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Indoor radon concentrations in kindergartens in three Bulgarian districts
This article examines the results of a study of radon concentrations in kindergartens in three districts of north-western Bulgaria. For the period from December 2019 to May 2020, passive radon measurements were accomplished in 1490 premises of 130 kindergartens. The highest arithmetic mean (AM) value of 219 Bq m-3 and geometric mean (GM) value of 156 Bq m-3 radon concentration were found in the state kindergartens of the Vratsa district. The radon values for the remaining two districts are as follows: Lovech-AM = 156 Bq m-3 and GM = 114 Bq m-3; Montana-AM = 125 Bq m-3 and GM = 88 Bq m-3. The effects of various factors on t...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Nina Chobanova Bistra Kunovska Desislava Djunakova Jana Djounova Zdenka Stojanovska Antoaneta Angelova Kremena Ivanova Source Type: research

Recall of residential history and dietary habits during pregnancy and lactation in the distant past: reliability of questionnaire-based radiation doses for persons exposed in utero and early life
This study evaluates the reliability of information obtained by standardized questionnaires used in by personal interviews for estimation of radiation thyroid doses of 1065 individuals in the Belarusian cohort of individuals who were exposed in utero and early life following the Chernobyl accident in April 1986. Data from two interviews conducted in 2012-2017 and in 2018-2022 with mothers, who were pregnant or gave birth shortly after the Chernobyl accident, were analysed. The most reliable answers dealt with various attributes related to residential history. In contrast, the reliability of answers regarding consumption ra...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Vladimir Drozdovitch Tatiana Kukhta Victor Minenko Sergey Trofimik Ilya Veyalkin Vasilina Yauseyenka Kiyohiko Mabuchi Alexander Rozhko Source Type: research

Indoor radon concentrations in kindergartens in three Bulgarian districts
This article examines the results of a study of radon concentrations in kindergartens in three districts of north-western Bulgaria. For the period from December 2019 to May 2020, passive radon measurements were accomplished in 1490 premises of 130 kindergartens. The highest arithmetic mean (AM) value of 219 Bq m-3 and geometric mean (GM) value of 156 Bq m-3 radon concentration were found in the state kindergartens of the Vratsa district. The radon values for the remaining two districts are as follows: Lovech-AM = 156 Bq m-3 and GM = 114 Bq m-3; Montana-AM = 125 Bq m-3 and GM = 88 Bq m-3. The effects of various factors on t...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Nina Chobanova Bistra Kunovska Desislava Djunakova Jana Djounova Zdenka Stojanovska Antoaneta Angelova Kremena Ivanova Source Type: research

Recall of residential history and dietary habits during pregnancy and lactation in the distant past: reliability of questionnaire-based radiation doses for persons exposed in utero and early life
This study evaluates the reliability of information obtained by standardized questionnaires used in by personal interviews for estimation of radiation thyroid doses of 1065 individuals in the Belarusian cohort of individuals who were exposed in utero and early life following the Chernobyl accident in April 1986. Data from two interviews conducted in 2012-2017 and in 2018-2022 with mothers, who were pregnant or gave birth shortly after the Chernobyl accident, were analysed. The most reliable answers dealt with various attributes related to residential history. In contrast, the reliability of answers regarding consumption ra...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Vladimir Drozdovitch Tatiana Kukhta Victor Minenko Sergey Trofimik Ilya Veyalkin Vasilina Yauseyenka Kiyohiko Mabuchi Alexander Rozhko Source Type: research

Indoor radon concentrations in kindergartens in three Bulgarian districts
This article examines the results of a study of radon concentrations in kindergartens in three districts of north-western Bulgaria. For the period from December 2019 to May 2020, passive radon measurements were accomplished in 1490 premises of 130 kindergartens. The highest arithmetic mean (AM) value of 219 Bq m-3 and geometric mean (GM) value of 156 Bq m-3 radon concentration were found in the state kindergartens of the Vratsa district. The radon values for the remaining two districts are as follows: Lovech-AM = 156 Bq m-3 and GM = 114 Bq m-3; Montana-AM = 125 Bq m-3 and GM = 88 Bq m-3. The effects of various factors on t...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Nina Chobanova Bistra Kunovska Desislava Djunakova Jana Djounova Zdenka Stojanovska Antoaneta Angelova Kremena Ivanova Source Type: research

