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Articles by R. Taherkhani
Total Records ( 5 ) for R. Taherkhani
  M. Zaghari , R. Gaykani , M. Shivazad and R. Taherkhani
  An experiment was conducted to determine the effect of phytase supplementation on old layer hens performance and evaluation of using phytase nutrient equivalency values with comparison to those fed conventional diet. In this experiment 288 Hy-line W-36 hens were used from 60 to 72 weeks of age. The treatments consisted of a control diet (C) without phytase, control diet supplemented with 300 FTU kg-1 phytase over the top (C+P) and the third diet contained 300 FTU kg-1 phytase which calculated nutrient equivalency values for phyatse (100 E). Hen day egg production for the C, C+P and 100 E group were 75.25, 77.25 and 66.0%, respectively. As egg production declined, FCR increase significantly (p<0.05). There were no significant differences in egg specific gravity, egg shell thickness and breaking strength, egg and toe mineralization among dietary treatments. Results indicated that using phytase nutrient equivalency did not prove energy and protein utilization but improved phosphorus utilization in old layer hens.
  M. Ghaffari , M. Shivazad , M. Zaghari and R. Taherkhani
  An experiment was conducted to investigate effects of different level of ME in diets of as hatched broiler chicks with respect to method of formulation of Amino Acid (AA) requirement based on total and digestible AA requirements. The experiment was carried out using a complete block design with factorial arrangement. Main factors were included method of formulation of AA requirement (total and digestible) and different ME level (7 dietary ME from 3175 Kcal diluted to 2575 Kcal). Experimental period began at 10 days of age and lasted in 47 days of age. Weight gain and feed consumption were recorded for grower (10-28 days of age) and finisher (28-47 days of age) separately and then feed conversion ratios were computed. In grower period chicks received high ME diets had significantly lower feed intake, but they had higher weight gain and they also utilized their feed more efficiently compared to those received lower levels of ME. Method of formulation of AA requirement had no significant effect on none of the measured parameters during grower period. In finisher period, chicks fed diets formulated on digestible AA requirement had significantly lower feed intake and feed conversion ratio. Different levels of ME had no significant effect on feed intake and weight gain during finisher period. Results obtained in present study suggest that whereas method of formulation of AA requirement in grower period have no beneficial effect, formulation of diets based on digestible AA is advantageous in finisher period.
  M. Ghaffari , M. Shivazad , M. Zaghari and R. Taherkhani
  In order to evaluate the effects of different levels of energy and method of formulation of Amino Acid (AA) requirements of diets, this experiment was conducted using 294 male broiler chicks. The experiment was carried out using a complete block design with a 7×2 factorial arrangement. Factors were included different level of energy (7 energy levels) and method of formulation of diets AA requirements (total and digestible). Method of formulation of AA requirement had no significant effect on cumulative feed consumption. Formulation of diet based on total or digestible AA had no significant effect on weight gain whereas high ME diets resulted in higher weight gain. Diets formulated based on total or digestible AA had feed conversion ratios that were not significantly different. Abdominal fat pad were significantly lower in chicks fed diets formulated on digestible AA basis. Energy content of diets affected fat pad significantly. Abdominal fat pad increased significantly as ME content of diets increased. Results obtained in our study suggest that even whit corn soybean meal based diets, formulation of diets AA requirement may be a beneficial tool for optimization of performance.
  Mohamad Ibrahim Mohamad , Mohammad Ali Nekooie , R. Taherkhani , A.L. Saleh and Shaiful Amri Mansur
  Population growth and following by that, increasing the demands, lead the industries such as construction, to the manufacturing production. Prefabricating technology or Industrialized Building System (IBS) is the most effective process among manufacturing processes. This manufacturing process also can be employed for floating urbanization as a new approach of flood adaptation method. There is a high potential for applying IBS technology in floating urbanization. Thus, this study identified a strategic plan to look at IBS as an answer to a housing shortage problem and flood protection. The SWOT analysis has been employed to identify and evaluate the internal and external environments influencing on the IBS implementation for floating urbanization in Malaysia. The strategic plan is demonstrated on educational sector, R and D and manufacturing sector.
  M. Shivazad , M. Bejaei , R. Taherkhani , M. Zaghari and M.M. Kiaei
  An experiment was conducted to investigate the effects of glucose injection and feeding Oasis immediately posthatch on the subsequent performance of broilers. Experiment was carried out using a completely randomized design with factorial arrangement (2x2x2x2). Factors were included egg weight (small eggs weighting between 50 to 60 g and medium eggs weighting between 61 to 70 g), glucose injection (Control with no injection and 0.3 mL glucose injection), feeding in transportation boxes during shipping period (chicks fed Oasis and those hold with no access to feed and water) and house arrival feeding (chicks that receive feed immediately at arrival and those hold for an additional 12 h without feed). Treatments were replicated three times with 25 chicks per each. Live weight and feed intake were measured for each experimental unit at 7, 21 and 42 days of age and then weight gain and feed: gain was calculated. On days 3, 21 and 42, two chicks from each replicate were killed for carcass analysis including yolk sac residue weight (third day), duodenum, jejunum and ileum weight and length and also liver and gizzard weight. Results show an improved Weight Gain (WG) and feed efficiency (p<0.05) in chicks from medium eggs compared to those from small eggs. A significant interaction (p<0.05) between glucose injection and egg weight was observed, so that chicks of small eggs with glucose injection show a significant (p<0.05) depression in WG. Chicks with immediate access to Oasis had greater (p<0.05) duodenum and jejunum relative weight on day 3 and duodenum on day 42. Oasis fed chicks also had better WG and breast meat yield (p<0.05) while feeding Oasis did not influence feed efficiency. Feeding Oasis also increased yolk utilization. Chicks with delayed access to feed in the house compensate their initial decreased WG during the later stages. Glucose injection had no beneficial effect, but immediate access to feed in posthatch chicks improved their performance.
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