Mawlana Bhashani Science and Technology University

www.mbstu.ac.bd
Tangail, Bangladesh

Mawlana Bhashani Science and Technology University is a government financed public university of Bangladesh. It is named after the charismatic, legendary political leader of the country Mawlana Bhashani. This University is the first of its kind among the public universities in Bangladesh. The medium of instruction is English. To ensure a better academic atmosphere, there is no provision for any political activities by the teachers, students and employees in the campus.Every year, about 700 students get enrolled in undergraduate programs to study in this institution. The total number of teachers is about 80. The University has continued to expand over the last few years. This includes the construction of new academic building, several halls for the students etc. Wikipedia.


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Mahbubul Bashar M.,Mawlana Bhashani Science and Technology University | Khan M.A.,Bangladesh Atomic Energy Commission
Journal of Polymers and the Environment | Year: 2013

About 48 % cotton fiber is consumed as clothing materials all over the globe. It is popular for softness, versatility, absorbance and breathability. Cotton is hydrophilic in nature and therefore, it can absorb sweat from the human body and can release in the surface that makes it comfortable. But it has some inherent limitations such as wrinkle, shrinkage, low dye uptake and microbial degradation. Various approaches have been made to overcome the above limitations. Surface modification of textiles to impart antimicrobial activity, shrinkage, wrinkle resistance, decreased skin irritation, increase dye exhaustion and even enhancing fragrance is the most recent trends in textile chemistry. Various monomers, polymers and biopolymers are applied in different ways to improve different properties of cotton. Chitosan is the mostly used biopolymer in this regard for its biocompatibility, biodegradability, nontoxicity and antimicrobial activity. This paper is a short overview of the most recent development in surface modification of cotton using biopolymers such as chitosan, starch and its derivatives and some other synthetic monomers and polymers. © 2012 Springer Science+Business Media, LLC.


Hoque M.M.M.,Mawlana Bhashani Science and Technology University | Kawamura K.,Hokkaido University of Science
Global Biogeochemical Cycles | Year: 2016

Remote marine aerosol samples (total suspended particles) were collected during a cruise in the central Pacific from Japan to Mexico (1°59'N-35°N and 171°54'E-90°58'W). The aerosol samples were analyzed for dicarboxylic acids (C2-C11), ω-oxoacids, pyruvic acid, α-dicarbonyls, and fatty acids as well as organic and elemental carbon, water-soluble organic carbon, and total nitrogen (WSTN). During the study, diacids were the most abundant compound class followed by fatty acids, ω-oxoacids, and α-dicarbonyls. Molecular compositions of diacids showed a predominance of oxalic (C2) acid followed by malonic (C3) and succinic (C4) acids. Oxalic acid comprises 74% of total diacids. This result suggests that photochemical production of oxalic acid is significant over the central Pacific. Spatial distributions of diacids, ω-oxoacids, pyruvic acid, α-dicarbonyls, and fatty acids together with total carbon and WSTN showed higher abundances in the eastern equatorial Pacific where the upwelling of high-nutrient waters followed by high biological productivity is common, indicating that their in situ production is important in the warmer central Pacific through photochemical oxidation from their gaseous and particulate precursors. This study demonstrates that there is a strong linkage in biogeochemical cycles of carbon in the sea-air interface via ocean upwelling, phytoplankton productivity, sea-to-air emissions of organic matter, and formation of secondary organic aerosols in the eastern equatorial Pacific. ©2016. American Geophysical Union.


Oany A.R.,Mawlana Bhashani Science and Technology University | Emran A.-A.,Mawlana Bhashani Science and Technology University | Emran A.-A.,University of Queensland | Jyoti T.P.,Khulna University
Drug Design, Development and Therapy | Year: 2014

