berilijuma-7. Za dobijanje trendova koristili
smo sezonski Kendalov test, u kome se za svaki mesec tokom godine prvo primeni
Man-Kendalov trend test, a potom se rezultati kombinuju. Statistički značajni (p < 0,05)
pozitivni trendovi specifične aktivnosti berilijuma-7 dobijeni su za četiri lokacije:
Madrid (8,71·10-5 Bq·m-3/god), Bilbao (3,13·10-5 Bq·m-3/god), Luksemburg (4,00·10-5
Bq·m-3/god), i Ivalo (1,91·10-5 Bq·m-3/god), a statistički značajan pozitivan trend
temperature detektovan je samo za Madrid. Naša analiza ukazuje na povećanje
koncentracije berilijuma-7 u Evropi tokom 2000–2014, sa izraţenijim trendom na jugu
nego na severu. MeĎutim, kako dobijeni trendovi za temperaturu i količinu padavina
uglavnom nisu statistički značajni, nije moguće razmotriti njihovu meĎusobnu
povezanost. U budućim analizama ovog problema stoga treba uzeti u obzir duţe
vremenske nizove ovih promenljivih.
PB  - Institut za nuklearne nauke „Vinča"
C3  - Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija
T1  - Petnaestogodišnji trendovi specifične aktivnosti berilijuma-7 u vazduhu u Evropi
SP  - 29
EP  - 33
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2372
ER  - 

@conference{
author = "Ajtić, Jelena and Brattich, Erika and Hernández-Ceballos, Miguel Angel and Djurdjević, Vladimir",
year = "2019",
abstract = "MeĎu najbitnije faktore koji utiču na specifičnu aktivnost berilijuma-7 u prizemnom
sloju atmosfere spadaju temperatura i količina padavina. U ovom radu stoga
razmatramo njihove vremenske trendove izmeĎu 2000. i 2014. godine, na šest lokacija u
Evropi: Madrid i Bilbao (Španija) na jugu; Beč (Austrija) i Luksemburg (Luksemburg)
u centralnoj oblasti; kao i Riso (Danska) i Ivalo (Finska) na severu kontinenta. Podaci
za specifičnu aktivnost berilijuma-7 preuzeti su iz Radioactivity Environmental
Monitoring data bank (REMdb), a podaci za lokalnu temperaturu i količinu padavina iz
E-OBS gridovane klimatologije (verzija 15) i potom bilinearnom interpolacijom
ekstrahovani na šest lokacija uzorkovanja berilijuma-7. Za dobijanje trendova koristili
smo sezonski Kendalov test, u kome se za svaki mesec tokom godine prvo primeni
Man-Kendalov trend test, a potom se rezultati kombinuju. Statistički značajni (p < 0,05)
pozitivni trendovi specifične aktivnosti berilijuma-7 dobijeni su za četiri lokacije:
Madrid (8,71·10-5 Bq·m-3/god), Bilbao (3,13·10-5 Bq·m-3/god), Luksemburg (4,00·10-5
Bq·m-3/god), i Ivalo (1,91·10-5 Bq·m-3/god), a statistički značajan pozitivan trend
temperature detektovan je samo za Madrid. Naša analiza ukazuje na povećanje
koncentracije berilijuma-7 u Evropi tokom 2000–2014, sa izraţenijim trendom na jugu
nego na severu. MeĎutim, kako dobijeni trendovi za temperaturu i količinu padavina
uglavnom nisu statistički značajni, nije moguće razmotriti njihovu meĎusobnu
povezanost. U budućim analizama ovog problema stoga treba uzeti u obzir duţe
vremenske nizove ovih promenljivih.",
publisher = "Institut za nuklearne nauke „Vinča"",
journal = "Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija",
title = "Petnaestogodišnji trendovi specifične aktivnosti berilijuma-7 u vazduhu u Evropi",
pages = "29-33",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2372"
}

Ajtić, J., Brattich, E., Hernández-Ceballos, M. A.,& Djurdjević, V.. (2019). Petnaestogodišnji trendovi specifične aktivnosti berilijuma-7 u vazduhu u Evropi. in Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija
Institut za nuklearne nauke „Vinča"., 29-33.
https://hdl.handle.net/21.15107/rcub_veterinar_2372

Ajtić J, Brattich E, Hernández-Ceballos MA, Djurdjević V. Petnaestogodišnji trendovi specifične aktivnosti berilijuma-7 u vazduhu u Evropi. in Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija. 2019;:29-33.
https://hdl.handle.net/21.15107/rcub_veterinar_2372 .

Ajtić, Jelena, Brattich, Erika, Hernández-Ceballos, Miguel Angel, Djurdjević, Vladimir, "Petnaestogodišnji trendovi specifične aktivnosti berilijuma-7 u vazduhu u Evropi" in Zbornik radova sa XXX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 2–4. oktobar, 2019, Divčibare, Srbija (2019):29-33,
https://hdl.handle.net/21.15107/rcub_veterinar_2372 .

TY  - JOUR
AU  - Ajtić, Jelena
AU  - Sarvan, Darko
AU  - Mitrović, Branislava
AU  - Čučulović, Ana
AU  - Čučulović, Rodoljub
AU  - Frontasyeva, Marina
PY  - 2018
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1620
AB  - Instrumental neutron activation analysis is used to determine a content of 47 elements (Na, Mg, Al, Cl, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Ni, Co, Cu, Zn, As, Se, Br, Rb, Sr, Zr, Mo, Ag, Cd, Sb, I, Ba, Cs, La, Ce, Nd, Sm, Eu, Gd, Tb, Dy, Tm, Yb, Lu, Hf, Ta, W, Au, Hg, Th, and U) in mosses (Homolothecium sp., Hypnum cupressiforme Hedw., and Brachythecium mildeanum (Schimp.) Schimp.) and lichen (Cladonia fimbriata (L.) Fr.) collected in three locations in Eastern Serbia over years 2006-2010. Concentrations of six elements (Zr, Nd, Gd, Tm, Yb, and Lu) in mosses in Serbia are measured for the first time. For other elements, the obtained concentrations fall within the ranges reported for mosses and lichens in Europe, but no declining trend in concentrations of V, Cd, Cr, Zn, Ni, Fe, and Cu, that has been described in the literature, can be inferred from our results. Factor analysis shows that terrigenous and industrial components are the highest contributing factors to the elemental composition and that the most polluted measurement site is in the vicinity of a copper mining and smelting complex.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Nuclear Technology and Radiation Protection
T1  - Elemental composition of moss and lichen species in eastern Serbia
VL  - 33
IS  - 3
SP  - 275
EP  - 285
DO  - 10.2298/NTRP1803275A
ER  - 

@article{
author = "Ajtić, Jelena and Sarvan, Darko and Mitrović, Branislava and Čučulović, Ana and Čučulović, Rodoljub and Frontasyeva, Marina",
year = "2018",
abstract = "Instrumental neutron activation analysis is used to determine a content of 47 elements (Na, Mg, Al, Cl, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Ni, Co, Cu, Zn, As, Se, Br, Rb, Sr, Zr, Mo, Ag, Cd, Sb, I, Ba, Cs, La, Ce, Nd, Sm, Eu, Gd, Tb, Dy, Tm, Yb, Lu, Hf, Ta, W, Au, Hg, Th, and U) in mosses (Homolothecium sp., Hypnum cupressiforme Hedw., and Brachythecium mildeanum (Schimp.) Schimp.) and lichen (Cladonia fimbriata (L.) Fr.) collected in three locations in Eastern Serbia over years 2006-2010. Concentrations of six elements (Zr, Nd, Gd, Tm, Yb, and Lu) in mosses in Serbia are measured for the first time. For other elements, the obtained concentrations fall within the ranges reported for mosses and lichens in Europe, but no declining trend in concentrations of V, Cd, Cr, Zn, Ni, Fe, and Cu, that has been described in the literature, can be inferred from our results. Factor analysis shows that terrigenous and industrial components are the highest contributing factors to the elemental composition and that the most polluted measurement site is in the vicinity of a copper mining and smelting complex.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Nuclear Technology and Radiation Protection",
title = "Elemental composition of moss and lichen species in eastern Serbia",
volume = "33",
number = "3",
pages = "275-285",
doi = "10.2298/NTRP1803275A"
}

Ajtić, J., Sarvan, D., Mitrović, B., Čučulović, A., Čučulović, R.,& Frontasyeva, M.. (2018). Elemental composition of moss and lichen species in eastern Serbia. in Nuclear Technology and Radiation Protection
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 33(3), 275-285.
https://doi.org/10.2298/NTRP1803275A

Ajtić J, Sarvan D, Mitrović B, Čučulović A, Čučulović R, Frontasyeva M. Elemental composition of moss and lichen species in eastern Serbia. in Nuclear Technology and Radiation Protection. 2018;33(3):275-285.
doi:10.2298/NTRP1803275A .

Ajtić, Jelena, Sarvan, Darko, Mitrović, Branislava, Čučulović, Ana, Čučulović, Rodoljub, Frontasyeva, Marina, "Elemental composition of moss and lichen species in eastern Serbia" in Nuclear Technology and Radiation Protection, 33, no. 3 (2018):275-285,
https://doi.org/10.2298/NTRP1803275A . .

TY  - JOUR
AU  - Ajtić, Jelena
AU  - Brattich, Erika
AU  - Sarvan, Darko
AU  - Đurđević, V.
AU  - Hernández-Ceballos, Miguel A.
PY  - 2018
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1649
AB  - Relationships between the beryllium-7 activity concentrations in surface air and meteorological parameters (temperature, atmospheric pressure, and precipitation), teleconnection indices (Arctic Oscillation, North Atlantic Oscillation, and Scandinavian pattern) and number of sunspots are investigated using two multivariate statistical techniques: hierarchical cluster and factor analysis. The beryllium-7 surface measurements over 1995-2011, at four sampling sites located in the Scandinavian Peninsula, are obtained from the Radioactivity Environmental Monitoring Database. In all sites, the statistical analyses show that the beryllium-7 concentrations are strongly linked to temperature. Although the beryllium-7 surface concentration exhibits the well-characterised spring/summer maximum, our study shows that extremely high beryllium-7 concentrations, defined as the values exceeding the 90th percentile in the data records for each site, also occur over the October-March period. Two types of autumn/winter extremes are distinguished: type-1 when the number of extremes in a given month is less than three, and type-2 when at least three extremes occur in a month. Factor analysis performed for these autumn/winter events shows a weaker effect of temperature and a stronger impact of the transport and production signal on the beryllium-7 concentrations. Further, the majority of the type-2 extremes are associated with a very high monthly Scandinavian teleconnection index. The type-2 extremes that occurred in January, February and March are also linked to sudden stratospheric warmings of the Arctic vortex. Our results indicate that the Scandinavian teleconnection index might be a good indicator of the meteorological conditions facilitating extremely high beryllium-7 surface concentrations over Scandinavia during autumn and winter.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Chemosphere
T1  - Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter
VL  - 199
SP  - 278
EP  - 285
DO  - 10.1016/j.chemosphere.2018.02.052
ER  - 

@article{
author = "Ajtić, Jelena and Brattich, Erika and Sarvan, Darko and Đurđević, V. and Hernández-Ceballos, Miguel A.",
year = "2018",
abstract = "Relationships between the beryllium-7 activity concentrations in surface air and meteorological parameters (temperature, atmospheric pressure, and precipitation), teleconnection indices (Arctic Oscillation, North Atlantic Oscillation, and Scandinavian pattern) and number of sunspots are investigated using two multivariate statistical techniques: hierarchical cluster and factor analysis. The beryllium-7 surface measurements over 1995-2011, at four sampling sites located in the Scandinavian Peninsula, are obtained from the Radioactivity Environmental Monitoring Database. In all sites, the statistical analyses show that the beryllium-7 concentrations are strongly linked to temperature. Although the beryllium-7 surface concentration exhibits the well-characterised spring/summer maximum, our study shows that extremely high beryllium-7 concentrations, defined as the values exceeding the 90th percentile in the data records for each site, also occur over the October-March period. Two types of autumn/winter extremes are distinguished: type-1 when the number of extremes in a given month is less than three, and type-2 when at least three extremes occur in a month. Factor analysis performed for these autumn/winter events shows a weaker effect of temperature and a stronger impact of the transport and production signal on the beryllium-7 concentrations. Further, the majority of the type-2 extremes are associated with a very high monthly Scandinavian teleconnection index. The type-2 extremes that occurred in January, February and March are also linked to sudden stratospheric warmings of the Arctic vortex. Our results indicate that the Scandinavian teleconnection index might be a good indicator of the meteorological conditions facilitating extremely high beryllium-7 surface concentrations over Scandinavia during autumn and winter.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Chemosphere",
title = "Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter",
volume = "199",
pages = "278-285",
doi = "10.1016/j.chemosphere.2018.02.052"
}

Ajtić, J., Brattich, E., Sarvan, D., Đurđević, V.,& Hernández-Ceballos, M. A.. (2018). Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter. in Chemosphere
Pergamon-Elsevier Science Ltd, Oxford., 199, 278-285.
https://doi.org/10.1016/j.chemosphere.2018.02.052

Ajtić J, Brattich E, Sarvan D, Đurđević V, Hernández-Ceballos MA. Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter. in Chemosphere. 2018;199:278-285.
doi:10.1016/j.chemosphere.2018.02.052 .

