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Investigation of adequate closed form travelling wave solution to the space-time fractional non-linear evolution equations

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Journal of Ocean Engineering and Science 2022年第3期7卷 292-303页

作者： Mohammad Asif Arefin M.Ayesha khatun M.Hafiz Uddin Mustafa Inc Department of Mathematics Jashore University of Science and TechnologyJashore 7408Bangladesh Department of Computer Engineering Biruni UniversityIstanbulTurkey Department of Mathematics Science FacultyFirat UniversityElazigTurkey Department of Medical Research China Medical University HospitalChina Medical UniversityTaichungTaiwan

This work aims to construct exact solutions for the space-time fractional(2+1)-dimensional dispersive longwave(DLW)equation and approximate long water wave equation(ALW)utilizing the twovariable(G′/G,1/G)-expansion method and the modified Riemann-Liouville fractional *** recommended equations play a significant role to describe the travel of the shallow water *** fractional complex transform is used to convert fractional differential equations into ordinary differential *** wave solutions have been successfully achieved using the proposed approach and the symbolic computer Maple *** Maple package program was used to set up and validate all of the computations in this *** choosing particular values of the embedded parameters,we pro-duce multiple periodic solutions,periodic wave solutions,single soliton solutions,kink wave solutions,and more forms of soliton *** achieved solutions might be useful to comprehend nonlinear *** is worth noting that the implemented method for solving nonlinear fractional partial dif-ferential equations(NLFPDEs)is efficient,and simple to find further and new-fangled solutions in the arena of mathematical physics and coastal engineering.

关键词： Riemann-Liouville fractional derivative Space-time fractional(2+1)-dimensional dispersive long wave equation Approximate long water wave equation Wave transformation The two-variable(G′/G,1/G)-expansion method

Review on recent trends and prospects in π-conjugated luminescent aggregates for biomedical applications

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Aggregate

Aggregate 2022年第5期3卷 26-58页

作者： Debasish Barman Kavita Narang Retwik Parui Nehal Zehra Mst Nasima khatun Laxmi Raman Adil Parameswar Krishnan Iyer Department of Chemistry School of Health Science and TechnologyCentre for NanotechnologyIndian Institute of Technology GuwahatiGuwahatiIndia

Metal-free organic molecules with structurally diverse aggregation-induced emission(AIE)behavior and new functional photophysical properties reveal unique structure-property relationships,especially bright luminescence,and have attracted extensive attention in the past few *** tremendous progress on fluorescent molecules development,the extended π-conjugated organic AIE probes with their nanorange self-assembly,coassembly,unique morphology,high biocompatibility,and light-harvesting capabilities enable them as potential candidates in numerous translational application *** particular,a few important classes of AIE light up small molecules,supramolecules,oligomers,polymers,including nanoparticles and photosensitizer molecules,with their emerging properties of thermally activated delayed fluorescence,room temperature phosphorescence,including emission switching stimuli-responsive behavior and multifunctional properties,have been boosted by the rare features of aggregation at their condensed or solid *** review highlights salient features of AIE-based emitters,encompassing molecular design strategies,stimulating photophysical properties,mechanistic aspects,and their efficacy in various electronic and biomedical applications,broadly covering properties of small molecules to oligomers,macromolecules to polymers.

关键词： aggregation-induced emission macromolecules photosensitizers polymers room temperature phosphorescence small molecules thermally activated delayed fluorescence

Characterization of Vacuum Ultraviolet (VUV) Radiation for the Development of a Fluorescent Lamp

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Plasma Science and Technology 2011年第4期13卷 480-485页

作者： Hasina khatun A.K.SHARMA P.K.BARHAI Microwave Tubes Area Central Electronics Engineering Research Institute Applied Physic Department Birla Institute of Technology

A negative unipolar pulsed voltage is applied to study internal electrical parameters of the xenon filled dielectric barrier discharge （DBD） sources. The VUV radiation emitted from these sources is characterized by means of the photoluminescence intensity of the red phosphor pellet. The red phosphor converts the VUV radiation into visible radiation and the emission spectra include a peak at 619.56 nm. The emission characteristics of the red phosphor are analyzed in terms of the pressure-distance （pd）, rise time and frequency of the pulsed voltage waveform. The emission intensity measured at different operational conditions confirms that the formation and decay of the xenon excimer, Xe2^＊, increase with the increase in reduced electric field, E/N. After exceeding certain limits of E/N, the intensity of Xe2^＊ decreases rapidly.

