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Articles by K. Nazeradl
Total Records ( 4 ) for K. Nazeradl
  S.R. Riyazi , Y. Ebrahimnezhad , K. Nazeradl , N. Maheri-Sis , R. Salamatdust and T. Vahdatpour
  One hundred and forty four of Hy-line (W-36) laying hens from the age of 44 to 56 weeks were used to evaluate the effects of replacing different levels of rapeseed meal with soybean meal on egg quality characteristics of commercial laying hens. The rapeseed meal was replaced with soybean meal at the levels of 0 (control), 5, 10 and 15% for 12 weeks. Hens were distributed in multi-observational completely randomized block design with 4 treatments, three replicates and 12 hens in each replicate. The parameters used to assess were haugh unit, shell thickness, shell weight, shell strength and yolk index. Results showed that addition of 10% rapeseed meal in diets increased (p<0.05) eggshell weight. With increasing of rapeseed meal level in diets, yolk index had showed decline (p<0.05). No specific trend was observed on the effect of rapeseed meal on haugh unit, shell thickness and shell strength, however these parameters were higher in groups that fed 10% rapeseed meal. We did not observe any health problems of the hens during the experiment.
  R. Salamatdoustnobar , K. Nazeradl , A. Ayazi , A. Hamidiyan , A. Gorbani and A. Fani
  During many years, the main objective of the poultry meat industry was to improve body weight and feed efficiency of the birds. However, in the modern poultry industry, there are other parameters that need to be taken into consideration such as low cholesterol, etc. deposition on the body. For this aim, an experiment was conducted to evaluation canola oil effects on the Iranian native Turkeys serum lipids and cholesterol. Ninety male Turkey chicks were randomly distributed into 3 experimental with three replicate for each groups. Diets were isonitrogenous and isoenergetic were given to Turkey chicks throughout four period of breeding (4th-8th, 8th-12th, 12th-16th and 16th-20th). The blood sample taken at the end of breeding period and serum values for triglycerides and total, High-Density-Lipoprotein (HDL) and LDL (calculated by Friedewald method). Data was analyzed with One Way (ANOVA) and means compared with Duncan test. For serum values were not found significantly different (p<0.05) in triglycerides and VLDL and in CHOL, LDL and HDL (p<0.05) were significantly different compared control group. Finally, our results shown that canola oil has a significant impact on lipid metabolism in native Turkey and could improve their serum lipid profile.
  H. Mansoori , A. Aghazadeh and K. Nazeradl
  The objective of this study was to investigate the effects of dietary supplementation with sunflower oil seed (Raw-or Heat-treated) in two levels of 7.5 or 15% on unsaturated fatty acids in milk fat and performances of high-yielding lactating cows. Twenty early lactating Holstein cows were used in a complete randomized design. Treatments included: CON, control (without sunflower oil seed). LS-UT, 7.5% raw sunflower oil seed. LS-HT, 7.5% heat-treated sunflower oil seed. HS-UT, 15% raw sunflower oil seed. HS-HT, 15% heat-treated sunflower oil seed. Experimental period lasted for 4 weeks with first 2 weeks used for adaptation to the diets. Supplementation with 7.5% raw sunflower seed (LS-UT) tended to decrease milk yield with 28.37 kg day-1 compared with the control (34.75 kg day-1). Milk fat percentage was increased with the HS-UT treatment that obtained 3.71% compared with CON that was 3.39% and without significant different. Milk protein percent was decreased by high level sunflower oil seed treatments (15%) with 3.18% whereas CON treatment is caused 3.40% protein. The cows fed added Low Sunflower Heat-Treated (LS-HT) produced milk with the highest content of total unsaturated fatty acid with 32.59 g/100 g of milk fat compared with the HS-UT with 23.59 g/100 g of milk fat. Content of C18 unsaturated fatty acids in milk fat increased from 21.68 g/100 g of fat in the HS-UT to 22.50, 23.98, 27.39 and 30.30 g/100 g of fat from the cow fed HS-HT, CON, LS-UT and LS-HT treatments, respectively. C18:2 isomers of fatty acid in milk were greater by LS-HT supplementation with significant effect (p<0.05). Total of C18 unsaturated fatty acids content was significantly higher in milk of animal fed added low heat-treated sunflower (7.5%) than those fed with high sunflower. In all, results of this study showed that diet cow's supplementation with sunflower oil seed tended to reduce milk production of lactating cows but can improve C18 unsaturated fatty acid content in milk fat. About 7.5% level of sunflower oil seed that heated seemed to be the optimal source to increase UFA production.
  M. Fathi , K. Nazeradl , Y. Ebrahim Nezhad , H. Aghdam Shahryar , M. Daneshyar and T. Tanha
  Major objectives of this study were to assess antioxidant protection in plasma and whole liver in broilers with pulmonary hypertension syndrome. The experiment was conducted with 160, 1 day old male broilers (Ross 308). The chickens were divided in 2 groups of 4 replicates and 20 chicks for any replicate. One group of these chickens was raised in normal temperature (control without PHS) treatment and the other group was raised in cold temperature (with PHS) treatment for induce pulmonary hypertension syndrome. Mortality was inspected to determine cause of death and diagnose of PHS. For evaluation of antioxidant status, the parameters that were determined in plasma and liver include: Glutathione Peroxidase (GPX), Superoxide Dismutase (SOD), Total Antioxidant Status (TAS) and Malondialdehyde (MDA). Sampling of blood and liver tissue were determined at day 21 and 42. At end of the experiment (week 6), 2 chicks from each replicate were randomly selected and slaughtered. The heart was removed, the right ventricle was dissected away from the left ventricle and septum then ratio of Right Ventricle weight to Total Ventricle weight (RV/TV) calculated too. The results of the experiment indicated that in plasma (GPX) and (SOD) activity were elevated in broilers with PHS compared to controls. It was also, PHS group had low TAS compared to control. But in liver, just GPX (not for SOD) was elevated in PHS group than control. The levels malondialdehyde equivalents an indicator of lipid oxidation subsequent to generated oxidative stress at plasma and liver tissue was significantly higher in PHS group compared control. RV/TV ratio and mortality due to ascites, also were significantly affected by treatments as PHS group had greater RV/TV and mortality due to ascites mortality percentage compared to control.
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