| transfer across the human gut of environmental plutonium, americium, cobalt, caesium and technetium: studies with cockles (cerastoderma edule) from the irish sea. | our previous studies have indicated lower values of the gut transfer factor ('f1 values') for plutonium and americium in winkles (littorina littorea) than adopted by icrp. the present study was undertaken primarily to investigate whether this observation extends to other species. samples of cockles (carastoderma edule) from ravenglass, cumbria were eaten by volunteers who provided 24 h samples of urine and faeces. urine samples indicated f1 values for cockles which were higher than for winkles; ... | 1998 | 9656190 |