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Articles by A.S. Abd El-Hakim
Total Records ( 3 ) for A.S. Abd El-Hakim
  K.H. El-Kholy , K.I. Zeedan , El-Neney , A.M. Battaa , Zeedan , I. Omyma and A.S. Abd El-Hakim
  The study aimed to evaluate the effect of latex of Carica papaya as feed additive and enzymes complex on performance growing rabbits. A control diet was formulated with an estimated proportion of 18% crude protein and 14% crude fibre. Another three diets were formulated supplementing control diet with 0.1, 0.5 or 0.7% papaya latex. One hundred weaned New Zealand White (NZW) rabbits aged 35 days with an average initial weight of 570 ± 8.30 g (mean ± std. error) were used in the present work (25/diet). Daily weight gain and daily feed intake were recorded from weaning up to 91 d of age (fattening period). At this time seven rabbits from each group were slaughtered and immediately lymphoid organs were taken and weighted. Also, blood samples were collected of seven rabbits from each group. Besides, at the end of the experimental period cell mediated immunity was recorded. In the whole fattening period, final body weight at 91 d and feed efficiency values of growing NZW increased linearly by 296.3 ± 49.5 g (P = 0.001) and 0.052 ± 0.007 g/g (P = 0.001), respectively per each increment of 1 unit of papaya latex inclusion. Daily weight gain during the whole fattening period from 35-91 d increased linearly and quadratically (P < 0.031) as dietary concentrations of papaya latex increased obtaining the highest values by using up to 0.16 papaya latex. Spleen and thymus indexes increased linearly by 0.023 ± 0.006 (P = 0.002) and 0.161 ± 0.025 (P = 0.001), respectively per each increment of 1 unit of papaya latex inclusion. The values of WBCs; lymphocytes and total protein increased linearly by 0.95 ± 0.324 (P = 0.007); 8.83 ± 2.03 (P = 0.002) and 2.11 ± 0.338 (P = 0.001), respectively per each increment of 1 unit of papaya latex inclusion. Cell mediated immunity increased linearly and quadratically (P < 0.002) as papaya latex inclusion, being optimized for 0.54% papaya latex inclusion. In conclusion, the addition of 0.7% latex of Carica papaya to the growing NZW rabbit diets, improved growth and immunity capabilities during summer heat stress.
  A.S. Abd El-Hakim , G. Cherian and M.N. Ali
  Two experiments were conducted to investigate the growth performance, carcass characteristics, organ weights, plasma proteins and fecal N excretion in broilers fed a 18% crude protein diet supplemented with Thymus vulgaris, Curcuma longa, citric acid, lactic acid or their combinations. In the first experiment, 98 broiler chicks were fed a control diet or a control diet with 0.2% Thyme (TH), 0.2% Curcuma longa (CL), 0.2% Citric acid (CIT), 0.2% TH + 0.2% CL, 0.2% TH + 0.2% CIT, 0.2% CL + 0.2% CIT. In the second experiment, 98 broiler chicks were fed a control diet with 0.2% TH, 0.2% lactic acid (LAC), 0.2% CIT, 0.2% TH + 0.2% LAC, 0.2% TH + 0.2% CIT, 0.1% LAC + 0.1% CIT. Addition of 0.2% TH, or TH + CIT increased weight gain in 21 day-old birds in experiment 1 (p<0.05). Addition of supplements did not produce any significant increase in day 42 body weight. No significant effect of supplements on carcass characteristics, feed conversion, plasma proteins or organ weights were observed except for liver which was higher in birds fed CIT (experiment 1) (p<0.05). No difference was observed in the total protein, albumen or globulin in the plasma. No difference was noticed between dietary treatments on the percentage of fecal Nitrogen (N), AME or Nitrogen retention (NR). Although not significant, the birds fed TH + CL excreted 12.9% less fecal N than Control birds. Similarly, the NR was 13.25% higher in TH + CL when compared with Control birds. Considering the role of low protein diets in reducing feed cost and fecal N excretion, further studies are needed to evaluate the role of plant extracts and organic acids and their optimal levels for broiler birds fed a low protein diet that are raised under suboptimal commercial conditions.
  N.A. Selim , Refaie, Amira M. , Abeer R. Khosht and A.S. Abd El-Hakim
  The aim of this study was to evaluate the interactions between different dietary fatty acids' (FAs) patterns, zinc sources and levels on carcass and meat quality traits of Cobb 500 broiler chicks. Broilers were fed diets contained two different oil sources (soybean oil mainly composed of unsaturated fatty acids, SO; or palm oil mainly composed of saturated fatty acids, PO) and within each studied FAs source, three sources of zinc (zinc sulphate, ZS; zinc methionine, ZM; or nano-zinc oxide, NZO), each at two levels, Recommended (R) equals to 100 mg Zn/kg diet for both ZS and ZM and 40 mg/kg diet for NZO or high (H) equals to 200 mg Zn/kg diet for both ZS and ZM and 80 mg/kg diet for NZO) in a factorial arrangement of 2 x 3 x 2. Results reveal that chicks fed diets contained SO had significantly lower percentage of thigh skin, while, it had higher drip loss and ultimate pH (pHu) of breast and thigh muscles and significantly improved all sensory values of cooked meat compared to those fed diets containing PO. While, those fed dietary PO significantly recorded lower MDA in meat compared to the others fed diets contained SO. Birds fed NZO diets significantly recorded the lowest carcass, breast and thigh skin percentages. Also, it significantly reduced breast drip loss and significantly enriched their meat with zinc by 41.4 and 10.6%, respectively relative to other two zinc sources. Concerning zinc levels, there were no significant differences between the two levels in all parameters studied except in muscles Zn content which was significantly increased by increasing dietary Zn level while, high dietary Zn level significantly reduced total lipids in muscles. It could be concluded that among the examined factors using palm oil, nano zinc oxide at level of 80 mg/kg diet improved carcass traits and meat quality of broiler reared under summer season conditions. While more researches concerning using nano-elements in broiler diets and its safety to human consumption are needed.
 
 
 
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