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Articles by S. Z. Ali
Total Records ( 2 ) for S. Z. Ali
  V. Singh and S. Z. Ali
  Starches from wheat, maize, finger millet, tapioca, green gram, chick pea, and potato were acid modified using 0.5N HCl, HNO3, H2SO4, and H3PO4 at 50°C for 1.5 h. Alkali Fluidity Number (AFN) for native starches was very low (0.3-2.5) and increased upon modification. HCl and HNO3 produced the highest AFN followed by H2SO4 and H3PO4 . For each acid, cereal and millet starches showed the highest AFN, followed by root, pulse and tuber starches. The extent of hydrolysis was proportional to number average molecular weight (LJFP_A_308543_O_XML_IMAGES\LJFP_A_308543_O_ILM0001.gif), of the native starch in the case of HCl and HNO3 but not in other acids. Intrinsic viscosity [η] of native starches showed positive correlation to their LJFP_A_308543_O_XML_IMAGES\LJFP_A_308543_O_ILM0001.gif,. However, the [η] of the modified starches, particularly those produced by HCl and HNO3 , showed no proportionality with their LJFP_A_308543_O_XML_IMAGES\LJFP_A_308543_O_ILM0001.gif, indicating diverse structural differences in the hydrolsed products. Special behavior of finger millet starch is clear from [η] values of these four acid modified starches. The iodine binding capacity (IBC) of starches, although decreased (2 to 36%) upon modification, did not follow any particular pattern. About 0.01 to 0.94% starch got solubilized during modification—highest being in case of HCl and lowest for H3PO4 . Their LJFP_A_308543_O_XML_IMAGES\LJFP_A_308543_O_ILM0001.gif and IBC were considerably lower in all cases except potato, which showed same IBC for the solubilized, as well as granular modified starch.
  A. K. Das , M. Y. Ali , M. A. Islam , A. K. Hira and S. Z. Ali
  The experiment was carried out at Central Cattle Breeding Station and Dairy farm, Savar, Dhaka, and 3 sub- station and 9 points of Chandpur District in Bangladesh to evaluate the quality and fertilizing capacity of locally produced chilled and imported frozen semen. Motility, sperm concentration and mass activity of semen from different experimental bulls were almost similar. Quality of imported frozen semen was better than that of locally produced chilled semen in respect of motility, motile sperm/ Insemination dose and spermatozoa with normal head. Motility and pH value of semen decreased significantly for transportation and prolongation of preservation duration. Average conception rate of imported frozen semen (57.33) was found to be higher than locally produced chilled semen (45.33). But it was similar between imported frozen (57.33) and average of 1st & 2nd day preserved semen (57%).
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