L. B. Bratkovskaya

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In the growing culture of the thermophilic alga Chlorella pyrenoidosa Chick S-39, the amount of extracellular carbohydrates in the medium reached 5–17% of their content in the cells and 20–40% of the total content of extracellular organic matter. Experiments with the enrichment and synchronous algal cultures showed that the accumulation of extracellular(More)
The effects of alamethicin on the membrane barrier function of rabbit erythrocytes, human platelets and sarcoplasmic reticulum vesicles, as well as on that of brain microsomes and liver mitochondria of the rat were compared. An upset of the barrier function was observed for plasma membranes of brain microsomes as well as for erythrocyte and platelet(More)
Activity of the enzyme systems protecting membrane structures of photoreceptor cells Ithe outer and inner segments of the retinal rods) against active forms of oxygen (superoxide dismutase) and lipid peroxide (glutathione peroxidase, glutathione reductase) was shown to be low. At the same time a high concentration of α-tocopherol (vitamin E) was(More)
115 The daphnia test, based on an assessment of sur vival, fecundity, and quality of progeny in the investi gated aqueous samples is one of the main tests used for setting the quality of natural and waste waters in many countries around the world (US. EPA, 1994). This is due to fact that daphnia, an important part of freshwa ter zooplankton, have a short(More)
Reduced intensity of delayed fluorescence of chlorophyll and suppressed growth recorded in an experimental population of Scenedesmus quadricauda under the influence of pyrocatechol demonstrate reduction in efficiency of light reactions of photosynthesis, which, in turn, determines deterioration of algae productivity.
A decrease in the content of vitamin E (tocopherols) in biological membranes leads to their injury [3]. Tocopherols, as minor lipid components of biomembranes, are considered to perform mainly the function of antloxldants, capable of interacting with free radicals of llplds [15] and with singlet molecular oxygen [8]. At the same time, tocopherols are known(More)
The effect of a dangerous toxic substance, methylmercury, on light dependence curves of chlorophyll fluorescence in Chlamydomonas moewusii was studied. We found low concentration of methylmercury (10–7 M) to cause a decrease in the relative rate of the non-cyclic electron transport activity of PS2, a decline in the maximum utilization of light energy (α),(More)
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