Number 1. (in 1 part) September 15, 2014
1. Marat I. Abdullin, Azamat A. Basyrov, Sergey N. Nikolaev, Yuliya A. Koksharova, Nikolay V. Koltaev
Defining the Conditions of ЗD Printing Using Abs Plastic
European Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 4-9.
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2. Mohammad AsifEuropean Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 4-9.
Abstract:
The article shows the possibility of printing materials using the 0809M ABS plastic. There have been determined the optimum temperature and feed rate of ABS filaments for obtaining prototypes of the highest quality. We have studied the physico-mechanical characteristics of the prototype, depending on the method of application of the polymeric material.
The article shows the possibility of printing materials using the 0809M ABS plastic. There have been determined the optimum temperature and feed rate of ABS filaments for obtaining prototypes of the highest quality. We have studied the physico-mechanical characteristics of the prototype, depending on the method of application of the polymeric material.
Number of views: 2467 Download in PDF
Antimicrobial Potential of Nicotinic Acid Derivatives Against Various Pathogenic Microbes
European Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 10-21.
Number of views: 2907 Download in PDF
3. Lili Janiashvili, Giuli Andronikashvili, Archil Varadashvili, Mzia GagolishviliEuropean Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 10-21.
Abstract:
Many human illnesses are caused by infections with microbes like viruses or bacteria or fungi. Amongst those various illnesses, certain tubercular, bacterial, viral and fungal infections are more common because of their tendency to develop new strains under any circumstances and developing resistance against the available drugs. This stimulated the scientists for development of novel molecules to combat these illnesses. Several nicotinic derivatives were evaluated for their antibacterial activity against tuberculosis. This review summarized the facts concerning nicotinic acid analogues. The nicotinic acid moiety of nicotinic acid has been introduced in a number of compounds with antimicrobial activity against various pathogens as well as resistant strains. Several nicotinic acid analogues have shown good antimicrobial activity. Therefore this class of compounds could be a good starting point to develop new lead compounds in the treatment of multi-drug resistant bacteria.
Many human illnesses are caused by infections with microbes like viruses or bacteria or fungi. Amongst those various illnesses, certain tubercular, bacterial, viral and fungal infections are more common because of their tendency to develop new strains under any circumstances and developing resistance against the available drugs. This stimulated the scientists for development of novel molecules to combat these illnesses. Several nicotinic derivatives were evaluated for their antibacterial activity against tuberculosis. This review summarized the facts concerning nicotinic acid analogues. The nicotinic acid moiety of nicotinic acid has been introduced in a number of compounds with antimicrobial activity against various pathogens as well as resistant strains. Several nicotinic acid analogues have shown good antimicrobial activity. Therefore this class of compounds could be a good starting point to develop new lead compounds in the treatment of multi-drug resistant bacteria.
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Heterofunctional Condensation of α,ω - Bis (Aminodimethylsilil) Tetramethyl - Cyclodisilazanes With Dichloranhydride Tereftalic Acids and α,ω - Bis (β - Carboxyethyl) Dimethylsiloxanes
European Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 22-26.
Number of views: 2736 Download in PDF
4. Mehmood A. Kalwar, Hakim A. Sahito, Barkat A. Kalwar, Madan Lal, Shahnawaz FazlaniEuropean Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 22-26.
Abstract:
With a view to synthesizing heat-resistant polymers, we performed the heterofunctional condensation (HFC) of α,ω-bis (aminodimethylsilil) tetramethyl- cyclodisilazanes with terephthaloyl chloride. The synthesized polymers are elastic products in light color. Their elasticity increases with an increase in cyclodisilazane fragments in the polymer chain. At temperatures of 360 to 3800C, there starts slow polymer degradation, while fast degradation occurs at a temperature of 400 to 4500C. We also performed the HFC of α,ω-bis (aminodimethylsilil) tetramethyl- cyclodisilazanes with α,ω-bis ( -carboxyethyl) dimethylhexanes. The synthesized products are caoutchouc-like products, as they contain pliant siloxane and cyclodisiloxane fragments. They have quite high thermal stability. The stability is impacted on by an increase in the dimethylsiloxane block in the copolymer chain. Polymers are resistant at temperatures of 510 to 5500C. At these temperatures, there starts their slow degradation. The thermal stability of polymers is not impacted on by an increase in the share of silazane cycles in the chain.
