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Search Results: 1 - 10 of 4694 matches for " Md. Israt Rayhan "
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Md. Rashedul Hoque,Dr. Md. Israt Rayhan
Russian Journal of Agricultural and Socio-Economic Sciences , 2012,
Abstract: Banking sector of Bangladesh is flourishing and contributing to its economy. In this aspect measuring efficiency is important. Data Envelopment Analysis technique is used for this purpose. The data are collected from the annual reports of twenty four different banks in Bangladesh. Data Envelopment Analysis is mainly of two types - constant returns to scale and variable returns to scale. Since this study attempts to maximize output, so the output oriented Data Envelopment Analysis is used. The most efficient bank is one that obtains the highest efficiency score.
Factors Causing Malnutrition among under Five Children in Bangladesh
Md. Israt Rayhan,M. Sekander Hayat Khan
Pakistan Journal of Nutrition , 2006,
Abstract: The nutritional status of under five children is a sensitive indicator of a country`s health status as well as economic condition. This study investigated differential impact of some demographic, socio-economic, environmental and health related factors on nutritional status among under five children in Bangladesh. The study used Bangladesh Demographic and Health Survey 1999-2000 (BDHS 1999-2000) data. Bivariate analysis and multivariate analysis (Cox`s linear logistic regression model) were used to identify the determinants of under-five malnutrition. The analyses revealed that 45 percent of the children under age five were suffering from chronic malnutrition, 10.5 percent were acutely malnourished and 48 percent had under-weight problem. The main contributing factors for under five malnutrition were found to be previous birth interval, size at birth, mother`s body mass index at birth and parent`s education.
Coping with Floods: Does Rural-Urban Migration Play any Role for Survival in rural Bangladesh?
Journal of Identity and Migration Studies , 2007,
Abstract: At the time of flooding, rural people in Bangladesh cannot manage thelingering effects of labor market disruptions, price fluctuations, and consumption deficiency. As a consequence, kin groups, lineages or even entire villages shift from their home to nearby big urban areas. To assess the efficacy of migration, a cross sectionalhousehold survey was carried out two weeks after a flood in four districts of Bangladesh in the year 2005. In total, 595 rural households were interviewed based on fully structured questionnaires. The results show that the decision to migrate is often guided by the aspiration to replenish asset values damaged by the flood. Thus, rural-urban migration emerges as a source of credit. Inclusion of social networks plays an important role duringflood crisis to get information about the host areas. In financing livelihoods during floods, landless or poor people incur informal debts from the money lenders; this in turn accumulated by the consecutive years of flooding, leave a shadow of default and liquidation over many vulnerable households. The rural-urban migration allows potentially vulnerable households to avoid a debt cycle.
Alcohol Sensing through Photonic Crystal Fiber at Different Temperature  [PDF]
Etu Podder, Rayhan Habib Jibon, Md. Bellal Hossain, Abdullah Al-Mamun Bulbul, Sagor Biswas, Md. Anamul Kabir
Optics and Photonics Journal (OPJ) , 2018, DOI: 10.4236/opj.2018.810026
Abstract: This paper presents the investigation of relative sensitivity profile of Alcohol through Photonic Crystal fiber at different temperature. Here, 15%, 40%, 60%, 75% of Ethyl Alcohol-water mixture is inserted through the core of Photonic crystal fiber at temperature like 20°C, 25°C and 30°C. COMSOL Multiphysics is used as simulation software and the simulation process is done at wavelength range 600 nm to 1600 nm. From this work, the relative sensitivity is obtained approximately 44, 44.59, 44.85, 45 in percentage at temperature 20°C, 42, 44.2, 44.8, 44.9 in percentage at temperature 25°C, and 42, 43.8, 44.5, 44.85 in percentage at temperature 30°C for 15%, 40%, 60%, 75% of Ethyl Alcohol-water mixture at wavelength 1500 nm respectively. Again, higher sensitivity is achieved when this sensor is operated at lower temperature.
