TY  - JOUR
AU  - Lavi, Natan
AU  - Alfassi, Zeev B.
AU  - Drndarski, Nina D.
PY  - 1997
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2050
AB  - In order to measure low-activity radioactive environmental samples, both in liquid and solid phases, the use of Marinelli (reentrant) beakers is recommended. Standards were prepared by mixing of standardized radioactive solutions with CaCO3 of density 1.1 to 1.3 g cm(-3), similar to densities of environmental samples. Measurements of calibrated Marinelli comparator standards on detector surface showed that the dependence of log Eff vs. log E is almost linear in the 120 keV to 1500 keV range. The data can be fitted more accurately by assuming a parabolic correlation (log Eff vs. log E). The validity of these standards was checked by determining the concentration of radio-europium, radio-cesium and Ra-226 in three certified reference standard materials. The results obtained agreed well with the published certified data. The limit of detection for the determination of radio-cesium by gamma-ray spectrometry under the prevailing experimental conditions is 0.1 Bq (2.7 pCi), for 0.5 kg of environmental samples.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Calibration of Marinelli vessels for measurement of radioactive environmental samples
VL  - 385
IS  - 2
SP  - 376
EP  - 380
DO  - 10.1016/S0168-9002(96)01042-X
ER  - 

@article{
author = "Lavi, Natan and Alfassi, Zeev B. and Drndarski, Nina D.",
year = "1997",
abstract = "In order to measure low-activity radioactive environmental samples, both in liquid and solid phases, the use of Marinelli (reentrant) beakers is recommended. Standards were prepared by mixing of standardized radioactive solutions with CaCO3 of density 1.1 to 1.3 g cm(-3), similar to densities of environmental samples. Measurements of calibrated Marinelli comparator standards on detector surface showed that the dependence of log Eff vs. log E is almost linear in the 120 keV to 1500 keV range. The data can be fitted more accurately by assuming a parabolic correlation (log Eff vs. log E). The validity of these standards was checked by determining the concentration of radio-europium, radio-cesium and Ra-226 in three certified reference standard materials. The results obtained agreed well with the published certified data. The limit of detection for the determination of radio-cesium by gamma-ray spectrometry under the prevailing experimental conditions is 0.1 Bq (2.7 pCi), for 0.5 kg of environmental samples.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Calibration of Marinelli vessels for measurement of radioactive environmental samples",
volume = "385",
number = "2",
pages = "376-380",
doi = "10.1016/S0168-9002(96)01042-X"
}

Lavi, N., Alfassi, Z. B.,& Drndarski, N. D.. (1997). Calibration of Marinelli vessels for measurement of radioactive environmental samples. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 385(2), 376-380.
https://doi.org/10.1016/S0168-9002(96)01042-X

Lavi N, Alfassi ZB, Drndarski ND. Calibration of Marinelli vessels for measurement of radioactive environmental samples. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 1997;385(2):376-380.
doi:10.1016/S0168-9002(96)01042-X .

Lavi, Natan, Alfassi, Zeev B., Drndarski, Nina D., "Calibration of Marinelli vessels for measurement of radioactive environmental samples" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 385, no. 2 (1997):376-380,
https://doi.org/10.1016/S0168-9002(96)01042-X . .

TY  - JOUR
AU  - Drndarski, Nina D.
AU  - Miljević, Nada R.
AU  - Golobočanin, Dušan D.
PY  - 1996
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2045
AB  - The distribution of natural radionuclides, K-40, Ra-226 and Th-232, in freshwater sediments and in coal-fired power-plant ash repositories has been tested for lognormality. Thereafter, lognormality for natural radionuclide concentration frequency distribution was accepted with a high probability. The log-normal natural radionuclide distribution in sediments and coal-ash indicated single population groups. The anthropogenic modifications of the natural radionuclide concentrations in the environment are indicated. The adsorbed dose rates, in mGy y(-1), in air from gamma field of the natural radionuclides were calculated.
T2  - Journal of Radioanalytical and Nuclear Chemistry - Letters
T1  - Lognormal distribution of natural radionuclides in freshwater sediments and coal-ash repositories
VL  - 214
IS  - 2
SP  - 95
EP  - 102
DO  - 10.1007/BF02164810
ER  - 

@article{
author = "Drndarski, Nina D. and Miljević, Nada R. and Golobočanin, Dušan D.",
year = "1996",
abstract = "The distribution of natural radionuclides, K-40, Ra-226 and Th-232, in freshwater sediments and in coal-fired power-plant ash repositories has been tested for lognormality. Thereafter, lognormality for natural radionuclide concentration frequency distribution was accepted with a high probability. The log-normal natural radionuclide distribution in sediments and coal-ash indicated single population groups. The anthropogenic modifications of the natural radionuclide concentrations in the environment are indicated. The adsorbed dose rates, in mGy y(-1), in air from gamma field of the natural radionuclides were calculated.",
journal = "Journal of Radioanalytical and Nuclear Chemistry - Letters",
title = "Lognormal distribution of natural radionuclides in freshwater sediments and coal-ash repositories",
volume = "214",
number = "2",
pages = "95-102",
doi = "10.1007/BF02164810"
}

