George V Zatonskii

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A derivative of allyl 3"-O-(2-acetamido-2-deoxy-beta-D-glucopyranosyl)-beta-lactoside with a free OH group at C-4GlcNAc was glycosylated with trichloroacetimidate of selectively protected GlcA(beta 1-->3)Gal alpha disaccharide in dichloromethane in the presence of trimethylsilyl triflate resulting in a pentasaccharide product with an 82% yield. This product(More)
Strains of Pseudomonas syringae pv. porri are characterized by a number of pathovar-specific phenotypic and genomic characters and constitute a highly homogeneous group. Using monoclonal antibodies, they all were classified in a novel P. syringae serogroup O9. The O polysaccharides (OPS) isolated from the lipopolysaccharides (LPS) of P. syringae pv. porri(More)
An acidic O-specific polysaccharide was obtained by mild acid degradation of the lipopolysaccharide of the bacterium Providencia alcalifaciens O7 and purified by gel chromatography followed by anion-exchange chromatography. On the basis of full acid hydrolysis, methylation, carboxyl reduction, selective cleavage with anhydrous hydrogen fluoride, and 1H- and(More)
The possibility of using DART mass spectrometry for the identification of active ingredients in tableted drugs has been studied. Analytical results for some drugs such as glycin, nootropyl, anaprilin, mexidol, and biseptol are presented. The benefits and limitations of DART mass spectrometry as applied to fast screening of tableted pharmaceuticals for(More)
Lipopolysaccharide of the bacterium Proteus mirabilis O24 was found to have a neutral O-specific polysaccharide chain containing D-galactose, 2-acetamido-2-deoxy-D-glucose, and 2-acetamido-2-deoxy-D-galactose in ratios 1:2:1. On the basis of 1H- and 13C-NMR spectroscopy, including two-dimensional correlation spectroscopy (COSY), H-detected 1H, 13C(More)
The structure of the acidic O-specific polysaccharide of a Gram-negative bacterium, H. alvei strain PCM 1199, was studied by NMR spectroscopy including two-dimensional correlation spectroscopy (COSY), total correlation spectroscopy (TOCSY), nuclear Overhauser effect spectroscopy (NOESY), 1H, 13C heteronuclear single-quantum coherence (HSQC), 1H, 13C(More)
Aseries of N-oxides of N-vinylpyrrolidone and 2-methyl-5-vinylpyridine copolymers with various degrees of oxidation were prepared via oxidation of the copolymers by peracetic acid. The N-oxidation kinetic rate constants were calculated using UV spectrophotometry. The temperature dependence of the limiting N-oxidation was determined. The molecular-weight(More)
A tetraketodiester of carbazole series containing methoxycarbonyl reactive groups separated from the chelating 1,3-dicarbonyl fragment by difluoromethylene spacers (CF2)4 was produced with the objective to develop new labels for the time-resolved immunofluorescence analysis. Complexes of this compound with Eu3+ ions are stable in aqueous solutions and(More)
The glycosylation of several mono- and dihydroxyl glycosyl acceptors based on allyl beta-D-galactopyranoside with completely acylated glucuronyl bromides under the Helferich reaction conditions was studied in order to develop a method for the preparative synthesis of selectively protected disaccharide beta-D-GlcA-(1-->3)-beta-D-Gal in a form that can be(More)
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