关键词： dielectric barrier discharge vacuum ultraviolet photoluminescence RGB

Comparative study of Mo2Ga2C with superconducting MAX phase Mo2GaC： First-principles calculations

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Chinese Physics B 2017年第3期26卷 297-302页

作者： M A Ali M R khatun NJahan M M Hossain Department of Physics Chittagong University of Engineering and Technology Chittagong 4349 Bangladesh Department of Physics University of Rajshahi Rajshahi 6205 Bangladesh

The structural, electronic, optical and thermodynamic properties of Mo2Ga2C are investigated using density func- tional theory （DFT） within the generalized gradient approximation （GGA）. The optimized crystal structure is obtained and the lattice parameters are compared with available experimental data. The electronic density of states （DOS） is calculated and analyzed. The metallic behavior for the compound is confirmed and the value of DOS at Fermi level is 4.2 states per unit cell per eV. Technologically important optical parameters （e.g., dielectric function, refractive index, absorption coefficient, photo conductivity, reflectivity, and loss function） are calculated for the first time. The study of dielectric constant （ε1） indicates the Drude-like behavior. The absorption and conductivity spectra suggest that the compound is metallic. The reflectance spectrum shows that this compound has the potential to be used as a solar reflector. The thermodynamic properties such as the temperature and pressure dependent bulk modulus, Debye temperature, specific heats, and thermal expansion coefficient of Mo2Ga2C MAX phase are derived from the quasi-harmonic Debye model with phononic effect also for the first time. Analysis of Tc expression using available parameter values （DOS, Debye temperature, atomic mass, etc.） suggests that the compound is less likely to be superconductor.

关键词： first-principles calculations density of states (DOS) optical properties thermodynamic properties

Modelling the potential risk zone of Lantana camara invasion and response to climate change in eastern India

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Ecological Processes 2022年第1期11卷 142-154页

作者： Sharad Tiwari S.N.Mishra Dharmendra Kumar Basant Kumar S.N.Vaidya Brojo Gopal Ghosh Sk Mujibar Rahaman Masjuda khatun Sanjoy Garai Amit Kumar Institute of Forest Productivity LalgutwaRanchi 835303JharkhandIndia Department of IT Govt.of JharkhandJharkhand Space Application CentreRanchiIndia Department of Geoinformatics Central University of JharkhandRanchi 835205JharkhandIndia

Background:The aim of this study is to elucidate the potential risk zones prone to the invasion of perennial ornamental plant Lantana camara,which is native to South America and has invasive tendency in Jharkhand,eastern India,for present(2020)and the future(2050)climatic conditions under four different Representative Concentration Pathways scenarios(RCPs).We analysed the current distribution pattern of *** in the plateau region of eastern India and identified potentially suitable habitats prone to its further infestation in the future under the climate change ***:Results showed the presence of *** invasion in~13%of the geographical area of Jharkhand,Cho-tanagpur plateau which may expand up to 20–26%by 2050 depending upon emission scenarios as characterised by the four *** for the current scenario suggests the dominance of *** in sub-zone V(12.77%under high risk zones(HRZ)and 9.5%under critical risk zones(CRZ))followed by sub-zones IV(6.7%:HRZ;4.19%:CRZ)and VI(2.49%:HRZ;2.14%:CRZ).Future projection(2050)indicates a possible expansion of its distribution range across all agro-climatic sub-zones with dominance in sub-zones V and *** Bio_4(temperature seasonality)was observed as the most contributing factor for the distribution of *** for current and future scenarios across all *** habitat for *** mostly occurred under natural vegetation(66.05%of CRZ and 60.71%of HRZ)and agriculture landscape(29.51%of CRZ and 34.48%of HRZ).Conclusions:The study provides an insight of invasion of *** in the plateau region of eastern India,and reveals wide distribution across all the agro-climatic sub-zones of Jharkhand,mostly in open and disturbed areas under natural vegetation and agriculture *** projections for the year 2050 suggest a continuous increase in the expansion range of invasion across Jharkhand and call for urgent initiatives to combat its further invasion.

