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Articles by Yahya Ebrahim Nezhad
Total Records ( 2 ) for Yahya Ebrahim Nezhad
  Yahya Ebrahim Nezhad , Naser Maheri Sis , Abolfazl Aghajanzadeh Gholshani , Yaghob Saedi and Reza Aminvakili
  This experiment was conducted to evaluate the combined effect of citric acid and microbial phytase on the concentration of minerals of serum and parameters of mineralization of tibia in Hy-line commercial layers (W-36) in 53-64 weeks of age. One hundred and ninety two of laying hens were tested. The experimental design was completely randomized design with a 3x2 factorial arrangement with three levels (0, 2 and 4%) of citric acid and two levels (0.0 and 300 FTU kg-1) of microbial phytase in low available phosphorus diets with 6 treatments, 4 replicates and 8 hens in each replicate. The concentration of zinc, copper and manganese of serum and ash, calcium and phosphorus of tibia was evaluated. The results showed that interaction between citric acid and microbial phytase significantly affected the concentration of copper in serum, tibia ash and tibia ash calcium percentage (p < 0.01). Using 300 FTU kg-1 microbial phytase into low available phosphorus diets increased tibia ash phosphorus percentage (p < 0.05).
  Mokhtar Fathi , Kambiz Nazer Adl , Yahya Ebrahim Nezhad , Habib Aghdam Shahryar , Mohsen Daneshyar and Taimor Tanha
  An experiment with 320, 1 day male broilers (Ross 308) was performed to evaluate the effects of Arginine (Arg) and Vitamin E (VE) supplementation on antioxidant status, some biochemical parameters and ascites mortality in broiler chickens with cold temperature induced Pulmonary Hypertension Syndrome (PHS). The chickens were distributed between 16 pens of 20 each and each 4 allocated to each of experimental treatments. Treatment 1 was the birds fed a commercial corn-soybean meal based diet (control), Treatment 2; the birds fed the control diet supplemented with 400 IU VE kg-1 of feed (VE), Treatment 3; the birds fed the control diet supplemnetd with 0.3% Arg in drinking water and Treatment 4; the birds fed the control diet supplemented with 400 IU VE and 0.3% Arg (Arg-VE). At day 14, temperature was reduced to amplify the incidence of pulmonary hypertension. Hematological and oxidants status parameters (in serum and liver) were determined at day 21 and 42 of age. Right/total Ventricular weight ratio (RV/TV) was recorded at the end of the experiment (week 6). The results of experiment showed that Arg birds at day 421 had the lower (p≤0.05). RV/TV ratio and ascites mortality yet had improved growth performance parameters. Red Blood Cell (RBC), Hematocrit (Hct) and Hemoglobin (Hgb) was significantly lower in Arg and Arg-VE birds as compared to other birds at day 42 of age. Plasma Malondialdehyde (MDA) was significantly lower in Arg and Arg-VE birds as compared to other birds at day 42. Plasma Glutathione Peroxidase (GPX) activity was greater (p≤0.05) in both the Arg and Arg-VE birds as compared to other groups at day 42. Plasma and liver Superoxide Dismutase (SOD) activity was not affected by none of the Arg or VE supplementation. In summary, level of Arg but not for VE used in this experiment, synchronic, some change effects on MDA and TAS in plasma or hematological parameters had positive effects on cardio pulmonary performance, growth performance and ascites mortality in broiler encounter with low temperature and PHS.
 
 
 
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