With a view to synthesizing heat-resistant polymers, we performed the heterofunctional condensation (HFC) of α,ω-bis (aminodimethylsilil) tetramethyl- cyclodisilazanes with terephthaloyl chloride. The synthesized polymers are elastic products in light color. Their elasticity increases with an increase in cyclodisilazane fragments in the polymer chain. At temperatures of 360 to 3800C, there starts slow polymer degradation, while fast degradation occurs at a temperature of 400 to 4500C. We also performed the HFC of α,ω-bis (aminodimethylsilil) tetramethyl- cyclodisilazanes with α,ω-bis ( -carboxyethyl) dimethylhexanes. The synthesized products are caoutchouc-like products, as they contain pliant siloxane and cyclodisiloxane fragments. They have quite high thermal stability. The stability is impacted on by an increase in the dimethylsiloxane block in the copolymer chain. Polymers are resistant at temperatures of 510 to 5500C. At these temperatures, there starts their slow degradation. The thermal stability of polymers is not impacted on by an increase in the share of silazane cycles in the chain.
Number of views: 2736 Download in PDF
Repellency and Antifeedant of Ticks Through Ethno Plant Extracts and Ivermectin on Buffalo Calves
European Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 27-35.
Number of views: 2621 Download in PDF
5. Oleg Mosin, Ignat Ignatov, Dmitry Skladnev, Vitaly ShvetsEuropean Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 27-35.
Abstract:
The study was performed to determine the performance of ginger, garlic, neem and ivermectin on the ticks. For that purpose, 12 male buffalo calves were selected, which were divided in four groups in A, B, C and D, each group contained 3 animals. The data was collected on 3rd, 8th, 15th and 21st day, respectively. The effectiveness of ivermectin on 3rd day found (25.92%), 8th (37.03%), 15th (92.6%) and 21st day found (100%) whereas, neem seed extract was observed on 3rd day found (55.81%), 8th (48.83%), 15th (41.86%) and on 21st day (46.51%) thus, ginger extract 3rd day found (63.46%), 8th (51.92%), 15th (51.92) and 21st day (61.54%), and garlic extract on 3rd day found (32.61%), 8th (39.13%), 15th (36.96%) and 21st day (30.43%), respectively. It was concluded from the comparative effect of the ethno plant extracts and ivermectin on ticks’ interaction that in total extract the ginger found more potent followed by neemseed extract and garlic but their effect was prolonged effect and 100% result was achieved through the ivermectin hence, it is recommended for the tick infestation and treatment.
The study was performed to determine the performance of ginger, garlic, neem and ivermectin on the ticks. For that purpose, 12 male buffalo calves were selected, which were divided in four groups in A, B, C and D, each group contained 3 animals. The data was collected on 3rd, 8th, 15th and 21st day, respectively. The effectiveness of ivermectin on 3rd day found (25.92%), 8th (37.03%), 15th (92.6%) and 21st day found (100%) whereas, neem seed extract was observed on 3rd day found (55.81%), 8th (48.83%), 15th (41.86%) and on 21st day (46.51%) thus, ginger extract 3rd day found (63.46%), 8th (51.92%), 15th (51.92) and 21st day (61.54%), and garlic extract on 3rd day found (32.61%), 8th (39.13%), 15th (36.96%) and 21st day (30.43%), respectively. It was concluded from the comparative effect of the ethno plant extracts and ivermectin on ticks’ interaction that in total extract the ginger found more potent followed by neemseed extract and garlic but their effect was prolonged effect and 100% result was achieved through the ivermectin hence, it is recommended for the tick infestation and treatment.
Number of views: 2621 Download in PDF
Microbiological Synthesis of 2Н- and 13С-Labeled Amino Acids and Proteins With Various Levels of Isotopic Enrichment
European Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 36-59.
