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Infrared Spectroscopic Analysis of Chrysene and 1.2-Benzanthracence in Wax films

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Chinese Physics Letters 2006年第9期23卷 2407-2410页

作者： md. Naziruddin Khan A. S. AI-Dwayyan Z. H. Zaidi Department of Applied Sciences A1-Falah School of Engineering and Technology Dhauj Faridabad-Haryana-121004 India Department of Physics College of Science King Saud University Riyadh KSA Department of Physics Jamia Millia Islamia New Delhi-25 India

Chrysene and 1.2-benzanthracene are successfully doped in a solid wax film and their vibrational spectra in gooo--400cm^-1 are discussed. The harmonic frequencies and relative intensities of both the molecules observed in the film are compared with theoretical values calculated by the density functional theory （DFT） model as well as with the previous experimental data. The effects on spectra due to change of matrix and some additional bands observed in the wax film are also reported. Excellent agreement in the spectral positions and strengths between the experiments and DFT values are found.

关键词： POLYCYCLIC AROMATIC-HYDROCARBONS EMISSION SPECTRA MOLECULES NAPHTHALENE HYPOTHESIS EXCITATION CATIONS BANDS

2D Nanomaterials for Effective Energy Scavenging

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Nano-Micro Letters 2021年第5期13卷 151-191页

作者： md.Al Mahadi hasan Yuanhao Wang Chris R.Bowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro‑Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China SUSTech Engineering Innovation Center School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055People’s Republic of China Department of Mechanical Engineering University of BathBath BA27AKUK School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China

The development of a nation is deeply related to its energy consumption.2D nanomaterials have become a spotlight for energy harvesting applications from the small-scale of low-power electronics to a large-scale for industry-level applications,such as self-powered sensor devices,environmental monitoring,and large-scale power *** from around the world are working to utilize their engrossing properties to overcome the challenges in material selection and fabrication technologies for compact energy scavenging devices to replace batteries and traditional power *** this review,the variety of techniques for scavenging energies from sustainable sources such as solar,air,waste heat,and surrounding mechanical forces are discussed that exploit the fascinating properties of 2D *** addition,practical applications of these fabricated power generating devices and their performance as an alternative to conventional power supplies are discussed with the future pertinence to solve the energy problems in various fields and applications.

关键词： 2D nanomaterials Solar energy Tribo-/piezo-/thermo-/pyro-electricity Osmotic power generation Self-powered sensor

Evaluation of Economical and Ecological Aspects of Denim Garments Dyeing with Fluorescent Dye

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Journal of Materials Science and Chemical Engineering 2013年第7期1卷 1-6页

作者： Muhammad Abdur Rashid md. Delwar Hossain Muhammad Mufidul Islam md. Nakib-Ul-hasan Department of Textile Engineering Dhaka University of Engineering & Technology (DUET) Gazipur Bangladesh Department of Textile Engineering Northern University Bangladesh Dhaka Bangladesh

In this study the existing process (3 steps) and proposed process (2 steps) were evaluated during dyeing of denim fabric with fluorescent dye. It compared the effectiveness of these two processes of fluorescent dyeing in the textile industry. Here at first the grey denim fabric was pretreated by scouring and bleaching. Then the fabric was dyed in existing process i.e. through catanizing, dyeing and binding at 10% and 15% shades. Again the pretreated fabric was dyed in proposed process i.e. through catanizing and (dyeing and binding) with same shades. Then the properties of two types of dyed fabric were compared. This study provides a set of experimental results, discussion and comparison between the two processes. The results show that the proposed process has less power and time consumption and more water savings compared to existing process. So the evaluation reflected that the proposed process was much more effective than existing process of denim dyeing with fluorescent dye.

关键词： Fluorescent Dyestuff Denim Fabric Fastness Properties

Structural Damage Localization by Linear Technique of Acoustic Emission

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Open Journal of Fluid Dynamics 2014年第5期4卷 425-432页

作者： md. Tawhidul Islam Khan Nagafuchi Sunichi Mehedi hasan Department of Advanced Technology Fusion Saga University Saga Japan Department of Mechanical Engineering CUET Chittagong Bangladesh

Linear source location of acoustic emission (AE) technique has been applied in the present paper for finding the source of material damage under fatigue loading. A plate type structure of ductile cast iron has been used to undergo fatigue damage in a servopulsing machine in the experiment. AE sensors were attached to the specimen for getting the time delay of AE signal propagations through the specimen. After receiving the time delay data of AE signals due to the damage initiation in the material for the provided fatigue loads, linear source location algorithm has been applied and the crack positions are identified. Before applying the technique, a series of pencil lead breaks (PLBs) tests have been conducted upon a ductile cast iron plate of same dimension for verifying the applied algorithm. According to the PLBs varification, the failure location of ductile cast iron (pearlite type) due to the fatigue loading has been characterized. In both experiments, the active ability of the proposed technique for source location of structural damage has been identified clearly and successfully.

