TY  - JOUR
AU  - Todorović, Dragana
AU  - Popovic, D
AU  - Djuric, G
AU  - Radenković, Mirjana
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2860
AB  - Be-7 to Pb-210 concentration ratios in ground level air on two monitoring stations (MS1 and MS2) in Belgrade area were determined from 1996 to 2001. The average monthly concentrations of Be-7 in ground level air were in the range of 0.6-18.3 mBq/m(3) and exhibited one or two summer/early fall maxims and one minimum in winter. The maximum concentrations for Pb-210 were generally observed in the fall, with the average concentrations in the range of 1.09 x 10(-4) to 30.9 X 10(-4) Bq/m(3). The Be-7/Pb-210 ratios were in the range of 1.7-12.7 (MS1) and 1.8-11.3 (MS2), with summer maxims and late fall/winter minimums. The mean Radionuclides Loading Indices values approach zero except for 1996/1997 (MS1) and 2001 (MS2) due to higher concentrations of Be-7 and Pb-210. The mean monthly concentrations of both radionuclides exhibited lognormal distributions. There is significant correlation between the Be-7/Pb-210 activities ratio and the air stability classes A+B+C for both monitoring stations (correlation coefficients 0.61-0.65), and no correlation with D class and E+F classes. Correlation was found between the activity of Be-7 and air stability classes A+B+C (0.46-0.68), and E+F (0.38 for MS1), while for Pb-210, a moderate correlation (0.38-0.40) was found with the E+F air stability classes. (C) 2004 Published by Elsevier Ltd.
T2  - Journal of Environmental Radioactivity
T1  - Be-7 to Pb-210 concentration ratio in ground level air in Belgrade area
VL  - 79
IS  - 3
SP  - 297
EP  - 307
DO  - 10.1016/j.jenvard.2004.08.003
ER  - 

@article{
author = "Todorović, Dragana and Popovic, D and Djuric, G and Radenković, Mirjana",
year = "2005",
abstract = "Be-7 to Pb-210 concentration ratios in ground level air on two monitoring stations (MS1 and MS2) in Belgrade area were determined from 1996 to 2001. The average monthly concentrations of Be-7 in ground level air were in the range of 0.6-18.3 mBq/m(3) and exhibited one or two summer/early fall maxims and one minimum in winter. The maximum concentrations for Pb-210 were generally observed in the fall, with the average concentrations in the range of 1.09 x 10(-4) to 30.9 X 10(-4) Bq/m(3). The Be-7/Pb-210 ratios were in the range of 1.7-12.7 (MS1) and 1.8-11.3 (MS2), with summer maxims and late fall/winter minimums. The mean Radionuclides Loading Indices values approach zero except for 1996/1997 (MS1) and 2001 (MS2) due to higher concentrations of Be-7 and Pb-210. The mean monthly concentrations of both radionuclides exhibited lognormal distributions. There is significant correlation between the Be-7/Pb-210 activities ratio and the air stability classes A+B+C for both monitoring stations (correlation coefficients 0.61-0.65), and no correlation with D class and E+F classes. Correlation was found between the activity of Be-7 and air stability classes A+B+C (0.46-0.68), and E+F (0.38 for MS1), while for Pb-210, a moderate correlation (0.38-0.40) was found with the E+F air stability classes. (C) 2004 Published by Elsevier Ltd.",
journal = "Journal of Environmental Radioactivity",
title = "Be-7 to Pb-210 concentration ratio in ground level air in Belgrade area",
volume = "79",
number = "3",
pages = "297-307",
doi = "10.1016/j.jenvard.2004.08.003"
}

Todorović, D., Popovic, D., Djuric, G.,& Radenković, M.. (2005). Be-7 to Pb-210 concentration ratio in ground level air in Belgrade area. in Journal of Environmental Radioactivity, 79(3), 297-307.
https://doi.org/10.1016/j.jenvard.2004.08.003

Todorović D, Popovic D, Djuric G, Radenković M. Be-7 to Pb-210 concentration ratio in ground level air in Belgrade area. in Journal of Environmental Radioactivity. 2005;79(3):297-307.
doi:10.1016/j.jenvard.2004.08.003 .

Todorović, Dragana, Popovic, D, Djuric, G, Radenković, Mirjana, "Be-7 to Pb-210 concentration ratio in ground level air in Belgrade area" in Journal of Environmental Radioactivity, 79, no. 3 (2005):297-307,
https://doi.org/10.1016/j.jenvard.2004.08.003 . .

TY  - JOUR
AU  - Todorović, Dragana
AU  - Popovic, D
AU  - Djuric, G
AU  - Radenković, Mirjana
PY  - 2000
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2350
AB  - Concentrations of Pb-210 in ground level air in the city area (Belgrade, Central Serbia) were measured in the period from 1985 to 1996. The activity of Pb-210 in air filters was determined on a HPGe detector by standard gamma spectrometry. Total standard error of the method was estimated to be below 25%. The average monthly concentrations of Pb-210 in the ground level air in the period from 1985 to 1996 were in the range of 0.30-3.17 mBq m(-3) with the maxima in fall-winter periods and minimums in springs and early summers. The seasonal indices were 1.12-1.59 for fall-winter and 0.77-0.92 for spring-summer periods. The ratios of maximum-to-minimum concentrations in each year were relatively stable over the period, with slight increase in 1985, 1989 and 1995. The investigations are part of the long-term measurements of natural and man-made radionuclides in the ground-level air in the region. (C) 2000 Elsevier Science Ltd. All rights reserved.
T2  - Atmospheric Environment
T1  - Pb-210 in ground-level air in Belgrade city area
VL  - 34
IS  - 19
SP  - 3245
EP  - 3248
DO  - 10.1016/S1352-2310(99)00500-2
ER  - 

