[Application of chemiluminescent technique for determination of Daphnia magna sensitivity to various types of toxic agents].

The character and intensity of activated chemiluminescence of Daphnia living medium are investigated depending on the effect on them of various concentration different in nature toxic substances, such, as potassium bichromate, methomyl and tween-80. It is shown, that the toxic influence of these agents can be defined by registration of stimulating effect of Daphnia's exometabolites on the process of chemiluminescence. The sensitivity of the method makes: for potassium chromate--0.

[Enzymatic sensor for determing triglycerides].

An enzymatic sensor based on ion selective field effect transistors was developed for the determination of triacylglyceroles in the range of concentrations from 0.1 to 2 mM. It was show that the sensitivity of the sensor was equal to 0.

[Sterols of horse erythrocytes].

Sterols of the whole erythrocytes, hemoglobin, membranes and their protein fractions were studied. Erythrocytes and their components were established to contain, besides cholesterol, other substances of the sterol nature. Cholesterol, 7-dehydrocholesterol and other substances of the cholesterol series are practically completely linked with the lipoproteid fractions of the erythrocyte membrane whereas all sterols found in the native erythrocytes in negligible amounts are bound with hemoglobin.