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Articles by Mohammad Abu Jafor Bapary
Total Records ( 2 ) for Mohammad Abu Jafor Bapary
  Md. Kamal , Md. Moshiur Rahman , Mohammad Abu Jafor Bapary , Lubna Yasmin and Md. Nurullah
  The influence of pH on the changes in myofibrillar remaining ATPase activities of M. rosenbergii and P. monodon was studied after storage at -20°C for 2 days, 0°C for 2 days and 35°C for 30 min. In all the three storage conditions, ATPase activities for both samples were lower in acidic and alkaline pH regions and the activity remains relatively high of 0.403 ° mol Pi/min mg at pH 8.1. The influence of pH on the remaining Mg2+-ATPase activity and Ca-sensitivity of M. rosenbergii and P. monodon were evaluated after storage at 0°C for 2 days and -20°C for 2 days. Mg2+-ATPase activities both in presence and absence of Ca2+ remain high at neutral pH compared to those of acidic and alkaline region. Ca-sensitivity were also very high (about 38 to 50% at pH ranges from 7.4 to 8.3) in neutral pH region where the sensitivity declined sharply both in acidic and alkaline pH region. The influence of pH on the changes in solubility of M. rosenbergii muscle myofibrils during ice and frozen storage was investigated. The highest solubility of 83 to 84% was obtained from myofibrils in the range of pH 7.4 to pH 7.9 after storage for 2 days in ice and -20°C for 2 days in frozen storage. The solubility decreased gradually both in acidic and alkaline pH regions. In the case of P. monodon, the maximum solubility of 84% were obtained at pH 7.9 after 2 days of storage at 0°C. Similarly the maximum solubility of 79% were obtained at same pH of 7.8 in myofibrils after storage at -20°C for 2 days. The solubility of P. monodon myofibrils was quite high in a wide range of pH from 6.8 to 8.3 and the solubility decreased gradually outside of these pH ranges. Comparatively higher solubility of 84% in a wide range of pH in myofibrils stored at 0°C compared to that of frozen storage also indicates the combined effect of pH and frozen storage on the denaturation of muscle myofibrils.
  Lutfun Hussain , Mohammad Ashraful Alam , Md. Shafiqul Islam and Mohammad Abu Jafor Bapary
  Fecundity of 50 specimen of dhela Osteobrama cotio cotio was studied. The number of eggs varied from 512 (total length 2.20 cm and body weight 1.12 g) to 6849 (total length 5.7 cm and body weight 7.1 g). The mean fecundity was 3273+1708 (mean body length 3.880+1.216 cm and mean body weight 3.667+1.82 g and gonad weight 0.605+0.302 g). The fecundity was found to have a linear relation with body length, weight and gonad weight of fish and all these relationships were highly significant. The maximum GSI value (15.31) was found in the month of June, which indicated the period of maximum gonadal growth. A sharp drop in the GSI value (3.79) took place in September indicated the spawning occurred before September. However, the breeding season of dhela started in the monsoon month of early June and extended until September.
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