Recall of residential history and dietary habits during pregnancy and lactation in the distant past: reliability of questionnaire-based radiation doses for persons exposed in utero and early life
This study evaluates the reliability of information obtained by standardized questionnaires used in by personal interviews for estimation of radiation thyroid doses of 1065 individuals in the Belarusian cohort of individuals who were exposed in utero and early life following the Chernobyl accident in April 1986. Data from two interviews conducted in 2012-2017 and in 2018-2022 with mothers, who were pregnant or gave birth shortly after the Chernobyl accident, were analysed. The most reliable answers dealt with various attributes related to residential history. In contrast, the reliability of answers regarding consumption ra...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Vladimir Drozdovitch Tatiana Kukhta Victor Minenko Sergey Trofimik Ilya Veyalkin Vasilina Yauseyenka Kiyohiko Mabuchi Alexander Rozhko Source Type: research

Indoor radon concentrations in kindergartens in three Bulgarian districts
This article examines the results of a study of radon concentrations in kindergartens in three districts of north-western Bulgaria. For the period from December 2019 to May 2020, passive radon measurements were accomplished in 1490 premises of 130 kindergartens. The highest arithmetic mean (AM) value of 219 Bq m-3 and geometric mean (GM) value of 156 Bq m-3 radon concentration were found in the state kindergartens of the Vratsa district. The radon values for the remaining two districts are as follows: Lovech-AM = 156 Bq m-3 and GM = 114 Bq m-3; Montana-AM = 125 Bq m-3 and GM = 88 Bq m-3. The effects of various factors on t...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Nina Chobanova Bistra Kunovska Desislava Djunakova Jana Djounova Zdenka Stojanovska Antoaneta Angelova Kremena Ivanova Source Type: research

Recall of residential history and dietary habits during pregnancy and lactation in the distant past: reliability of questionnaire-based radiation doses for persons exposed in utero and early life
This study evaluates the reliability of information obtained by standardized questionnaires used in by personal interviews for estimation of radiation thyroid doses of 1065 individuals in the Belarusian cohort of individuals who were exposed in utero and early life following the Chernobyl accident in April 1986. Data from two interviews conducted in 2012-2017 and in 2018-2022 with mothers, who were pregnant or gave birth shortly after the Chernobyl accident, were analysed. The most reliable answers dealt with various attributes related to residential history. In contrast, the reliability of answers regarding consumption ra...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Vladimir Drozdovitch Tatiana Kukhta Victor Minenko Sergey Trofimik Ilya Veyalkin Vasilina Yauseyenka Kiyohiko Mabuchi Alexander Rozhko Source Type: research

Indoor radon concentrations in kindergartens in three Bulgarian districts
This article examines the results of a study of radon concentrations in kindergartens in three districts of north-western Bulgaria. For the period from December 2019 to May 2020, passive radon measurements were accomplished in 1490 premises of 130 kindergartens. The highest arithmetic mean (AM) value of 219 Bq m-3 and geometric mean (GM) value of 156 Bq m-3 radon concentration were found in the state kindergartens of the Vratsa district. The radon values for the remaining two districts are as follows: Lovech-AM = 156 Bq m-3 and GM = 114 Bq m-3; Montana-AM = 125 Bq m-3 and GM = 88 Bq m-3. The effects of various factors on t...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Nina Chobanova Bistra Kunovska Desislava Djunakova Jana Djounova Zdenka Stojanovska Antoaneta Angelova Kremena Ivanova Source Type: research

Recall of residential history and dietary habits during pregnancy and lactation in the distant past: reliability of questionnaire-based radiation doses for persons exposed in utero and early life
This study evaluates the reliability of information obtained by standardized questionnaires used in by personal interviews for estimation of radiation thyroid doses of 1065 individuals in the Belarusian cohort of individuals who were exposed in utero and early life following the Chernobyl accident in April 1986. Data from two interviews conducted in 2012-2017 and in 2018-2022 with mothers, who were pregnant or gave birth shortly after the Chernobyl accident, were analysed. The most reliable answers dealt with various attributes related to residential history. In contrast, the reliability of answers regarding consumption ra...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Vladimir Drozdovitch Tatiana Kukhta Victor Minenko Sergey Trofimik Ilya Veyalkin Vasilina Yauseyenka Kiyohiko Mabuchi Alexander Rozhko Source Type: research