Human coronavirus (HCoV), a member of Coronaviridae family, is the causative agent of upper respiratory tract infections and "atypical pneumonia". Despite severe epidemic outbreaks on several occasions and lack of antiviral drug, not much progress has been made with regard to an epitope-based vaccine designed for HCoV. In this study, a computational approach was adopted to identify a multiepitope vaccine candidate against this virus that could be suitable to trigger a significant immune response. Sequences of the spike proteins were collected from a protein database and analyzed with an in silico tool, to identify the most immunogenic protein. Both T cell immunity and B cell immunity were checked for the peptides to ensure that they had the capacity to induce both humoral and cell-mediated immunity. The peptide sequence from 88-94 amino acids and the sequence KSSTGFVYF were found as the most potential B cell and T cell epitopes, respectively. Furthermore, conservancy analysis was also done using in silico tools and showed a conservancy of 64.29% for all epitopes. The peptide sequence could interact with as many as 16 human leukocyte antigens (HLAs) and showed high cumulative population coverage, ranging from 75.68% to 90.73%. The epitope was further tested for binding against the HLA molecules, using in silico docking techniques, to verify the binding cleft epitope interaction. The allergenicity of the epitopes was also evaluated. This computational study of design of an epitope-based peptide vaccine against HCoVs allows us to determine novel peptide antigen targets in spike proteins on intuitive grounds, albeit the preliminary results thereof require validation by in vitro and in vivo experiments. © 2014 Oany et al.


Rahman M.M.,Jahangirnagar University | Mamun A.A.,Jahangirnagar University | Alam M.S.,Mawlana Bhashani Science and Technology University
Journal of the Korean Physical Society | Year: 2014

Positron acoustic shock waves (PASWs) in an unmagnetized four-component plasma system consisting of a cold mobile viscous positron fluid, hot positrons and electrons following the nonthermal distributions of Cairns et al. [Geophys. Res. Lett. 22, 2709 (1995)], and immobile positive ions are studied both analytically and numerically. The well-known reductive perturbation method is used to derive the Burgers equation. The basic features of the PASWs are significantly modified by the effects of the kinematic viscosity, the nonthermal electrons and hot positrons, the ratio of the electron temperature to the hot positron temperature σ, and the ratio of the hot positron (electron) number density to the cold positron number density μ 1 (μ 2). The importance of our results to various astrophysical and laboratory plasmas are concisely discussed. © 2014 The Korean Physical Society.


Rahman M.M.,Jahangirnagar University | Alam M.S.,Mawlana Bhashani Science and Technology University | Mamun A.A.,Jahangirnagar University
European Physical Journal Plus | Year: 2014

A theoretical investigation has been made on positron-acoustic (PA) Gardner solitons (GSs) and double layers (DLs) in four-component plasma system consisting of immobile positive ions, mobile cold positrons, nonthermal hot positrons, and nonthermal hot electrons. The reductive perturbation method has been used to derive Korteweg-de Vries (K-dV), modified K-dV (mK-dV), and Gardner equations. The basic features (viz. amplitude, polarity, speed, etc.) of the PA GSs as well as PA DLs are examined. The analytical comparison among K-dV solitons, mK-dV solitons, and GSs are also made. It has been identified that the amplitude, polarity, speed, thickness of such PA solitons and DLs are significantly modified due to the presence of nonthermal distributed hot electrons and hot positrons. The results of our investigation should be useful for understanding various interstellar space plasma environments (viz. ionosphere, lower part of magnetosphere, auroral acceleration regions, supernovas, pulsar environments, cluster explosions, active galactic nuclei, etc.). © 2014, Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg.


Haider M.M.,Mawlana Bhashani Science and Technology University
Contributions to Plasma Physics | Year: 2013

A theoretical investigation has been made on obliquely propagating ion-acoustic (IA) solitary structures in a three components magneto-plasma containing cold inertial ions, Boltzmann distributed positrons, and hot non-thermal electrons. The Zakharov-Kuznetsov equation has been derived by the reductive perturbation method, and its solitary wave solution has been analyzed. Multi-dimensional instability has also studied by the small-k (long wave-length plane wave) perturbation expansion technique, which is found to exist in such a plasma. The effects of the external magnetic field, nonthermal electrons, obliqueness and temperature ratio have significantly modified the basic properties of small but finite-amplitude IA solitary waves, such as amplitude, width, instability criterion and the growth rate. The present investigation contributes to the physics of the nonlinear IA waves in space and laboratory electron-positron-ion magneto-plasmas in which wave damping produces an electron tail. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Haider M.M.,Mawlana Bhashani Science and Technology University | Mamun A.A.,Jahangirnagar University
Physics of Plasmas | Year: 2012

