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Articles by H.M. Ibrahim
Total Records ( 2 ) for H.M. Ibrahim
  H.M. Ibrahim , W.M.W. Yusoff , A.A. Hamid and O. Omar
  The objective of this study was to enhance the production of Cyclodextrin glucanotransferase (CGTase) produced by a local isolate Bacillus G1. CGTase produced in an optimized medium using different fermentation modes was investigated. The performance of batch mode, continuous mode and fed-batch mode was achieved in 5 L-stirred tank fermenter. Maximum CGTase production (77.49 U mL-1) was achieved in fed-batch fermentation with 23.7% improvement compared to batch fermentation (62.63) and 16.6% improvement compared to continuous fermentation (66.47). CGTase productivity in fed-batch fermentation (1.6 U/mL/h) improved by 14.3% compared to that obtained by continuous fermentation (1.4 U/mL/h) and 23.1% improvement compared to batch fermentation (1.3 U/mL/h).
  M.M. Hashim , S.A. El-Safty , K.G. El-Eraqi , H.M.R. El-Sherif , T. Azza , K. Marwa , H.M. Ibrahim and A.Y.M. Abdelhady

Objective: This experiment was conducted to assess the beneficial effect(s) of β-mannanase (Lycell® and Hemicell®) supplementation to low energy diet on productive performance, gross energy digestibility, hematological parameters and carcass traits of broiler chicks. Materials and Methods: A total of 540, day old Ross 308 broiler chicks, obtained from local hatchery with mean body weight of 33±0.05 g, were randomly assigned to three dietary treatments, 180 birds each. The treatments were T1 (low energy diet, 80 kcal kg1, as control), T2 (low energy diet +250 g t1 β-mannanase from Lycell® product) and T3 (low energy diet +300 g t1 β-mannanase from Hemicell® product). The parameters recorded were growth performance, carcass traits, haematological and blood biochemical parameters, dropping and litter microbiology, gut histomorphology and digestibility trial. Results: Results demonstrated that β-mannanase improved growth performance (p<0.05) in terms of body weight, weight gain, feed intake and feed conversion ratio from three to five weeks of age. Carcass traits criteria including dressing weight, dressing percentage, and abdominal fat were significantly (p<0.05) affected by β-mannanase while gizzard, heart and spleen weight were not affected by the dietary treatments. Moreover, the dietary treatments did not affect the dry matter digestibility (DMD) and organic matter digestibility (OMD) of broiler. Conclusion: β-mannanase enzymes, either Lycell® or Hemicell®, supplementation should be considered when low energy diets are formulated in broiler.

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