Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Distribution and possible dietary intake of radioactive
There is scarcity of data on contamination with radiocesium ( 134/137 Cs) of edible mushrooms from the Southwestern Asia. This study aimed to get insight into activity concentration of artificial nuclides 134/137 Cs and natural 40 K and 226 Ra in mushrooms from Yunnan province, which is major producer in China. The specimens of pantropical mushroom Macrocybe gigantea were collected from the wild and from a farm across Yunnan land in 2012-2013 and analyzed using gamma spectrometry with hyperpure germanium coaxial detector (HPGe). M. gigantea showed low activity concentrations of 137 Cs (median value for dehydrated caps was 4.5 Bq kg −1 and 5.4 Bq kg −1 for stipes) while 134 Cs was not detected. Natural radionuclide 40 K showed 2-3 orders of magnitude greater activity concentration compared to artificial 137 Cs in M. gigantea. The activity concentrations of 226 Ra from uranium and radium decay series for most of the consignments of M. gigantea examined were below the method's limit of detection. The nominal effective dose equivalent for the Yunnan people from the dietary intake of 137 Cs was assessed to be below 0.01 μSv per annum on the average, and that from 40 K to be below 0.1 μSv per annum. Data available for the first time on activity concentrations of 137 Cs in wild-grown saprobic mushroom from this region of Asia suggest low pollution with radiocesium from fallout there. Hence, the likely health risks from intake of 137 Cs from cooked M. gigantea are in practice of mushrooms absent for human consumers there. Because of abundance of mushrooms in Yunnan and high significance of the region as producer and exporter a wider study using many species is necessary to fill a gap on possible radioactive contamination and risk to mushroom consumers.
Distribution and possible dietary intake of radioactive
There is scarcity of data on contamination with radiocesium ( 134/137 Cs) of edible mushrooms from the Southwestern Asia. This study aimed to get insight into activity concentration of artificial nuclides 134/137 Cs and natural 40 K and 226 Ra in mushrooms from Yunnan province, which is major producer in China. The specimens of pantropical mushroom Macrocybe gigantea were collected from the wild and from a farm across Yunnan land in 2012-2013 and analyzed using gamma spectrometry with hyperpure germanium coaxial detector (HPGe). M. gigantea showed low activity concentrations of 137 Cs (median value for dehydrated caps was 4.5 Bq kg −1 and 5.4 Bq kg −1 for stipes) while 134 Cs was not detected. Natural radionuclide 40 K showed 2-3 orders of magnitude greater activity concentration compared to artificial 137 Cs in M. gigantea. The activity concentrations of 226 Ra from uranium and radium decay series for most of the consignments of M. gigantea examined were below the method's limit of detection. The nominal effective dose equivalent for the Yunnan people from the dietary intake of 137 Cs was assessed to be below 0.01 μSv per annum on the average, and that from 40 K to be below 0.1 μSv per annum. Data available for the first time on activity concentrations of 137 Cs in wild-grown saprobic mushroom from this region of Asia suggest low pollution with radiocesium from fallout there. Hence, the likely health risks from intake of 137 Cs from cooked M. gigantea are in practice of mushrooms absent for human consumers there. Because of abundance of mushrooms in Yunnan and high significance of the region as producer and exporter a wider study using many species is necessary to fill a gap on possible radioactive contamination and risk to mushroom consumers.
Distribution and possible dietary intake of radioactive
Falandysz, Jerzy (Autor:in) / Zhang, Ji / Zalewska, Tamara / Apanel, Anna / Wang, Yuanzhong / Wiejak, Anna
2015
Aufsatz (Zeitschrift)
Englisch
USA , Recht , Zeitschrift , Datenverarbeitung
| British Library Online Contents | 2007
| British Library Online Contents | 2008