@article{
author = "Todorović, Dragana and Popovic, D and Djuric, G and Radenković, Mirjana",
year = "2000",
abstract = "Concentrations of Pb-210 in ground level air in the city area (Belgrade, Central Serbia) were measured in the period from 1985 to 1996. The activity of Pb-210 in air filters was determined on a HPGe detector by standard gamma spectrometry. Total standard error of the method was estimated to be below 25%. The average monthly concentrations of Pb-210 in the ground level air in the period from 1985 to 1996 were in the range of 0.30-3.17 mBq m(-3) with the maxima in fall-winter periods and minimums in springs and early summers. The seasonal indices were 1.12-1.59 for fall-winter and 0.77-0.92 for spring-summer periods. The ratios of maximum-to-minimum concentrations in each year were relatively stable over the period, with slight increase in 1985, 1989 and 1995. The investigations are part of the long-term measurements of natural and man-made radionuclides in the ground-level air in the region. (C) 2000 Elsevier Science Ltd. All rights reserved.",
journal = "Atmospheric Environment",
title = "Pb-210 in ground-level air in Belgrade city area",
volume = "34",
number = "19",
pages = "3245-3248",
doi = "10.1016/S1352-2310(99)00500-2"
}

Todorović, D., Popovic, D., Djuric, G.,& Radenković, M.. (2000). Pb-210 in ground-level air in Belgrade city area. in Atmospheric Environment, 34(19), 3245-3248.
https://doi.org/10.1016/S1352-2310(99)00500-2

Todorović D, Popovic D, Djuric G, Radenković M. Pb-210 in ground-level air in Belgrade city area. in Atmospheric Environment. 2000;34(19):3245-3248.
doi:10.1016/S1352-2310(99)00500-2 .

Todorović, Dragana, Popovic, D, Djuric, G, Radenković, Mirjana, "Pb-210 in ground-level air in Belgrade city area" in Atmospheric Environment, 34, no. 19 (2000):3245-3248,
https://doi.org/10.1016/S1352-2310(99)00500-2 . .

TY  - JOUR
AU  - Todorović, Dragana
AU  - Popovic, D
AU  - Djuric, G
PY  - 1999
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2222
AB  - Concentrations of Be-7 and Cs-137 in ground level air in the city area (Belgrade, central Serbia) were determined in the period from 1991-1996, The average monthly concentrations of Be-7 in ground level air were in the range of 2-7 mBq/m(3) with pronounced one or two maxims in summer or early fall and a minimum in winter; The average air concentrations for Cs-137 were from 0.5-8.5 x 10-5 Bq/m(3), with a spread maximum in the spring-summer period and a pronounced maximum during the winter. A general increase in Be-7 and Cs-137 concentrations during 1993 was recorded. The maximum seasonal indices were 1.3 for Be-7 (summers) and 2.7 (late springs and early summers) and 3,4 (winters) for Cs-137. No correlation with the amount of precipitation and Cs-137 concentrations in air was determined, while the washout effect of rainfalls seems to be more closely related with variations in Be-7 concentrations. (C) 1999 Elsevier Science Ltd.
T2  - Environment International
T1  - Concentration measurements of Be-7 and Cs-137 in ground level air in the Belgrade city area
VL  - 25
IS  - 1
SP  - 59
EP  - 66
DO  - 10.1016/S0160-4120(98)00099-3
ER  - 

@article{
author = "Todorović, Dragana and Popovic, D and Djuric, G",
year = "1999",
abstract = "Concentrations of Be-7 and Cs-137 in ground level air in the city area (Belgrade, central Serbia) were determined in the period from 1991-1996, The average monthly concentrations of Be-7 in ground level air were in the range of 2-7 mBq/m(3) with pronounced one or two maxims in summer or early fall and a minimum in winter; The average air concentrations for Cs-137 were from 0.5-8.5 x 10-5 Bq/m(3), with a spread maximum in the spring-summer period and a pronounced maximum during the winter. A general increase in Be-7 and Cs-137 concentrations during 1993 was recorded. The maximum seasonal indices were 1.3 for Be-7 (summers) and 2.7 (late springs and early summers) and 3,4 (winters) for Cs-137. No correlation with the amount of precipitation and Cs-137 concentrations in air was determined, while the washout effect of rainfalls seems to be more closely related with variations in Be-7 concentrations. (C) 1999 Elsevier Science Ltd.",
journal = "Environment International",
title = "Concentration measurements of Be-7 and Cs-137 in ground level air in the Belgrade city area",
volume = "25",
number = "1",
pages = "59-66",
doi = "10.1016/S0160-4120(98)00099-3"
}

Todorović, D., Popovic, D.,& Djuric, G.. (1999). Concentration measurements of Be-7 and Cs-137 in ground level air in the Belgrade city area. in Environment International, 25(1), 59-66.
https://doi.org/10.1016/S0160-4120(98)00099-3

Todorović D, Popovic D, Djuric G. Concentration measurements of Be-7 and Cs-137 in ground level air in the Belgrade city area. in Environment International. 1999;25(1):59-66.
doi:10.1016/S0160-4120(98)00099-3 .

Todorović, Dragana, Popovic, D, Djuric, G, "Concentration measurements of Be-7 and Cs-137 in ground level air in the Belgrade city area" in Environment International, 25, no. 1 (1999):59-66,
https://doi.org/10.1016/S0160-4120(98)00099-3 . .