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Articles by M.Z. Rahman
Total Records ( 4 ) for M.Z. Rahman
  M.Z. Rahman , K.M. Nasiruddin , M.A. Amin and M.N. Islam
  Meristem culture of banana cv. BARI-I was performed for virus eradication and shoot multiplication where different concentrations of BAP (0, 1, 2, 3, 4, 5 and 6 mg L-1) and combinations of different level of BAP (0, 4 and 5 mg L-1) and NAA (0, 0.5, 1.0, 1.5 and 2.0 mg L-1) were used. Among the different levels of BAP, better response was found with 5.0 mg L-1 BAP in respect of survivability (91.67%), single shoot formation rate (62.50%) and formation of hard meristamatic ball like structure (29.17%). Maximum shoot multiplication (4.52/explant) with highest shoot length (3.62 cm) was achieved on MS medium containing 4.0 mg L-1 BAP+1.5 mg L-1 NAA treatment. The clusters of multiple shoots were also rooted on MS medium supplemented with 2.0 mg L-1 NAA.
  M.Z. Rahman , Z.A. Saud , N. Absar , M.R. Karim and F. Hashinaga
  Two different amylase from the flesh of healthy and fruit-rot disease-affected Moringa fruit were purified by successive chromatography of the crude enzyme extract on DEAE-cellulose followed by CM-cellulose and were purified 46- and 50-fold respectively. Both the enzymes appeared to be homogeneous as judged by polyacrylamide gel electrophoresis. Molecular weights of amylases from healthy and diseased Moringa estimated by gel filtration were 59 kDa and 66.5 kDa respectively. The purified enzymes were classified as -amylase and consist of a single polypeptide chain. The amylase from healthy and diseased Moringa flesh showed the following characteristics: pH optima, 6.8 and 6.4; temperature optima, 38 °C and 40 °C; Km value, 0.28 and 0.22% for starch as substrate respectively.
  T.S. Bonny , N. Azmuda , S.I. Khan , N.K. Birkeland and M.Z. Rahman
  This research involved an environmental strain of Stenotrophomonas maltophilia which has been reported to produce serological cross-reactivity with Shigella dysenteriae type 8 specific antisera. Since clinical diagnosis of shigellosis is largely based on culture and serology, the investigation was aimed at in vivo and in vitro virulence comparison between the culturally similar environmental S. maltophilia isolate and the reference S. dysenteriae strains. The findings of this study revealed the absence of virulent genes of Shigella sp. like ipaH, virA and stx1 and characteristic invasive large plasmid in the test isolate. The Western blot analysis revealed that serological cross-reactivity of Stenotrophomonas maltophilia was due to certain protein component(s) in its outer membrane. The isolate was capable of producing extracellular protease, exhibited alpha hemolysis and was negative for hemagglutinating assay. The isolate gave negative reaction with rabbit ileal loop and Sereny tests. The S. maltophilia isolate did not possess any enterotoxic or invasive property as that of virulent S. dysenteriae strains. Further characterizations and adequate genetic manipulations of this environmental isolate may contribute to the development of a potential vaccine candidate for shigellosis.
  M.Z. Rahman , A. Reza , M.S.K. Sarker , F. Kabir and M.R. Islam
  The mean yield of rice, rice straw, rice bran, till oil seed, mango tree and jack fruit tree number and other feeds decreased significantly (p<0.01) after shrimp culture compared with before shrimp culture. The salinity and pH of water under shrimp culture area (saline area) are significantly (p<0.01) higher than that of non-shrimp culture area (non-saline area). In case of soil, the average EC value and pH under shrimp culture area are significantly (p<0.01) higher compared with non-shrimp culture area. The chemical composition of green grass, rice straw and rice bran is similar for both of shrimp culture and non-shrimp culture areas. So the production of livestock feeds have been affected following the shrimp farming practices but it do not affect the feed quality.
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