Drndarski, N. D., Miljević, N. R.,& Golobočanin, D. D.. (1996). Lognormal distribution of natural radionuclides in freshwater sediments and coal-ash repositories. in Journal of Radioanalytical and Nuclear Chemistry - Letters, 214(2), 95-102.
https://doi.org/10.1007/BF02164810

Drndarski ND, Miljević NR, Golobočanin DD. Lognormal distribution of natural radionuclides in freshwater sediments and coal-ash repositories. in Journal of Radioanalytical and Nuclear Chemistry - Letters. 1996;214(2):95-102.
doi:10.1007/BF02164810 .

Drndarski, Nina D., Miljević, Nada R., Golobočanin, Dušan D., "Lognormal distribution of natural radionuclides in freshwater sediments and coal-ash repositories" in Journal of Radioanalytical and Nuclear Chemistry - Letters, 214, no. 2 (1996):95-102,
https://doi.org/10.1007/BF02164810 . .

TY  - JOUR
AU  - Drndarski, Nina D.
AU  - Golobočanin, Dušan D.
AU  - Tutunović, Ivana
PY  - 1996
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2012
AB  - Statistical tests were performed on the gamma-spectrometry measurement data obtained during the last decade for the natural radionuclides K-40, Ra-226 and Th-232, in water samples collected from the Danube River, the Sava River and its tributaries, ground waters and artificial lakes. The lognormal radiopotassium distribution indicates a single statistical population. The presence of break points in the frequency distribution plots indicates that data for Ra-226 and Th-232 do not come from a single statistical population. The annual ingestion of K-40, Ra-226 and Th-232 was calculated and expressed in Bq y(-1).
T2  - Journal of Radioanalytical and Nuclear Chemistry - Letters
T1  - Natural radioactivity of fresh waters in Serbia
VL  - 213
IS  - 5
SP  - 361
EP  - 368
DO  - 10.1007/bf02162934
UR  - https://hdl.handle.net/21.15107/rcub_vinar_2012
ER  - 

@article{
author = "Drndarski, Nina D. and Golobočanin, Dušan D. and Tutunović, Ivana",
year = "1996",
abstract = "Statistical tests were performed on the gamma-spectrometry measurement data obtained during the last decade for the natural radionuclides K-40, Ra-226 and Th-232, in water samples collected from the Danube River, the Sava River and its tributaries, ground waters and artificial lakes. The lognormal radiopotassium distribution indicates a single statistical population. The presence of break points in the frequency distribution plots indicates that data for Ra-226 and Th-232 do not come from a single statistical population. The annual ingestion of K-40, Ra-226 and Th-232 was calculated and expressed in Bq y(-1).",
journal = "Journal of Radioanalytical and Nuclear Chemistry - Letters",
title = "Natural radioactivity of fresh waters in Serbia",
volume = "213",
number = "5",
pages = "361-368",
doi = "10.1007/bf02162934",
url = "https://hdl.handle.net/21.15107/rcub_vinar_2012"
}

Drndarski, N. D., Golobočanin, D. D.,& Tutunović, I.. (1996). Natural radioactivity of fresh waters in Serbia. in Journal of Radioanalytical and Nuclear Chemistry - Letters, 213(5), 361-368.
https://doi.org/10.1007/bf02162934
https://hdl.handle.net/21.15107/rcub_vinar_2012

Drndarski ND, Golobočanin DD, Tutunović I. Natural radioactivity of fresh waters in Serbia. in Journal of Radioanalytical and Nuclear Chemistry - Letters. 1996;213(5):361-368.
doi:10.1007/bf02162934
https://hdl.handle.net/21.15107/rcub_vinar_2012 .

Drndarski, Nina D., Golobočanin, Dušan D., Tutunović, Ivana, "Natural radioactivity of fresh waters in Serbia" in Journal of Radioanalytical and Nuclear Chemistry - Letters, 213, no. 5 (1996):361-368,
https://doi.org/10.1007/bf02162934 .,
https://hdl.handle.net/21.15107/rcub_vinar_2012 .

