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Articles by Naser Maheri Sis
Total Records ( 2 ) for Naser Maheri Sis
  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).
  Mohammad Salamatazar , Ramin Salamat Doust-Nobar , Naser Maheri Sis , Habib Aghdam Shahryar and Yahya Asadi
  The aim of this study was to determine effects of the increasing concentrations of thyme methanolic extract (0 and 0.3 ml/30 ml buffered rumen fluid) on Soybean Meal (SBM) degradability were studied by in vitro gas producing techniques. Fermentation of treatment samples were carried out with rumen fluids obtained from three mature cannulated steers in times of 2, 4, 6, 8, 12, 24, 48, 72 and 96 h were performed. The results showed that gas volume at 72 h incubation time (for 200 mg dry samples), of soybean meal and thyme methanolic extract (0.3 ml/30 ml buffered rumen fluid) were 62.91 and 37.64 (ml/200 mg DM) respectively. The gas production from soluble fraction (a), the gas production from insoluble fraction (b), rate constant of gas production during incubation (c) and the potential gas production (a+b) contents of soybean meal were 4.42 (ml/200 mg DM), 67.1 (ml/200 mg DM), 0.113 (ml/h) and 71.52 (ml/200 mg DM), while for thyme methanolic extract (0.3 ml/30 ml buffered rumen fluid) were 1.006 (ml/200 mg DM), 42.8 (ml/200 mg DM), 0.033 (ml/h) and 43.81 (ml/200 mg DM) respectively.
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