Ajtić, Jelena, Brattich, Erika, Sarvan, Darko, Đurđević, V., Hernández-Ceballos, Miguel A., "Factors affecting the Be-7 surface concentration and its extremely high occurrences over the Scandinavian Peninsula during autumn and winter" in Chemosphere, 199 (2018):278-285,
https://doi.org/10.1016/j.chemosphere.2018.02.052 . .

TY  - CONF
AU  - Vranješ, Borjana
AU  - Mitrović, Branislava
AU  - Andrić, Velibor
AU  - Ajtić, Jelena
AU  - Vranješ, M.
PY  - 2017
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1455
AB  - Mineral additives, such as monocalcium phosphate, that are commonly used on pig farms, are obtained by processing phosphate mineral ore, and can contain high levels of 238U. Since ingestion is the main route of radioactive contamination of both animals and humans, the goal of this paper is to measure specific activity of natural and artificial radionuclides in monocalcium phosphate and complete feed mixtures for pigs. Mineral additives with high levels of natural radionuclides can contaminate complete feed mixtures making them unsuitable for use. Samples were collected from three different farms, and in total fifteen samples of monocalcium and forty five samples of complete feed mixture were measured. Samples of monocalcium phosphate show the 238U activity concentration of 13.2-2097Bq/kg. Other naturally occurring radionuclides are measured in monocalcium and the results give: 21.4-25.5 Bq/kg for 40K, 1.5 -12.1 Bq/kg for226Ra, 1.5-2.9 Bq/kg for 232Th, and 1.5-10.8 Bq/kg for 214Bi. These radionuclides are further measured in complete feed mixtures and only one sample shows elevated concentrations of 238U (3.1 Bq/kg) and 226Ra (3.5 Bq/kg). Potassium-40 is detected in all samples, with the specific activity range 208-329 Bq/kg, while other naturally occurring radionuclides and artificial radioceasium are below the detection limits.
PB  - RAD Association
C3  - RAD Conference Proceedings
T1  - Radioactivity in monocalcium phosphate and complete feed mixtures for pigs
VL  - 2
SP  - 121
EP  - 125
DO  - 10.21175/RadProc.2017.25
ER  - 

@conference{
author = "Vranješ, Borjana and Mitrović, Branislava and Andrić, Velibor and Ajtić, Jelena and Vranješ, M.",
year = "2017",
abstract = "Mineral additives, such as monocalcium phosphate, that are commonly used on pig farms, are obtained by processing phosphate mineral ore, and can contain high levels of 238U. Since ingestion is the main route of radioactive contamination of both animals and humans, the goal of this paper is to measure specific activity of natural and artificial radionuclides in monocalcium phosphate and complete feed mixtures for pigs. Mineral additives with high levels of natural radionuclides can contaminate complete feed mixtures making them unsuitable for use. Samples were collected from three different farms, and in total fifteen samples of monocalcium and forty five samples of complete feed mixture were measured. Samples of monocalcium phosphate show the 238U activity concentration of 13.2-2097Bq/kg. Other naturally occurring radionuclides are measured in monocalcium and the results give: 21.4-25.5 Bq/kg for 40K, 1.5 -12.1 Bq/kg for226Ra, 1.5-2.9 Bq/kg for 232Th, and 1.5-10.8 Bq/kg for 214Bi. These radionuclides are further measured in complete feed mixtures and only one sample shows elevated concentrations of 238U (3.1 Bq/kg) and 226Ra (3.5 Bq/kg). Potassium-40 is detected in all samples, with the specific activity range 208-329 Bq/kg, while other naturally occurring radionuclides and artificial radioceasium are below the detection limits.",
publisher = "RAD Association",
journal = "RAD Conference Proceedings",
title = "Radioactivity in monocalcium phosphate and complete feed mixtures for pigs",
volume = "2",
pages = "121-125",
doi = "10.21175/RadProc.2017.25"
}

Vranješ, B., Mitrović, B., Andrić, V., Ajtić, J.,& Vranješ, M.. (2017). Radioactivity in monocalcium phosphate and complete feed mixtures for pigs. in RAD Conference Proceedings
RAD Association., 2, 121-125.
https://doi.org/10.21175/RadProc.2017.25

Vranješ B, Mitrović B, Andrić V, Ajtić J, Vranješ M. Radioactivity in monocalcium phosphate and complete feed mixtures for pigs. in RAD Conference Proceedings. 2017;2:121-125.
doi:10.21175/RadProc.2017.25 .

Vranješ, Borjana, Mitrović, Branislava, Andrić, Velibor, Ajtić, Jelena, Vranješ, M., "Radioactivity in monocalcium phosphate and complete feed mixtures for pigs" in RAD Conference Proceedings, 2 (2017):121-125,
https://doi.org/10.21175/RadProc.2017.25 . .

TY  - CONF
AU  - Mitrović, Branislava
AU  - Andrić, Velibor
AU  - Vranješ, Borjana
AU  - Ajtić, Jelena
AU  - Grdović, Svetlana
AU  - Vićentijević, Mihajlo
PY  - 2017
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2377
AB  - U cilju procene uticaja deponije komunalnog otpada na životnu sredinu i lanac ishrane,gamaspektrometrijskom analizom ispitani su uzorci zemljišta, vode, kao i proizvodibiljnog i životinjskog porekla. Uzorci su prikupljeni tokom 2016. godine na područjuprigradske Opštine Grocka, u naselju Vinča. Rezultati pokazuju da je sadržaj prirodnihradionuklida na nivou karakterističnom za ispitivane vrste uzoraka. Proizvedeniradionuklid 137Cs detektovan je u zemljištu (7,1–41,1) Bq/kg, ali nije uključen u lanacishrane. Svi uzorci hrane biljnog i životinjskog porekla su radijaciono higijenskibezbedni za ljudsku ishranu.
AB  - To estimate an influence of amunicipal waste landfill on the environment and foodchain, gamma spectrometric analysis of the various environmental samples isconducted. The samples were collected in the village of Vinča, Grocka municipality,Belgrade, Serbia, during 2016, and included the following: soil at a depth of 0–20 cmand 20–40 cm; water samples from wells and the Danube river; fruit samples of apples,pears, peaches and apricots; vegetable samples of onions, carrots, potatoes, cabbagesand corn; products of animal origin used in human diet–eggs, goat milk, goat cheese,pork, pork liver and chicken meat. A content of 40K, 238U, 235U, 226Ra, 214Bi, 232Th, and137Cs in the samples is investigated. The results show concentrations of the naturalradionuclides within the reported ranges for Serbia. The artificial 137Cs is detected inthe soil (7.1–41.1 Bq/kg), but not in any of the other samples from the food chain.Therefore, our results imply that the products of plant and animal origin produced inthe vicinity of the landfill are radiologically safe for human consumption.
PB  - Beograd : Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
PB  - Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija
C3  - Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija
T1  - Radionuklidi u lancu ishrane na području opštine Grocka
T1  - Radionuclides in the food chain at the Grocka municipality
SP  - 45
EP  - 50
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2377
ER  - 

@conference{
author = "Mitrović, Branislava and Andrić, Velibor and Vranješ, Borjana and Ajtić, Jelena and Grdović, Svetlana and Vićentijević, Mihajlo",
year = "2017",
abstract = "U cilju procene uticaja deponije komunalnog otpada na životnu sredinu i lanac ishrane,gamaspektrometrijskom analizom ispitani su uzorci zemljišta, vode, kao i proizvodibiljnog i životinjskog porekla. Uzorci su prikupljeni tokom 2016. godine na područjuprigradske Opštine Grocka, u naselju Vinča. Rezultati pokazuju da je sadržaj prirodnihradionuklida na nivou karakterističnom za ispitivane vrste uzoraka. Proizvedeniradionuklid 137Cs detektovan je u zemljištu (7,1–41,1) Bq/kg, ali nije uključen u lanacishrane. Svi uzorci hrane biljnog i životinjskog porekla su radijaciono higijenskibezbedni za ljudsku ishranu., To estimate an influence of amunicipal waste landfill on the environment and foodchain, gamma spectrometric analysis of the various environmental samples isconducted. The samples were collected in the village of Vinča, Grocka municipality,Belgrade, Serbia, during 2016, and included the following: soil at a depth of 0–20 cmand 20–40 cm; water samples from wells and the Danube river; fruit samples of apples,pears, peaches and apricots; vegetable samples of onions, carrots, potatoes, cabbagesand corn; products of animal origin used in human diet–eggs, goat milk, goat cheese,pork, pork liver and chicken meat. A content of 40K, 238U, 235U, 226Ra, 214Bi, 232Th, and137Cs in the samples is investigated. The results show concentrations of the naturalradionuclides within the reported ranges for Serbia. The artificial 137Cs is detected inthe soil (7.1–41.1 Bq/kg), but not in any of the other samples from the food chain.Therefore, our results imply that the products of plant and animal origin produced inthe vicinity of the landfill are radiologically safe for human consumption.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore, Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija",
journal = "Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija",
title = "Radionuklidi u lancu ishrane na području opštine Grocka, Radionuclides in the food chain at the Grocka municipality",
pages = "45-50",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2377"
}

Mitrović, B., Andrić, V., Vranješ, B., Ajtić, J., Grdović, S.,& Vićentijević, M.. (2017). Radionuklidi u lancu ishrane na području opštine Grocka. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija
Beograd : Institut za nuklearne nauke "Vinča"., 45-50.
https://hdl.handle.net/21.15107/rcub_veterinar_2377

Mitrović B, Andrić V, Vranješ B, Ajtić J, Grdović S, Vićentijević M. Radionuklidi u lancu ishrane na području opštine Grocka. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija. 2017;:45-50.
https://hdl.handle.net/21.15107/rcub_veterinar_2377 .

Mitrović, Branislava, Andrić, Velibor, Vranješ, Borjana, Ajtić, Jelena, Grdović, Svetlana, Vićentijević, Mihajlo, "Radionuklidi u lancu ishrane na području opštine Grocka" in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija (2017):45-50,
https://hdl.handle.net/21.15107/rcub_veterinar_2377 .

TY  - JOUR
AU  - Sarvan, Darko
AU  - Stratimirović, Đorđe
AU  - Blesić, Suzana
AU  - Đurđević, V.
AU  - Miljković, V.
AU  - Ajtić, Jelena
PY  - 2017
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1497
AB  - The dynamics of the beryllium-7 specific activity in surface air over 1987-2011 is analyzed using wavelet transform (WT) analysis and time -dependent detrended moving average (tdDMA) method, WT analysis gives four periodicities in the beryllium-7 specific activity: one month, three months, one year, and three years. These intervals are further used in tdDMA to calculate local autocorrelation exponents for precipitation, tropopause height and teleconnection indices. Our results show that these parameters share common periods with the beryllium-7 surface concentration. tdDMA method indicates that on the characteristic intervals of one year and shorter, the beryllium-7 specific activity is strongly autocorrelated. On the three-year interval, the beryllium-7 specific activity shows periods of anticorrelat ion, implying slow changes in its dynamics that become evident only over a prolonged period of time. A comparison of the Hurst exponents of all the variables on the one- and three-year intervals suggest some similarities in their dynamics. Overall, a good agreement in the behavior of the teleconnection indices and specific activity of beryllium-7 in surface air is noted.
PB  - Elsevier, Amsterdam
T2  - Physica A-Statistical Mechanics and Its Applications
T1  - Dynamics of beryllium-7 specific activity in relation to meteorological variables, tropopause height, teleconnection indices and sunspot number
VL  - 469
SP  - 813
EP  - 823
DO  - 10.1016/j.physa.2016.11.040
ER  - 

@article{
author = "Sarvan, Darko and Stratimirović, Đorđe and Blesić, Suzana and Đurđević, V. and Miljković, V. and Ajtić, Jelena",
year = "2017",
abstract = "The dynamics of the beryllium-7 specific activity in surface air over 1987-2011 is analyzed using wavelet transform (WT) analysis and time -dependent detrended moving average (tdDMA) method, WT analysis gives four periodicities in the beryllium-7 specific activity: one month, three months, one year, and three years. These intervals are further used in tdDMA to calculate local autocorrelation exponents for precipitation, tropopause height and teleconnection indices. Our results show that these parameters share common periods with the beryllium-7 surface concentration. tdDMA method indicates that on the characteristic intervals of one year and shorter, the beryllium-7 specific activity is strongly autocorrelated. On the three-year interval, the beryllium-7 specific activity shows periods of anticorrelat ion, implying slow changes in its dynamics that become evident only over a prolonged period of time. A comparison of the Hurst exponents of all the variables on the one- and three-year intervals suggest some similarities in their dynamics. Overall, a good agreement in the behavior of the teleconnection indices and specific activity of beryllium-7 in surface air is noted.",
publisher = "Elsevier, Amsterdam",
journal = "Physica A-Statistical Mechanics and Its Applications",
title = "Dynamics of beryllium-7 specific activity in relation to meteorological variables, tropopause height, teleconnection indices and sunspot number",
volume = "469",
pages = "813-823",
doi = "10.1016/j.physa.2016.11.040"
}

Sarvan, D., Stratimirović, Đ., Blesić, S., Đurđević, V., Miljković, V.,& Ajtić, J.. (2017). Dynamics of beryllium-7 specific activity in relation to meteorological variables, tropopause height, teleconnection indices and sunspot number. in Physica A-Statistical Mechanics and Its Applications
Elsevier, Amsterdam., 469, 813-823.
https://doi.org/10.1016/j.physa.2016.11.040

Sarvan D, Stratimirović Đ, Blesić S, Đurđević V, Miljković V, Ajtić J. Dynamics of beryllium-7 specific activity in relation to meteorological variables, tropopause height, teleconnection indices and sunspot number. in Physica A-Statistical Mechanics and Its Applications. 2017;469:813-823.
doi:10.1016/j.physa.2016.11.040 .

