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Dhaka, Bangladesh

Bangladesh Atomic Energy Commission is a scientific research organization and regulatory body of Bangladesh. Its main objective is to promote use of atomic energy for peaceful purposes It was established on 27 February 1973., after the liberation of Bangladesh. Wikipedia.

Rahman M.M.,Dhaka University of Engineering and Technology | Pervez S.,Dhaka University of Engineering and Technology | Nesa B.,Dhaka University of Engineering and Technology | Khan M.A.,Bangladesh Atomic Energy Commission
Polymer International | Year: 2013

Biodegradable polymers have significant potential in biotechnology and bioengineering. However, for some applications, they are limited by their inferior mechanical properties and unsatisfactory compatibility with cells and tissues. In the present investigation blends of chitosan and gelatin with various compositions were produced as candidate materials for biomedical applications. Fourier transform infrared spectral analysis showed good compatibility between these two biodegradable polymers. The composite films showed improved tensile properties, highly porous structure, antimicrobial activities, low water dissolution, low water uptake and high buffer uptake compared to pure chitosan or gelatin films. These enhanced properties could be explained by the introduction of free -OH, -NH2 and -NHOCOCH3 groups of the amorphous chitosan in the blends and a network structure through electrostatic interactions between the ammonium ions (-NH3+) of the chitosan and the carboxylate ions (-COO-) of the gelatin. Scanning electron microscopy images of the blend composite films showed homogeneous and smooth surfaces which indicate good miscibility between gelatin and chitosan. The leafy morphologies of the scaffolds indicate a large and homogeneous porous structure, which would cause increased ion diffusion into the gel that could lead to an increase in stability in aqueous solution, buffer and temperature compared to the gelatin/chitosan system. In vivo testing was done in a Wistar rat (Rattus norvegicus) model and the healing efficiencies of the scaffolds containing various compositions of chitosan were measured. The healing efficiencies in Wistar rat of composites with gelatin to chitosan ratios of 10:3 and 10:4 were compared with that of a commercially available scaffold (Eco-plast). It was observed that, after 5 days of application, the scaffold with a gelatin to chitosan ratio of 10:3 showed 100% healing in the Wistar rat; however, the commercial Eco-plast showed only a little above 40% healing of the dissected rat wound. © 2012 Society of Chemical Industry. Source

Ali M.P.,Bangladesh Rice Research Institute | Chowdhury T.R.,Bangladesh Atomic Energy Commission
Euphytica | Year: 2014

The brown plant hopper, Nilaparvata lugens Stål (Hemiptera: Delphacidae) is an important pest of rice, Oryza sativa L. (Poales: Poaceae). The need for N. lugens-resistant rice varieties able to cope with stressful conditions obviously requires that breeders better comprehend the physiology and genetic control of N. lugens resistance. In spite of several good reviews recently published, an integrated vision of current information on rice resistance to N. lugens stress has been lacking. Here the most recent data on the N. lugens resistance rice varieties is presented. An inventory is included of N. lugens resistance donors available for breeding programs and a comprehensive survey of current work on gene maps, chromosomal locations, quantitative trait locus (QTL) detection and cloning as well as marker-assisted selection to introgress favorable alleles into chosen rice lines. A schematic view of the rice chromosomes on which N. lugens resistance QTLs and genes are positioned is included. The graphical gene locus of major resistance genes and QTL positions that have been detected on different chromosomes involved in N. lugens response is also presented. We highlight missing information that could help to design better N. lugens resistant varieties, and evaluate the significance of the data presented for the future of rice breeding. © 2013 Springer Science+Business Media Dordrecht. Source

Hawila D.,Masdar Institute of Science and Technology | Mondal M.A.H.,Masdar Institute of Science and Technology | Mondal M.A.H.,Bangladesh Atomic Energy Commission | Kennedy S.,Masdar Institute of Science and Technology | Mezher T.,Masdar Institute of Science and Technology
Renewable and Sustainable Energy Reviews | Year: 2014

