[Experimental study of 241Am transfer from herbal food to organs and tissues of crucian carp].

Freshwater fishes (Carassius auratus gibelio, crucian carp) were fed through catheter with homogenized biomass of submerged macrophytes labeled with transuranium element 241Am. The intensity of excretion of americium and its accumulation in organs and tissues of fishes were investigated. The highest release of americium (up to 70%) was recorded on the second day after feeding.

[The accumulation of the technogenic radionuclides by mushrooms in the area affected by the activity of the Krasnoyarsk mining-and-chemical industrial complex].

The radionuclide content was measured in mushrooms collected in different sites situated in the zone of the radiation influence on the Mining-and-Chemical Combine at Zheleznogorsk and on the control site, near Krasnoyarsk, in 2002-2004. The analytical investigations of fruiting bodies of 12 mushroom species have revealed three gamma-emitting radionuclides: 7Be, 40K (natural) and 137Cs (artificial). It was found that only three species contain 7Be; activity concentration of 40K is not species- and site-dependent, averaging 1600 Bq/kg.