Number of views: 2307 Download in PDF
6. Oleg Mosin, Ignat IgnatovEuropean Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 36-59.
Abstract:
By the method of microbiological synthesis were obtained and analyzed by electron impact mass-spectrometry the evaluation of 2H and 13C enrichment levels of secreted amino acids of methylotrophic bacteria Brevibacterium methylicum and Methylobacillus flagellatum, and amino acid resigues of total protein obtained from media contaning as a sourse 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 in bacteriorhodopsin synthesised in purple membranes of photo-organotrophic halobacterium Halobacterium halobium ET 1001. For mass-spectrometric analysis the multicomponential mixures 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 in methyl esters of N-dansyl-derivatives of amino acids, which were preparative separated using a method of reverse-phase HCLP. 2H- and 13C-labeled amino acids represented the mixures 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 the evaluation of 2H and 13C enrichment levels of secreted amino acids of methylotrophic bacteria Brevibacterium methylicum and Methylobacillus flagellatum, and amino acid resigues of total protein obtained from media contaning as a sourse 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 in bacteriorhodopsin synthesised in purple membranes of photo-organotrophic halobacterium Halobacterium halobium ET 1001. For mass-spectrometric analysis the multicomponential mixures 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 in methyl esters of N-dansyl-derivatives of amino acids, which were preparative separated using a method of reverse-phase HCLP. 2H- and 13C-labeled amino acids represented the mixures 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.
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Biosynthesis of 2H-labeled Photochrome Trans-membrane Protein Bacteriorhodopsin by Halobacterium Halobacterium Halobium
European Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 60-72.
Number of views: 2465 Download in PDF
7. European Reviews of Chemical Research, 2014, Vol.(1), № 1, pp. 60-72.
Abstract:
The semi-preparative biosynthesis of photochrome trans-membrane protein bacteriorhodopsin (output 810 mg), labeled with deuterium on functionally important amino acid residues [2,3,4,5,6-2H5]phenylalanine, [3,5-2H2]tyrosine, and [2,4,5,6,7-2H5]tryptophan was carried out with using a photo-organotrophic halobacterium Halobacterium halobium. The protein was isolated from purple membranes by cellular autolysis by distilled water, processing of bacterial biomass by ultrasound at 22 KHz, alcohol extraction of low and high-weight molecular impurities, cellular RNA, carotenoids and lipids, with the subsequent solubilization of final product with 0,5 % (w/v) SDS-Na and fractionation by methanol. The homogenity of the synthesized bacteriorhodopsin and the selectivity of deuterium incorporation into the molecule was proved by combination of preparative and analytical protein methods including elecrtophoresis in 12,5 % (w/v) PAAG with 0,1 % (w/v) SDS-Na, gel filtration chromatography on Sephadex G-200, reverse-phase HPLC and electron impact mass-spectrometry of methyl esters of N-Dns-[2H]derivatives of amino acids.
The semi-preparative biosynthesis of photochrome trans-membrane protein bacteriorhodopsin (output 810 mg), labeled with deuterium on functionally important amino acid residues [2,3,4,5,6-2H5]phenylalanine, [3,5-2H2]tyrosine, and [2,4,5,6,7-2H5]tryptophan was carried out with using a photo-organotrophic halobacterium Halobacterium halobium. The protein was isolated from purple membranes by cellular autolysis by distilled water, processing of bacterial biomass by ultrasound at 22 KHz, alcohol extraction of low and high-weight molecular impurities, cellular RNA, carotenoids and lipids, with the subsequent solubilization of final product with 0,5 % (w/v) SDS-Na and fractionation by methanol. The homogenity of the synthesized bacteriorhodopsin and the selectivity of deuterium incorporation into the molecule was proved by combination of preparative and analytical protein methods including elecrtophoresis in 12,5 % (w/v) PAAG with 0,1 % (w/v) SDS-Na, gel filtration chromatography on Sephadex G-200, reverse-phase HPLC and electron impact mass-spectrometry of methyl esters of N-Dns-[2H]derivatives of amino acids.
Number of views: 2465 Download in PDF