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Mymensingh, Bangladesh

Bangladesh Agricultural University or BAU was established as the only university of its kind in Bangladesh in 1961. The scheme for the establishment of BAU was finalized on 8 June 1961 and its ordinance was promulgated on 18 August 1961. With the appointment of its first Vice-Chancellor, the university formally came into existence on 2 September 1961 and started functioning with the College of Animal Husbandry and Veterinary Science at Mymensingh as its nucleus. The university has six faculties and 43 departments covering all aspects of agricultural education and research.BAU is the second highest budgeted public university in Bangladesh for the year 2013-2014. BAU's unparalleled research in agriculture has made it very recognized university in whole ASIA continent. Having a very low ratio of teacher-student, quality of education in BAU is brilliant and remarkable. Wikipedia.

Ahmed N.,Charles Darwin University | Garnett S.T.,Bangladesh Agricultural University
Food Security

In order to meet the soaring demand for food, there is a need to increase rice and fish production in Bangladesh. In spite of the potential for rice-fish farming, rice monoculture remains the main farming system in Bangladesh. However, rice monoculture cannot provide a sustainable food supply without a cost to long-term environmental sustainability. We provide evidence that integrated rice-fish farming can play an important role in increasing food production as the integrated farming system is better than rice monoculture in terms of resource utilization, diversity, productivity, and both the quality and quantity of the food produced. The Cobb-Douglas production function model also suggests that higher yields can be achieved by increasing inputs in the integrated farming system. Integrated rice-fish farming also provides various socioeconomic and environmental benefits. Nevertheless, only a small number of farmers are involved in integrated rice-fish farming due to a lack of technical knowledge, and an aversion to the risks associated with flood and drought. We conclude that integrated rice-fish farming can help Bangladesh keep pace with the current demand for food through rice and fish production but requires greater encouragement if it is to realize its full potential. © 2011 Springer Science+Business Media B.V. & International Society for Plant Pathology. Source

Asaeda T.,Saitama University | Rashid M.H.,Saitama University | Rashid M.H.,Bangladesh Agricultural University
Journal of Hydrology

Sediment has been released from the dams of many rivers throughout the world to keep reservoirs operational. This huge flux of sediment resulted in deposition in downstream channels and bars and was followed by an intensive colonization of plants. An investigation was carried out to clarify the relationship between the colonization of herbaceous vegetation and a set of edaphic factors observed in downstream active river channel areas of the Kurobe River in Japan that were subject to different rates of deposition. Herbaceous plant biomass was strongly correlated (p< 0.01) with surface sandy layer thickness. It had also a high correlation with a fraction of fine sediments (p< 0.01). However, higher plant biomass due to fine sediment was associated with its total nitrogen (TN) concentration rather than total phosphorus (TP) or moisture content levels. The TN:TP ratio of substrate was smaller than that of the plants and suggests that the lack of nitrogen (N) was the primary factor for limiting plant growth. Following sediment release, N was no longer a limiting factor and as a result, vegetation growth was promoted. The increased depth of fine sediment in these areas also favored vegetative encroachment. Over 90% of TN and TP in the substrate were organic and originated from the nutrients that were in the sediment accumulated in the reservoir. The accumulation of sediment also changed the inundation pattern of the river channels and frequently submerged transects that were more fertile and productive for herbaceous plants as opposed to less inundated, higher spots, which represent the original unaffected portion of the river. After initial colonization, the encroachment of vegetation was accelerated by the intensified accumulation of fine sediment during inundation and added nutrients through litter mineralization. The history of sediment release in the Kurobe River and the rate of encroachment of channel vegetation follow a similar trend. The results of this study support the hypothesis that the downstream river channel morphology and ecosystem shift considerably due to multiple dam releases and create a substantial amount of sediment deposition that favorably change the nutrient stoichiometry and allow for vegetative encroachment. Therefore, any nutrient release program should consider the measurable costs and benefits when it comes to these releases and the amount of vegetative growth in these channels that result. © 2012 Elsevier B.V. Source

Iqbal Z.,Bangladesh Agricultural University | Lai E.P.C.,Carleton University | Avis T.J.,Carleton University
Journal of Materials Chemistry

