Data/hora: 06/06/2024 03:35:48

Provedor de dados: 	52	
País: 	Brazil	
Título: 	40K, 226Ra AND 228Ra SERIES IN BOVINE AND POULTRY FEED AND IN DICALCIUM PHOSPHATE (DCP) SAMPLES BY GAMMA-RAY SPECTROMETRY	
Autores: 	Luz Filho,Isaias Venancio da; Scheibel,Viviane; Appoloni,Carlos Roberto.	
Data: 	2016-01-01	
Ano: 	2016	
Palavras-chave: 	Gamma Ray Spectrometry; Natural radioactivity; Animal Feed; Dicalcium phosphate (DCP); Phosphate fertilizers.	
Resumo: 	The aim of this study is to determine the amounts of radionuclides' activity present in samples of feed for young and adult chicken and feed for dairy and beef cattle, as well as in dicalcium phosphate (DCP) (CaHPO4), used as a nutritional supplement for animal feed. Radioactivity in these samples is due to the presence of the 238U and 232Th radioactive series, as well as their daughter. In addition, as it is for environmental samples, the activity of 40K should be an important source of radioactivity in all analyzed samples. Gamma rays were measured using a standard spectroscopy system, with a high-resolution HPGe detector. Measured activities in feed samples ranged from 0.23 to 1.51 Bq.kg-1, 0.67 to 4.21 Bq.kg-1, 0.29 to 1.63 Bq.kg-1 and 236 to 402 Bq.kg-1 for 226Ra, 228 Ra, 228 Th and 40K, respectively. Measured activities in DCP samples were 46.6 Bq.kg-1, 83 Bq.kg-1, 4.20 Bq.kg-1 and 16.61 Bq.kg-1 for 40 K, 226 Ra, 228 Ra and 228 Th, respectively. Although 40K activity has reached hundreds of Becquerel in feed samples, it should not represent a risk to human health, not even to animals, since potassium is an essential mineral to living organisms.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100506	
Editor: 	Instituto de Tecnologia do Paraná - Tecpar	
Relação: 	10.1590/1678-4324-2016150666	
Formato: 	text/html	
Fonte: 	Brazilian Archives of Biology and Technology  v.59 2016	
Fonte: 	info:eu-repo/semantics/openAccess