Sarvan, Darko, Stratimirović, Đorđe, Blesić, Suzana, Đurđević, V., Miljković, V., Ajtić, Jelena, "Dynamics of beryllium-7 specific activity in relation to meteorological variables, tropopause height, teleconnection indices and sunspot number" in Physica A-Statistical Mechanics and Its Applications, 469 (2017):813-823,
https://doi.org/10.1016/j.physa.2016.11.040 . .

TY  - JOUR
AU  - Ajtić, Jelena
AU  - Sarvan, Darko
AU  - Đurđević, Vladimir S.
AU  - Hernández-Ceballos, Miguel A.
AU  - Brattich, Erika
PY  - 2017
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1458
AB  - Seasonal and spatial patterns of extremely high beryllium-7 surface concentration recorded over the 2001-2010 period across Europe are investigated. The beryllium-7 measurements for 14 sites are taken from the Radioactivity Environmental Monitoring Database. The maxima and minima in the annual cycle of the beryllium-7 surface concentration occur later in the year as the latitude of the measurement site decreases. Extremely high beryllium-7 surface concentrations are defined here as values greater than the 95th percentile in each measurement site. Most of the extremes occur over the March-August period. At least 10 % of the total number of extremes appear during autumn and winter, with an exception of Vienna, where all the extremes took place during spring and summer. The regional spread of extremes common to pairs of measurement sites points to an existence of three distinct regions in Europe: north of 55°N, between 45°N and 55°N, and south of 45°N. Although the beryllium-7 concentration records are significantly correlated across all the investigated sites, the strongest correlations are found within the identified regions.
AB  - Sezonska i prostorna raspodela ekstremno visokih specifičnih aktivnosti berilijuma-7 u prizemnom sloju atmosfere analizirane su u ovom radu. Merenja tokom 2001-2010. godine na 14 evropskih stanica preuzeta su iz REMdb-baze podataka Monitoring radioaktivnosti u životnoj sredini. Prvo su razmotreni godišnji ciklusi specifične aktivnosti berilijuma-7 koji pokazuju da se godišnje maksimalne i minimalne srednje mesečne vrednosti pomeraju ka kasnijim mesecima kako se smanjuje geografska širina merne stanice. Za ekstremno visoke vrednosti specifične aktivnosti berilijuma-7 uzete su vrednosti veće od 95-og percentila, koji je izračunat za svaku stanicu posebno. Najveći broj ovih ekstrema događa se od marta do avgusta, a najmanje 10 % od ukupnog broja ekstrema tokom jeseni i zime. Izuzetak je merna stanica Beč na kojoj su se svi ekstremi dogodili tokom proleća i leta. Rasprostranjenost ekstrema koji su zajednički za parove mernih mesta, ukazuje da postoje tri različita regiona u Evropi: severno od 55°N, između 45°N i 55°N, i južno od 45°N. Iako su merenja specifične aktivnosti berilijuma-7 značajno korelisana za sve analizirane stanice, najveći koeficijenti korelacije dobijeni su u okviru ovih regiona.
PB  - Univerzitet u Nišu, Niš
T2  - Facta universitatis - series: Physics, Chemistry and Technology
T1  - Beryllium-7 surface concentration extremes in Europe
T1  - Ekstremno visoke vrednosti specifične aktivnosti berilijuma-7 u prizemnom sloju atmosfere u Evropi
VL  - 15
IS  - 1
SP  - 45
EP  - 55
DO  - 10.2298/FUPCT1701045A
ER  - 

@article{
author = "Ajtić, Jelena and Sarvan, Darko and Đurđević, Vladimir S. and Hernández-Ceballos, Miguel A. and Brattich, Erika",
year = "2017",
abstract = "Seasonal and spatial patterns of extremely high beryllium-7 surface concentration recorded over the 2001-2010 period across Europe are investigated. The beryllium-7 measurements for 14 sites are taken from the Radioactivity Environmental Monitoring Database. The maxima and minima in the annual cycle of the beryllium-7 surface concentration occur later in the year as the latitude of the measurement site decreases. Extremely high beryllium-7 surface concentrations are defined here as values greater than the 95th percentile in each measurement site. Most of the extremes occur over the March-August period. At least 10 % of the total number of extremes appear during autumn and winter, with an exception of Vienna, where all the extremes took place during spring and summer. The regional spread of extremes common to pairs of measurement sites points to an existence of three distinct regions in Europe: north of 55°N, between 45°N and 55°N, and south of 45°N. Although the beryllium-7 concentration records are significantly correlated across all the investigated sites, the strongest correlations are found within the identified regions., Sezonska i prostorna raspodela ekstremno visokih specifičnih aktivnosti berilijuma-7 u prizemnom sloju atmosfere analizirane su u ovom radu. Merenja tokom 2001-2010. godine na 14 evropskih stanica preuzeta su iz REMdb-baze podataka Monitoring radioaktivnosti u životnoj sredini. Prvo su razmotreni godišnji ciklusi specifične aktivnosti berilijuma-7 koji pokazuju da se godišnje maksimalne i minimalne srednje mesečne vrednosti pomeraju ka kasnijim mesecima kako se smanjuje geografska širina merne stanice. Za ekstremno visoke vrednosti specifične aktivnosti berilijuma-7 uzete su vrednosti veće od 95-og percentila, koji je izračunat za svaku stanicu posebno. Najveći broj ovih ekstrema događa se od marta do avgusta, a najmanje 10 % od ukupnog broja ekstrema tokom jeseni i zime. Izuzetak je merna stanica Beč na kojoj su se svi ekstremi dogodili tokom proleća i leta. Rasprostranjenost ekstrema koji su zajednički za parove mernih mesta, ukazuje da postoje tri različita regiona u Evropi: severno od 55°N, između 45°N i 55°N, i južno od 45°N. Iako su merenja specifične aktivnosti berilijuma-7 značajno korelisana za sve analizirane stanice, najveći koeficijenti korelacije dobijeni su u okviru ovih regiona.",
publisher = "Univerzitet u Nišu, Niš",
journal = "Facta universitatis - series: Physics, Chemistry and Technology",
title = "Beryllium-7 surface concentration extremes in Europe, Ekstremno visoke vrednosti specifične aktivnosti berilijuma-7 u prizemnom sloju atmosfere u Evropi",
volume = "15",
number = "1",
pages = "45-55",
doi = "10.2298/FUPCT1701045A"
}

Ajtić, J., Sarvan, D., Đurđević, V. S., Hernández-Ceballos, M. A.,& Brattich, E.. (2017). Beryllium-7 surface concentration extremes in Europe. in Facta universitatis - series: Physics, Chemistry and Technology
Univerzitet u Nišu, Niš., 15(1), 45-55.
https://doi.org/10.2298/FUPCT1701045A

Ajtić J, Sarvan D, Đurđević VS, Hernández-Ceballos MA, Brattich E. Beryllium-7 surface concentration extremes in Europe. in Facta universitatis - series: Physics, Chemistry and Technology. 2017;15(1):45-55.
doi:10.2298/FUPCT1701045A .

Ajtić, Jelena, Sarvan, Darko, Đurđević, Vladimir S., Hernández-Ceballos, Miguel A., Brattich, Erika, "Beryllium-7 surface concentration extremes in Europe" in Facta universitatis - series: Physics, Chemistry and Technology, 15, no. 1 (2017):45-55,
https://doi.org/10.2298/FUPCT1701045A . .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Djurdjević, Vladimir
AU  - Sarvan, Darko
AU  - Brattich, Erika
AU  - Hernández-Ceballos, Miguel Angel
PY  - 2017
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2350
AB  - This work presents an overview of the results obtained in
an analysis of the 7Be activity concentrations recorded in
surface air in Helsinki, Finland, over a 25-year period
(1987-2011), and stored in the online Radioactivity
Environmental Monitoring (REM) database.
First, lagged linear correlations of the 7Be specific
activity with several meteorological variables:
tropopause height (TPH); mean, minimum and
maximum temperature; precipitation (Prec); atmospheric
pressure (Press); potential vorticity (PV) at 300 hPa and
200 hPa; solar zenith angle (SZA); and sunspot number
are analysed (Tab. 1). The time lag in the correlation
calculations is allowed to vary between 0 and 7 days for
TPH, meteorological parameters and PV, and between 0
and 31 days for SZA and sunspot number. The
correlations are calculated for the total set of
measurements as well as for different seasons.
C3  - Book of Abstracts of the Fourth International Conference on Environmental Radioactivity: Radionuclides as Tracers of Environmental Processes (ENVIRA2017), 29 May – 2 June, 2017, Vilnius, Lithuania
T1  - Analysis of beryllium-7 variability in northern Europe
SP  - 87
EP  - 87
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2350
ER  - 

@conference{
author = "Ajtić, Jelena and Djurdjević, Vladimir and Sarvan, Darko and Brattich, Erika and Hernández-Ceballos, Miguel Angel",
year = "2017",
abstract = "This work presents an overview of the results obtained in
an analysis of the 7Be activity concentrations recorded in
surface air in Helsinki, Finland, over a 25-year period
(1987-2011), and stored in the online Radioactivity
Environmental Monitoring (REM) database.
First, lagged linear correlations of the 7Be specific
activity with several meteorological variables:
tropopause height (TPH); mean, minimum and
maximum temperature; precipitation (Prec); atmospheric
pressure (Press); potential vorticity (PV) at 300 hPa and
200 hPa; solar zenith angle (SZA); and sunspot number
are analysed (Tab. 1). The time lag in the correlation
calculations is allowed to vary between 0 and 7 days for
TPH, meteorological parameters and PV, and between 0
and 31 days for SZA and sunspot number. The
correlations are calculated for the total set of
measurements as well as for different seasons.",
journal = "Book of Abstracts of the Fourth International Conference on Environmental Radioactivity: Radionuclides as Tracers of Environmental Processes (ENVIRA2017), 29 May – 2 June, 2017, Vilnius, Lithuania",
title = "Analysis of beryllium-7 variability in northern Europe",
pages = "87-87",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2350"
}

Ajtić, J., Djurdjević, V., Sarvan, D., Brattich, E.,& Hernández-Ceballos, M. A.. (2017). Analysis of beryllium-7 variability in northern Europe. in Book of Abstracts of the Fourth International Conference on Environmental Radioactivity: Radionuclides as Tracers of Environmental Processes (ENVIRA2017), 29 May – 2 June, 2017, Vilnius, Lithuania, 87-87.
https://hdl.handle.net/21.15107/rcub_veterinar_2350

Ajtić J, Djurdjević V, Sarvan D, Brattich E, Hernández-Ceballos MA. Analysis of beryllium-7 variability in northern Europe. in Book of Abstracts of the Fourth International Conference on Environmental Radioactivity: Radionuclides as Tracers of Environmental Processes (ENVIRA2017), 29 May – 2 June, 2017, Vilnius, Lithuania. 2017;:87-87.
https://hdl.handle.net/21.15107/rcub_veterinar_2350 .

