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Articles by A.A. Hassan
Total Records ( 6 ) for A.A. Hassan
  A. M. Abd El Tawab , M. S.A. Khattab , H. M. El-Zaiat , O. H. Matloup , A.A. Hassan , M. M. Abdou , M. S. Khalel and M. H. Yacout
  Objective: This study was carried out to investigate the effect of supplementing diets containing date palm fronds with cellulase and tannase enzymes. Materials and Methods: Fifteen lactating buffaloes were randomly assigned into three groups (five animals each) using complete random design and the experimental diets were T1 group fed 50% (CFM), 30% Egyptian clover and 20% rice straw, T2 group fed 50% (CFM), 20% clover, 15% rice straw and 15% date palm fronts and T3 group fed T2 diet plus 4 g kg–1 DM of enzymes. Results: The results showed that DMI decreased in T2 compared with T1 and T3. However, enzymes supplementation significantly (p<0.05) increased DM, CP, EE, NFE, NDF, ADF and cellulose digestibility compared with T2. Also, T3 decreased (p<0.05) CP, CF, ADF and cellulose digestibility compared with T1. Blood plasma of animals fed T2 diets recorded the lowest (p<0.05) values for glucose, total protein and globulin compared with other groups. But, T2 group was insignificantly (p>0.05) decreased for albumin and urea compared with T3 group. While, there were no significant (p>0.05) differences for cholesterol, AST and ALT among groups. Milk yield and energy corrected milk were significantly (p<0.05) increased with enzymes supplementation to diet (T3) compared with T2. The increases of milk yield and energy corrected milk were 6.24 and 2.58%, respectively for T3 compared with T1. While, T2 decreased milk yield and energy corrected milk by 12.61 and 20.31% compared with T1. There were no differences (p>0.05) between experimental treatments in total solids. While, there were significant (p<0.05) decrease in fat and protein between T2 and other groups. Solids not fat and ash were significant (p<0.05) increase with T2 and other groups. Conclusion: It could be concluded that cellulase and tannase enzymes supplementation to diet could enhance the performance of lactating buffaloes.
  Salma H. Abu Hafsa , M.M. Basyony and A.A. Hassan
  A study was conducted to investigate the effects of Guar Korma Meal (GKM) as a partial replacement for soybean meal (SBM) in broilers diets on growth performance, carcass traits, blood metabolites and economic efficiency. Three hundred; one-day-old Cobb-400 broilers, each with five replicates (n = 15 chicks per replicate), were submitted to one of the four diets contain 0, 25, 50, 75% SBM were replaced with GKM in starter and grower diets, respectively for 42 days in a completely randomized design. Body Weight (BW), Body Weight Gain (BWG) and Feed Intake (FI) were lower (p<0.05) in broilers fed (GKM-50) and (GKM-75) than those fed (GKM-25) and (GKM0), whereas Feed Conversion Ratio (FCR) was better (p<0.05) when broilers fed on (GKM-25). Performance Index (PI) and Performance Index Score (PIS) were superior in the (GKM-25) followed by SBM fed groups when compared to the other groups. Digestibility coefficients of OM, CP, CF and NFE were higher (p<0.05) for broilers fed on (GKM-25) than those fed other diets, however, EE was highest for broilers fed on (GKM-50) and (GKM-75). Carcass traits, cut up parts and yields significantly increased (p<0.05) for chicks fed (GKM0) and (GKM-25), while group fed on (GKM0) recorded the lowest abdominal fat (%) followed by (GKM-25) group. Ascending levels of GKM treatments influenced the carcass meat, which was observed as decrease in CP contents (p<0.05) but increase in moisture, EE and ash contents (p<0.05) in breast and thigh meat compared to (GKM0) group. Broilers fed on (GKM-75) had the highest urea, triglycerides, cholesterol, HDL, LDL and vLDL concentrations than the other treatments. The best value of Economic Efficiency (EE) was recorded by group fed on (GKM-25). High levels of GKM in broilers diets deleteriously affect growth performance, FI, FCR and blood lipids. It was concluded that optimal level of GKM is low level 25% without adverse effects on growth performance, carcass traits, blood lipids or economic efficiency of broilers.
