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Articles by M. J. Alam
Total Records ( 5 ) for M. J. Alam
  M. J. Alam , M. A. R. Howlider , M. A. H. Pramanik and M. A. Haque
  A total of 144 day-old straight run Arbor Acres broiler chicks were fed on 4 iso-nitrogenous and iso-energetic diets; starter control contained 22.1% CP and 2924 Kcal/kg ME and finisher control had 19.25% CP and 3005 Kcal/kg ME. In three test diets exogenous Alquerzim (1g/kg), Roxazyme-G (0.01g/kg) and Feedzyme (0.05g/kg) were supplemented to control diet to observe whether addition exogenous enzyme improves efficiency of broiler production. The growth rate, feed intake, feed conversion, dressing yield and profitability were increased by addition of exogenous enzymes. The addition of enzyme is effective to overcome antinutritive effect of NSP on broiler performances. Enzyme had no effect on survivability. Roxazyme-G and Feedzyme are more profitable than Alquerzim. Therefore, it may be concluded that exogenous enzyme may be used in broiler diet by proper selection of enzyme to get best result.
  Bhupesh C. Roy , M. J. Alam and M. Goto
  Liquid-liquid extraction based on reversible chemical complexation is an efficient separation technique that is highly effective and selective for separating polar organic acids (monocarboxylic acids) from their aqueous medium. Extraction equilibria of aqueous solutions of monocarboxylic acids such as acetic acid, propionic acid and butyric acid with Tri-n-butyl phosphate (TBP) in dodecane were measured at the temperature (20±1)°C under various concentrations of acids, extractant (TBP) and also with the variation of organic/aqueous phase ratio. An expression for the extraction equilibrium was derived by which the extraction equilibrium constant (Kc) as well as the number of apparent reacting molecules of extractant (n) were evaluated. From the experimental data it was observed that the estimated values of extraction equilibrium constant (Kc) and the apparent number of extractant molecules reacting with one molecule of each acid dependent on the organic phase composition as well as on the concentration of aqueous phase, due to which each acid gave different extraction isotherms.
  M. S. A. Khan , M. J. Alam , S. Rheman , S. Mondal and M. M. Rahman
  The fecundity and gonado somatic index (GSI) of Plotosus canius during its peak breeding seasons were studied. Fecundity of P. canius during its peak breeding season April to August of size range 36.5 to 69.2 cm varied from minimum 1180 in April and maximum 2250 in July. Fecundity showed a linear relationship to total length, body weight and ovary weight. The linear relationship between weight and fecundity was more valid than that of length and fecundity. The results of correlation regression equation of total length-fecundity, body weight-fecundity and gonad weight-fecundity were (r=0.832619), (r=0.933599) and (r=0.96118). On average 2.3718 ova are produced in pre gram-weight of body. Study on gonado somatic index indicated that mature fish become available from April to August, the peak being July.
  Sarder Nasir Uddin , A.M. Hasan , M.R. Anower , M.A. Salam , M. J. Alam and S. Islam
  Until the advent of genetic engineering, enzyme producers were limited in their ability to produce innovative products for the marketplace. They were constrained to isolate enzymes from organisms approved for the industrial use. The desired characteristics could be enhanced only using classical in lit agenesis techniques. When these methods failed, no alternatives were available. Commercialization depended on incremental yield improvements gained by continuous programs of strain development. The ability to use recombinant DNA (rDNA) techniques has removed many of these barriers. Enzyme producers recognized early the potential for commercialization new products using genetic manipulation. They worked with a wide variety of single-celled organisms that were simpler and thus, easier to understand then the higher orders of plants and animals. The organisms already were well characterized for growth and expression rates. Short life cycles allowed rapid testing. These systems were ideal for genetic manipulation using rDNA techniques. Genetic engineering, combined with an understanding of biocatalysts to predict alterations for enzyme improvements, is revolutionizing the production and use of enzymes in the marketplace. Offering a recombinant produced product represents the culmination of a long and complex effort on the part of a multitude of disciplines: molecular and microbiology, X-ray crystallography, enzymology, protein and organic chemistry, biochemistry, fermentation and formulation engineering, assay chemistry and technical service/applications, marketing, sales. Because of the variety of disciplines required, a critical mass is needed to innovate products successfully and them to market. The continued proliferation of novel enzyme products requires development of core technologies so complex and expensive that they can be justified only rDNA technology must consider regulatory issues, ownership protection and consumer acceptance.
  M. Y. Ali , M. A. Islam , M. J. Alam and M. N. Islam
  Yogurt samples from ten different shops of Mymensingh Town and Laboratory made in 3 batches were analyzed in the Dairy Technology Laboratory, Department of Dairy Science, Bangladesh Agricultural University to monitor the quality. Significant difference in overall score of physical test (smell and taste, body and consistency, colour and texture), chemical (protein, fat, total solids, ash, acidity and PH) and microbiological status was found among different yogurt samples. Laboratory made yogurt was the best in quality. Dayamoy and Anil Gosh were in 2nd and 3rd position in quality of yogurt. This investigation suggested that adulterated milk must be avoided in yogurt preparation and also to follow strict hygienic condition in order to have
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