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排序方式: 共有97条查询结果,搜索用时 11 毫秒
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Russian Journal of Marine Biology - The seasonal accumulation of the amnesic toxin domoic acid (DA) in the tissues of two commercial species of bivalves from Vostok Bay (the Sea of Japan) was... 相似文献
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V. M. Shulkin T. Yu. Orlova O. G. Shevchenko I. V. Stonik 《Russian Journal of Marine Biology》2013,39(3):197-207
The factors that control the seasonal variability of the concentration of suspended matter, nutrients, dissolved forms of metals and phytoplankton biomass in coastal waters of the eastern part of the Amurskii Bay were determined. It was shown that the runoff of the Razdolnaya River determined the seasonal variability in suspended matter content, values of the chemical oxygen demand (COD), silicates, Fe, Mn, Cu, and Ni significantly affected the concentration of nitrates. The advection of sea water is the main source of phosphates and dissolved forms of Zn and Cd. In the autumn and winter seasons, the gradual decrease in the concentration of silicates and phosphates was related to phytoplankton activity. In the spring and summer seasons, the growth of phytoplankton determined the variability of the phosphate and nitrate contents and compensated for the effect of the Razdolnaya River runoff. It is concluded that the phytoplankton biomass, rather than variations in riverine flow, caused the long-term variability of the nitrate and phosphate concentrations in the coastal waters of the Amurskii Bay. 相似文献
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Levina E. V. Andriyashchenko P. V. Kalinovsky A. I. Dmitrenok P. S. Stonik V. A. 《Russian Journal of Bioorganic Chemistry》2002,28(3):189-193
Sodium salt of (20R)-3,4-dihydroxycholest-5-ene-21-yl sulfate and disodium salts of (20R)-4-hydroxycholest-5-ene-3,21-diyl disulfate, (20R)-24-methylcholest-5,24(28)-diene-3,21-diyl disulfate, (20R)-24-methyl-5-cholest-24(28)-ene-3,21-diyl disulfate, (20R)-cholest-5-ene-3,21-diyl disulfate, (20R)-5-cholestane-3,21-diyl disulfate, and (20R)-3-hydroxycholest-5-ene-2,21-diyl disulfate were isolated from the far eastern starfish Diplopteraster multipes and characterized. These compounds differ structurally from sulfated polyhydroxysteroids in other starfish species. At the same time, they are typical secondary metabolites of Ophiuroidea and have some structural features characteristic of the ophiuroid-isolated steroids, namely the 3-hydroxy (or 3-sulfoxy) and 21-sulfoxy groups. These data support the opinion of some taxonomists that starfishes and ophiuroids are phylogeneteically related classes and are closer to each other than to other classes of the Echinodermata phylum. 相似文献
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Anna Schwendeman Denis O. Sviridov Wenmin Yuan Yanhong Guo Emily E. Morin Yue Yuan John Stonik Lita Freeman Alice Ossoli Seth Thacker Salena Killion Milton Pryor Y. Eugene Chen Scott Turner Alan T. Remaley 《Journal of lipid research》2015,56(9):1727-1737
The goal of this study was to understand how the reconstituted HDL (rHDL) phospholipid (PL) composition affects its cholesterol efflux and anti-inflammatory properties. An ApoA-I mimetic peptide, 5A, was combined with either SM or POPC. Both lipid formulations exhibited similar in vitro cholesterol efflux by ABCA1, but 5A-SM exhibited higher ABCG1- and SR-BI-mediated efflux relative to 5A-POPC (P < 0.05). Injection of both rHDLs in rats resulted in mobilization of plasma cholesterol, although the relative potency was 3-fold higher for the same doses of 5A-SM than for 5A-POPC. Formation of preβ HDL was observed following incubation of rHDLs with both human and rat plasma in vitro, with 5A-SM inducing a higher extent of preβ formation relative to 5A-POPC. Both rHDLs exhibited anti-inflammatory properties, but 5A-SM showed higher inhibition of TNF-α, IL-6, and IL-1β release than did 5A-POPC (P < 0.05). Both 5A-SM and 5A-POPC showed reduction in total plaque area in ApoE−/− mice, but only 5A-SM showed a statistically significant reduction over placebo control and baseline (P < 0.01). The type of PL used to reconstitute peptide has significant influence on rHDL’s anti-inflammatory and anti-atherosclerosis properties. 相似文献
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This paper documents the species diversity of the diatom genus Attheya from the Sea of Japan. Two species (A. arenicola and A. longicornis) were studied in field samples and in culture. Their morphology is described using light and electron microscopy; the ecology and the distribution data are provided. A. arenicola is a new record for the seas of Russia. 相似文献
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Sea Cucumbers Triterpene Glycosides, the Recent Progress in Structural Elucidation and Chemotaxonomy
Vladimir I. Kalinin Alexandra S. Silchenko Sergey A. Avilov Valentin A. Stonik Alexey V. Smirnov 《Phytochemistry Reviews》2005,4(2-3):221-236
Triterpene glycosides are characteristic metabolites of sea cucumbers (Holothurioidea, Echinodermata). Majority of the glycosides
belong to holostane type (lanostane derivatives with 18(20)-lactone). Carbohydrate chains of these glycosides contain xylose,
glucose, quinovose, 3-O-methylglucose and 3-O-methyl sylose. During the last 5 years, main investigations were focused on holothurians belonging to the order Dendrochirotida
collected in the North Pacific, North Atlantic, Antarctic and in subtropical waters. The glycosides of holothurians belonging
to the order Aspidochirotida have also been studied. The most uncommon structural features of carbohydrate chains of new glycosides
were: (1) the presence of quinovose as fifth terminal monosaccharide unit and the presence of two quinovose residues; (2)
the presence of glucose instead of common xylose as fifth terminal monosaccharide unit; (3) trisaccharide carbohydrate chain;
(4) the presence of two 3-O-methylxylose terminal monosaccharide units; (5) the presence of sulfate group at C-3 of quinovose residue. New glycosides
without lactone or with 18(16)-lactone and having shortened side chains have also been isolated. The presence of 17α and 12α-hydroxyls,
which are characteristic for glycosides from holothurians belonging to the family Holothuriidae (Aspidochirotida) in glycosides
of dendrochirotids confirms parallel and relatively independent character of evolution of glycosides. All three families belonging
to the order Aspidochirotida: Holothuriidae, Stichopodidae and Synallactidae have similar and parallel trends in evolution
of the glycosides carbohydrate chains, namely from non-sulfated hexaosides to sulfated tetraosides. Sets of aglycones in glycosides
from holothurians belonging to the genus Cucumaria (Cucumariidae, Dendrochirotida) are specific for each species. The carbohydrate chains are similar in all representatives
of the genus Cucumaria. 相似文献
10.
The results of long-term studies of the species structure of microalgae plankton of the coast of the Sea of Okhotsk of Sakhalin Island were summarized. There were 227 species and 4 intraspecific taxa attributed to 8 divisions. The greatest number of species was represented by the divisions Bacillariophyta (112 species and 3 intraspecific taxa) and Dinophyta (96 and 1 respectively). For the first time 5 diatom, 4 dinoflagellate, and 1 euglenophyte species were recorded for the Sea of Okhotsk. 相似文献