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Moisture management behaviour of modified polyester wool fabrics
Pawan Kumar,Sujit Kumar Sinha,Subrata Ghosh 한국의류학회 2015 Fashion and Textiles Vol.2 No.1
To support the thermo regularity system of human body in completely changed environment and physical activity the functional clothing must create a stable microclimate next to the skin. The present study deals with the moisture transport and moisture management behaviour of polyester wool yarn and knitted fabric treated with two types of enzyme viz; alkaline protease enzyme and acidic protease enzyme. The prime object of this study was to enhance the moisture transport and moisture management properties of yarn and fabric for use in active wear. The results reveal superior wicking behaviour by alkaline protease enzyme treatment, while superior moisture vapour permeability with acidic protease enzyme treatment. Moisture management properties of alkaline protease enzyme treated fabric gives better result, ranging its grade from very good to excellent with higher absorption rate, one way transport capacity and spreading speed. Analysis of variance (ANOVA) was applied to test statistical significance level of all effects.
Studies on Synonymous Codon and Amino Acid Usage Biases in the Broad-Host Range Bacteriophage KVP40
Sau Keya,Gupta Sanjib Kumar,Sau Subrata,Mandal Subhas Chandra,Ghosh Tapash Chandra The Microbiological Society of Korea 2007 The journal of microbiology Vol.45 No.1
In this study, the relative synonymous codon and amino acid usage biases of the broad-host range phage, KVP40, were investigated in an attempt to understand the structure and function of its proteins/protein-coding genes, as well as the role of its tRNAs. Synonymous codons in KVP40 were determined to be AT-rich at the third codon positions, and their variations are dictated principally by both mutational bias and translational selection. Further analysis revealed that the RSCU of KVP40 is distinct from that of its Vibrio hosts, V. cholerae and V. parahaemolyticus. Interestingly, the expression of the putative highly expressed genes of KVP40 appear to be preferentially influenced by the abundant host tRNA species, whereas the tRNAs expressed by KVP40 may be required for the efficient synthesis of all its proteins in a diverse array of hosts. The data generated in this study also revealed that KVP40 proteins are rich in low molecular weight amino acid residues, and that these variations are influenced primarily by hydropathy, mean molecular weight, aromaticity, and cysteine content.
( Keya Sahu ),( Sanjib Kumar Gupta ),( Tapash Chandra Ghosh ),( Subrata Sau ) 생화학분자생물학회 2004 BMB Reports Vol.37 No.4
The extent of codon usage in the protein coding genes of the mycobacteriophage, Bxzl, and its plating bacteria, M. smegmatis, were determined, and it was observed that the codons ending with either G and / or C were predominant in both the organisms. Multivariate statistical analysis showed that in both organisms, the genes were separated along the first major explanatory axis according to their expression levels and their genomic GC content at the synonymous third positions of the codons. The second major explanatory axis differentiates the genes according to their genome type. A comparison of the relative synonymous codon usage between 20 highly- and 20 lowly expressed genes from Bxzl identified 21 codons, which are statistically over represented in the former group of genes. Further analysis found that the Bxzl- specific tRNA species could recognize 13 out of the 21 over represented synonymous codons, which incorporated 13 amino acid residues preferentially into the highly expressed proteins of Bxzl. In contrast, seven amino acid residues were preferentially incorporated into the lowly expressed proteins by 10 other tRNA species of Bxzl. This analysis predicts for the first time that the Bxzl-specific tRNA species modulates the optimal expression of its proteins during development.