关键词： Climate change Forest Invasion Lantana camara Maxent RCPs

iLBE for Computational Identification of Linear B-cell Epitopes by Integrating Sequence and Evolutionary Features

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Genomics, Proteomics & Bioinformatics 2020年第5期18卷 593-600页

作者： Md.Mehedi Hasan Mst.Shamima khatun Hiroyuki Kurata Department of Bioscience and Bioinformatics Kyushu Institute of TechnologyIizukaFukuoka 820-8502Japan Biomedical Informatics R&D Center Kyushu Institute of TechnologyIizukaFukuoka 820-8502Japan

Linear B-cell epitopes are critically important for immunological applications,such as vaccine design,immunodiagnostic test,and antibody production,as well as disease diagnosis and *** accurate identification of linear B-cell epitopes remains challenging despite several decades of *** this work,we have developed a novel predictor,Identification of Linear B-cell Epitope(i LBE),by integrating evolutionary and sequence-based *** successive feature vectors were optimized by a Wilcoxon-rank sum *** the random forest(RF)algorithm using the optimal consecutive feature vectors was applied to predict linear B-cell *** combined the RF scores by the logistic regression to enhance the prediction *** yielded an area under curve score of 0.809 on the training dataset and outperformed other prediction models on a comprehensive independent *** is a powerful computational tool to identify the linear B-cell epitopes and would help to develop penetrating diagnostic tests.A web application with curated datasets for iLBE is freely accessible at http://***/iLBE/.

关键词： Linear B-cell epitope BLAST Feature encoding Feature selection Random forest

Dielectric,impedance,modulus spectroscopy and AC conductivity studies on novel organic ferroelectric diisopropylammonium chloride(dipaCl)

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Journal of Advanced Dielectrics 2021年第4期11卷 18-26页

作者： Mamataj khatun Ekramul Kabir Department of Physics Aliah UniversityNewtown Campus Kolkata 700160India Department of Physics Darjeeling Govt.College Darjeeling 734101India

Organic molecular ferroelectric diisopropylammonium chloride(dipaCl)was successfully synthesized using diisopropylamine,hydrochloric acid(57%)and methanol *** permittivity,impedance,modulus spectroscopy and conductivity were systematically studied by Capacitance-Conductance(CP-G)measurements in the temperature range of 373-445 *** property tests clearly show that the organic molecular ferroelectric dipaCl obeys Curies-Weiss law 1/e=(T-T0)/*** real(Z′)and imaginary(Z″)parts of the electrical modulus were calculated from the various values of e′and e″.It is shown that AC conductivity satisfies the relation s(w)∞wn,where the power exponent n depends on temperature and *** Arrhenius equation,the activation energies Es and Eh are also calculated which describes the complete conduction mechanism of dipaCl.