关键词： Structural Damage Linear Source Location Technique Acoustic Emission

Genome-wide identification,characterization and functional prediction of the SRS gene family in sesame(Sesamum indicum L.)

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Oil Crop Science 2024年第2期9卷 69-80页

作者： Farjana Afroz Susmi Tasmina Islam Simi md.Nahid hasan md.Abdur Rahim Department of Genetics and Plant Breeding Sher-e-Bangla Agricultural UniversityDhaka1207Bangladesh

Sesame(Sesamum indicum L.)is an ancient oilseed crop of the Pedaliaceae family with high oil content and potential health *** RELATED SEQUENCE(SRS)proteins are the transcription factors(TFs)specific to plants that contain RING-like zinc finger domain and are associated with the regulation of several physiological and biochemical *** also play vital roles in plant growth and development such as root formation,leaf development,floral development,hormone biosynthesis,signal transduction,and biotic and abiotic stress ***,the SRS gene family was not reported in sesame *** this study,identification,molecular characterization,phylogenetic relationship,cis-acting regulatory elements,protein-protein interaction,syntenic relationship,duplication events and expression pattern of SRS genes were analyzed in *** identified total six SiSRS genes on seven different linkage groups in the *** genome by comparing with the other species,including the model plant Arabidopsis *** SiSRS genes showed variation in their structure like2–5 exons and 1–4 *** other species,SiSRS proteins also contained‘RING-like zinc finger'and‘LRP1'***,the SiSRS genes were clustered into subclasses via phylogenetic analysis with proteins of ***,***,and some other plant *** cis-acting regulatory elements analysis revealed that the promoter region of SiSRS4(SIN_1011561)showed the highest 13 and 16 elements for light-and phytohormone-responses whereas,SiSRS1(SIN_1015187)showed the highest 15 elements for *** ABREs,or ABA-responsive elements,were found in a maximum of 8 copies in the SiSRS3(SIN 1009100).Moreover,the available RNA-seq based expression of SiSRS genes revealed variation in expression patterns between stress-treated and non-treated samples,especially in drought and salinity conditions *** SiSRS genes like SiSRS1(SIN_1015187)and SiSRS5(SIN_1021065),also exhibited variabl

关键词： SiSRS gene family SHI Transcription factor Characterization Sesamum indicum

Spatial and seasonal distribution of intertidal macrobenthos with their biomass and functional feeding guilds in the Naf River estuary, Bangladesh

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Journal of Oceanology and Limnology 2019年第3期37卷 1010-1023页

作者： md. Abu NOMAN MAMUNUR Rashid M SHAHANUL Islam M. Belal HOSSAIN College of Marine & Environmental Science Tianjin University of Science and TechnologyTianjin 300072China Department of Fisheries and Marine Science Noakhali Science and Technology UniversityBangladesh Faculty of Food Engineering and Biotechnology Tianjin University of Science and TechnologyTianjin 300457China

The Naf River estuary is one of the most productive ecological ecosystems in Bangladesh providing an important feeding area for fishes and other aquatic ***,detailed information on macrobenthic communities is rarely available in this *** study focused on the seasonal and spatial variability of macrobenthic community structure with their biomass and functional *** total,fortyseven taxa were identified under nine major groups and seven functional feeding *** macrobenthic taxa,Polychaeta was dominant in both seasons and all over the estuary contributing 60%of total *** mean abundance of macrobenthos was higher during the pre-monsoon(2 972±1 994 inds./m^2)than the monsoon(1 572±361 inds./m^2)being maximum at mid-estuary region and minimum at upper and lower estuary *** the diversity indices,density(P=0.01,P=0.003),the number of taxa(P=0.000 3,P=0.000 9)and Margalef′s Index(P=0.000 4,P=0.001)of macrobenthos were significantly different among stations and ***-Weiner index(P=0.009,P=0.12)and Pielou’s evenness index(P=0.03,P=0.14)had significant differences among stations but not among *** analysis suggested that distribution of macrofauna is strongly influenced by *** the feeding types,carnivorous were found to be dominant at the upper and mid-estuarine regions,and herbivorous were at lower estuarine *** species were dominant in both *** have shown to be the most abundant feeding type in terms of biomass though herbivores were highest during monsoon.