Utilization of Open Source Spatial Data for Landslide Susceptibility Mapping at Chittagong District of Bangladesh—An Appraisal for Disaster Risk Reduction and Mitigation Approach  [PDF]
Md. Ashraful Islam, Sanzida Murshed, S. M. Mainul Kabir, Atikul Haque Farazi, Md. Yousuf Gazi, Israt Jahan, Syed Humayun Akhter
International Journal of Geosciences (IJG) , 2017, DOI: 10.4236/ijg.2017.84031
Abstract: Since creation of spatial data is a costly and time consuming process, researchers, in this domain, in most of the cases rely on open source spatial attributes for their specific purpose. Likewise, the present research aims at mapping landslide susceptibility at the metropolitan area of Chittagong district of Bangladesh utilizing obtainable open source spatial data from various web portals. In this regard, we targeted a study region where rainfall induced landslides reportedly causes causalities as well as property damage each year. In this study, however, we employed multi-criteria evaluation (MCE) technique i.e., heuristic, a knowledge driven approach based on expert opinions from various discipline for landslide susceptibility mapping combining nine causative factors—geomorphology, geology, land use/land cover (LULC), slope, aspect, plan curvature, drainage distance, relative relief and vegetation in geographic information system (GIS) environment. The final susceptibility map was devised into five hazard classes viz., very low, low, moderate, high, and very high, representing 22 km2 (13%), 90 km2 (53%); 24 km2 (15%); 22 km2 (13%) and 10 km2 (6%) areas respectively. This particular study might be beneficial to the local authorities and other stake-holders, concerned in disaster risk reduction and mitigation activities. Moreover this study can also be advantageous for risk sensitive land use planning in the study area.
Antinociceptive and bioactivity of leaves of Murraya paniculata (L.) Jack, Rutaceae
Sharker, Shazid Md.;Shahid, Israt Jahan;Hasanuzzaman, Md.;
Revista Brasileira de Farmacognosia , 2009, DOI: 10.1590/S0102-695X2009000500016
Abstract: the results of antinociceptive and toxicological studies on the ethanol extract of the leaves of murraya paniculata (l.) jack, rutaceae, are reported. the extract (250 and 500 mg/kg dosages) was found to produce a profound antinociceptive activity in a dose dependent manner. the extract showed considerable brine shrimp toxicity (ld50 = 32 μg/ml).
Kinetics of Degradation of Eosin Y by One of the Advanced Oxidation Processes (AOPs)—Fenton’s Process  [PDF]
Ashraf Hossain, A. B. M. Sadique Rayhan, Md. Jahir Raihan, Aklima Nargis, Iqbal M. I. Ismail, Ahsan Habib, Abu Jafar Mahmood
American Journal of Analytical Chemistry (AJAC) , 2016, DOI: 10.4236/ajac.2016.712074
Abstract: Kinetics of homogeneous degradation of Eosin Y (EY), also known as Acid red 87 (CI 45380), are studied, mostly using Fenton’s process, at 30 by monitoring its absorbance at 517 nm (λmax of EY). This process is one of the advanced oxidation processes (AOPs). Mixture of H2O2 and Fe(II) ion in acetate buffer medium (pH 2.74 - 4.56) generates hydroxyl free radicals (?OH) which attack the dye molecules, resulting in degradation of the dye molecules. Results show that the initial rate of EY degradation decreases with the increasing of solution pH because of removal of kinetically important Fe (iron) species through formation of ferric hydroxide. On the other hand, the rate increases with increasing the?concentrations of H2O2, Fe(II) and EY at low solution pH. The initial rate increases with increasing of concentration of H2O2 and, subsequently remains unaffected with further increase of its concentration at a constant Fe(II) concentration because of the enhanced scavenging environment created by H2O2 at its higher concentration. The initial rate also increases with increasing of concentration of Fe(II) at a constant H2O2 concentration and remains unaffected with its further increase. EY concentration also enhances the initial rate at low pH. However, the initial rate is significantly enhanced by UV light. This is because of formation of additional hydroxyl radicals through excitation of the dye molecules by UV light. During the period of experiment, EY in aqueous solution alone hardly suffered any degradation. Degradation mechanism of EY by the Fenton and photo-Fenton’s processes is also discussed. Statistical analysis was used to validate the experimental results. Low values of the standard deviation for both the initial rate and % degradation indicated the consistency of the experimental data.