Ajtić, Jelena, Djurdjević, Vladimir, Sarvan, Darko, Brattich, Erika, Hernández-Ceballos, Miguel Angel, "Analysis of beryllium-7 variability in northern Europe" in Book of Abstracts of the Fourth International Conference on Environmental Radioactivity: Radionuclides as Tracers of Environmental Processes (ENVIRA2017), 29 May – 2 June, 2017, Vilnius, Lithuania (2017):87-87,
https://hdl.handle.net/21.15107/rcub_veterinar_2350 .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Sarvan, Darko
AU  - Todorović, Dragana
AU  - Rajačić, Milica
AU  - Krneta-Nikolić, Jelena D.
AU  - Đurđević, Vladimir
AU  - Zorko, Benjamin
AU  - Vodenik, Branko
AU  - Glavič-Cindro, Denis
AU  - Kožar Logar, Jasmina
PY  - 2017
AB  - Međusobna povezanost specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnomsloju atmosfere sa meteorološkim parametrima razmotrena je u faktorskoj analizi.Merenja su sprovedena u Beogradu, Republika Srbija, i u Ljubljani i Krškom, uRepublici Sloveniji, tokom 1991–2015 godine. Na sve tri lokacije, faktorska opterećenjadva faktora pokazuju da je: 1) specifična aktivnost berilijuma-7 obuhvaćena faktorom 1sa temperaturom, oblačnošću i relativnom vlažnošću; dok je 2) specifična aktivnostolova-210 obuhvaćena faktorom 2 sa količinom padavina i atmosferskim pritiskom.Iako je komunalitet već dva faktora veći od 0,5 za većinu posmatranih varijabli, tekuvođenjem trećeg faktora komunalitet za specifičnu aktivnost olova-210 i atmosferskogpritiska na sve tri merne lokacije raste na preko 0,5. Rezultati faktorske analizepokazuju da se specifične aktivnosti berilijuma-7 i olova-210 u prizmenom slojuatmosfere nalaze pod različitim dominantnim uticajima. Koncentracija berilijuma-7 jepod uticajem faktora regionalnog karaktera, koji je takođe dominantan za srednjutemperaturu. Ova veza specifične aktivnosti berilijuma-7 i temperature preko dominantnog zajedničkog faktora važi i kada se broj faktora u analizi poveća na tri i četiri.Sa druge strane, na koncentraciju olova-210, kao i na količinu padavina i atmosferskipritisak, više uticaja ima lokalni faktor. Ova povezanost olova-210 sa druga dvameteorološka parametra, međutim, prestaje da važi sa povećanjem broja faktora uanalizi na tri, kada se izdvaja specifičan faktor koji objašnjava preko 80% varijansespecifične aktivnosti olova-210.
AB  - An association between the beryllium-7 and lead-210 specific activities in surface airand meteorological parameters is investigated using factor analysis. The measurementswere conducted in Belgrade, Republic of Serbia, and Ljubljana and Krško, Republic ofSlovenia, over 1991–2015. In all the locations, the factor loadings of two factors showthat: 1) the beryllium-7 specific activity is encompassed by factor 1 together withtemperature, cloud cover and relative humidity; while 2) the lead-210 specific activity,precipitation and atmospheric pressure are described by factor 2. Although thecommunalities of only two factors are already larger than 0.5 for most of the variables,an introduction of a third factor raises the communalities of all the variables above 0.5.The results imply that the beryllium-7 and lead-210 are under different dominantunderlying mechanisms. The concentration of beryllium-7 seems to be primarilyinfluenced by a mechanism of a regional character which is also a predominant factorfor temperature. This association between the beryllium-7 specific activity andtemperature prevails even when the number of factors in the analysis is raised to threeand four. The lead-210 specific activity, on the other hand, together with precipitationand atmospheric pressure, is under an influence of a local mechanism, but thatrelationship between the variables ceases to hold when the number of factors is raisedto three, and more than 80% of the variance in the Pb-210 specific activity is explainedby one specific factor.
PB  - Beograd : Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija
T1  - Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara
T1  - Factor analysis of the beryllium-7 and lead-210 specific activities in surface air, and meteorological parameters
SP  - 19
EP  - 27
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2375
ER  - 

@conference{
author = "Ajtić, Jelena and Sarvan, Darko and Todorović, Dragana and Rajačić, Milica and Krneta-Nikolić, Jelena D. and Đurđević, Vladimir and Zorko, Benjamin and Vodenik, Branko and Glavič-Cindro, Denis and Kožar Logar, Jasmina",
year = "2017",
abstract = "Međusobna povezanost specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnomsloju atmosfere sa meteorološkim parametrima razmotrena je u faktorskoj analizi.Merenja su sprovedena u Beogradu, Republika Srbija, i u Ljubljani i Krškom, uRepublici Sloveniji, tokom 1991–2015 godine. Na sve tri lokacije, faktorska opterećenjadva faktora pokazuju da je: 1) specifična aktivnost berilijuma-7 obuhvaćena faktorom 1sa temperaturom, oblačnošću i relativnom vlažnošću; dok je 2) specifična aktivnostolova-210 obuhvaćena faktorom 2 sa količinom padavina i atmosferskim pritiskom.Iako je komunalitet već dva faktora veći od 0,5 za većinu posmatranih varijabli, tekuvođenjem trećeg faktora komunalitet za specifičnu aktivnost olova-210 i atmosferskogpritiska na sve tri merne lokacije raste na preko 0,5. Rezultati faktorske analizepokazuju da se specifične aktivnosti berilijuma-7 i olova-210 u prizmenom slojuatmosfere nalaze pod različitim dominantnim uticajima. Koncentracija berilijuma-7 jepod uticajem faktora regionalnog karaktera, koji je takođe dominantan za srednjutemperaturu. Ova veza specifične aktivnosti berilijuma-7 i temperature preko dominantnog zajedničkog faktora važi i kada se broj faktora u analizi poveća na tri i četiri.Sa druge strane, na koncentraciju olova-210, kao i na količinu padavina i atmosferskipritisak, više uticaja ima lokalni faktor. Ova povezanost olova-210 sa druga dvameteorološka parametra, međutim, prestaje da važi sa povećanjem broja faktora uanalizi na tri, kada se izdvaja specifičan faktor koji objašnjava preko 80% varijansespecifične aktivnosti olova-210., An association between the beryllium-7 and lead-210 specific activities in surface airand meteorological parameters is investigated using factor analysis. The measurementswere conducted in Belgrade, Republic of Serbia, and Ljubljana and Krško, Republic ofSlovenia, over 1991–2015. In all the locations, the factor loadings of two factors showthat: 1) the beryllium-7 specific activity is encompassed by factor 1 together withtemperature, cloud cover and relative humidity; while 2) the lead-210 specific activity,precipitation and atmospheric pressure are described by factor 2. Although thecommunalities of only two factors are already larger than 0.5 for most of the variables,an introduction of a third factor raises the communalities of all the variables above 0.5.The results imply that the beryllium-7 and lead-210 are under different dominantunderlying mechanisms. The concentration of beryllium-7 seems to be primarilyinfluenced by a mechanism of a regional character which is also a predominant factorfor temperature. This association between the beryllium-7 specific activity andtemperature prevails even when the number of factors in the analysis is raised to threeand four. The lead-210 specific activity, on the other hand, together with precipitationand atmospheric pressure, is under an influence of a local mechanism, but thatrelationship between the variables ceases to hold when the number of factors is raisedto three, and more than 80% of the variance in the Pb-210 specific activity is explainedby one specific factor.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija",
title = "Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara, Factor analysis of the beryllium-7 and lead-210 specific activities in surface air, and meteorological parameters",
pages = "19-27",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2375"
}

Ajtić, J., Sarvan, D., Todorović, D., Rajačić, M., Krneta-Nikolić, J. D., Đurđević, V., Zorko, B., Vodenik, B., Glavič-Cindro, D.,& Kožar Logar, J.. (2017). Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija
Beograd : Institut za nuklearne nauke "Vinča"., 19-27.
https://hdl.handle.net/21.15107/rcub_veterinar_2375

Ajtić J, Sarvan D, Todorović D, Rajačić M, Krneta-Nikolić JD, Đurđević V, Zorko B, Vodenik B, Glavič-Cindro D, Kožar Logar J. Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija. 2017;:19-27.
https://hdl.handle.net/21.15107/rcub_veterinar_2375 .

Ajtić, Jelena, Sarvan, Darko, Todorović, Dragana, Rajačić, Milica, Krneta-Nikolić, Jelena D., Đurđević, Vladimir, Zorko, Benjamin, Vodenik, Branko, Glavič-Cindro, Denis, Kožar Logar, Jasmina, "Faktorska analiza specifičnih aktivnosti berilijuma-7 i olova-210 u prizemnom sloju vazduha, i meteoroloških parametara" in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, str. Srebrno jezero, Srbija (2017):19-27,
https://hdl.handle.net/21.15107/rcub_veterinar_2375 .

TY  - CONF
AU  - Vukašinović, Ivana
AU  - Todorović, Dragana
AU  - Nikolić, Jelena D.
AU  - Rajačić, Milica
AU  - Ajtić, Jelena
PY  - 2017
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2376
AB  - Specifična aktivnost prirodnih radionuklida 238U, 235U, 226Ra, 210Pb, 232Th i 40K iproizvedenog 137Cs je merena u uzorcima lišća dve vrste listopadnog drveća, kestena(Aesculus hippocastanum) i lipe (Tilia spp) koji potiču iz tri gradska parka na užempodručju Beograda. Uzorci su sakupljani u vreme prolećne (n=7), letnje (n=2) i jesenje(n=8) sezone u periodu od 2002-2012. godine. Iz svake pojedinačne sezone uzorci lišćasu spojeni po vrstama pri čemu je dobijen jedan integralni (sezonski) uzorak za svakiispitivani park čime je postignuta veća efikasnost detekcije niskog nivoa gama zračenja.Za određivanje aktivnosti primenjen je metod spektrometrije gama emitera. U svimpojedinačnim uzorcima suve materije lišća detekcija radionuklida 210Pb i 40K je bilamoguća i njihova specifična aktivnost se nalazila intervalu 15-52 Bq/kg i 310-650Bq/kg, respektivno. Iako je aktivnost 226Ra bila veoma niska, u intervalu 0,5-5,6 Bq/kg,ovaj radionuklid je bio izmeren u svim uzorcima (osim u dva) i svim sezonama.Aktivnost 210Pb i 226Ra se povećavala tokom godine, pri čemu su njihove najvećevrednosti izmerene u lišću kestena u letnjoj sezoni. Suprotno, aktivnost 40K u lišću lipe ikestena je opadala tokom godine. Za razliku od prethodno navedenih, radionuklidi 238U,235U i 232Th su retko detektovani samo u letnjem i/ili jesenjem periodu i po četiri uzorkališća su sadržali 238U (2,7-11,7 Bq/kg) i 235U (0,13-1,0 Bq/kg), a tri 232Th (1,8-3,3Bq/kg). Proizvedeni radionuklid 137Cs detektovan je u svim uzorcima lišća (osim u dva),a bez jasnog trenda ponašanja po sezonama i nalazio se u intervalu 0,3-1,2 Bq/kg. Ciljrada bio je ispitivanje akumulacije prirodnih radionuklida i njihovog potencijalnogvariranja tokom godine u lišću listopadnog drveća.
AB  - The specific activity of naturally occurring radionuclides 238U, 235U, 226Ra, 210Pb, 232Th,and 40K and fallout 137Cs was measured in the samples of leaves of two deciduous treespecies, chestnut (Aesculus hippocastanum) and linden (Tilia spp.) common for theBelgrade urban area. Samples were collected in the spring (n = 7), summer (n = 2) andautumn (n = 8) during the vegetation period from 2002 to 2012. From each season,samples of leaves were combined according to two species and one single integral(seasonal) sample was obtained in order to improve detection efficiency of low gammaradiation level. Specific activities were determined using the gamma-ray spectrometrymethod. 210Pb and 40K radionuclides were detected in all the samples of leaves and theirspecific activity was in the range (Bq/kg dry weight): 15 - 52 and 310 - 650,respectively. Although the 226Ra level was very low and in the range from 0.5 - 5.6Bq/kg, this radionuclide has been measured in all samples (except in the two) and eachseason.210Pb and 226Ra activity increased during the vegetation period and theirhighest values were found in the leaves of chestnut trees in the summer season. Incontrast, the activity of 40K in the leaves of linden and chestnut has decreased.Detection 238U, 235U and 232Th radionuclides was scarce and only in the summer and/orautumn. Four samples of leaves contained 238U (2.7 - 11.7 Bq/kg dry wt) and 235U (0,13- 1.0 Bq/kg dry wt) and three of them 232Th (1.8 - 3.3 Bq/kg dry wt). Man-maderadionuclide 137Cs (0.3-1.2 Bq/kg dry wt) was detected in all samples of leaves (exceptin two) and no clear trend according to seasons was found. The aim was to investigatethe accumulation of naturally occurring radionuclides and fallout 137Cs in the leaves ofdeciduous trees and their potential variations during the vegetation period.
PB  - Beograd : Institut za nuklearne nauke "Vinča"
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija
T1  - Sezonske promene aktivnosti prirodnih radionuklida i proizvedenog 137-Cs u uzorcima lišća listopadnog drveća
T1  - Seasonal changes of naturally occurring radionuclides and fallout 137-Cs in the samples of leaves of deciduous trees
SP  - 117
EP  - 123
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2376
ER  - 

