[The effect of gamma irradiation on the strain W of Tetrahymena pyriformis].

It the present study the effects of gamma-radiation at doses of 102.1 Gy-1,633.4 Gy were investigated as exerted on the protozoan Tetrahymena pyriformis W strain.

[Contamination of food with cesium radionuclides].

Specific activities of 134Cs, 137Cs were investigated and compared in canned meat products, pork, beef, poultry, venison, as well as in raw cow milk, milk products and milk replacers. Increased specific activities of cesium radionuclides in canned meat products were found up to 70 Bq.kg-1 in 1986, up to 150 Bq.

[The effect of natural zeolite on the excretion and distribution of radiocesium in rats].

Observation was made of the influence of natural zeolite (clinoptilolite) supplement in food on 134Cs excretion and distribution after oral internal contamination of laboratory brown rats. After diet administration with 2.5, 5, and 10% zeolite supplement the 134Cs elimination in droppings increased and the radionuclide deposition in liver, kidneys and femoral musculature decreased.

[A biological method for the determination of mycotoxins--Tetrahymena pyriformis].

The toxic action of selected mycotoxins on a biological subject was tested in the protozoan Tetrahymena pyriformis. The following toxins were tested: toxin T-2 at doses from 1.52 micrograms to 100.