Sahu, Keya,Gupta, Sanjib Kumar,Ghosh, Tapash Chandra,Sau, Subrata Korean Society for Biochemistry and Molecular Biol 2004 Journal of biochemistry and molecular biology Vol.37 No.4
The extent of codon usage in the protein coding genes of the mycobacteriophage, Bxz1, and its plating bacteria, M. smegmatis, were determined, and it was observed that the codons ending with either G and / or C were predominant in both the organisms. Multivariate statistical analysis showed that in both organisms, the genes were separated along the first major explanatory axis according to their expression levels and their genomic GC content at the synonymous third positions of the codons. The second major explanatory axis differentiates the genes according to their genome type. A comparison of the relative synonymous codon usage between 20 highly- and 20 lowly expressed genes from Bxz1 identified 21 codons, which are statistically over represented in the former group of genes. Further analysis found that the Bxz1- specific tRNA species could recognize 13 out of the 21 over represented synonymous codons, which incorporated 13 amino acid residues preferentially into the highly expressed proteins of Bxz1. In contrast, seven amino acid residues were preferentially incorporated into the lowly expressed proteins by 10 other tRNA species of Bxz1. This analysis predicts for the first time that the Bxz1-specific tRNA species modulates the optimal expression of its proteins during development.
A Review on the Nickel Based Metal Matrix Composite Coating
Ranit Karmakar,Pabitra Maji,Subrata Kumar Ghosh 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.7
Degradation of a material due to the chemical/electrochemical and/or frictional interaction with the surroundings initiatesat the surface because of the external stresses and frequent environmental attacks. The surface properties like hardness,wear resistance and corrosion resistance can be improved by means of composite coating. Recently Nickel based compositecoating has found a new horizon because of excellent wear and corrosion resistance and high hardness. In this article, theNi based metal matrix composite coating by various techniques are reviewed. Composition, process parameters, subsequentmechanical properties as well as microstructures and their efects are briefy tailored. Finally, new directions for future workon this technology are suggested.
Gaurav Sharma,Ankit Kotia,Subrata Kumar Ghosh,Prashant Singh Rana,Seema Bawa,Mohamed Kamal Ahmed Ali 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.10
Recent researchers widely used nanoparticle additives for improving thermal and rheological properties of machine lubricant. In present study the effect of Al2O3 and CeO2 nanoparticles on transmission oil (SAE30), hydraulic oil (HYDREX100) and gear oil (EP90) of heavy earth moving machinery is investigated. Nano-lubricant samples are prepared in 0.01–4% nanoparticle volume fraction range. Four machine learning techniques namely decision tree (DT), random forest (RF), generalized linear models and neural network (NN) have been used to predict the kinematic viscosity for Al2O3 and CeO2 nanolubricants. Further, multi-criteria decision-making technique named technique for order of preference by similarity to ideal solution have been used to find the best predictive method in each category of the nanolubricants. DT, RF and NN methods are found to be most accurate in kinematic viscosity prediction of transmission oil (R 2 = 0.861), hydraulic oil (R 2 = 0.971) and gear oil (R 2 = 0.973), respectively.
Studies on Synonymous Codon and Amino Acid Usage Biases in the Broad-Host Range Bacteriophage KVP40
Keya Sau,Sanjib Kumar Gupta,Subrata Sau,Subhas Chandra Mandal,Tapash Chandra Ghosh 한국미생물학회 2007 The journal of microbiology Vol.45 No.1
In this study, the relative synonymous codon and amino acid usage biases of the broad-host range phage, KVP40, were investigated in an attempt to understand the structure and function of its proteins/proteincoding genes, as well as the role of its tRNAs. Synonymous codons in KVP40 were determined to be ATrich at the third codon positions, and their variations are dictated principally by both mutational bias and translational selection. Further analysis revealed that the RSCU of KVP40 is distinct from that of its Vibrio hosts, V. cholerae and V. parahaemolyticus. Interestingly, the expression of the putative highly expressed genes of KVP40 appear to be preferentially influenced by the abundant host tRNA species, whereas the tRNAs expressed by KVP40 may be required for the efficient synthesis of all its proteins in a diverse array of hosts. The data generated in this study also revealed that KVP40 proteins are rich in low molecular weight amino acid residues, and that these variations are influenced primarily by hydropathy, mean molecular weight, aromaticity, and cysteine content.
