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Articles by M. A. Awal
Total Records ( 2 ) for M. A. Awal
  M. A. Awal , M. N. H. Siddiqi , M. Kurohmaru , B. B. Andriana , T. Mizukami , Y. Kanai and Y. Hayashi
  Biochemical effects of 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin (TCDD) on the sertoli cell culture from prepubertal male Wistar rats were examined by light and transmission electron microscopy. Sertoli cell culture was obtained by sequential collagenase and trypsin-EDTA treatment. TCDD was added to the cell culture at the concentration of 10, 100, 500, and 1000pg ml-1, respectively and control group was treated with saline. Distinct histopathological changes in the sertoli cell culture were noted after exposure to TCDD. At 2 days after treatment, the increase of degenerated sertoli cells were 11.8, 18.7, 28.4, and 30.8% at the concentration of 10, 100, 500, and 1000pg ml-1, respectively. Similarly, at 4 days, those increased as 16.5, 28.9, 35.7 and 48.9%, and at 6 days as 25.7, 38.4, 43.7, and 69.9%, respectively. They were significantly different from those in the control group (p<0.05). The maximum degenerative change of Sertoli cells was observed at the concentration of 1000pg ml-1 and at 6 days after treatment. The research finding suggested that TCDD showed a direct effect on sertoli cells in culture. A further study is needed to elucidate the mechanism of the action of TCDD on sertoli cells.
  M. A. Awal and M.A.H. Khan
  Mulching effects of sawdust, ash, rice straw and water hyacinth on growth, dry matter partitioning, earliness, yield attributes and yield of maize were studied. All mulches except sawdust significantly influenced the SLA, CGR, NAR and DM partitioning, but with no apparent effect on RGR. Water hyacinth and rice straw mulches hastened the tasseling, silking and maturity time by 6, 8 and 8 days respectively and produced double the amount of biological and economic yield as compared to the control and sawdust, the ash mulch behaved intermediately. Significantly higher harvest index was also observed under water hyacinth and rice straw mulches.
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