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Articles by M. A. Qadeer
Total Records ( 3 ) for M. A. Qadeer
  Ikram-ul-Haq , Hamid Mukhtar , Sunila Daudi , Sikander Ali and M. A. Qadeer
  Thirteen mould cultures, capable of producing proteases by solid state fermentation, were isolated from soil. Rhizopus oligosporus IHS13 strain was found to be the best producer of acidic proteases. The agricultural by-products namely sunflower meal, wheat bran, soybean meal, lupin cake and cotton seed meal were evaluated as inducers for the production of enzyme. The enzyme synthesis was maximum when sunflower meal was used as substrate. The production of proteases by Rhizopu s oligosporus HIS13 strain was studied by varying the size of inoculum and type of diluent. The optimum inoculum size and diluent were 10% and distilled water, respectively. The effect of different buffers on the extraction of enzyme was also studied and distilled water was found to be the best extractor. The maximum enzyme production, obtained during the course of study was 4.8 U ml-1.
  Ikram-ul-Haq , Shafia Rani , Hamad Ashraf and M. A. Qadeer
  The present study is concerned with the selection of hyper-producer strain of Bacillus subtilis and optimization of the cultural conditions for the production of alpha amylase in shake flask. The UV irradiated strain of Bacillus subtilis was treated with NTG for different intervals of time (5-60 min). One hundred mutant strains were isolated and tested for the production of alpha amylase and Bacillus subtilis GCBCM-25 gave maximum production of enzyme (2210 U/ml). The optimum conditions for the production of alpha amylase were, NaNO3 as nitrogen source, pH 7.5, phosphate buffer as diluent and 4mM CaCl2. The treatment of NTG for 25 min was found to be suitable for the production of best mutant of Bacillus. The production of alpha amylase was significantly increased with the addition of NaNO3 and 4 mM CaCl2 to the fermentation medium.
  Ikram-ul-Haq , Ayesha Khan , Waseem Ahmad Butt , Sikander Ali and M. A. Qadeer
  The present study is concerned with the effect of carbon and nitrogen sources and their concentrations on the production of xylanase by mutant strain of Aspergillus niger GCBMX-45. High xylanase activities (2350 U/g) were observed when starch (2%) was used as carbon source. (NH4)2SO4 (0.2%) was found to be best nitrogen source for optimum enzyme production i.e., 2480 U/g. The production of enzyme reached maximum, 72 hours after inoculation. All the fermentations were carried out at 30°C at 0.4 cm (10g wheat bran) depth of the basal medium.
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