Bhushan, Shashi,Gogoi, Mandakini,Bora, Abhispa,Ghosh, Sourav,Barman, Sinchini,Biswas, Tethi,Sudarshan, Mathummal,Thakur, Ashoke Ranjan,Mukherjee, Indranil,Dey, Subrata Kumar,Chaudhuri, Shaon Ray The Korean Society for Microbiology and Biotechnol 2019 한국미생물·생명공학회지 Vol.47 No.2
Earlier studies by our group revealed that gallic acid in phytochemicals stimulated biofilm production in epiphytes, while caffeic acid in phytochemicals inhibited biofilm production in non-epiphytes. It is well documented that antimicrobial secretion by some epiphytic bacteria inhibits non-epiphytic bacterial growth on leaf surfaces. These selection criteria help plants choose their microbial inhabitants. Calcium and iron in phytochemicals also stimulate biofilm formation and thus, may be selection criteria adopted by plants with respect to their native epiphytic population. Furthermore, the processing of leaves during phytochemical extraction impacts the composition of the extract, and therefore its ability to affect bacterial biofilm formation. Computation of the Hurst exponent using biofilm thickness data obtained from the Ellipsometry of Brewster Angle Microscopic (BAM) images is an efficient tool for understanding the impact of phytochemicals on epiphytic and non-epiphytic populations when compared to fluorescent microscopy, scanning electron microscopy, and staining techniques. To the best of our knowledge, this is the first report that uses the Hurst exponent to elucidate the mechanism involved in plant microbe interaction.
Shashi Bhushan,Mandakini Gogoi,Abhispa Bora,Sourav Ghosh,Sinchini Barman,Tethi Biswas,Mathummal Sudarshan,Ashoke Ranjan Thakur,Indranil Mukherjee,Subrata Kumar Dey,Shaon Ray Chaudhuri 한국미생물·생명공학회 2019 한국미생물·생명공학회지 Vol.47 No.2
Earlier studies by our group revealed that gallic acid in phytochemicals stimulated biofilm production in epiphytes, while caffeic acid in phytochemicals inhibited biofilm production in non-epiphytes. It is well documented that antimicrobial secretion by some epiphytic bacteria inhibits non-epiphytic bacterial growth on leaf surfaces. These selection criteria help plants choose their microbial inhabitants. Calcium and iron in phytochemicals also stimulate biofilm formation and thus, may be selection criteria adopted by plants with respect to their native epiphytic population. Furthermore, the processing of leaves during phytochemical extraction impacts the composition of the extract, and therefore its ability to affect bacterial biofilm formation. Computation of the Hurst exponent using biofilm thickness data obtained from the Ellipsometry of Brewster Angle Microscopic (BAM) images is an efficient tool for understanding the impact of phytochemicals on epiphytic and non-epiphytic populations when compared to fluorescent microscopy, scanning electron microscopy, and staining techniques. To the best of our knowledge, this is the first report that uses the Hurst exponent to elucidate the mechanism involved in plant microbe interaction.
R. K. Bhogendro Meitei,Pabitra Maji,Ashutosh Samadhiya,Ranit Karmakar,Subrata Kumar Ghosh,Subhash Chandra Saha 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.4
The Cu–SS welded structures are widely used in nuclear and power generation industries. Various solid state and fusion weldingtechniques have been experimented for welding Cu–SS with resultant phenomena of low joining strength in solid state andgeneration of crack in fusion. Of late application of induction heating as a joining technique is gaining momentum in viewof its low maintenance, high production rate and cost eff ectiveness. In consideration of the above facts, in this study, inductionheating for welding Cu–SS is experimented in ambient condition under varied settings of load and current. Althoughfew micro-cracks were observed in SEM images, successful joining between copper and stainless steel was achieved. Somecompounds like FeCu 4 , Cr 3 Fe, Cu(Fe 2 O 4 ) and CrO were detected by XRD near the weld interface. The microhardnessincreased near the interface in comparison to the base metals. The interface microhardness was increased with current andload. Similarly, the tensile strength was also increased for higher values of process parameters. Highest strength of 220 MPawas obtained at 2 kg load and 650 A current. Failure of welded joint under tension took place by ductile–brittle fracture mode.