Discovery of new antimicrobials is highly desired due to the emergence of microorganisms that have multi-drug resistant capability. The purpose of this study was to investigate the antimicrobial effect of dopamine (DA) on Escherichia coli. DA's inhibitory activity was tested at different initial E. coli cell concentrations. Significant 3.5 and 4.2 log inhibitions were observed for 1 × 10 8 and 1 × 10 7 cells per mL, when compared to controls, corresponding to 99.97 and 99.99% inhibitions. Microscopic techniques (optical, fluorescence, and scanning electron) and Fourier transform infrared spectroscopy confirmed a polydopamine coating on the bacterial cells. Capillary electrophoresis with ultra-violet detection indicated a significant change in the cell structure caused by a low dose (100 mg L -1) of DA within 200 min of incubation. © 2012 The Royal Society of Chemistry. Source

Janjai S.,Silpakorn University | Bala B.K.,Bangladesh Agricultural University
Food Engineering Reviews

Drying is the oldest preservation technique of agricultural products, and sun drying is still widely used for preservation of agricultural products in the tropics and subtropics. Previous efforts on solar drying of cereal grains, fruits, vegetables, spices, medicinal plants, and fish are critically examined. Recent developments of solar dryers such as solar tunnel dryer, improved version of solar tunnel dryer, roof-integrated solar dryer, and greenhouse-type solar dryer for drying of fruits, vegetables, spices, medicinal plants, and fish are also critically examined in terms of drying performance and product quality, and economics in the rural areas of the tropics and subtropics. Experimental performances of different types of solar dryers, which have demonstrated their potentialities for drying of fruits, vegetables, spices, medicinal plants, and fish in the tropics and subtropics, are addressed, and also the simulated performances of the different types of solar dryers are discussed. The agreement between the simulated and experimental results was very good, and it is within the acceptable limit (10%). The simulation models developed can be used to provide design data and also for optimal design of the dryer components. A multilayer neural network approach was used to predict the performance of the solar tunnel dryer. Using solar drying data of jackfruit and jackfruit leather, the model was trained using back propagation algorithm. The prediction of the performance of the dryer was found to be excellent after it was adequately trained and can be used to predict the potential of the dryer for different locations and can also be used in a predictive optimal control algorithm. Finally, prospects of solar dryers for drying of fruits, vegetables, spices, medicinal plants, and fish in the tropics and subtropics are discussed. © 2011 Springer Science + Business Media, LLC. Source

Mostofa M.G.,Kagawa University | Mostofa M.G.,Bangladesh Agricultural University | Fujita M.,Kagawa University

The present study investigated the effect of salicylic acid (SA) on toxic symptoms, lipid peroxidation, reactive oxygen species generation and responses of antioxidative and glyoxalase systems in rice seedlings grown hydroponically under copper (Cu) stress for 48 h. Exposures of 75 and 150 μM Cu2+ caused toxicity symptoms (chlorosis, necrosis and rolling in leaves), sharp increases in malondialdehyde (MDA), hydrogen peroxide (H2O 2) contents and lipoxygenase (LOX) activity with concomitant reductions of chlorophyll (Chl) and relative water content (RWC). Both levels of Cu decreased ascorbic acid (AsA), glutathione (GSH), non-protein thiol (NPT) and proline contents in roots but rather increased in leaves except that AsA decreased in leaves too. These results together with overaccumulation of superoxide (O 2 •-) and H2O2 in leaves revealed that Cu exposures induced oxidative stress. Contrary, SA-pretreatment (100 μM for 24 h) reduced toxicity symptoms and diminished Cu-induced increases in LOX activity, H2O2, MDA and proline contents while the levels of RWC, Chl, AsA and redox ratios were elevated. Higher levels of GSH and NPT were also observed in roots of SA-pretreated Cu-exposed seedlings. SA-pretreatment also exerted its beneficial role by inhibiting the Cu upward process. Studies on antioxidant enzymes showed that SA further enhanced the activities of superoxide dismutase, ascorbate peroxidase, glutathione reductase and glutathione peroxidase, and also elevated the depressed activities of catalase, dehydroascorbate reductase and glutathione S-transferase particularly at 150 μM Cu2+ stress. In addition, the activity of glyoxalase system (glyoxalase I and II) was further elevated by SA pretreatment in the Cu-exposed seedlings. These results concluded that SA-mediated retention of Cu in roots and enhanced capacity of both antioxidative and glyoxalase systems might be associated with the alleviation of Cu-toxicity in rice seedlings. © 2013 Springer Science+Business Media New York. Source

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