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Articles by M.D. Hossain
Total Records ( 4 ) for M.D. Hossain
  M.D. Hossain , Toshisada Suzuki and Masayuki Fujita
  Endogenous substrates and physiological ligands of Glutathione s-transferases (GSTs) have capabilities to reduce the enzyme reactions for xenobiotic substrates. In order to investigate the physiological counterparts to plant GSTs, the inhibitory effect of pumpkin (Cucurbita maxima Duch.) seedling extract on 1-chloro-2,4-dinitrobenzene (CDNB) conjugating activities of pumpkin GSTs was examined. Alcoholic extract of pumpkin seedlings showed different degrees of inhibitory effect for the three GST species namely, CmGSTU1, CmGSTU2 and CmGSTU3. In the assay system, 50% inhibition of CmGSTU1 and CmGSTU3 activities were achieved with the extracts from 178 and 96 mg fresh tissues, respectively. The activity of CmGSTU2 was decreased marginally by the extract and did not reach 50% level. To separate into constituents, the extract was applied to Sep-pac Vac C18 column and eluted with different concentrations of methanol. Inhibitory potencies of Methanol-Eluted Fractions (MEFs) against CmGSTU3 were estimated. Twenty, forty and sixty percent MEFs exhibited higher inhibitions followed by 0% MEF. CmGSTU3 activity was decreased marginally by 100% MEF. MEFs of pumpkin seedlings extract were successively analyzed by HPLC. The analyses indicated that MEFs contain a number of inhibitors with different degrees of hydrophobicity, while 0% MEF also contains hydrophilic inhibitors. The above results suggest that pumpkin seedlings contain various physiological substrates or ligands for pumpkin GSTs.
  Ferdousi Begum , M.A. Kader , M.Y. Sarker , S.M. Raquibullah , M.D. Hossain and Zahid-Al-Rafique
  An experiment was conducted to study the effect of 1000 and 1500 ppm KNap and 2 ppm mixtalol on chlorophyll a, b and carotenoid content of rapeseed leaf. Results showed that chlorophyll a, b and carotenoid content of leaves were positively affected by 1000 ppm KNap and 2 ppm mixtalol but 1500 ppm KNap was failed to show any significant positive effect on chlorophyll content of rapeseed leaf. Two years mean results showed increased chlorophyll a, b and carotenoid content of leaves of rapeseed plant over control following 2 ppm mixtalol and 1000 ppm KNap single and double spray treatments.
  Abdur Razzaq Joadder and M.D. Hossain
  The pattern of food and feeding habit of brakishwater gold spot mullet, Liza parsia (Hamilton) was studied during the period from March 1998 to February 2000. The fish is a herbivorous, feeding mainly on algae (36.55%), higher plant parts (17.19%), protozoans (12.88%), crustaceans (16.46%), debris, sand and mud (12.83%) and unidentified food materials (3.69%) by weight. Electivity analysis showed that the fish avoided zooplankton and strongly selected some genera of phytoplankton (Volvox, Diatoma, Nostoc, Anabina and Ulothrix).
  M. Ahmed , F. Ahmed , M.S.H. Molla , M.D. Hossain and B.M.Z. Rahman
  The experiment was conducted with three nitrogen levels (N1-50 kg N ha –1, N2-75 kg N ha–1, N3-100 kg N ha–1) and four times of leaf cutting (C0-no cutting, C1-cutting at 21 DAT-Day After Transplanting, C2-cutting at 35 DAT and C3-cutting at 49 DAT) to find the possibility of production of rice for green fodder as well as seed. Nitrogen levels exhibited their difference in almost all crop characters. The plant height, number of total tillers hill–1, green forage, forage dry matter, cumulative straw yield, number of productive tillers hill–1, number of non-bearing tillers hill–1, number of total spikelets panicle–1, number of grains panicle–1, number of sterile spikelets panicle–1, grain yield and straw yield were found to be highest with the highest level of nitrogen. Panicle length and 1000-grain weight did not vary with nitrogen levels. The values of these characters were found to be lowest with the lowest level of nitrogen (50 kg N ha–1). Harvest index was the highest at moderate level of nitrogen (75 kg N ha–1). Time of leaf cutting had significant influence on all the parameter studied. Plant height, number of total tillers hill–1, cumulative straw yield, number of productive tillers hill–1, number of non-bearing tillers hill–1, number of total spikelets panicle–1, number of grains panicle–1, number of sterile spikelets panicle 1, 1000-grain weight, grain yield and straw yield were found to be highest for no leaf cutting which was statistically similar to cutting at 21 DAT but 1000-grain weight was also similar to cutting at 35 DAT and lowest for cutting at 49 DAT. Amount of green forage and forage dry matter were highest for cutting at 49 DAT. It may be concluded that there is a tremendous possibility to get green forage and grain or seed from the same rice plant.
 
 
 
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