  S.M. Soliman , A.A. Hassan , Neamat I. Bassuony and A.M. El-Morsy
  Background and Objective: Recently use of extracts plants in animal nutrition as feed additives and natural alternatives for antibiotic, for improve feed efficiency and enhancing livestock productivity has increased. The current study was designed to determine the effect of oral administration of fruit and vegetable juice (FVJ) as natural additives on the productivity of dairy cows. Materials and Methods: In this study eighteen lactating crossbred Holstein Friesian cows were used in three similar groups (6 cows/group): 100 mL water/cow (control group). Group 2 and 3 were supplemented with 50 mL FVJ/cow (50 FVJ) (Group 2) and 100 mL FVJ/cow (100 FVJ) (Group 3) for 70 days. During experiment period parameters of milk, digestibility, fermentation, gas production, methane production and blood was evaluated. Results: The study revealed increased in digestibility coefficients, milk yield, 4% FCM and milk composition in Group 2 and 3. Concurrently ruminal fluid fermentation of total VFAs, acetic acid and ammonia-N concentrations had decreased. Also, cow’s supplementation with FVJ had a favorable effect to reduce cumulative gas production and methane compared to the control group. Moreover, the treatment with (100 FVJ) showed the lowest (p<0.05) in vitro dry matter disappearance (IVDMD) and total gas production compared with treated (50 FVJ) or control group. The treatments (50 FVJ) and (100 FVJ) had enhanced the hematological parameters (RBC, Hb, WBCs and PCV) in comparison to the control group. Simultaneously, cows supplemented with FVJ reduced liver enzymes compared with those in control group. The evaluation of (ALT and AST) showed a significant decrease for cow treatments by FVJ compared to the control. Conclusion: It concluded that supplementation of FVJ (50 or 100 mL/cow/day) to dairy cow improved the feed digestibility, rumen fermentation and productive performance.
  A.A. Hassan and Ahmed M. Kassem
  This study presents an adaptive control for interfacing Wind Energy Conversion System (WECS) to utility grid based on Model Predictive Control (MPC). The proposed system mainly consists of a wind turbine which drives an induction generator. The generator is connected to the utility grid through DC-Link. The main control objective aims to regulate the DC link voltage and to track and extract maximum available wind power. This is accomplished via controlling the firing angles of the rectifier and the inverter. The MPC controller is based on the minimization of a cost function of voltage and power errors while respecting the given constraints. The performance of the wind generation system with the proposed MPC controller has been tested through a step change in reference input power. Simulation results confirm that good dynamic performance of the proposed wind energy scheme has been achieved.
  A.A. Hassan , N.N. Karim , M.A. Hamid and M.A. Salam
  Experiment was conducted to increase cropping intensity through soil water management and conservation practices. Transplanted rainfed aman rice is grown in Cropping patterns studied during 2000-01 were rice-legume-legume and rice-fallow-fallow, using early maturing drought tolerant crop varieties and local rice. Tillage treatments were imposed during land preparation. Mulch treatments were also imposed in legume rotations. Newly introduced varieties, BRRIdhan 33 and BINAdhan 4, were earlier by 25 and 15 days, respectively, compared with the local rice Sarna. The early harvest of rice varieties left enough residual moisture due to tillage amendments and mulch applications. The available profile soil moisture left was able to meet up about two-third of the water requirement of chickpea (cv. BINAsola2 and Hyprosola). Pre-sowing irrigation, tillage, mulch practices and little rain contributed to successful production of mungbean cv. BINAmoog 2 after chickpea. A reasonable yield of all the crops was obtained compared with the national average yield. The introduction of chickpea and mungbean in the cropping pattern resulted the cropping intensity from 100 to 300%. The altered cropping pattern (rice-legume-legume) evaluated with the existing one (rice-fallow-fallow) resulted the net return of t 37144.00 to t 55406.00 with BCR value of 1.94-2.40. The achievement of a new cropping pattern was only possible due to introduction of early drought tolerant crop varieties, soil water management and conservation practices.
  B. Akinsanya , A.A. Hassan and O.A. Otubanjo
  A comparative study of the gut helminthes of Gymnarchus niloticus and Heterotis niloticus were undertaken. A total of 38 fishes comprising of 20 Gymnarchus niloticus and 18 Heterotis niloticus were examined for helminth parasites. The overall prevalence of gastrointestinal helminth infections was 34.2%, which implied that 13 of the specimens examined were infected with parasites. A total of 18 parasites were recovered from the fish specimens. The male specimens of Heterotis niloticus had 38.9% prevalence of infections while the male specimens of Gymnarchus niloticus had 0% prevalence of infections. The female specimens of the two fishes had 50% prevalence of infections. Gymnarchus niloticus harboured two nematodes; Raphidascaroides species in the stomach and the Philometrids, Nilonema gymnarchi, in the intestine. Heterotis niloticus were infected with a trematode Brevimulticaecum heterotis in the liver and Tenuisentis niloticus and Sandonella sandoni in the intestine. The worm burden and intensity were low and independent of sex and age of fish with no seasonal variation in parasite intensity observed. The low prevalence of infection is possibly due to the randomness of specimens` selection.
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