Energy is an important input for national socio-economic development. The current trends of energy supply and demand are not sustainable because of the expected huge gap between demand and supply in the future. The fossil fuels resources are limited and use of these fuels has a negative impact in the environment. Holding energy at a secure level and global climate at a safe level require integration of renewable energy technologies (RETs) in the energy supply-mix. Development of RETs in a country depends on its renewable energy readiness (RE-Readiness) that indicates the gaps and strengths of their development. In light of the various initiatives proposed to turn North Africa into a renewable energy producer and extend its electricity supply to its neighboring European counties, it demands to assess the RE-Readiness. The main object of this paper is to develop and disseminate an assessment framework to find North African countries RE-Readiness for deployment of RETs. This framework is adopted in which the paper applies a consistent methodology across all the North African countries× © 2014 Elsevier Ltd. All rights reserved. Source

Mondal M.A.H.,Masdar Institute of Science and Technology | Mondal M.A.H.,Bangladesh Atomic Energy Commission | Kennedy S.,Masdar Institute of Science and Technology | Mezher T.,Masdar Institute of Science and Technology
Applied Energy | Year: 2014

This paper presents an evaluation of future energy-supply strategies for the United Arab Emirates (UAE) power sector. This paper also identifies the prospects for the further economic development of the country while addressing energy security issues and mitigating environmental impacts. It explores technology choices to meet the future demand in the most cost efficient way based on existing and innovated technologies. The analyses are done for UAE energy system applying MARKAL model. Different policies such as a CO2 emission reduction constraint, renewable energy production targets, and subsidy minimization through international benchmarking for domestic gas prices are applied for this analysis. The results show that the alternative policy scenarios directly allocate clean advanced and renewable technologies to generate electricity. The alternative policy scenarios reduce CO2 emissions in power sector. The simulation results from model show that alternative sustainable energy development policies expected total system cost is not significantly higher. The cumulative system cost increases, relative to the base scenario by 9% and 11% for CO2 emission reduction and renewable target production scenarios, respectively. Use of primary resources to meet the demand is reduced and the supply of primary energy resources is diversified. © 2013 Elsevier Ltd. Source

Jolly Y.N.,Atomic Energy Center | Islam A.,Atomic Energy Center | Akbar S.,Bangladesh Atomic Energy Commission
SpringerPlus | Year: 2013

Metal contamination in agricultural soils is of increasing concern due to food safety issues and potential health risks. Accumulation of Heavy and trace metals in vegetables occur by various sources but soil is considered the major one. Consumption of vegetables containing (heavy/trace) metals is one of the main ways in which these elements enter the human body. Once entered, heavy metals are deposited in bone and fat tissues, overlapping noble minerals and cause an array of diseases. The present study aimed to investigate the concentration of different metals in agricultural soil and vegetables grown on those soils and to evaluate the possible health risks to human body through food chain transfer. Contamination levels in soils and vegetables with metals were measured and transfer factors (TF) from soil to vegetables and its health risk were calculated accordingly. Results showed that concentration of Si, Ba, K, Ca, Mg Fe, Sc, V, Cr, Cu, Zn, As, Mn, Co, Ni, Se, Sr, Mo, and Cd in soil is higher than the World Average value and Al, Ti and Pb is lower than the World Average value whereas concentration of toxic elements like As, Co, Cu, Mn, Pb, Se, Ni, V and Zn in vegetable samples are below the World Average value. The intake of toxic metals (Fe, Cu, Mn, Zn Co, Cr, V, Ni, Pb and Cd) from vegetables is not high and within the permissible limit recommended by WHO, Food & Nutritional Board and US EPA. The Hazard Quotient (HQ) for Fe, Cu, Co, Cr, V, Ni, Pb, Mn, Zn and Cd were calculated which showed a decreasing order of Cd>Mn>Zn>Pb>Cu>Fe>Ni>V=Co>Cr. Highest HQ value found for Cd (2.543) which is above the safe value. © 2013 Jolly et al. Source

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