@conference{
author = "Vukašinović, Ivana and Todorović, Dragana and Nikolić, Jelena D. and Rajačić, Milica and Ajtić, Jelena",
year = "2017",
abstract = "Specifična aktivnost prirodnih radionuklida 238U, 235U, 226Ra, 210Pb, 232Th i 40K iproizvedenog 137Cs je merena u uzorcima lišća dve vrste listopadnog drveća, kestena(Aesculus hippocastanum) i lipe (Tilia spp) koji potiču iz tri gradska parka na užempodručju Beograda. Uzorci su sakupljani u vreme prolećne (n=7), letnje (n=2) i jesenje(n=8) sezone u periodu od 2002-2012. godine. Iz svake pojedinačne sezone uzorci lišćasu spojeni po vrstama pri čemu je dobijen jedan integralni (sezonski) uzorak za svakiispitivani park čime je postignuta veća efikasnost detekcije niskog nivoa gama zračenja.Za određivanje aktivnosti primenjen je metod spektrometrije gama emitera. U svimpojedinačnim uzorcima suve materije lišća detekcija radionuklida 210Pb i 40K je bilamoguća i njihova specifična aktivnost se nalazila intervalu 15-52 Bq/kg i 310-650Bq/kg, respektivno. Iako je aktivnost 226Ra bila veoma niska, u intervalu 0,5-5,6 Bq/kg,ovaj radionuklid je bio izmeren u svim uzorcima (osim u dva) i svim sezonama.Aktivnost 210Pb i 226Ra se povećavala tokom godine, pri čemu su njihove najvećevrednosti izmerene u lišću kestena u letnjoj sezoni. Suprotno, aktivnost 40K u lišću lipe ikestena je opadala tokom godine. Za razliku od prethodno navedenih, radionuklidi 238U,235U i 232Th su retko detektovani samo u letnjem i/ili jesenjem periodu i po četiri uzorkališća su sadržali 238U (2,7-11,7 Bq/kg) i 235U (0,13-1,0 Bq/kg), a tri 232Th (1,8-3,3Bq/kg). Proizvedeni radionuklid 137Cs detektovan je u svim uzorcima lišća (osim u dva),a bez jasnog trenda ponašanja po sezonama i nalazio se u intervalu 0,3-1,2 Bq/kg. Ciljrada bio je ispitivanje akumulacije prirodnih radionuklida i njihovog potencijalnogvariranja tokom godine u lišću listopadnog drveća., The specific activity of naturally occurring radionuclides 238U, 235U, 226Ra, 210Pb, 232Th,and 40K and fallout 137Cs was measured in the samples of leaves of two deciduous treespecies, chestnut (Aesculus hippocastanum) and linden (Tilia spp.) common for theBelgrade urban area. Samples were collected in the spring (n = 7), summer (n = 2) andautumn (n = 8) during the vegetation period from 2002 to 2012. From each season,samples of leaves were combined according to two species and one single integral(seasonal) sample was obtained in order to improve detection efficiency of low gammaradiation level. Specific activities were determined using the gamma-ray spectrometrymethod. 210Pb and 40K radionuclides were detected in all the samples of leaves and theirspecific activity was in the range (Bq/kg dry weight): 15 - 52 and 310 - 650,respectively. Although the 226Ra level was very low and in the range from 0.5 - 5.6Bq/kg, this radionuclide has been measured in all samples (except in the two) and eachseason.210Pb and 226Ra activity increased during the vegetation period and theirhighest values were found in the leaves of chestnut trees in the summer season. Incontrast, the activity of 40K in the leaves of linden and chestnut has decreased.Detection 238U, 235U and 232Th radionuclides was scarce and only in the summer and/orautumn. Four samples of leaves contained 238U (2.7 - 11.7 Bq/kg dry wt) and 235U (0,13- 1.0 Bq/kg dry wt) and three of them 232Th (1.8 - 3.3 Bq/kg dry wt). Man-maderadionuclide 137Cs (0.3-1.2 Bq/kg dry wt) was detected in all samples of leaves (exceptin two) and no clear trend according to seasons was found. The aim was to investigatethe accumulation of naturally occurring radionuclides and fallout 137Cs in the leaves ofdeciduous trees and their potential variations during the vegetation period.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča", Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija",
title = "Sezonske promene aktivnosti prirodnih radionuklida i proizvedenog 137-Cs u uzorcima lišća listopadnog drveća, Seasonal changes of naturally occurring radionuclides and fallout 137-Cs in the samples of leaves of deciduous trees",
pages = "117-123",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2376"
}

Vukašinović, I., Todorović, D., Nikolić, J. D., Rajačić, M.,& Ajtić, J.. (2017). Sezonske promene aktivnosti prirodnih radionuklida i proizvedenog 137-Cs u uzorcima lišća listopadnog drveća. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija
Beograd : Institut za nuklearne nauke "Vinča"., 117-123.
https://hdl.handle.net/21.15107/rcub_veterinar_2376

Vukašinović I, Todorović D, Nikolić JD, Rajačić M, Ajtić J. Sezonske promene aktivnosti prirodnih radionuklida i proizvedenog 137-Cs u uzorcima lišća listopadnog drveća. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija. 2017;:117-123.
https://hdl.handle.net/21.15107/rcub_veterinar_2376 .

Vukašinović, Ivana, Todorović, Dragana, Nikolić, Jelena D., Rajačić, Milica, Ajtić, Jelena, "Sezonske promene aktivnosti prirodnih radionuklida i proizvedenog 137-Cs u uzorcima lišća listopadnog drveća" in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija (2017):117-123,
https://hdl.handle.net/21.15107/rcub_veterinar_2376 .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Blesić, Suzana
AU  - Allen, Martin W.
AU  - Wright, Caradee Y.
AU  - Stratimirović, Đorđe
PY  - 2017
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2374
AB  - Izlaganje sunčevom ultravioletnom (UV) zračenju analizirano je za dve grupe skijaša:
jedna grupa merila je izlaganje tokom 1-7. januara 2017. na skijalištu Stara Planina,
Srbija, a druga od 29. januara do 3. februara 2017. u skijalištu Val Soni, Francuska.
Izlaganje je mereno ličnim monitorima UV zračenja. U Val Soniju, dva monitora merila
su spoljašnje UV zračenje koje je uzeto kao referentna tačka za izmerena lična
izlaganja. Metodom vejvlet transformacije (VT) izračunate su spektralne funkcije
izmerenih podataka kako bi se ustanovili pojedinačni obrasci ponašanja skijaša i nivo
individualne izloženosti UV zračenju. Rezultati ne pokazuju razliku u srednjem nivou
grupne izloženosti na različitim lokacijama, jer se u oba slučaja dobija srednja vrednost
nagiba VT spektra snage signala približno jednaka jedan. Ova vrednost govori o
visokom stepenu izlaganja sunčevom UV zračenju, koja je kod skijaša najverovatnije
posledica dugotrajnog kontinuiranog boravka na suncu. Obrasci ponašanja skijaša,
međutim, pojedinačno se razlikuju u oba skijališta, što se ogleda u nagibu VT
spektralnih funkcija koji se kreće u rasponu od (0,50±0,02) do (1,44±0,02). U VT
spektralnim funkcijama uočeni su karakteristični maksimumi koji mogu da ukažu na
dužinu ukupnog kontinuiranog pojedinačnog izlaganja UV zračenju kod skijaša. Ovaj
kvantitativni podatak može poslužiti u budućim procenama potrebe za korigovanjem
pojedinačnog ponašanja na suncu.
AB  - Exposure to solar ultraviolet (UV) radiation is analysed for two groups of skiers. One
group measured UV exposure over 1-7 January 2017 in the StaraPlanina ski resort in
Serbia, while the other performed measurements between 29 January and 3 February
2017 in the Val Cenis ski resort in France. Exposure was measured using personal UV
monitors. In Val Cenis, two monitors recorded ambient UV radiation which is taken as
a reference point for the measured personal exposures. To establish personal patterns
of behaviour and a level of individual exposure to solar UV, wavelet transform (WT) is
used to calculate spectral functions of the obtained data. The results show no significant
difference in the mean levels of group exposure at different locations, as the mean slope
of the WT spectra is approximately one in both cases. This value implies a high UV
exposure which most likely results from prolonged periods of time spent in the sun. On
the other hand, the individual slopes of the WT spectral functions range between
(0.50±0.02) and (1.44±0.02), and thusindicate personal differences in behavioural
patterns of the skiers. Further, the WT spectral functions show characteristic peaks that
demonstrate the duration of the total continual individual UV exposure in skiers, and
this result could be used in future assessments and recommendations for modification of
personal behaviour in the sun.
PB  - Institut za nuklearne nauke „Vinča“
PB  - Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija
T1  - Merenje izlaganja sunčevom ultravioletnom zračenju: Stara Planina, Srbija i Val Soni, Francuska
T1  - Measurements Of Solar Ultraviolet Exposure: Stara Planina, Serbia And Val Cenis, France
SP  - 600
EP  - 608
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2374
ER  - 

@conference{
author = "Ajtić, Jelena and Blesić, Suzana and Allen, Martin W. and Wright, Caradee Y. and Stratimirović, Đorđe",
year = "2017",
abstract = "Izlaganje sunčevom ultravioletnom (UV) zračenju analizirano je za dve grupe skijaša:
jedna grupa merila je izlaganje tokom 1-7. januara 2017. na skijalištu Stara Planina,
Srbija, a druga od 29. januara do 3. februara 2017. u skijalištu Val Soni, Francuska.
Izlaganje je mereno ličnim monitorima UV zračenja. U Val Soniju, dva monitora merila
su spoljašnje UV zračenje koje je uzeto kao referentna tačka za izmerena lična
izlaganja. Metodom vejvlet transformacije (VT) izračunate su spektralne funkcije
izmerenih podataka kako bi se ustanovili pojedinačni obrasci ponašanja skijaša i nivo
individualne izloženosti UV zračenju. Rezultati ne pokazuju razliku u srednjem nivou
grupne izloženosti na različitim lokacijama, jer se u oba slučaja dobija srednja vrednost
nagiba VT spektra snage signala približno jednaka jedan. Ova vrednost govori o
visokom stepenu izlaganja sunčevom UV zračenju, koja je kod skijaša najverovatnije
posledica dugotrajnog kontinuiranog boravka na suncu. Obrasci ponašanja skijaša,
međutim, pojedinačno se razlikuju u oba skijališta, što se ogleda u nagibu VT
spektralnih funkcija koji se kreće u rasponu od (0,50±0,02) do (1,44±0,02). U VT
spektralnim funkcijama uočeni su karakteristični maksimumi koji mogu da ukažu na
dužinu ukupnog kontinuiranog pojedinačnog izlaganja UV zračenju kod skijaša. Ovaj
kvantitativni podatak može poslužiti u budućim procenama potrebe za korigovanjem
pojedinačnog ponašanja na suncu., Exposure to solar ultraviolet (UV) radiation is analysed for two groups of skiers. One
group measured UV exposure over 1-7 January 2017 in the StaraPlanina ski resort in
Serbia, while the other performed measurements between 29 January and 3 February
2017 in the Val Cenis ski resort in France. Exposure was measured using personal UV
monitors. In Val Cenis, two monitors recorded ambient UV radiation which is taken as
a reference point for the measured personal exposures. To establish personal patterns
of behaviour and a level of individual exposure to solar UV, wavelet transform (WT) is
used to calculate spectral functions of the obtained data. The results show no significant
difference in the mean levels of group exposure at different locations, as the mean slope
of the WT spectra is approximately one in both cases. This value implies a high UV
exposure which most likely results from prolonged periods of time spent in the sun. On
the other hand, the individual slopes of the WT spectral functions range between
(0.50±0.02) and (1.44±0.02), and thusindicate personal differences in behavioural
patterns of the skiers. Further, the WT spectral functions show characteristic peaks that
demonstrate the duration of the total continual individual UV exposure in skiers, and
this result could be used in future assessments and recommendations for modification of
personal behaviour in the sun.",
publisher = "Institut za nuklearne nauke „Vinča“, Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija",
title = "Merenje izlaganja sunčevom ultravioletnom zračenju: Stara Planina, Srbija i Val Soni, Francuska, Measurements Of Solar Ultraviolet Exposure: Stara Planina, Serbia And Val Cenis, France",
pages = "600-608",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2374"
}

Ajtić, J., Blesić, S., Allen, M. W., Wright, C. Y.,& Stratimirović, Đ.. (2017). Merenje izlaganja sunčevom ultravioletnom zračenju: Stara Planina, Srbija i Val Soni, Francuska. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija
Institut za nuklearne nauke „Vinča“., 600-608.
https://hdl.handle.net/21.15107/rcub_veterinar_2374

Ajtić J, Blesić S, Allen MW, Wright CY, Stratimirović Đ. Merenje izlaganja sunčevom ultravioletnom zračenju: Stara Planina, Srbija i Val Soni, Francuska. in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija. 2017;:600-608.
https://hdl.handle.net/21.15107/rcub_veterinar_2374 .

