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Russian Journal of Ecology - A study of the anthropogenic impacts on the on-shore aggregation of true seals was carried out at a haul-out located at the mouth of Piltun Bay (the northeastern part... 相似文献
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Simokon Mikhail V. Trukhin Alexey M. 《Environmental science and pollution research international》2021,28(43):60622-60634
Environmental Science and Pollution Research - Concentrations of 22 essential and non-essential trace elements (Be, Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd, Sb, Ba, Tl, Pb, Th, U, and... 相似文献
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The results of observation of a seal haul-out at the mouth of Piltun Bay on the northeastern Sakhalin coast conducted from 1997 to 2001 are reported. The species composition and spatial structure of the seal haul-out have been studied. The haul-out community is dominated by the largha seal, which is more numerous than the ringed seal and bearded seal throughout the ice-free period. The characteristics of annual, seasonal, and daily variation in the numbers have been estimated, and their mechanisms have been determined. To date, the development of oil deposits on the northeastern Sakhalin shelf has had no negative effect on seals. 相似文献
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Trukhin A Kruchkov F Hansen LK Kallenborn R Kiprianova A Nikiforov V 《Chemosphere》2007,67(9):1695-1700
The primary goal for the study presented here was the preparation and characterisation of enantiomeric pure chlorobornane standards (Toxaphene). In this context, we partially modeled the procedure for Polychloropinene production in the former USSR. The initial reaction was ionic addition of hydrogen chloride to (1S)-alpha-pinene resulting predominantly in (1S)-2-endo-chlorobornane. Further photochlorination gave mixtures of chlorinated terpenes with different average content of Cl per molecule. The resulting mixtures were separated on a silica-gel column and a number of known hepta to decachlorobornanes were identified in fractions with the help of NMR and GC (using electron capture and mass spectrometric detection)--but in very unusual ratios as compared to the technical Toxaphene mixture formerly produced by Hercules (USA). Also several previously unknown congeners were isolated or detected. Three of the isolated congeners were obtained in crystalline state and X-ray crystallography showed their enantiomeric purity. 相似文献
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