关键词： Molecular ferroelectrics dielectric spectroscopy impedance spectroscopy conductivity

Antinociceptive Effect of Methanol Extract of Diospyros malabarica (Desr.) Kostel Leaves in Mice

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Pharmacology & Pharmacy 2023年第9期14卷 388-406页

作者： Md. Azim Uddin Ambia khatun Md. Abdul Mannan Department of Pharmacy Stamford University Bangladesh Dhaka Bangladesh

Background: Diospyros malabarica (Desr.) Kostel, a small to medium-sized tree in the Ebenaceae family, is known as “Deshi Gab” in Bangladesh. Fever, diabetes, snake bite, diarrhea, biliousness, and ulcer ailments are all treated with the herb. This study’s goal was to examine in mouse models the antinociceptive properties of methanol extract of Diospyros malabarica leaves (MEDM). Methods: For the purpose of determining the antinociceptive activity in mice, five distinct pain models including hot plate, tail immersion, acetic acid-induced writhing, formalin and glutamate-induced nociception tests were used. The conventional medications were morphine sulphate (5 mg/kg, intraperitoneally) and diclofenac sodium (10 mg/kg, intraperitoneally). While the control group was expecting deionized water, MEDM was given orally at dosages of 200, 400, and 600 mg/kg (0.1 mL/mouse, orally). Results: According to the current research, MEDM strongly reflected the antinociceptive activity of all mouse models of chemical and heat-induced pain (*p < 0.05). 400 and 600 mg/kg demonstrated a considerable (*p < 0.05) ability to prolong the reaction of latency to pain in opposition to thermally produced nociception in hot plate and tail immersion tests. Inhibition levels in the acetic acid-induced writhing test were 11.57%, 37.77%, and 51.83%, respectively. The extract suppressed 20.78%, 45.48%, and 56.93% of licking during the initial stages of formalin-induced nociception. In the late phase, the extract showed higher rates of licking than the control group (13.14%, 50.28%, and 66.85%). The glutamate-induced nociception test was significantly (*p < 0.05) prevented by the plant extract. Compared to the control, it demonstrated an inhibition of licking of 22.85%, 47.32%, and 63.42%, respectively. Conclusions: It is evident that the plant extract has exceptional analgesic properties. To determine the precise processes behind antinociceptive effect and to identify the substances that produce thi

关键词： Diospyros malabarica Extract Antinociceptive Pain

L-carnitine improves developmental competence of buffalo oocytes in vitro

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Asian pacific Journal of Reproduction 2022年第5期11卷 236-242页

作者： Avijit Kumar Modak Md Nuronnabi Islam Asma khatun Md Hasanur Alam Ireen Akter AKM Ahsan Kabir Md Abul Hashem Mohammad Moniruzzaman Department of Animal Science Bangladesh Agricultural UniversityMymensingh-2202Bangladesh

Objective:To investigate the effect of L-carnitine on in vitro maturation and subsequent in vitro embryo production of buffalo ***:Cumulus oocyte complexes(COCs)were aspirated from ovaries of slaughtered *** were classified into good and fair qualities based on morphological observation of numbers and integrity of cumulus cells surrounding the *** categories of COCs were placed in in vitro maturation medium with supplementation of different concentrations(0,0.250,0.375 or 0.500 mg/mL)of *** from both qualities were in vitro fertilized and in vitro cultured for 7 days,to examine the developmental ***:Supplementation of L-carnitine to in vitro maturation medium increased the cumulus cell expansion rate of COCs to grade A,and reduced the cumulus cell expansion of COCs to grade B and grade C in both good and fair quality ***,L-carnitine induced the in vitro meiotic progression of buffalo oocytes to metaphaseⅡin both good and fair quality ***,L-carnitine reduced the rate of oocyte degeneration in both good and fair quality oocytes.L-carnitine increased the rate of cleaved formation at day 2 and blastocyst formation at day 7 during in vitro culture in both qualities of ***,a higher rate of blastocyst production was observed in L-carnitine-treated fair quality oocytes,which was higher than the results in the untreated good quality ***:L-carnitine enhances meiotic maturation and subsequent embryo development from both good and fair quality buffalo oocytes.

关键词： Buffalo Cumulus oocyte complex Embryo In vitro maturation In vitro fertilization L-carnitine