Ajtić, Jelena, Blesić, Suzana, Allen, Martin W., Wright, Caradee Y., Stratimirović, Đorđe, "Merenje izlaganja sunčevom ultravioletnom zračenju: Stara Planina, Srbija i Val Soni, Francuska" in Zbornik radova sa XXIX Simpozijuma Društva za zaštitu od zračenja Srbije i Crne Gore, 27–29. septembar, 2017, Srebrno jezero, Srbija (2017):600-608,
https://hdl.handle.net/21.15107/rcub_veterinar_2374 .

TY  - JOUR
AU  - Mitrović, Branislava
AU  - Ajtić, Jelena
AU  - Lazić, Marko
AU  - Andrić, Velibor
AU  - Krstić, Nikola
AU  - Vranješ, Borjana
AU  - Vićentijević, Mihajlo
PY  - 2016
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1401
AB  - To evaluate the state of the environment in Kopaonik, a mountain in Serbia, the activity concentrations of (4) K, Ra-226, Th-232 and Cs-137 in five different types of environmental samples are determined by gamma ray spectrometry, and radiological hazard due to terrestrial radionuclides is calculated. The mean activity concentrations of natural radionuclides in the soil are higher than the global average. However, with an exception of two sampling locations, the external radiation hazard index is below one, implying an insignificant radiation hazard. Apart from K-40, content of the natural radionuclides is predominantly below minimum detectable activities in grass and cow milk, but not in mosses. Although Cs-137 is present in the soil, grass, mosses and herbal plants, its specific activity in cow milk is below minimum detectable activity. Amongst the investigated herbal plants, Vaccinium myrtillus L. shows accumulating properties, as a high content of Cs-137 is detected therein. Therefore, moderation is advised in consuming Vaccinium myrtillus L. tea.
PB  - Elsevier Sci Ltd, Oxford
T2  - Environmental Pollution
T1  - Natural and anthropogenic radioactivity in the environment of Kopaonik mountain, Serbia
VL  - 215
SP  - 273
EP  - 279
DO  - 10.1016/j.envpol.2016.05.031
ER  - 

@article{
author = "Mitrović, Branislava and Ajtić, Jelena and Lazić, Marko and Andrić, Velibor and Krstić, Nikola and Vranješ, Borjana and Vićentijević, Mihajlo",
year = "2016",
abstract = "To evaluate the state of the environment in Kopaonik, a mountain in Serbia, the activity concentrations of (4) K, Ra-226, Th-232 and Cs-137 in five different types of environmental samples are determined by gamma ray spectrometry, and radiological hazard due to terrestrial radionuclides is calculated. The mean activity concentrations of natural radionuclides in the soil are higher than the global average. However, with an exception of two sampling locations, the external radiation hazard index is below one, implying an insignificant radiation hazard. Apart from K-40, content of the natural radionuclides is predominantly below minimum detectable activities in grass and cow milk, but not in mosses. Although Cs-137 is present in the soil, grass, mosses and herbal plants, its specific activity in cow milk is below minimum detectable activity. Amongst the investigated herbal plants, Vaccinium myrtillus L. shows accumulating properties, as a high content of Cs-137 is detected therein. Therefore, moderation is advised in consuming Vaccinium myrtillus L. tea.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Environmental Pollution",
title = "Natural and anthropogenic radioactivity in the environment of Kopaonik mountain, Serbia",
volume = "215",
pages = "273-279",
doi = "10.1016/j.envpol.2016.05.031"
}

Mitrović, B., Ajtić, J., Lazić, M., Andrić, V., Krstić, N., Vranješ, B.,& Vićentijević, M.. (2016). Natural and anthropogenic radioactivity in the environment of Kopaonik mountain, Serbia. in Environmental Pollution
Elsevier Sci Ltd, Oxford., 215, 273-279.
https://doi.org/10.1016/j.envpol.2016.05.031

Mitrović B, Ajtić J, Lazić M, Andrić V, Krstić N, Vranješ B, Vićentijević M. Natural and anthropogenic radioactivity in the environment of Kopaonik mountain, Serbia. in Environmental Pollution. 2016;215:273-279.
doi:10.1016/j.envpol.2016.05.031 .

Mitrović, Branislava, Ajtić, Jelena, Lazić, Marko, Andrić, Velibor, Krstić, Nikola, Vranješ, Borjana, Vićentijević, Mihajlo, "Natural and anthropogenic radioactivity in the environment of Kopaonik mountain, Serbia" in Environmental Pollution, 215 (2016):273-279,
https://doi.org/10.1016/j.envpol.2016.05.031 . .

TY  - JOUR
AU  - Mitrović, Branislava
AU  - Grdović, Svetlana
AU  - Vranješ, Borjana
AU  - Vićentijević, Mihajlo
AU  - Ajtić, Jelena
AU  - Sarvan, Darko
PY  - 2016
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2370
AB  - Activity concentrations of 40K, 238U, 232Th and 137Cs in the samples of cultivated and uncultivated soil,
mosses, mushrooms and game meat (wild rabbit, pheasant and wild boar) are measured by the gamma spectrometry
technique. The samples were collected in suburban areas of Belgrade, Serbia, in the period from 2008–2014. The
mean activity concentrations of 40K, 238U and 232Th in cultivated soil аre 637 Bqkg-1, 52 Bqkg-1 and 53 Bqkg-1, and in
uncultivated soil 608 Bqkg-1, 58 Bqkg-1 and 55 Bqkg-1, respectively. An artificial radionuclide 137Cs is detected in the
samples of soil, mosses and mushrooms, which indicates that almost 30 years after the nuclear accident in Chernobyl,
137Cs is still present in the environment. Since the activity concentrations of primordial radionuclides and 137Cs in
game meat are below detection limit, these samples can be classified as safe for consumption.
PB  - Niš : RAD Association
T2  - Radiation & Applications
T1  - Radioecological investigation in the environment of Belgrade city, Serbia
VL  - 1
IS  - 3
DO  - 10.21175/RadJ.2016.03.037
ER  - 

@article{
author = "Mitrović, Branislava and Grdović, Svetlana and Vranješ, Borjana and Vićentijević, Mihajlo and Ajtić, Jelena and Sarvan, Darko",
year = "2016",
abstract = "Activity concentrations of 40K, 238U, 232Th and 137Cs in the samples of cultivated and uncultivated soil,
mosses, mushrooms and game meat (wild rabbit, pheasant and wild boar) are measured by the gamma spectrometry
technique. The samples were collected in suburban areas of Belgrade, Serbia, in the period from 2008–2014. The
mean activity concentrations of 40K, 238U and 232Th in cultivated soil аre 637 Bqkg-1, 52 Bqkg-1 and 53 Bqkg-1, and in
uncultivated soil 608 Bqkg-1, 58 Bqkg-1 and 55 Bqkg-1, respectively. An artificial radionuclide 137Cs is detected in the
samples of soil, mosses and mushrooms, which indicates that almost 30 years after the nuclear accident in Chernobyl,
137Cs is still present in the environment. Since the activity concentrations of primordial radionuclides and 137Cs in
game meat are below detection limit, these samples can be classified as safe for consumption.",
publisher = "Niš : RAD Association",
journal = "Radiation & Applications",
title = "Radioecological investigation in the environment of Belgrade city, Serbia",
volume = "1",
number = "3",
doi = "10.21175/RadJ.2016.03.037"
}

Mitrović, B., Grdović, S., Vranješ, B., Vićentijević, M., Ajtić, J.,& Sarvan, D.. (2016). Radioecological investigation in the environment of Belgrade city, Serbia. in Radiation & Applications
Niš : RAD Association., 1(3).
https://doi.org/10.21175/RadJ.2016.03.037

Mitrović B, Grdović S, Vranješ B, Vićentijević M, Ajtić J, Sarvan D. Radioecological investigation in the environment of Belgrade city, Serbia. in Radiation & Applications. 2016;1(3).
doi:10.21175/RadJ.2016.03.037 .

Mitrović, Branislava, Grdović, Svetlana, Vranješ, Borjana, Vićentijević, Mihajlo, Ajtić, Jelena, Sarvan, Darko, "Radioecological investigation in the environment of Belgrade city, Serbia" in Radiation & Applications, 1, no. 3 (2016),
https://doi.org/10.21175/RadJ.2016.03.037 . .

TY  - CHAP
AU  - Mitrović, Branislava
AU  - Ajtić, Jelena
AU  - Grdović, Svetlana
AU  - Andrić, Velibor
AU  - Lazić, Marko
AU  - Vranješ, Borjana
PY  - 2016
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2440
AB  - Tokom 1987–2013. godine vršena su ispitivanja na planinama Kopaonik, Tara, Maljen iZlatibor, sa ciljem da se utvrdi sadržaj 137Cs u ovim područjima i njegova migracija krozlanac ishrane. Specifična aktivnost 137Cs u zemlji, travi, senu, mleku, mlečnimproizvodima, mesu i biljnim čajevima određena je standardnom metodom spektrometrijegama zračenja na poluprovodničkim detektorima. Rezultati pokazuju da je černobiljskiradiocezijum i dalje prisutan u životnoj sredini. U svim karikama lanca ishrane: zemljište– biljke – proizvodi životinjskog porekla, tokom 2000–2007. godine na Tari i Maljenu,detektovan je radiocezijum, a najviši stepen kontaminacije nađen je u uzorcima sapodručja Maljena. Međutim, u uzorcima sa Kopaonika koji su prikupljeni 2013. godine,radiocezijum nije detektovan u mleku, siru niti u mesu. Razlike u nivou kontaminacijezemljišta na ispitivanim lokacijama posledica su razlika u količini padavina poslečernobiljskog akcidenta, nadmorske visine, karakteristika reljefa, sastava zemljišta i vrstebiljaka. Najviša specifična aktivnost 137Cs u lekovitom bilju sakupljenom tokom2011–2012. godine u planinskim područjima, izmerena je u vrsti V. myrtillus
AB  - To investigate content of 137Cs and its migration through the food chain in mountainousregions in Serbia, environmental samples were collected over 1987–2013. Specificactivity of 137Cs in samples of the soil, grass, hay, milk, dairy products, meat and herbaltea plants was determined by standard gamma spectroscopy on semiconductor detectors.Samples from the mountains of Kopaonik, Tara, Maljen and Zlatibor were analysed. Theresults imply that the Chernobyl radioceasium is still present in the environment.Radioceasium was detected in all parts of the food chain, from the soil, through plants toanimal products, in Tara and Maljen over 2000–2007. A higher level of contaminationwas found in the samples from Maljen. However, 137Cs was not detected in the milk,cheese and meat samples that were collected from Kopaonik during 2013. Differences inthe soil contamination noted across the investigated locations are a result of a number offactors, including the amount of precipitation after the Chernobyl nuclear accident,altitude, type of relief, soil and plants. The highest 137Cs specific activity in herbal teaplants that were collected over 2011–2012, is measured in V. mirtillus.
PB  - Beograd : Institut za nuklearne nauke "Vinča", Laboratorija za zaštitu od zračenja i zaštitu životne sredine : Društvo za zaštitu od zračenja Srbije i Crne Gore
T2  - Černobilj : 30 godina posle : monografija
T1  - Radiocezijum u životnoj sredini planinskih regiona na teritoriji Republike Srbije
T1  - Radiocaesium in the mountain environments in Serbia
SP  - 127
EP  - 135
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2440
ER  - 