TY  - JOUR
AU  - Drndarski, Nina D.
AU  - Lavi, Natan
PY  - 1996
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1987
AB  - The concentrations of the fission radionuclide Cs-137, an activation radionuclide Cs-134 and the naturally occurring radionuclides K-40, Ra-226 and Th-232 were measured by gamma spectrometry in the sediment and water samples collected from the Grliska artificial lake and its tributaries. The deposition of radiocesium per square meter of sediments ranged from 2799 to 6158 Bq/m(2). The total gamma activity of sediments appeared to be due to all determined radionuclides with a major contribution of the naturally occurring radiopotassium. Activity ratio Cs-134/Cs-137 recalculated to April 1986 showed that radiocesium in the Grliska impoundment environment originated from the Chernobyl fallout. Radionuclide partitioning coefficients were calculated in order to explain their transport/retardation in the Grliska impoundment ecosystem. Copyright (C) 1996 Elsevier Science Ltd
T2  - Water Research
T1  - Radioactivity in sediments from the Grliska impoundment
VL  - 30
IS  - 6
SP  - 1539
EP  - 1542
DO  - 10.1016/0043-1354(96)00010-3
ER  - 

@article{
author = "Drndarski, Nina D. and Lavi, Natan",
year = "1996",
abstract = "The concentrations of the fission radionuclide Cs-137, an activation radionuclide Cs-134 and the naturally occurring radionuclides K-40, Ra-226 and Th-232 were measured by gamma spectrometry in the sediment and water samples collected from the Grliska artificial lake and its tributaries. The deposition of radiocesium per square meter of sediments ranged from 2799 to 6158 Bq/m(2). The total gamma activity of sediments appeared to be due to all determined radionuclides with a major contribution of the naturally occurring radiopotassium. Activity ratio Cs-134/Cs-137 recalculated to April 1986 showed that radiocesium in the Grliska impoundment environment originated from the Chernobyl fallout. Radionuclide partitioning coefficients were calculated in order to explain their transport/retardation in the Grliska impoundment ecosystem. Copyright (C) 1996 Elsevier Science Ltd",
journal = "Water Research",
title = "Radioactivity in sediments from the Grliska impoundment",
volume = "30",
number = "6",
pages = "1539-1542",
doi = "10.1016/0043-1354(96)00010-3"
}

Drndarski, N. D.,& Lavi, N.. (1996). Radioactivity in sediments from the Grliska impoundment. in Water Research, 30(6), 1539-1542.
https://doi.org/10.1016/0043-1354(96)00010-3

Drndarski ND, Lavi N. Radioactivity in sediments from the Grliska impoundment. in Water Research. 1996;30(6):1539-1542.
doi:10.1016/0043-1354(96)00010-3 .

Drndarski, Nina D., Lavi, Natan, "Radioactivity in sediments from the Grliska impoundment" in Water Research, 30, no. 6 (1996):1539-1542,
https://doi.org/10.1016/0043-1354(96)00010-3 . .

TY  - THES
AU  - Drndarski, Nina D.
PY  - 1977
UR  - http://encore.lib.gla.ac.uk/iii/encore/record/C__Rb1628483?lang=eng
UR  - https://inis.iaea.org/search/search.aspx?orig_q=RN:12617669
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7680
AB  - This study relates to two discrete areas of radiocarbon geochemistry: (1) Recent work has questioned the assumed constancy of natural radiocarbon concentrations over short time intervals and annual atmospheric C-14 concentrations have therefore been studied through analysis of single tree rings. (2) In the Clyde sea area a large excess of fossil carbon from fuels and industrial wastes has been deposited, thus diluting natural C-14 concentrations and producing abnormally old ages near surface sediments. Radiocarbon analysis of sediments enables fossil carbon pollution indices to be estimated for the Clyde sea area. In addition, points of radiocarbon inversion in sediment profiles are consistent with commencement of large-scale industrial pollution of the area around 200 years ago. A source of natural fossil carbon in the area is also evident.
T2  - University of Glasgow
T1  - Studies in radiocarbon geochemistry
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7680
ER  - 

@phdthesis{
author = "Drndarski, Nina D.",
year = "1977",
abstract = "This study relates to two discrete areas of radiocarbon geochemistry: (1) Recent work has questioned the assumed constancy of natural radiocarbon concentrations over short time intervals and annual atmospheric C-14 concentrations have therefore been studied through analysis of single tree rings. (2) In the Clyde sea area a large excess of fossil carbon from fuels and industrial wastes has been deposited, thus diluting natural C-14 concentrations and producing abnormally old ages near surface sediments. Radiocarbon analysis of sediments enables fossil carbon pollution indices to be estimated for the Clyde sea area. In addition, points of radiocarbon inversion in sediment profiles are consistent with commencement of large-scale industrial pollution of the area around 200 years ago. A source of natural fossil carbon in the area is also evident.",
journal = "University of Glasgow",
title = "Studies in radiocarbon geochemistry",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7680"
}

Drndarski, N. D.. (1977). Studies in radiocarbon geochemistry. in University of Glasgow.
https://hdl.handle.net/21.15107/rcub_vinar_7680

Drndarski ND. Studies in radiocarbon geochemistry. in University of Glasgow. 1977;.
https://hdl.handle.net/21.15107/rcub_vinar_7680 .

Drndarski, Nina D., "Studies in radiocarbon geochemistry" in University of Glasgow (1977),
https://hdl.handle.net/21.15107/rcub_vinar_7680 .