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Articles by Noha A. Hassaan
Total Records ( 2 ) for Noha A. Hassaan
  H.H. Azzaz , H.A. Murad , Noha A. Hassaan and M. Fahmy
  Background and Objectives: Pectinase as a fibrolytic enzyme is a main tool for effective use of pectin rich agro-residues as alternative feed resources. Production of pectinase by Aspergillus terreus on medium of sugar beet pulp to be used as a feed supplement for dairy animals was the main objective of this study. Materials and Methods: Impact of inoculum size ranged from 1-8% (v/v), incubation period from 1-7 days, initial pH of growth medium in a range between 3 and 8 and different nitrogen source ( ammonium sulphate, ammonium chloride peptone, yeast extract and urea) on pectinase production was studied. Electron microscope was used for investigate impact of the resultant pectinase on orange peel degradation, while batch culture technique was used for investigate impact of different levels of the produced and commercial pectinases on dairy animal’s diets digestibility by rumen microorganisms (in vitro). Results: Pectinase maximum production by Aspergillus terreus was obtained at pH 4 of the growth medium, ammonium sulphate as a sole nitrogen source, 4 days of incubation period and 7% of the inoculum size. All addition levels of the produced pectinases increased dietary dry matter (DM), acid detergent fiber (ADF) and neutral detergent fiber (NDF) degradability, but the maximal level of degradability was obtained by produced pectinase at 600 IU kg1 DM reached 11.44% over the control. Conclusion: Utilization of pectin rich agro-residues with locally produced pectinase in dairy animal feeding, may help in overcome of the feed gap beside the good impact on economy and environment.
  H.H. Azzaz , A.A. Aboamer , Hoda Alzahar , Noha A. Hassaan and H.A. Murad
  Background and Objectives: The search for cheap-safe tools for promoting farm animal productivity is the main concern of the animal nutritionists’ nowadays. The main objective of this study was to evaluate impact of cellulase new formula for promoting performance of lactating Baladi goats. Materials and Methods: Eighteen early lactating Baladi goats were randomly divided into 3 groups; the 1st group was fed control ration (50% concentrate feed mixture (CFM), 25% berseem (clover) hay and 25% wheat straw), the 2nd fed control ration+LAB produced cellulase at 42.16 IU kg1 DM (R1), while the 3rd fed control ration+42.16 IU kg1 DM of Pan-Zyme® (R2). The goats were fed dry matter according to 4% of their body weight for 9 weeks. Results: Goats fed cellulases supplemented rations (R1 and R2) showed higher (p<0.05) nutrients digestibility coefficients, milk yield and milk fat, protein, lactose and total solids yields than those of control. Cellulases supplementation did not cause any change in all of blood parameters (ex; glucose, protein AST, ALT and urea concentrations), milk fatty acids and amino acids profiles. Conclusion: Inclusion of the produced cellulase in lactating goat’s rations improved their ability for feed utilization and milk production with no bad effects on liver and kidney functions, which reflecting the safety and efficacy of the new cellulase product.
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