Effects of Plant Growth Regulators on Callus Proliferation, Plantlet Regeneration and Growth of Plantlets of Doritaenopsis Orchid
Israt Chowdhury,Abu Reza Md. Mahfuzur Rahman,M. Obaidul Islam,S. Matsui
Biotechnology , 2003,
Abstract: Supplement of 2,4-D and BAP into New Phalaenopsis (NP) medium was not effective for the growth of callus in Doritaenopsis orchid. Among the different combinations of BAP and NAA, 5.0 mg l-1 BAP + 0.1 mg l-1 NAA highly enhanced PLB formation from calli. For plantlet initiation from PLBs 0.5 mg l-1 BAP was suitable and higher concentration was inhibitory. Similar effect to that of BAP was found for NAA (0.5 mg l-1) and BAP + NAA (0.5 mg l-1 + 0.5 mg l-1) in plantlet initiation. For in vitro growth of plantlets, 0.5 mg l-1 of BAP was the best for leaf and shoot growth compared to that of for BAP and NAA. However, for root growth of plantlets 1.0 mg l-1 BAP + 1.0 mg l-1 NAA was the most suitable.
Quality Assessment of Surface and Drinking Water of Nakla Paurosova, Sherpur, Bangladesh  [PDF]
Sourav Sarker, Shahin Mahmud, Razia Sultana, Ritu Biswas, Partha Protim Sarkar, Md. Abul Munayem, Nur-E-Alam ?, Md. Rayhan Ali, Muhammad Wasim, Md. Firoz Ali, Md. Omar Faruque, Fatematuz Zuhura Evamoni
Advances in Microbiology (AiM) , 2019, DOI: 10.4236/aim.2019.98043
Abstract: Water is one of the most vital elements of ecosystem and human being, but unfortunately nowadays, the pollution of surface and drinking water is an alarming problem. The present work deals with the assessment of physicochemical and bacteriological profile of several pond, jar and tube-well water samples to ensure its suitability for using and drinking. Total 30 samples were randomly selected and collected from Nakla Paurosova of Sherpur district by following the standard procedure. Bacteriological analysis was carried out by following the standard bacteriological methods. Most of the surface water sampling points were polluted by dumping of waste, cattle wash and were not suitable for drinking or other domestic purposes. Among three heavy metals, only Iron was detected in six tube-well water samples, one was also positive to arsenic, rest of the water bodies were negative to all of these metals. In case of most of the water bodies, different physicochemical properties were below standard limit. In pond water, the Total Viable Count (TVC) ranged from 2.7 × 107 cfu/100ml to 4.4 × 1015 cfu/100ml and Total Coliform Count (TCC) were 3.4 × 105 cfu/100ml to 4.8 × 1013 cfu/100ml, where the mean concentration of Heterotrophic Plate Count (HPC) was 2.4 × 105 cfu/100ml and 1.8 × 105 cfu/100ml in jar and tube-well water respectively. On the other hand, the Total Coliform Count of supply water was 33 cfu/100ml and tube-well water was 14 cfu/100ml. Fecal coliform was detected in all of the pond water samples, four jar and three tube-well water too. E. coli was present in all pond water samples, and also detected in 80% supply and 50% tube-well water also. Shigella spp. was found in two pond water and in one supply water, where tube-well water was free from it. Salmonella spp. was also detected in 30% of pond and 20% of supply water, whereas absent in tube-well water. 50% of pond, 40% of supply and 30% of tube-well water were contaminated with Vibrio spp. The total counts of these pathogenic bacteria exceeded the acceptable limit both surface and drinking water and also showed resistance against a broad range of commercially available antibiotics. Survey-based result revealed that, peoples of the study area who were using or drinking these water, were suffering from various water borne diseases. These kinds of water sources pose a major threat to public health. So, public awareness, proper treatment and precise management are needed prior to use and drink of these water.
Migraine in gulf war illness and chronic fatigue syndrome: prevalence, potential mechanisms, and evaluation
Rakib U. Rayhan
Frontiers in Physiology , 2013, DOI: 10.3389/fphys.2013.00181
Abstract: Objective: To assess the prevalence of headache subtypes in Gulf War Illness (GWI) and Chronic Fatigue Syndrome (CFS) compared to controls.
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