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Articles by M. Motiur Rahman
Total Records ( 6 ) for M. Motiur Rahman
  Zakaria Ahmed , Hasina Banu , M. Motiur Rahman , Firaza Akhter and M. Shamsul Haque
  In present world there is an increase in demand for organic waste disposal to minimize pollution and maximize resource recovery. Several workers from various parts of the world have reported successful conversion of waste materials to useful compost. Lignocellulose comprises three different polymer types: lignin, hemicellulose and cellulose. Bioconversion of lignocellulosic material through microbial enzyme to produce fermentable sugars has been given serious consideration and continuous research and development activities has been carried out in laboratories around the world. This article highlights the significant research findings and reviews the state of the art in this very important area of biotechnology.
  M. Shamsul Haque , Zakaria Ahmed , Firoza Akhter , M. Asaduzzaman , M. Motiur Rahman and M. A. Hannan
  Recently six varieties of jute were released from Bangladesh Jute Research Institute where two were from C. olitorius (OM-1 and OF-390) and four from C. capsularis (C-718, C-2035, C-2005 & C-2143). These varieties were compared for their retting properties, morphological differences as well as their physical properties of the fibre extracted from them. Among them, white fibre with fewer cuttings and “A” and “B” grade fibers were obtained by retting from C-718 and OF-390 varieties, respectively yielding higher quantity of fibers. Other varieties found inferior in quality in all aspects.
  Zakaria Ahmed , Firoza Akhter , M. Shamsul Haque , Hasina Banu , M. Motiur Rahman and A. K. M. Faruquzzaman
  Micropropagation consists of three types of vegetative propagation. It remains a popular research subject and thus continued research is definitely needed to increase the speed with which some plants can be produced giving a superior quality product.
  Md. Golam Sadik , M. A. Gafur , M. Shah Alam Bhuiyan , M. Motiur Rahman and Helal U. Biswas
  The ethanol extract of Pergularia daemia and its steroidal fraction are reported to have antifertility activity. In this work we studied the alkaloidal fraction of the ethanol extract to observe its antifertility activity. Oral administration of the alkaloidal fraction at a dose of 200mg kg‾1 body weight showed a significant activity in preimplantation stage of female mice. The activity of the alkaloidal fraction, when compared with the steroidal fraction, was found to be more pronounced since the former inhibited not only the fertility of the female mice but also took short period to return the oestrous cycle to normal, with in 4 to 6 days of drug treatment while steroidal fraction treated mice returned to normal within 6 to 8 days.
  Anwarul Islam , Abu Sayeed , Golam Sadik , M. Motiur Rahman and G. R. M. Astaq Mohal Khan
  Two clerodane diterpines viz., Kolavenic acid (1) and 16-oxo-cleroda-3, 13(14) E-diene-15-oic acid (2) were isolated from the petroleum ether (C2H5-O-C2H5) extract of the seed of Polyalthia longifolia and were screened against fourteen pathogenic bacteria for their antibacterial activities. The test materials exhibited strong activities against most of the test bacteria. The minimum inhibitory concentration (MIC) of the compound (1) and (2) was determined against Bacillus cereus, Bacillus subtilis, Escherichia coli, Shigella flexneriae and Shigella boydii which were 64, 64, 32, 16 and 32μg ml-1 for compound (1) and 16, 32, 8, 4 and 16 μg ml-1 for compound (2), respectively. The cytotoxic activity of the compound (1) and (2) was determined by brine shrimp lethality bioassay. Both the compounds showed significant cytotoxic activities and LC50 values of Kolavenic acid (1) and 16-oxo-cleroda-3, 13(14)E-diene-15-oic acid (2) were 3.16 and 2.52μg ml-1, respectively.
  Awal M.A , M. Shamim Hossain , M. Motiur Rahman and Mst. Shahnaj Parvin
  The root of Cassia tora exhibited substantial antishigellosis activity. The ethylacetate fraction of the crude extract showed maximum activity with the zone of inhibition ranging between 23-25 mm at the concentration of 200 μg disc-1. The minimum inhibitory concentration (MIC) of ethylacetate, chloroform and ethanol extracts was found between 32-64 μg ml-1 whereas the methanol and petroleum fractions showed MIC values between 128-512 μg ml-1. Thus the results suggest that the ethylacetate fraction may have some chemical constituents which could be useful as antishigellosis agents in modern clinical practice. Our effort is going on to isolate the potent antishigellosis constituents from the root extracts of Cassia tora with the aim of adding new therapeutic agents to fight against shigellosis problem in Bangladesh
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