关键词： macrobenthos seasonal variation spatial variation feeding guilds biomass Naf River estuary

A Critical Evaluation of the Role of Routine Uses of Statin as a Tool for Primary Prevention of Cardiovascular Diseases

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Open Journal of Preventive Medicine 2016年第4期6卷 133-142页

作者： Irtiza hasan Tasnuva Rashid md. Harun Ur Rashid Bhuiyan Cardiology Canterbury Christ Church University Kent UK Internal Medicine The University of Edinburgh Edinburgh UK Department of Epidemiology School of Public Health The University of Texas HSC Houston TX USA Clinical & Interventional Cardiology Z. H. Sikder Cardiac Care & Research Centre Dhaka Bangladesh

Use of Statin is a cornerstone in modern day medical practice and an essential component for primary prevention of cardiovascular diseases (CVD). Various evidences exemplify and resonate the importance of Statins in reducing CVD mortality and improvement of survivability. However, there is a continental variation in recent guidelines directing lipid-lowering therapy in regards to aim, dose, timing as well as the protocol for initiation of therapy. Similar uncertainties exist with regards to the generalizability of the finding from available evidence, a variation of benefits of Statin with respect to age and gender, the validity of the research conducted and actual gain in survivability and mortality benefits. Thus, there is a need for looking at the actual indications, risk-benefit ratios and cost effectiveness before tediously prescribing Statin for the primary prevention of CVDs. This paper will attempt to critically review the evidence behind the uses of Statins in the primary prevention of CVDs.

关键词： Statin Cholesterol Cardiovascular Diseases Primary Prevention

Characterization of subgrade soil mixed with recycled asphalt pavement

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Journal of Traffic and Transportation Engineering(English Edition) 2018年第3期5卷 207-214页

作者： md.Mehedi hasan md.Rashadul Islam Rafiqul A.Tarefder Department of Civil Engineering University of New Mexico Civil Engineering Technology Colorado State University-Pueblo

Due to awareness to greener environment, use of recycled asphalt material has become popular in asphalt pavement industry. The use of recycled asphalt pavement （RAP） ma- terials in subgrade soil can be an additional scope of utilizing RAP. This study investigates the effect of RAP on the resilient modulus （MR） of subgrade soils mixed with RAP materials. Note that MR is the principal material input parameter for designing asphalt pavement using the recent mechanistic-empirical pavement design software. As a first step of the current study, different percentages of RAP and moisture were thoroughly mixed with subgrade soils. Then, the MR of these RAP mixed soils were determined using the AASHTO T 307 （1999） at different stress levels in the laboratory. Results show that the MR of RAP mixed soil increases with the applied deviatoric and bulk stresses, however, it is less sensitive to applied confining pressure. Use of RAP materials has made the soils stiff enough not to respond to the confining pressure. As expected, the MR value reaches a maximum at the optimum moisture content and increases linearly with RAP content. The MR values and characteristics of the RAP mixed subgrade soils, as determined by the current study, can be used for subgrade design and stabilization using RAP for better pavement design.

关键词： Subgrade Recycled asphalt pavement Moisture Resilient modulus Stress

Overview of an Emerging Coronavirus Infection, COVID-19: Current Status of Vaccine Development and Therapeutics

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Pharmacology & Pharmacy 2021年第1期12卷 25-41页

作者： md. Sohel Rana md. Maruf hasan md. Eshak Enan Fatema-Tuz Zohora A. T. M. Zafrul Azam Department of Pharmacy Faculty of Pharmacy University of Dhaka Dhaka Bangladesh Department of Pharmacy Primeasia University 9 Banani C/A Dhaka Bangladesh

Coronavirus infectious disease 2019 (COVID-19) first reported in Wuhan, China, causes serious respiratory illnesses such as lung failure and pneumonia. Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) the pathogenic agent of COVID-19 has been confirmed as a novel coronavirus. WHO announced COVID-19 a global pandemic and now the whole world is eagerly waiting for vaccines and therapeutic treatment to get rid of this unstoppable coronavirus. As COVID-19 infection, a global threat creates unwanted human casualties and serious economic loss. To stop the ongoing uncontrolled situation researchers are racing to develop prevention and treatment strategies. Vaccines of different countries are in clinical and preclinical trials and the repurposed-drugs are providing to find out a positive result against COVID-19. The report is an analysis of published information focusing