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Malik, Y.P.S.,Chakravarti, S.,Sharma, K.,Vaid, N.,Rajak, K.K.,Balamurugan, V.,Biswas, S.K.,Mondal, B.,Kataria, R.S.,Singh, R.K. Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.7
Toll-like receptors (TLRs) play an important role in the recognition of invading pathogens and the modulation of innate immune responses in mammals. The TLR4 and TLR7 are well known to recognize the bacterial lipopolysaccharide (LPS) and single stranded (ssRNA) ligands, respectively and play important role in host defense against Gram-negative bacteria and ssRNA viruses. In the present study, coding exon fragments of these two TLRs were identified, cloned, sequenced and analyzed in terms of insertion-deletion polymorphism, within bovine TLRs 4 and 7, thereby facilitating future TLR signaling and association studies relevant to bovine innate immunity. Comparative sequence analysis of TLR 4 exons revealed that this gene is more variable, particularly the coding frame (E3P1), while other parts showed percent identity of 95.7% to 100% at nucleotide and amino acid level, respectivley with other Bos indicus and Bos taurus breeds from different parts of the world. In comparison to TLR4, sequence analysis of TLR7 showed more conservation among different B. indicus and B. taurus breeds, except single point mutation at 324 nucleotide position (AAA to AAM) altering a single amino acid at 108 position (K to X). Percent identity of TLR7 sequences (all 3 exons) was between 99.2% to 100% at nucleotide and amino acid level, when compared with available sequence database of B. indicus and B. taurus. Simple Modular Architecture Research Tool (SMART) analysis showed variations in the exon fragments located in the Leucine Rich Repeat (LRR) region, which is responsible for binding with the microbial associated molecular patterns and further, downstream signaling to initiate anti-microbial response. Considering importance of TLR polymorphism in terms of innate immunity, further research is warranted.
A study of spectral element method for elliptic interface problems with nonsmooth solutions in R^{2}
N. Kishore Kumar,Pankaj Biswas,B. Seshadri Reddy 한국전산응용수학회 2020 Journal of applied mathematics & informatics Vol.38 No.3
The solution of the elliptic partial differential equation has interface singularity at the points which are either the intersections of interfaces or the intersections of interfaces with the boundary of the domain. The singularities that arises in the elliptic interface problems are very complex. In this article we propose an exponentially accurate nonconforming spectral element method for these problems based on [7, 18]. A geometric mesh is used in the neighbourhood of the singularities and the auxiliary map of the form z=lnξ is introduced to remove the singularities. The method is essentially a least-squares method and the solution can be obtained by solving the normal equations using the preconditioned conjugate gradient method (PCGM) without computing the mass and stiffness matrices. Numerical examples are presented to show the exponential accuracy of the method.
KUMAR, N. KISHORE,BISWAS, PANKAJ,REDDY, B. SESHADRI The Korean Society for Computational and Applied M 2020 Journal of applied mathematics & informatics Vol.38 No.3
The solution of the elliptic partial differential equation has interface singularity at the points which are either the intersections of interfaces or the intersections of interfaces with the boundary of the domain. The singularities that arises in the elliptic interface problems are very complex. In this article we propose an exponentially accurate nonconforming spectral element method for these problems based on [7, 18]. A geometric mesh is used in the neighbourhood of the singularities and the auxiliary map of the form z = ln ξ is introduced to remove the singularities. The method is essentially a least-squares method and the solution can be obtained by solving the normal equations using the preconditioned conjugate gradient method (PCGM) without computing the mass and stiffness matrices. Numerical examples are presented to show the exponential accuracy of the method.
Sujoy Biswas,P.N. Pathak,S.B. Roy 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.2
This paper reports the permeation of U(VI) from nitric acid medium across polytetrafluoroethylene (PTFE) membrane impregnated with dinonyl phenyl phosphoric acid (DNPPA) as carrier. The effects of various parameters such as nature and concentration of receiver phases, feed acidity, carrier/uranium concentration and membrane thickness were evaluated. 6 M H2SO4 was identified as receiver phase. Experimental data were fitted to a kinetic model to calculate the diffusion coefficient D(o) and mass transfer coefficients △ -1/(a) . The optimized conditions were applied for recovery of uranium from uranyl nitrate raffinate (UNR) waste solution generated during the purification of uranium through U(VI)–HNO3–TBP route.
Substrate bias effects during diamond like carbon film deposition by microwave ECR plasma CVD
R.M. Dey,S.B. Singh,A. Biswas,R.B. Tokas,N. Chand,S. Venkateshwaran,D. Bhattacharya,N.K. Sahoo,S.W. Gosavi,S.K. Kulkarni,D.S. Patil 한국물리학회 2008 Current Applied Physics Vol.8 No.1
Diamond like carbon (DLC) coatings were deposited on silicon(11) substrates by microwave electron cyclotron resonance (ECR)plasma CVD process using a plasma of Ar and CH4 gases under the inuence of DC self bias generated on the substrates by applicationof RF (13.56 MHz) power. DLC coatings were deposited under the varying inuence of DC bias (. 60 V to. 150 V) on the Si substrates.atomic force microscopy (AFM), Hardness and elastic modulus determination technique, Raman spectroscopy, scanning electronmicroscopy (SEM) and contact angle measurement. The results indicate that the lm grown at. 100 V bias has optimised propertieslike high sp3/sp2 ratio of carbon bonding, high refractive index (2.262.17) over wide spectral range 4001200 nm, low roughness of0.8 nm, high contact angle (80.) compared to the lms deposited at other bias voltages (. 60 V and . with each other and nd august explanation under the subplantation model for DLC growth.