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RISS 인기검색어
- 검색키워드
- 저자 : Mohammad Faruk Hossain (검색결과 5 건)
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Hossain, Mohammad Faruk,Yin, Junli,Park, Jae-Yeong Institute of Pure and Applied Physics 2014 Japanese Journal of Applied Physics Vol. No.
<P>Electro-chemically synthesized nickel hydroxide Ni(OH)(2) on reduced graphene oxide (RGO) made from graphene oxide (GO) has been investigated as electrode materials for electrical energy storage applications. The electrochemical deposition of Ni(OH)(2) on highly hybridized RGO was more effective to improve the catalytic activity of electrode and to increase the capacity performance of the overall system. By virtue of the unique two-dimensional nanostructure of RGO, the as-obtained Ni(OH)(2) was closely protected by RGO, effectively suppressing their microstructural degradation during the charge and discharge processes, and enabling an enhancement in cycling capability. Electrochemical measurements demonstrated that the specific capacitance of the as-obtained supercapacitor is high as 729mF/cm(2) and power density of 1.5 mW/cm(2). The electrical conductivity of RGO was determined to be 104 S/cm. In addition, there was no marked decrease in capacitance at a constant current density after 200 cycles, suggesting excellent long-term cycling stability. (C) 2014 The Japan Society of Applied Physics</P>
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Mohammad Omar Faruk Murad,Zamri Chik,B. M. Nural Absar,Kamal Hossain Shikdar,Khairul Anuar Mohd Nayan 대한토목학회 2016 KSCE Journal of Civil Engineering Vol.20 No.6
In this study a full scale 3D analysis of post-tensioned box section and pre-tensioned inverted T-girder section is carried out by considering only vertical loadings. The aim of this research is to investigate long span box Girder Bridge with pre-tensioned inverted T-girder using splicing technique. 4 lanes of 150m long (3 spans @ 50 m) post-tensioned box girder bridge with 12 cells and 13.54 m wide deck is considered as the bridge model and that the equivalent box section consists of 13 numbers of inverted pre-tensioned girder having two different lengths spliced at the points of inflection of continuous length of the bridge. The inverted T-girders are used to support the deck panel with superimposed load on it. The structural analysis of the bridge is done using CSi Bridge employing Integrated 3D Bridge Design Software based on finite element method for both longitudinal and transverse direction. In the analysis, AASHTO LRFD-2006 is used by subjecting Uniformly Distributed Load (UDL), edge loads, knife edge loads, and heavy vehicles load on the bridge deck. Moving vehicles load is placed at different locations to determine the maximum and minimum moments, stresses and flexural effects. Actual post-tensioned box section flexure, shear, torsion and stress in both longitudinal and transverse analyses showed lower values when compared to pre-tensioned inverted T-girder section. Assuming monolithic behaviour, the actual box section provided better stiffness rather than equivalent one. Nevertheless composite behaviour of the equivalent section can be accepted as an alternative solution for long span continuous box Girder Bridge where cost is a major factor in particular.
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Barman, Sharat Chandra,Hossain, Mohammad Faruk,Park, Jae Yeong Elsevier 2018 Journal of Electroanalytical Chemistry Vol.824 No.-
<P><B>Abstract</B></P> <P>In this study, highly catalytic platinum nanoparticles (PtNPs) were synthesized on polished Au thin-film electrode using surfactant assisted electrochemical technique (SAET) for a high-performance non-enzymatic glucose sensor. Residual surfactants on the fabricated electrodes were removed by dipping into a tetrahydrofuran (THF) solution. The physical characteristics of the electrodes were investigated through FESEM, XRD, and EDX, and the analytical analyses were demonstrated with cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and amperometry. After optimization considering the NP deposition potential and time, dipping time in THF, the fabricated biosensor showed a promising electro-oxidation towards glucose in terms of high sensitivity of 5.87 ± 0.13 μAmM<SUP>−1</SUP> cm<SUP>−2</SUP>, detection limit of 0.235 μM, wide linear range from 0.25–36 mM, fast response lower than 5 s, and good reproducibility and stability. The proposed SAET can be applied to uniform deposition and dispersion of other nanoparticles for numerous applications. Therefore, the proposed sensing platform can be useful to monitor glucose in diagnostic bioprocess monitoring and environmental monitoring.</P> <P><B>Highlights</B></P> <P> <UL> <LI> PtNPs has been newly synthesized by using soft surfactant PS-b-PEO. </LI> <LI> High dispersion of PtNPs on the surface of electrode was obtained using SAET. </LI> <LI> Optimum removal of surfactant by sinking in THF for 20 min at 40 °C. </LI> <LI> High sensitivity of 10.87 μAmM<SUP>−1</SUP> cm<SUP>−2</SUP>, limit of detection is 0.235 μM, and fast response <5 s. </LI> <LI> Wide linear range from 0.5 to 36 mM, good reproducibility, and stability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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A bioinformatics approach to characterize a hypothetical protein Q6S8D9_SARS of SARS-CoV
Md Foyzur Rahman,Rubait Hasan,Mohammad Shahangir Biswas,Jamiatul Husna Shathi,Md Faruk Hossain,Aoulia Yeasmin,Mohammad Zakerin Abedin,Md Tofazzal Hossain Korea Genome Organization 2023 Genomics & informatics Vol.21 No.1
Characterization as well as prediction of the secondary and tertiary structure of hypothetical proteins from their amino acid sequences uploaded in databases by in silico approach are the critical issues in computational biology. Severe acute respiratory syndrome-associated coronavirus (SARS-CoV), which is responsible for pneumonia alike diseases, possesses a wide range of proteins of which many are still uncharacterized. The current study was conducted to reveal the physicochemical characteristics and structures of an uncharacterized protein Q6S8D9_SARS of SARS-CoV. Following the common flowchart of characterizing a hypothetical protein, several sophisticated computerized tools e.g., ExPASy Protparam, CD Search, SOPMA, PSIPRED, HHpred, etc. were employed to discover the functions and structures of Q6S8D9_SARS. After delineating the secondary and tertiary structures of the protein, some quality evaluating tools e.g., PROCHECK, ProSA-web etc. were performed to assess the structures and later the active site was identified also by CASTp v.3.0. The protein contains more negatively charged residues than positively charged residues and a high aliphatic index value which make the protein more stable. The 2D and 3D structures modeled by several bioinformatics tools ensured that the proteins had domain in it which indicated it was functional protein having the ability to trouble host antiviral inflammatory cytokine and interferon production pathways. Moreover, active site was found in the protein where ligand could bind. The study was aimed to unveil the features and structures of an uncharacterized protein of SARS-CoV which can be a therapeutic target for development of vaccines against the virus. Further research are needed to accomplish the task.
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