@inbook{
author = "Mitrović, Branislava and Ajtić, Jelena and Grdović, Svetlana and Andrić, Velibor and Lazić, Marko and Vranješ, Borjana",
year = "2016",
abstract = "Tokom 1987–2013. godine vršena su ispitivanja na planinama Kopaonik, Tara, Maljen iZlatibor, sa ciljem da se utvrdi sadržaj 137Cs u ovim područjima i njegova migracija krozlanac ishrane. Specifična aktivnost 137Cs u zemlji, travi, senu, mleku, mlečnimproizvodima, mesu i biljnim čajevima određena je standardnom metodom spektrometrijegama zračenja na poluprovodničkim detektorima. Rezultati pokazuju da je černobiljskiradiocezijum i dalje prisutan u životnoj sredini. U svim karikama lanca ishrane: zemljište– biljke – proizvodi životinjskog porekla, tokom 2000–2007. godine na Tari i Maljenu,detektovan je radiocezijum, a najviši stepen kontaminacije nađen je u uzorcima sapodručja Maljena. Međutim, u uzorcima sa Kopaonika koji su prikupljeni 2013. godine,radiocezijum nije detektovan u mleku, siru niti u mesu. Razlike u nivou kontaminacijezemljišta na ispitivanim lokacijama posledica su razlika u količini padavina poslečernobiljskog akcidenta, nadmorske visine, karakteristika reljefa, sastava zemljišta i vrstebiljaka. Najviša specifična aktivnost 137Cs u lekovitom bilju sakupljenom tokom2011–2012. godine u planinskim područjima, izmerena je u vrsti V. myrtillus, To investigate content of 137Cs and its migration through the food chain in mountainousregions in Serbia, environmental samples were collected over 1987–2013. Specificactivity of 137Cs in samples of the soil, grass, hay, milk, dairy products, meat and herbaltea plants was determined by standard gamma spectroscopy on semiconductor detectors.Samples from the mountains of Kopaonik, Tara, Maljen and Zlatibor were analysed. Theresults imply that the Chernobyl radioceasium is still present in the environment.Radioceasium was detected in all parts of the food chain, from the soil, through plants toanimal products, in Tara and Maljen over 2000–2007. A higher level of contaminationwas found in the samples from Maljen. However, 137Cs was not detected in the milk,cheese and meat samples that were collected from Kopaonik during 2013. Differences inthe soil contamination noted across the investigated locations are a result of a number offactors, including the amount of precipitation after the Chernobyl nuclear accident,altitude, type of relief, soil and plants. The highest 137Cs specific activity in herbal teaplants that were collected over 2011–2012, is measured in V. mirtillus.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča", Laboratorija za zaštitu od zračenja i zaštitu životne sredine : Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "Černobilj : 30 godina posle : monografija",
booktitle = "Radiocezijum u životnoj sredini planinskih regiona na teritoriji Republike Srbije, Radiocaesium in the mountain environments in Serbia",
pages = "127-135",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2440"
}

Mitrović, B., Ajtić, J., Grdović, S., Andrić, V., Lazić, M.,& Vranješ, B.. (2016). Radiocezijum u životnoj sredini planinskih regiona na teritoriji Republike Srbije. in Černobilj : 30 godina posle : monografija
Beograd : Institut za nuklearne nauke "Vinča", Laboratorija za zaštitu od zračenja i zaštitu životne sredine : Društvo za zaštitu od zračenja Srbije i Crne Gore., 127-135.
https://hdl.handle.net/21.15107/rcub_veterinar_2440

Mitrović B, Ajtić J, Grdović S, Andrić V, Lazić M, Vranješ B. Radiocezijum u životnoj sredini planinskih regiona na teritoriji Republike Srbije. in Černobilj : 30 godina posle : monografija. 2016;:127-135.
https://hdl.handle.net/21.15107/rcub_veterinar_2440 .

Mitrović, Branislava, Ajtić, Jelena, Grdović, Svetlana, Andrić, Velibor, Lazić, Marko, Vranješ, Borjana, "Radiocezijum u životnoj sredini planinskih regiona na teritoriji Republike Srbije" in Černobilj : 30 godina posle : monografija (2016):127-135,
https://hdl.handle.net/21.15107/rcub_veterinar_2440 .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Đurđević, Vladimir
AU  - Sarvan, Darko
AU  - Brattich, Erika
AU  - Hernandez-Ceballos, Miguel A.
PY  - 2016
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1335
AB  - This analysis presents linear correlations of beryllium-7 specific activity in surface air with several variables measured in Helsinki, Finland, over 1987-2011. Measurements of beryllium-7 are linearly correlated with the following 10 variables: tropopause height; mean, minimum and maximum temperature; precipitation; atmospheric pressure; potential vorticity at 300 hPa and 200 hPa; solar zenith angle; and the number of sunspots. A time lag is also introduced into the calculations of Pearsons linear correlation coefficients, i.e. the beryllium-7 specific activity measured on a day is correlated with a value of a given variable measured on some preceding day. In particular, the time lag is allowed to vary between 0 and 7 days for tropopause height, meteorological parameters and potential vorticity, and between 0 and 31 days for solar zenith angle and number of sunspots. In this way, we obtain sets of correlation coefficients for each pair of the analysed variables, in which we look for the maximum correlation coefficient as well as for the time lag on which this value is reached. In addition to investigating all of the available measurements, the time series are further split into seasonal subsets. Weak to moderate maximum correlation coefficients, ranging between 0.29 and 0.44, are found for the beryllium-7 specific activity with the tropopause height, temperatures and atmospheric pressure. These correlations are reached with a time lag of 0-2 days. Seasonal correlation coefficients show that the strongest linear relationships are obtained in summer. Similarly, a moderate correlation (0.48) with the solar zenith angle is reached with a time lag of 0 days, but the seasonal correlation coefficients in this case show a weaker relationship during different seasons. On the other hand, our analysis suggests that the correlations of beryllium-7 with precipitation, potential vorticity and the number of sunspots are not statistically significant.
PB  - RAD Association
C3  - Fourth International Conference on Radiation and Applications in Various Fields of Research
T1  - Beryllium-7 specific activity in surface air and its correlation with meteorological variables, solar zenith angle, and number of sunspots
SP  - 79
EP  - 83
DO  - 10.21175/RadProc.2016.19
ER  - 

@conference{
author = "Ajtić, Jelena and Đurđević, Vladimir and Sarvan, Darko and Brattich, Erika and Hernandez-Ceballos, Miguel A.",
year = "2016",
abstract = "This analysis presents linear correlations of beryllium-7 specific activity in surface air with several variables measured in Helsinki, Finland, over 1987-2011. Measurements of beryllium-7 are linearly correlated with the following 10 variables: tropopause height; mean, minimum and maximum temperature; precipitation; atmospheric pressure; potential vorticity at 300 hPa and 200 hPa; solar zenith angle; and the number of sunspots. A time lag is also introduced into the calculations of Pearsons linear correlation coefficients, i.e. the beryllium-7 specific activity measured on a day is correlated with a value of a given variable measured on some preceding day. In particular, the time lag is allowed to vary between 0 and 7 days for tropopause height, meteorological parameters and potential vorticity, and between 0 and 31 days for solar zenith angle and number of sunspots. In this way, we obtain sets of correlation coefficients for each pair of the analysed variables, in which we look for the maximum correlation coefficient as well as for the time lag on which this value is reached. In addition to investigating all of the available measurements, the time series are further split into seasonal subsets. Weak to moderate maximum correlation coefficients, ranging between 0.29 and 0.44, are found for the beryllium-7 specific activity with the tropopause height, temperatures and atmospheric pressure. These correlations are reached with a time lag of 0-2 days. Seasonal correlation coefficients show that the strongest linear relationships are obtained in summer. Similarly, a moderate correlation (0.48) with the solar zenith angle is reached with a time lag of 0 days, but the seasonal correlation coefficients in this case show a weaker relationship during different seasons. On the other hand, our analysis suggests that the correlations of beryllium-7 with precipitation, potential vorticity and the number of sunspots are not statistically significant.",
publisher = "RAD Association",
journal = "Fourth International Conference on Radiation and Applications in Various Fields of Research",
title = "Beryllium-7 specific activity in surface air and its correlation with meteorological variables, solar zenith angle, and number of sunspots",
pages = "79-83",
doi = "10.21175/RadProc.2016.19"
}

Ajtić, J., Đurđević, V., Sarvan, D., Brattich, E.,& Hernandez-Ceballos, M. A.. (2016). Beryllium-7 specific activity in surface air and its correlation with meteorological variables, solar zenith angle, and number of sunspots. in Fourth International Conference on Radiation and Applications in Various Fields of Research
RAD Association., 79-83.
https://doi.org/10.21175/RadProc.2016.19

Ajtić J, Đurđević V, Sarvan D, Brattich E, Hernandez-Ceballos MA. Beryllium-7 specific activity in surface air and its correlation with meteorological variables, solar zenith angle, and number of sunspots. in Fourth International Conference on Radiation and Applications in Various Fields of Research. 2016;:79-83.
doi:10.21175/RadProc.2016.19 .

Ajtić, Jelena, Đurđević, Vladimir, Sarvan, Darko, Brattich, Erika, Hernandez-Ceballos, Miguel A., "Beryllium-7 specific activity in surface air and its correlation with meteorological variables, solar zenith angle, and number of sunspots" in Fourth International Conference on Radiation and Applications in Various Fields of Research (2016):79-83,
https://doi.org/10.21175/RadProc.2016.19 . .

TY  - JOUR
AU  - Ajtić, Jelena
AU  - Djurdjević, Vladimir
AU  - Sarvan, Darko
AU  - Brattich, Erika
AU  - Hernández-Ceballos, Miguel Angel
PY  - 2016
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2369
AB  - We present an analysis of the maxima in a large dataset of the beryllium-7 specific activities measured in
surface air in Helsinki, Finland, over 25 years (1987-2011), which are stored in the online Radioactivity
Environmental Monitoring (REM) database. The maxima are defined as events with the beryllium-7 specific activity
above the 95th percentile, which, for the Helsinki data set, equals to 4.8210-3 Bqm-3. The beryllium-7 specific activity
in Helsinki shows a seasonal pattern with the monthly means above 2.0010-3 Bqm-3 during the warm season (April–
September), and below 2.0010-3 Bqm-3 during the cold season (October–March). The analysis of the extremes shows
that 10 % occurred in the cold season, and these “cold extremes” are analysed in more detail. Amongst the cold
extremes, three representative “episodes” are identified. The episodes, which occurred in March 1999, February 2003
and February 2005, show extremely high beryllium-7 specific activities measured over several consecutive days.
Anomalies of potential vorticity, sea level pressure and surface temperature, as well as precipitation, over Europe
and the Atlantic are investigated. A brief analysis of one cold extreme, classified as “burst” since it was an isolated
event surrounded by measurements below the 95th percentile, is also presented in an attempt to find common
mechanisms that contribute to both cold extreme episodes and bursts. Scandinavia teleconnection index seems to
represent a good indicator of potentially preferential atmospheric conditions that could lead to cold extreme episode
occurrences in the Scandinavian region.
PB  - Niš : RAD Association
T2  - Radiation & Applications
T1  - Analysis of extreme beryllium-7 specific activities in surface air
VL  - 1
IS  - 3
DO  - 10.21175/RadJ.2016.03.040
ER  - 

@article{
author = "Ajtić, Jelena and Djurdjević, Vladimir and Sarvan, Darko and Brattich, Erika and Hernández-Ceballos, Miguel Angel",
year = "2016",
abstract = "We present an analysis of the maxima in a large dataset of the beryllium-7 specific activities measured in
surface air in Helsinki, Finland, over 25 years (1987-2011), which are stored in the online Radioactivity
Environmental Monitoring (REM) database. The maxima are defined as events with the beryllium-7 specific activity
above the 95th percentile, which, for the Helsinki data set, equals to 4.8210-3 Bqm-3. The beryllium-7 specific activity
in Helsinki shows a seasonal pattern with the monthly means above 2.0010-3 Bqm-3 during the warm season (April–
September), and below 2.0010-3 Bqm-3 during the cold season (October–March). The analysis of the extremes shows
that 10 % occurred in the cold season, and these “cold extremes” are analysed in more detail. Amongst the cold
extremes, three representative “episodes” are identified. The episodes, which occurred in March 1999, February 2003
and February 2005, show extremely high beryllium-7 specific activities measured over several consecutive days.
Anomalies of potential vorticity, sea level pressure and surface temperature, as well as precipitation, over Europe
and the Atlantic are investigated. A brief analysis of one cold extreme, classified as “burst” since it was an isolated
event surrounded by measurements below the 95th percentile, is also presented in an attempt to find common
mechanisms that contribute to both cold extreme episodes and bursts. Scandinavia teleconnection index seems to
represent a good indicator of potentially preferential atmospheric conditions that could lead to cold extreme episode
occurrences in the Scandinavian region.",
publisher = "Niš : RAD Association",
journal = "Radiation & Applications",
title = "Analysis of extreme beryllium-7 specific activities in surface air",
volume = "1",
number = "3",
doi = "10.21175/RadJ.2016.03.040"
}

Ajtić, J., Djurdjević, V., Sarvan, D., Brattich, E.,& Hernández-Ceballos, M. A.. (2016). Analysis of extreme beryllium-7 specific activities in surface air. in Radiation & Applications
Niš : RAD Association., 1(3).
https://doi.org/10.21175/RadJ.2016.03.040

Ajtić J, Djurdjević V, Sarvan D, Brattich E, Hernández-Ceballos MA. Analysis of extreme beryllium-7 specific activities in surface air. in Radiation & Applications. 2016;1(3).
doi:10.21175/RadJ.2016.03.040 .

Ajtić, Jelena, Djurdjević, Vladimir, Sarvan, Darko, Brattich, Erika, Hernández-Ceballos, Miguel Angel, "Analysis of extreme beryllium-7 specific activities in surface air" in Radiation & Applications, 1, no. 3 (2016),
https://doi.org/10.21175/RadJ.2016.03.040 . .

