3 September 30, 2015
1. Oleg Mosin, Ignat Ignatov, Dmitry Skladnev, Vitaly Shvets
The Development of Biosynthesis of 2Н- and 13С-labeled Amino acids and Proteins with Various Levels of Isotopic Enrichment Using Bacterial Objects
European Reviews of Chemical Research, 2015, Vol.(5), Is. 3, pp. 144-165.
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2. Ignat Ignatov, Oleg MosinEuropean Reviews of Chemical Research, 2015, Vol.(5), Is. 3, pp. 144-165.
Abstract:
By the method of microbiological synthesis were obtained and analyzed by electron impact mass-spectrometry 2H, 13C-labeled amino acids of a facultative methylotrophic bacterium Brevibacterium methylicum and an obligate methylotrophic bacterium Methylobacillus flagellatum and 2H, 13C-labeled amino acids of the total protein of biomass obtained on media containing as a source of stable isotopes [2H]methanol, [13C]methanol and 2H2O. It was also performed the incorporation of L-[2,3,4,5,6-2Н]phenylalanine, L-[3,5-2Н]tyrosine and L-[2,4,5,6,7-2Н]tryptopan into the membrane integral protein bacteriorhodopsin synthesised in purple membranes of photo-organotrophic halobacterium Halobacterium halobium ET 1001. For mass-spectrometric analysis the multicomponential mixtures of 2H- and 13C-labeled amino acids, derived from cultural media and protein hydrolysates after hydrolysis in 6 M 2HСl (3% phenol) and 2 M Ва(OH)2 were modified into N-benzyloxycarbonyl-derivatives of amino acids as well as into methyl esters of N-5-(dimethylamino)naphthalene-1-sulfonyl chloride (dansyl) derivatives of [2H, 13С]amino acids, which were preparative separated using a method of reverse-phase HCLP. Biosynthetically obtained 2H- and 13C-labeled amino acids represented the mixtures differing in quantities of isotopes incorporated into molecule. The levels of 2H and 13С enrichment of secreted amino acids and amino acid resigues of protein were found to vary from 20,0 atom.% to L-leucine/isoleucine up to 97,5 atom.% for L-alanine depending on concentration of 2H- and 13C-labelled substrates.
By the method of microbiological synthesis were obtained and analyzed by electron impact mass-spectrometry 2H, 13C-labeled amino acids of a facultative methylotrophic bacterium Brevibacterium methylicum and an obligate methylotrophic bacterium Methylobacillus flagellatum and 2H, 13C-labeled amino acids of the total protein of biomass obtained on media containing as a source of stable isotopes [2H]methanol, [13C]methanol and 2H2O. It was also performed the incorporation of L-[2,3,4,5,6-2Н]phenylalanine, L-[3,5-2Н]tyrosine and L-[2,4,5,6,7-2Н]tryptopan into the membrane integral protein bacteriorhodopsin synthesised in purple membranes of photo-organotrophic halobacterium Halobacterium halobium ET 1001. For mass-spectrometric analysis the multicomponential mixtures of 2H- and 13C-labeled amino acids, derived from cultural media and protein hydrolysates after hydrolysis in 6 M 2HСl (3% phenol) and 2 M Ва(OH)2 were modified into N-benzyloxycarbonyl-derivatives of amino acids as well as into methyl esters of N-5-(dimethylamino)naphthalene-1-sulfonyl chloride (dansyl) derivatives of [2H, 13С]amino acids, which were preparative separated using a method of reverse-phase HCLP. Biosynthetically obtained 2H- and 13C-labeled amino acids represented the mixtures differing in quantities of isotopes incorporated into molecule. The levels of 2H and 13С enrichment of secreted amino acids and amino acid resigues of protein were found to vary from 20,0 atom.% to L-leucine/isoleucine up to 97,5 atom.% for L-alanine depending on concentration of 2H- and 13C-labelled substrates.
Number of views: 2077 Download in PDF
Physical-Chemical Properties of Mountain Water from Bulgaria after Exposure To a Fullerene Containing Mineral Shungite and Aluminosilicate Mineral Zeolite
European Reviews of Chemical Research, 2015, Vol.(5), Is. 3, pp. 166-179.
