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Long-term studies of the species composition of phytoplankton in Amursky Bay (Sea of Japan) carried out during the period from 1991 to 2006 revealed a total of 357 species of planktonic microalgae from eight divisions: Cyanophyta (8 species), Chrysophyta (8), Bacillariophyta (157), Cryptophyta (5), Dinophyta (143), Raphidophyta (3), Euglenophyta (11), and(More)
The qualitative and quantitative composition of the Chaetoceros Ehr. species was studied in Amursky Bay (Sea of Japan) from January 1996 until May 1998. In all, 30 species, 1 variety, and 1 form of this genus were registered. The species Chaetoceros occurred in plankton throughout the year at a water temperature of –1.8–25°C and a salinity of 11–35‰. The(More)
Phytoplankton studies in Peter the Great Bay (Sea of Japan) revealed three species of the genus Pseudo-nitzschia H. Perag. in H. et M. Peragallo, namely, P. pungens (Grun. ex Cl.) Hasle; P. multiseries (Grun.) Hasle, and P. pseudodelicatissima Hasle. Mass blooms of P. pungens and P. multiseries were registered in Amurskii Bay in June 1992. The maximum(More)
Phospholipid composition was studied in tissues of root voles Microtus oeconomus Pall. from natural populations inhabiting territories with increased levels of natural radioactivity. Lipid component of biological membranes of animal tissues was shown to have high sensitivity to action of chronic low-intensity irradiation at small doses. Under effect of(More)
The morphologies of two species of Skeletonema Greville from Paris Bay (Russky Island, the Sea of Japan) were studied by light microscopy and transmission electron microscopy. The examined species were identified as S. grethae and S. japonicum; their occurrence in the seas of Russia was recorded for the first time. Detailed morphological descriptions are(More)
Phospholipid composition has been studied in blood erythrocytes of tundra voles Microtus oeconomus inhabiting territories with normal and increased levels of natural radioactivity in different phases of the population cycle. It has been shown that rearrangement in the lipid component of blood erythrocyte membranes of tundra voles from radioactively polluted(More)
The diatom Pseudo-nitzschia americana (Hasle) Fryxell was found in bathometric phytoplankton samples collected in Amurskii Bay, Sea of Japan, and in coastal areas of Sakhalin Island, Sea of Okhotsk, in different seasons from 1994 to 2000. This is the first finding of this species in Russian seas. A morphological description is provided, including data from(More)
The results of long-term investigations (1981-1999) on the state of Microtus oeconomus Pall. (tundra vole) population, living under the increased natural radiation background for a long time (for more than 100 generations), are presented. Population density dynamics, morphophysiological parameters, state of the lipid peroxidation regulatory system in(More)
The lipid composition of tissue membranes was studied in tundra voles at different phases of population cycle. At the period of depression of the volume of population, there were found a sharp rise of the content of lysophosphatidylcholine (LPC) in lipids of liver and spleen, the appearance of trace amounts of lysoforms in the brain tissue, and a reduction(More)
Two diastereomers of methylpheophorbide a 13(2)-N-n-octyl-N-(2-hydroxy-3-isobornyl-5-methylbenzyl)amide were obtained from (+)- and (−)-enantiomers of 2-isobornyl-4-methylphenol. The evaluation of the membrane protective and antioxidant activity of the individual diastereomers on the model of H2O2-induced hemolysis of blood erythrocytes showed that the(More)