Concentrations of PCB [Polychlorinated Biphenyls] in hair, blood, tissue and excretions of chronically affected cows, fattening bulls and calves. 2. Communication: development of the concentrations of highly chlorinated biphenyls (PCB) in hair, tissues and excretions of chronically affected fattening bulls and dried off cows kept on PCB-free diet

analytical methods animal tissues bifenilos policlorados blood bulls calves chemical contamination contamination chimique dairy cows dry period excretion gain de poids ganancia de peso hair pelo poils polychlorinated biphenyls radiactividad radioactivity sang sangre taureau technique analytique tejidos animales ternero tissu animal toro vacas lecheras veau weight gain