Indoor radon concentrations in kindergartens in three Bulgarian districts
This article examines the results of a study of radon concentrations in kindergartens in three districts of north-western Bulgaria. For the period from December 2019 to May 2020, passive radon measurements were accomplished in 1490 premises of 130 kindergartens. The highest arithmetic mean (AM) value of 219 Bq m-3 and geometric mean (GM) value of 156 Bq m-3 radon concentration were found in the state kindergartens of the Vratsa district. The radon values for the remaining two districts are as follows: Lovech-AM = 156 Bq m-3 and GM = 114 Bq m-3; Montana-AM = 125 Bq m-3 and GM = 88 Bq m-3. The effects of various factors on t...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Nina Chobanova Bistra Kunovska Desislava Djunakova Jana Djounova Zdenka Stojanovska Antoaneta Angelova Kremena Ivanova Source Type: research

Recall of residential history and dietary habits during pregnancy and lactation in the distant past: reliability of questionnaire-based radiation doses for persons exposed in utero and early life
This study evaluates the reliability of information obtained by standardized questionnaires used in by personal interviews for estimation of radiation thyroid doses of 1065 individuals in the Belarusian cohort of individuals who were exposed in utero and early life following the Chernobyl accident in April 1986. Data from two interviews conducted in 2012-2017 and in 2018-2022 with mothers, who were pregnant or gave birth shortly after the Chernobyl accident, were analysed. The most reliable answers dealt with various attributes related to residential history. In contrast, the reliability of answers regarding consumption ra...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Vladimir Drozdovitch Tatiana Kukhta Victor Minenko Sergey Trofimik Ilya Veyalkin Vasilina Yauseyenka Kiyohiko Mabuchi Alexander Rozhko Source Type: research

Indoor radon concentrations in kindergartens in three Bulgarian districts
This article examines the results of a study of radon concentrations in kindergartens in three districts of north-western Bulgaria. For the period from December 2019 to May 2020, passive radon measurements were accomplished in 1490 premises of 130 kindergartens. The highest arithmetic mean (AM) value of 219 Bq m-3 and geometric mean (GM) value of 156 Bq m-3 radon concentration were found in the state kindergartens of the Vratsa district. The radon values for the remaining two districts are as follows: Lovech-AM = 156 Bq m-3 and GM = 114 Bq m-3; Montana-AM = 125 Bq m-3 and GM = 88 Bq m-3. The effects of various factors on t...
Source: Radiation and Environmental Biophysics - August 4, 2023 Category: Physics Authors: Nina Chobanova Bistra Kunovska Desislava Djunakova Jana Djounova Zdenka Stojanovska Antoaneta Angelova Kremena Ivanova Source Type: research

Mapping in a radon-prone area in Adamawa region, Cameroon, by measurement of radon activity concentration in soil
Radiat Environ Biophys. 2023 Aug 3. doi: 10.1007/s00411-023-01042-3. Online ahead of print.ABSTRACTThe radon-prone area of the Adamawa region in Cameroon is characterized by high natural radiation background resulting from the high concentrations of radium-226, thorium-232, and indoor radon. To produce a radon-risk map, radon measurements in soil were carried out in the city of Ngaoundere. The radon activity concentration in soil gas ranged from 256 to 166 kBq m-3 with a mean of 80 kBq m-3 and a standard deviation of 38 kBq m-3. The area is mostly classified as high risk (80%) according to the Swedish classification, and 2...
Source: Radiation and Environmental Biophysics - August 3, 2023 Category: Physics Authors: Soumayah Bachirou None Sa ïdou Chutima Kranrod Joseph Emmanuel Ndjana Nkoulou Ii Daniel Bongue Hamadou Yerima Abba Masahiro Hosoda Moise Godfroy Kwato Njock Shinji Tokonami Source Type: research

Mapping in a radon-prone area in Adamawa region, Cameroon, by measurement of radon activity concentration in soil
Radiat Environ Biophys. 2023 Aug 3. doi: 10.1007/s00411-023-01042-3. Online ahead of print.ABSTRACTThe radon-prone area of the Adamawa region in Cameroon is characterized by high natural radiation background resulting from the high concentrations of radium-226, thorium-232, and indoor radon. To produce a radon-risk map, radon measurements in soil were carried out in the city of Ngaoundere. The radon activity concentration in soil gas ranged from 256 to 166 kBq m-3 with a mean of 80 kBq m-3 and a standard deviation of 38 kBq m-3. The area is mostly classified as high risk (80%) according to the Swedish classification, and 2...
Source: Radiation and Environmental Biophysics - August 3, 2023 Category: Physics Authors: Soumayah Bachirou None Sa ïdou Chutima Kranrod Joseph Emmanuel Ndjana Nkoulou Ii Daniel Bongue Hamadou Yerima Abba Masahiro Hosoda Moise Godfroy Kwato Njock Shinji Tokonami Source Type: research