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Articles by Hoda Alzahar
Total Records ( 4 ) for Hoda Alzahar
  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.
  Hossam H. Azzaz , Hend A. Aziz , Hoda Alzahar and H.A. Murad
  Background and Objective: Olive trees by products (OTB) as agro-waste not efficiently used and left it without treatment may cause serious economical, social and environmental problems. Biological treatments for such wastes can upgrade their nutritive values to be used as alternative feeds for ruminants. Investigate if their synergism between T. viride and S. cerevisiae and impact of each of them or their mixture on OTB digestibility and lactating Barki ewe's productivity are the main objectives of this study. Materials and Methods: Early lactating Barki ewes were randomly assigned into four groups of seven animals each using complete random design. Ewes were fed (4% of their body weight DM), 70% concentrate feed mixture (CFM)+30% untreated OTB (control group), 70% CFM+30% OTB treated with Trichoderma viride (R1), 70% CFM+30% OTB treated with Saccharomyces cerevisiae (R2) and 70% CFM+30% OTB treated with T. viride+S. cerevisiae (R3). Results: No synergism was noted between T. viride and S. cerevisiae on the tested parameters. Ruminal total volatile fatty acids and NH3-N concentrations, microbial protein synthesis and total protozoa count were higher in treated groups than control. Biological treatments increased (p<0.05) all nutrients digestibility, fiber fractions digestibility, milk production and milk components yields. Blood serum globulin, urea, ALT and AST concentrations were not change among all ewes groups, while biologically treated ewes had higher (p<0.05) serum total protein and albumin than those of control. Conclusion: Inclusion of biologically treated olive tree by products (OTB) in lactating ewe’s rations improved their productive performance with no deleterious effects on the treated animal’s health.
  H.H. Azzaz , A.A. Aboamer , Hoda Alzahar , M.M. Abdo and H.A. Murad
  Background and Objectives: Supplementing diets of dairy animals with phytase and xylanase can enhance phosphorus availability and fiber degradation in the rumen and positively affect animal’s health and productivity. In vitro and in vivo trials have been conducted to define the optimal addition level of xylanase and phytase to lactating Baldi goat’s rations and investigate effects of these enzymes on animal’s nutrients digestibility, blood chemistry, milk production and milk composition. Materials and Methods: In vitro batch culture technique was used to evaluate the effect of phytase and xylanase supplementation at different levels (0, 1, 2 and 3 g kg1 DM) on rumen fermentation characteristics. Eighteen early lactating Baldi goats were randomly assigned into three groups and fed 4% dry matter according to their body weight. The first group was fed control ration (35% yellow corn, 20% corn stalks, 20% berseem hay, 12.5% soybean meal and 12.5% wheat bran), the second group fed control ration+Penizyme at 2 g kg1 DM (R1), while the third group fed control ration+Phtase-Plus® at 1 g kg1 DM (R2). Results: Xylanase and phytase supplementation increased the in vitro DM and OM degradability and ruminal NH3-N and total volatile fatty acids (TVFA) concentrations, with no effect on total gas production (TGP) volume. All nutrients digestibility (except CP), blood serum glucose concentration, milk production and milk components yields were increased for enzymes supplemented goats than control. Conclusion: Inclusion of xylanase and phytase in lactating goat’s rations improved their productive performance with no deleterious effects on their health.
  H.H. Azzaz , H.A. Murad , A.A. Aboamer , Hoda Alzahar and M. Fahmy
  Background and Objective: Cellulase as a fibrolytic enzyme is a highly effective tool for agricultural waste treatments. Production of cellulase enzyme on medium of agricultural wastes by Fusarium graminearum to be used in ruminant feeding was the main objective of this study. Materials and Methods: Impact of initial pH of growth medium, different nitrogen sources and variety of agriculture by products as a carbon sources on cellulase production have been studied. Electron microscope was used for investigate the impact of the resultant cellulase on corn stover degradation, while batch culture technique was used for investigate impact of different levels of the produced and commercial cellulases on total mixed ration digestibility by rumen microorganisms (in vitro). Results: Cellulase maximum production by F. graminearum was obtained at 20% corn stover, initial pH of growth medium 5.0 and peptone as a nitrogen source. All addition levels of the produced cellulase increased dry matter (DM), neutral detergent fiber (NDF), acid detergent fiber (ADF), cellulose and hemicellulose degradability of the treated diets, but the maximum produced cellulase efficiency% for dry matter degradability was obtained at 1200 IU kg1 DM reached 23.19% over the control. Conclusion: Utilization of the produced cellulase in enrichment of the feeding value of the agricultural by-products may help in overcome of the feed gap with good impact on environment and public health.
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