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Articles by T.A. Salah Eldin
Total Records ( 3 ) for T.A. Salah Eldin
  N.A. Selim , N.L. Radwan , S.F. Youssef , T.A. Salah Eldin and S. Abo Elwafa
  This study was conducted to evaluate the efficiency of different selenium (Se) sources and levels in corn-soybean meal broiler diets. For that, 400 day-old unsexed Arbor Acres broiler chicks were allocated to 10 experimental treatments in a 5 (sources) x 2 (levels) factorial arrangement. Five Se sources were tested; (1) sodium selenite (NaSe) as inorganic form; (2) selenomethionine (Se-Yeast) as organic form; (3) Zinc-L-selenomethionine (Zn-Se-Meth) as more recent organic form; (4) powder form of Nano Se form (P-Nano Se) and (5) Liquid form of Nano Se (L-Nano Se). Also two inclusion of Se levels in diets; 0.15 and 0.30 ppm, were examined. The inorganic and organic forms of examined Se were obtained from commercial suppliers while both powder and liquid forms of Nano Se were prepared immediately before starting feeding phases of the experiment. The prepared 80 nm Se nano-particles were synthesized by chemical reduction method and characterized by Transmission Electron Microscope, X-ray diffraction and spectrophotometry. Three phases (1-10, 11-24 and 25-40 d) of feeding were applied and all birds were kept under similar management conditions. Parameters of growth performance, carcass characteristics and concentration of Se in both liver and thigh muscles were investigated. Also assay of Malnodialdhyde (MDA) was carried out in frozen (6 months at -20°C) thigh muscles to investigate the oxidation status of broiler meat. The obtained results showed significant improvement of growth performance and Se concentration in liver and thigh tissues either due to using organic or nano forms of Se, or by increasing the inclusion Se level from 0.15 to 0.30 ppm in broiler diets. While carcass abdominal fat%, giblets% and MDA content in thigh muscles did not affected due to Se sources or levels. Liver showed grater Se concentration than thigh muscles. The overall experimental results showed that using Se-Yeast or Zn-Se-Meth as organic forms of Se, or L-Nano Se as nano form of Se at level of 0.30 ppm in broiler diets or its equivalent in drinking water, respectively, is more effective to get better growth performance and quality of broiler meat. But further studies about the safety of using nano form of selenium as feed additives are needed.
  Nadia L. Radwan , T.A. Salah Eldin , A.A. EL- Zaiat and Mona A.S.A. Mostafa
  The main target of this study was to evaluate the effect of dietary Nano-Selenium (Nano-Se) supplementation on selenium (Se) content and oxidative stability in table eggs and productive performance of laying hens. One hundred and eighty silver Montazah laying hens (Egyptian local developed strain) aged 32 weeks were housed in individual cages in a semi-open house. Birds were divided randomly into six treatments and fed a basal diet (vitamins and minerals mixture without Se). The experiment involved a 2 x 3 factorial arrangement, 2 Se sources (sodium selenite and Nano-Se) and 3 levels of each source (0.10, 0.25 and 0.40 ppm). Feed and water were provided ad libitum throughout the experimental period (three month). The prepared 80 nm Se nano particles were synthesized by chemical reduction method and characterized by Transmission Electron Microscope, X-ray diffraction and spectrophotometry. Different Se levels of sodium selenite or Nano-Se did not affect egg weight, feed intake and most of egg quality. Egg production percentage and egg mass increased and the feed conversion ratio significantly improved, by adding Nano-Se in layer diets. Increasing Se level from 0.10 up to 0.40 ppm either sodium selenite or Nano-Se significantly increasing Se content in eggs and the highest concentration was recorded with high level (0.40 ppm) of Nano-Se. Moreover, increased glutathione peroxides (GSH-Px) activity, with reduction of Malondialdehyde (MDA) content in yolk of stored eggs at room temperature for 15 days. Adding 0.25 ppm of Nano-Se recorded the lower saturated to unsaturated fatty acids ratio thus improved the fatty acid profile and oxidative stability during storage. Nano-Se significantly reduced total lipids, total cholesterol and increased HDL-cholesterol to total cholesterol ratio in maternal hens (plasma and yolk). The main histopathological findings of livers for all treatments were fatty liver with focal aggregation of inflammatory cells. While the spleen showed congestion of blood vessels. Conclusions: It can be concluded that, supplemental layer diets with 0.25 ppm of Nano-Se was effective in improving the productive performance and GSH-Px activity of layer and producing Se enriched egg which could supply 50% (35 μg) of the human Se Recommended Daily Allowances. This give a hand in solving the problem of Se deficiency in food for human.
  N.A. Selim , N.L. Radwan , S.F. Youssef , T.A. Salah Eldin and S. Abo Elwafa
  This study was conducted to evaluate both physiological and immunological efficiency and toxicological effects of different selenium (Se) sources and levels in corn-soybean meal broiler diets. For that, 400 day-old unsexed Arbor Acres broiler chicks were allocated to 10 experimental treatments in a 5 sources x 2 levels factorial design. Five Se sources were tested; (1) sodium selenite (NaSe) as inorganic form; (2) selenomethionine (Se-Yeast) as organic form; (3) Zinc-L-selenomethionine (Zn-Se-Meth) as more recent organic form; (4) powder form of Nano Se form (P-Nano Se) and (5) Liquid form of Nano Se (L-Nano Se). Also two inclusion of Se levels in diets; 0.15 and 0.30 ppm, were examined. The inorganic and organic forms of Se were obtained from commercial suppliers while both powder and liquid forms of Nano Se were prepared immediately before starting feeding phases of the experiment. The prepared 80 nm Se nano-particles were synthesized by chemical reduction method and characterized by Transmission Electron Microscope, X-ray diffraction and spectrophotometry. Three phases (1-10, 11-24 and 25-40 d) of feeding were applied and all birds were kept under similar management conditions. Parameters of blood picture, immunity status, antioxidant status, some plasma constituents and T3 hormone were investigated. Also histological examination of liver samples was carried out at 40 days of age. The obtained results showed significant improvement of some hematological parameters, cellular immunity and antioxidant status either due to using organic or nano forms of Se, or by increasing the inclusion Se level from 0.15 to 0.30 ppm in broiler diets. While humeral immunity against Newcastle Disease Virus and Avian flow Virus (H5N1), plasma proteins, activity of liver enzymes and malnodialdhyde (MDA) content in plasma did not affected due to Se sources or levels. Concentration of T3 hormone significantly increased by increasing Se level from 0.15 to 0.30 ppm in the diet. The histological examination of liver showed some severe pathological changes due to increasing Se level from 0.15 to 0.30 ppm for most sources while using 0.15 ppm of Se from inorganic or organic forms of Se showed normal histological structure of liver tissues. The overall experimental results showed although using Zn-Se-Meth as organic form of Se or L-Nano Se as nano form of Se or increasing the supplemental Se to 0.30 ppm in broiler diets or its equivalent in drinking water is more effective to get better, physiological, immunological and antioxidant status of broiler chicks. Inclusion Se-Yeast as organic form of Se in broiler diets at level 0.15 ppm was more save to liver tissues and kidney function. Further studies about the safety of using nano form of selenium as feed additives are needed.
 
 
 
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