Scopus, Ostroumov S.A., 73 publications, 18.01.2016. Ecology, environment, water quality, ecotoxicology, biology.
http://5bio5.blogspot.com/2016/01/scopus-ostroumov-sa-73-publications.html
Many of these publications are available online free on ResarchGate;
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http://5bio5.blogspot.com/2016/01/scopus-ostroumov-sa-73-publications.html
Many of these publications are available online free on ResarchGate;
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result list
- 1992We investigated the effect of one of the quaternary ammonia compounds, tetradecyltrimethylammonium bromide, which is found in the water, on leeches and buckwheat shoots. We found that this surfactant affects behavior in leeches and is lethal in high concentrations. We demonstrated that this substance inhibits the growth of shoots. This information may be used in the analysis and evaluation of possible ecological sequelae of the effect of stagnant and polluted waters on agriculture. Comparison of the sensitivity of the two biotests demonstrated that the biotest on leeches was more sensitive under these research conditions.
- 1991A review of some latest works on biological effect of different surfactants and surfactant-pollute aquatic environment on test-organisms is presented. Data on biotesting of aquatic environments containing commercial anionic, nonionic, cationic surfactants and their compositions are considered. A new approach to the problem of quantitative comparison of results from biotestings in different series of experiments is suggested. It is stated that pollution of aquatic environment with surfactants is ecologically more dangerous than it has been previously considered.
- 19890Bioassay of aqueous solutions of the anionic surfactant sulfonol and the pesticide DNOC indicated that both pollutants effectively inhibited the elongation of Sinapis alba seedling; DNOC was the more effective inhibitor. Sinapis alba seedlings appear suitable for bioassay of these pollutants in water bodies.
- 1979BiomembranesNo abstract available
- 1978On the basis of experimental evidence accumulated in studies of coupling and other membranes a theoretical discussion of a "breathing" membrane structure dependent upon a changing transmembrane electrical (electrochemical) gradient is presented. In the case of certain membranes difference of electrical potentials across the membrane (Δψ) is considered as one of important driving forces for some membrane protein folding and/or the arrangement of subunits within some oligomeric proteins. Δψ changes may induce synchronous reversible energetically favourable transitions in the three-dimensional architecture of several spatially separated proteins of the biomembrane. A polyfunctional regulation of levels of activities of spatially separated membrane proteins may be achieved; in some cases alterations of Δψ and surface charge densities may fulfil function of a link in the chain of events triggering membrane-bound activities in response to external stimuli. © 1978.
- 1977The similarity of prokaryotic cells and the organelles of eukaryotes can be explained not only by the ordinary form of the endosymbiosis hypothesis, but also by another evolutionary model presented here. This model postulates that portions of DNA of an ancient prokaryote were transferred into the nucleus of the ancient eukaryote cell. In combination with prokaryotic DNA-encoded proteins and phospholipid membranes prokaryotic DNA may have given rise to a structure resembling a promitochondrion or a proplastid. The transfer of genetic material into the nucleus or the cytoplasm could have occurred via a virus-mediatich. This suggestion is in accordance with the reported association of chloroplasts and plant mitochondria with replication of some strains of tobacco mosaic virus, cucumber green mottle mosaic virus, barley stripe virus and tobacco rattle virus and with findings of virus-like particles in mammalian and reptilian cells as well as cells of Neurospora crassa. The terms "mitophages" and "plastophages" ("chlorophages") are introduced to designate the viruses associated with mitochondria or plastids (chloroplasts) during some phase of development. Participation of virus-mediated DNA transfers can be suggested for endosymbiotic organellar origin also. © 1977.
- 19761. Photoinduced generation of elcctric current by bacteriorhodopsin, incorporated into the planar phospholipid membrane, has been directly measured with conventional electrometer techniques. 2. Two methods for bacteriorhodopsin incorporation have been developed: (a) formation of planar membrane from a mixture of decane solution of phospholipids and of the fraction of violet fragments of the Halobacterium halobium membrane (bacteriorhodopsin sheets), and (b) adhesion of bacteriorhodopsin-containing reconstituted spherical membranes (proteoliposomes) to the planar membrane in the presence of Ca 2+ or some other cations. In both cases, illumination was found to induce electric current generation directed across the planar membrane, an effect which was measured by macroelectrodes immersed into electrolyte solutions on both sides of the membrane. 3. The maximal values of the transmembrane electric potential were of about 150 mV at a current of about 10 -11A. The electromotive force measured by means of counterbalancing the photoeffect by an external battery, was found to reach the value of 300 mV. 4. The action spectrum of the photoeffect coincides with the bacteriorhodopsin absorption spectrum (maximum about 570 nm). 5. Both components of electrochemical potential of H + ions (electric potential and ΔpH) across the planar membrane affect the bacteriorhodopsin photoelectric response in a fashion which could be expected if bacteriorhodopsin were a light-dependent electrogenic proton pump. 6. La 2+ ions were shown to inhibit operation of those bacteriorhodopsin which pump out H + ions from the La 2+-containing compartment. 7. The photoeffect, mediated by proteoliposomes associated with thick planar membrane, is decreased by gramicidin A at concentrations which do not influence the planar membrane resistance in the light. On the contrary, a protonophorous uncoupler, trichlorocarbonylcyanidephenylhydrazone, decreases the photoeffect only if it is added at a concentration lowering the light resistance. The dark resistance is shown to be higher than the light one, and decreases to the light level by gramicidin. 8. A simple equivalent electric scheme consistent with the above results has been proposed.
- 1976Nauchnye doklady vysshei shkoly. Biologicheskie nauki0No abstract available
- 1975Generation of membrane potential (Δψ) and transmembrane pH difference (ΔpH) was studied in PPi-energized chromatophores of Rhodospirillum rubrum by means of measurements of carotenoid and bacteriochlorophyll absorption changes, atebrin and 8-anilinonaphthalene-1-sulphonate fluorescence responses, and phenyldicarbaundecaborane transport. The data obtained are consistent with the suggestion that carotenoid, bacteriochlorophyll and phenyldicarbaundecaborane responses are indicators of Δψ, while an atebrin response is an indicator of ΔpH. The fluorescence of 8-anilinonaphthalene-1-sulphonate is affected both by Δψ and ΔpH. © 1975.
- 1974SUMMARY. A method for association of proteoliposomes with planar phospholipid membrane has been elaborated, by which operation of molecular electric generators, such as cytochrome oxidase, H+-ATPase and bacteriorhodopsin, can be followed using ordinary electrometer techniques. © 1974 Nature Publishing Group.
- 1974No abstract available
- 1974Nauchnye doklady vysshei shkoly. Biologicheskie nauki0No abstract available
- 1973
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