TY  - CONF
AU  - Ajtić, Jelena
AU  - Djurdjević, Vladimir
AU  - Hernández-Ceballos, Miguel Angel
AU  - Brattich, Erika
PY  - 2016
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/2356
AB  - Specific activity of cosmogenic 7
Be in surface air generally shows a spring-summer maximum. However,
extremely high 7
Be concentrations in surface air also occur during winter. The aim of our analysis is to
characterise temporal and spatial prevalence of winter extreme events, and to investigate the associated
synoptic meteorological conditions in northern Europe. Four measurement sites, with an approximate weekly
sampling rate over the 2001–2010 period, are selected from the online Radioactivity Environmental
Monitoring (REM) Database. The extremes in the 7
Be surface concentration are defined as measurements
above the 90th percentile in each location.The results indicate that at each measurement site, 10–20 % of the
extremes occur during winter (November, December, January and February). Two types of 7
Be extremes are
distinguished: 1) approximately half of these occurrences are isolated events detected in one or two stations,
and 2) the other half are events grouped within four months, when at least three 7
Be extremes per month are
observed. The monthly Scandinavia (SCAND) teleconnection index for isolated extreme events (type-1) is
positive and, with only one exception, larger than 0.4, while in the case of type-2 events, the monthly
SCAND is very high (larger than 1).This finding implies that in northern Europe during winter, the
atmospheric conditions associated with a high SCAND index facilitate an occurrence of extreme 7
Be surface
concentration.
C3  - Proceedings of the Second International Conference on Radioecological Concentrations Processes (50 years later), November 6–9, 2016, Seville, Spain
T1  - Winter extremes of beryllium-7 surface concentrations in northern Europe
SP  - I3
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_2356
ER  - 

@conference{
author = "Ajtić, Jelena and Djurdjević, Vladimir and Hernández-Ceballos, Miguel Angel and Brattich, Erika",
year = "2016",
abstract = "Specific activity of cosmogenic 7
Be in surface air generally shows a spring-summer maximum. However,
extremely high 7
Be concentrations in surface air also occur during winter. The aim of our analysis is to
characterise temporal and spatial prevalence of winter extreme events, and to investigate the associated
synoptic meteorological conditions in northern Europe. Four measurement sites, with an approximate weekly
sampling rate over the 2001–2010 period, are selected from the online Radioactivity Environmental
Monitoring (REM) Database. The extremes in the 7
Be surface concentration are defined as measurements
above the 90th percentile in each location.The results indicate that at each measurement site, 10–20 % of the
extremes occur during winter (November, December, January and February). Two types of 7
Be extremes are
distinguished: 1) approximately half of these occurrences are isolated events detected in one or two stations,
and 2) the other half are events grouped within four months, when at least three 7
Be extremes per month are
observed. The monthly Scandinavia (SCAND) teleconnection index for isolated extreme events (type-1) is
positive and, with only one exception, larger than 0.4, while in the case of type-2 events, the monthly
SCAND is very high (larger than 1).This finding implies that in northern Europe during winter, the
atmospheric conditions associated with a high SCAND index facilitate an occurrence of extreme 7
Be surface
concentration.",
journal = "Proceedings of the Second International Conference on Radioecological Concentrations Processes (50 years later), November 6–9, 2016, Seville, Spain",
title = "Winter extremes of beryllium-7 surface concentrations in northern Europe",
pages = "I3",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_2356"
}

Ajtić, J., Djurdjević, V., Hernández-Ceballos, M. A.,& Brattich, E.. (2016). Winter extremes of beryllium-7 surface concentrations in northern Europe. in Proceedings of the Second International Conference on Radioecological Concentrations Processes (50 years later), November 6–9, 2016, Seville, Spain, I3.
https://hdl.handle.net/21.15107/rcub_veterinar_2356

Ajtić J, Djurdjević V, Hernández-Ceballos MA, Brattich E. Winter extremes of beryllium-7 surface concentrations in northern Europe. in Proceedings of the Second International Conference on Radioecological Concentrations Processes (50 years later), November 6–9, 2016, Seville, Spain. 2016;:I3.
https://hdl.handle.net/21.15107/rcub_veterinar_2356 .

Ajtić, Jelena, Djurdjević, Vladimir, Hernández-Ceballos, Miguel Angel, Brattich, Erika, "Winter extremes of beryllium-7 surface concentrations in northern Europe" in Proceedings of the Second International Conference on Radioecological Concentrations Processes (50 years later), November 6–9, 2016, Seville, Spain (2016):I3,
https://hdl.handle.net/21.15107/rcub_veterinar_2356 .

TY  - JOUR
AU  - Hernández-Ceballos, Miguel A.
AU  - Brattich, Erika
AU  - Cinelli, Giorgia
AU  - Ajtić, Jelena
AU  - Đurđević, Vladimir
PY  - 2016
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1406
AB  - This study aims at analysing the latitudinal variability of both the yearly and seasonal pattern of Be-7 surface activity concentrations, at addressing the impact of tropopause height (TPH) on Be-7 distribution and at evaluating the time lag between TPH and Be-7 at European level. With this aim, weekly Be-7 and daily TPH data at 17 sampling stations during 10 yr (2001-2010) are analysed. Be-7 shows a clear increasing tendency in the period and generally tends to increase with decreasing latitude. The seasonal pattern generally shows maxima during the warm period and minima during the cold one. The seasonal variogram analysis points out a good spatial correlation for TPH data while a weaker one is observed for Be-7, having TPH a larger influence on Be-7 during summer. The influence of TPH on Be-7 exhibits a large spatial variability, with a clear gap between south and north in the area of the polar front jet. The results identify the presence of two main groups, in particular separating between stations located in northern Europe (50 degrees N and higher) and stations in southern Europe (south of 50 degrees N). A similar behaviour for stations located in the same geographical area is also observed when looking at the day of maximum impact of TPH on Be-7 concentrations. The results suggest that Be-7 concentrations respond in different time ranges to changes in the TPH, observing seasonal differences in each group. These results represent the first European approach to the understanding of the TPH impact on Be-7 concentrations at surface levels.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Tellus Series B-Chemical and Physical Meteorology
T1  - Seasonality of 7 Be concentrations in Europe and influence of tropopause height
VL  - 68
SP  - 29534
DO  - 10.3402/tellusb.v68.29534
ER  - 

@article{
author = "Hernández-Ceballos, Miguel A. and Brattich, Erika and Cinelli, Giorgia and Ajtić, Jelena and Đurđević, Vladimir",
year = "2016",
abstract = "This study aims at analysing the latitudinal variability of both the yearly and seasonal pattern of Be-7 surface activity concentrations, at addressing the impact of tropopause height (TPH) on Be-7 distribution and at evaluating the time lag between TPH and Be-7 at European level. With this aim, weekly Be-7 and daily TPH data at 17 sampling stations during 10 yr (2001-2010) are analysed. Be-7 shows a clear increasing tendency in the period and generally tends to increase with decreasing latitude. The seasonal pattern generally shows maxima during the warm period and minima during the cold one. The seasonal variogram analysis points out a good spatial correlation for TPH data while a weaker one is observed for Be-7, having TPH a larger influence on Be-7 during summer. The influence of TPH on Be-7 exhibits a large spatial variability, with a clear gap between south and north in the area of the polar front jet. The results identify the presence of two main groups, in particular separating between stations located in northern Europe (50 degrees N and higher) and stations in southern Europe (south of 50 degrees N). A similar behaviour for stations located in the same geographical area is also observed when looking at the day of maximum impact of TPH on Be-7 concentrations. The results suggest that Be-7 concentrations respond in different time ranges to changes in the TPH, observing seasonal differences in each group. These results represent the first European approach to the understanding of the TPH impact on Be-7 concentrations at surface levels.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Tellus Series B-Chemical and Physical Meteorology",
title = "Seasonality of 7 Be concentrations in Europe and influence of tropopause height",
volume = "68",
pages = "29534",
doi = "10.3402/tellusb.v68.29534"
}

Hernández-Ceballos, M. A., Brattich, E., Cinelli, G., Ajtić, J.,& Đurđević, V.. (2016). Seasonality of 7 Be concentrations in Europe and influence of tropopause height. in Tellus Series B-Chemical and Physical Meteorology
Taylor & Francis Ltd, Abingdon., 68, 29534.
https://doi.org/10.3402/tellusb.v68.29534

Hernández-Ceballos MA, Brattich E, Cinelli G, Ajtić J, Đurđević V. Seasonality of 7 Be concentrations in Europe and influence of tropopause height. in Tellus Series B-Chemical and Physical Meteorology. 2016;68:29534.
doi:10.3402/tellusb.v68.29534 .

Hernández-Ceballos, Miguel A., Brattich, Erika, Cinelli, Giorgia, Ajtić, Jelena, Đurđević, Vladimir, "Seasonality of 7 Be concentrations in Europe and influence of tropopause height" in Tellus Series B-Chemical and Physical Meteorology, 68 (2016):29534,
https://doi.org/10.3402/tellusb.v68.29534 . .

TY  - JOUR
AU  - Blesić, Suzana
AU  - Stratimirović, Đorđe
AU  - Ajtić, Jelena
AU  - Wright, Caradee
AU  - Allen, Martin W.
PY  - 2016
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1426
AB  - Personal sun exposure measurements provide important information to guide the development of sun awareness and disease prevention campaigns. We assess the scaling properties of personal ultraviolet radiation (pUVR) sun exposure measurements using the wavelet transform (WT) spectral analysis to process long-range, high-frequency personal recordings collected by electronic UVR dosimeters designed to measure erythemal UVR exposure. We analysed the sun exposure recordings of school children, farmers, marathon runners and outdoor workers in South Africa, and construction workers and work site supervisors in New Zealand. We found scaling behaviour in all the analysed pUVR data sets. We found that the observed scaling changes from uncorrelated to long-range correlated with increasing duration of sun exposure. Peaks in the WT spectra that we found suggest the existence of characteristic times in sun exposure behaviour that were to some extent universal across our data set. Our study also showed that WT measures enable group classification, as well as distinction between individual UVR exposures, otherwise unattainable by conventional statistical methods.
PB  - Nature Publishing Group, New York
T2  - Journal of Exposure Science and Environmental Epidemiology
T1  - Novel approach to analysing large data sets of personal sun exposure measurements
VL  - 26
IS  - 6
SP  - 613
EP  - 620
DO  - 10.1038/jes.2016.43
ER  - 

@article{
author = "Blesić, Suzana and Stratimirović, Đorđe and Ajtić, Jelena and Wright, Caradee and Allen, Martin W.",
year = "2016",
abstract = "Personal sun exposure measurements provide important information to guide the development of sun awareness and disease prevention campaigns. We assess the scaling properties of personal ultraviolet radiation (pUVR) sun exposure measurements using the wavelet transform (WT) spectral analysis to process long-range, high-frequency personal recordings collected by electronic UVR dosimeters designed to measure erythemal UVR exposure. We analysed the sun exposure recordings of school children, farmers, marathon runners and outdoor workers in South Africa, and construction workers and work site supervisors in New Zealand. We found scaling behaviour in all the analysed pUVR data sets. We found that the observed scaling changes from uncorrelated to long-range correlated with increasing duration of sun exposure. Peaks in the WT spectra that we found suggest the existence of characteristic times in sun exposure behaviour that were to some extent universal across our data set. Our study also showed that WT measures enable group classification, as well as distinction between individual UVR exposures, otherwise unattainable by conventional statistical methods.",
publisher = "Nature Publishing Group, New York",
journal = "Journal of Exposure Science and Environmental Epidemiology",
title = "Novel approach to analysing large data sets of personal sun exposure measurements",
volume = "26",
number = "6",
pages = "613-620",
doi = "10.1038/jes.2016.43"
}

Blesić, S., Stratimirović, Đ., Ajtić, J., Wright, C.,& Allen, M. W.. (2016). Novel approach to analysing large data sets of personal sun exposure measurements. in Journal of Exposure Science and Environmental Epidemiology
Nature Publishing Group, New York., 26(6), 613-620.
https://doi.org/10.1038/jes.2016.43

Blesić S, Stratimirović Đ, Ajtić J, Wright C, Allen MW. Novel approach to analysing large data sets of personal sun exposure measurements. in Journal of Exposure Science and Environmental Epidemiology. 2016;26(6):613-620.
doi:10.1038/jes.2016.43 .

Blesić, Suzana, Stratimirović, Đorđe, Ajtić, Jelena, Wright, Caradee, Allen, Martin W., "Novel approach to analysing large data sets of personal sun exposure measurements" in Journal of Exposure Science and Environmental Epidemiology, 26, no. 6 (2016):613-620,
https://doi.org/10.1038/jes.2016.43 . .