A rigorous theoretical investigation has been made on Zakharov-Kuznetsov (ZK) equation of ion-acoustic (IA) solitary waves (SWs) and their multi-dimensional instability in a magnetized degenerate plasma which consists of inertialess electrons, inertial ions, negatively, and positively charged stationary heavy ions. The ZK equation is derived by the reductive perturbation method, and multi-dimensional instability of these solitary structures is also studied by the small-k (long wave-length plane wave) perturbation expansion technique. The effects of the external magnetic field are found to significantly modify the basic properties of small but finite-amplitude IA SWs. The external magnetic field and the propagation directions of both the nonlinear waves and their perturbation modes are found to play a very important role in changing the instability criterion and the growth rate of the unstable IA SWs. The basic features (viz., amplitude, width, instability, etc.) and the underlying physics of the IA SWs, which are relevant to space and laboratory plasma situations, are briefly discussed. © 2012 American Institute of Physics.


Khan M.A.,Bangladesh Institute of Technology | Hossain M.U.,Mawlana Bhashani Science and Technology University | Rakib-Uz-Zaman S.M.,Shahjalal University of Science and Technology | Morshed M.N.,Bangladesh Institute of Technology
Scandinavian Journal of Immunology | Year: 2015

Ebola viruses (EBOVs) have been identified as an emerging threat in recent year as it causes severe haemorrhagic fever in human. Epitope-based vaccine design for EBOVs remains a top priority because a mere progress has been made in this regard. Another reason is the lack of antiviral drug and licensed vaccine although there is a severe outbreak in Central Africa. In this study, we aimed to design an epitope-based vaccine that can trigger a significant immune response as well as to prognosticate inhibitor that can bind with potential drug target sites using various immunoinformatics and docking simulation tools. The capacity to induce both humoral and cell-mediated immunity by T cell and B cell was checked for the selected protein. The peptide region spanning 9 amino acids from 42 to 50 and the sequence TLASIGTAF were found as the most potential B and T cell epitopes, respectively. This peptide could interact with 12 HLAs and showed high population coverage up to 80.99%. Using molecular docking, the epitope was further appraised for binding against HLA molecules to verify the binding cleft interaction. In addition with this, the allergenicity of the epitopes was also evaluated. In the post-therapeutic strategy, docking study of predicted 3D structure identified suitable therapeutic inhibitor against targeted protein. However, this computational epitope-based peptide vaccine designing and target site prediction against EBOVs open up a new horizon which may be the prospective way in Ebola viruses research; the results require validation by in vitro and in vivo experiments. © 2015 John Wiley & Sons Ltd.


Haider M.M.,Mawlana Bhashani Science and Technology University
European Physical Journal D | Year: 2016

The propagation of dust-ion-acoustic solitary waves in magnetized plasmas containing opposite polarity ions, opposite polarity dusts and non-thermal electrons has been studied. The fluid equations in the system are reduced to a Korteweg-de Vries equation in the limit of small amplitude perturbation. The effect of non-thermal electrons and the opposite polarity of ions and dusts in the solitary waves are presented graphically and numerically. © 2016 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.


Rahman M.M.,Jahangirnagar University | Alam M.S.,Mawlana Bhashani Science and Technology University | Mamun A.A.,Jahangirnagar University
Astrophysics and Space Science | Year: 2014

A theoretical investigation has been performed on the nonlinear propagation of nonplanar (cylindrical and spherical) Gardner solitons (GSs) associated with the positron-acoustic (PA) waves in a four component plasma system consisting of nonthermal distributed electrons and hot positrons, mobile cold positrons, and immobile positive ions. The well-known reductive perturbation method has been employed to derive the modified Gardner (MG) equation. The basic features (viz. amplitude, polarity, speed, etc.) of nonplanar PA Gardner solitons (GSs) have been examined by the numerical analysis of the MG equation. It has been observed that the properties of the PA GSs in a nonplanar geometry differ from those in a planar geometry. It has been also investigated that the presence of nonthermal (Cairns distributed) electrons and hot positrons significantly modify the amplitude, polarity, speed, and thickness of such PA GSs. The results of our investigation should play an important role in understanding various interstellar space plasma environments as well as laboratory plasmas. © 2014 Springer Science+Business Media Dordrecht.

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