Number of views: 2231 Download in PDF
3. H.A. Shindy, A.K. Khalafalla, M.M. Goma, A.H. EedEuropean Reviews of Chemical Research, 2015, Vol.(5), Is. 3, pp. 166-179.
Abstract:
We studied the physical-chemical properties of mountain water from Bulgaria influenced by the fullerene analogous, carbon containing natural mineral shungite from Zazhoginskoe deposit in Karelia (Russian Federation) and the microporous crystalline aluminosilicate mineral zeolite (Most, Bulgaria) for evaluation of the mathematical model of interaction of these minerals with water. The data about the structure and composition were obtained with using of transmission electron microscopy (TEM) and IR-spectroscopy. For evaluation of the mathematical model of interaction of these minerals with water, the methods of non-equilibrium spectrum (NES) and differential non-equilibrium spectrum (DNES) of water were applied. The average energy (∆EH...O) of hydrogen Н…O-bonds among individual molecules H2O after treatment of shungite and zeolite with water was measured at -0,1137 eV for shungite and -0,1174 eV for zeolite. The calculation of ∆EH...O for shungite with using DNES method compiles +0,0025±0,0011 eV and for zeolite -1,2±0,0011 eV. The results indicated on the different mechanisms of interaction of these minerals with water, which is determined by their structure and the composition of constituent components, resulting in a different physical-chemical behavior when interacting with water.
We studied the physical-chemical properties of mountain water from Bulgaria influenced by the fullerene analogous, carbon containing natural mineral shungite from Zazhoginskoe deposit in Karelia (Russian Federation) and the microporous crystalline aluminosilicate mineral zeolite (Most, Bulgaria) for evaluation of the mathematical model of interaction of these minerals with water. The data about the structure and composition were obtained with using of transmission electron microscopy (TEM) and IR-spectroscopy. For evaluation of the mathematical model of interaction of these minerals with water, the methods of non-equilibrium spectrum (NES) and differential non-equilibrium spectrum (DNES) of water were applied. The average energy (∆EH...O) of hydrogen Н…O-bonds among individual molecules H2O after treatment of shungite and zeolite with water was measured at -0,1137 eV for shungite and -0,1174 eV for zeolite. The calculation of ∆EH...O for shungite with using DNES method compiles +0,0025±0,0011 eV and for zeolite -1,2±0,0011 eV. The results indicated on the different mechanisms of interaction of these minerals with water, which is determined by their structure and the composition of constituent components, resulting in a different physical-chemical behavior when interacting with water.
Number of views: 2231 Download in PDF
Synthesis and Photosensitization Evaluation of Some Novel Polyheterocyclic Cyanine Dyes
European Reviews of Chemical Research, 2015, Vol.(5), Is. 3, pp. 180-188.
Number of views: 2563 Download in PDF
4. European Reviews of Chemical Research, 2015, Vol.(5), Is. 3, pp. 180-188.
Abstract:
New polyheterocyclic compound, namely 4-methyl-6-oxo-2-phenyl-furo[(3,2-d)pyrazole; (3,2-d) imidazole] was prepared and oriented to synthesis of some novel monomethine cyanine dyes, dimethine cyanine dyes and mono/di- mixed methine cyanine dyes. The electronic visible absorption spectra of all the synthesized cyanine dyes were investigated in 95% ethanol solution to evaluate their photosensitization properties. Structural identification was carried out via the elemental analysis, visible spectra, mass spectrometry, IR and 1H NMR spectroscopic data.
New polyheterocyclic compound, namely 4-methyl-6-oxo-2-phenyl-furo[(3,2-d)pyrazole; (3,2-d) imidazole] was prepared and oriented to synthesis of some novel monomethine cyanine dyes, dimethine cyanine dyes and mono/di- mixed methine cyanine dyes. The electronic visible absorption spectra of all the synthesized cyanine dyes were investigated in 95% ethanol solution to evaluate their photosensitization properties. Structural identification was carried out via the elemental analysis, visible spectra, mass spectrometry, IR and 1H NMR spectroscopic data.
Number of views: 2563 Download in PDF