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Articles by Gh. Moghaddam
Total Records ( 5 ) for Gh. Moghaddam
  H.A. Ghasemi , A.M. Tahmasbi , Gh. Moghaddam , M. Mehri , S. Alijani , E. Kashefi and A. Fasihi
  An experiment was performed to assess the potential of microbial phytase and Saccharomyces cervisiae (Sc47) on improving the utilization of phytate P and subsequently on broiler performance fed wheat-corn-soybean meal basal diet from 7 – 49 day of age. A 3x2x2 factorial arrangements of treatments were used: 3 levels of Sc47 (0.0, 0.1 and 0.2 % of diet); two levels of phytase (0 and 800 U / kg of diet) and two levels of nonphytate P (50% and 100% of NRC (1994) recommended). Each treatment contained 3 pens with 15 birds/pen. Measurements included body weight gain (BWG), feed conversion ratio (FCR), serum parameters, Tibia ash, P and Ca retention. During the experimental periods effects of Non phytate phosphorous (NPP) levels on all measured parameters was significant (P< 0.01). Phytase inclusion at 800 U/kg of diet induced improvement (P< 0.05) in BWG, FCR, tibia ash, P and Ca retention and also increased concentration of serum P and protein (p< 0.05). Inclusion phytase on the diet containing the 50% NRC (1994) NPP resulted improvement on the utilization of phytate P and Ca by increasing P and Ca retention which led to an increase in toe ash content. The experiment demonstrated dietary supplementation of Saccharomyces cervisiae had a positive influence on the bird`s performance. However, significant improvement (P< 0.05) was observed in BWG and FCR during starter phase in chickens fed the diets containing Saccharomyces cervisiae. Maximum responses to live yeast achieved when broiler chicks were fed diet with 100% NRC (1994) recommended available phosphorous. In conclusion, the finding of this study suggested combination of supplemental phytase and live yeast (Sc47) had some beneficial effects on improving the nutritive value of broilers diets in particular in the low level of NPP.
  Sh. Golzar Adabi , Gh. Moghaddam , A. Taghizadeh , A. Nematollahi and T. Farahvash
  The effect of two dietary levels of L-carnitine and vegetable fat powder on broiler breeder fertility, hatchability, egg yolk and serum cholesterol and triglyceride was studied. Two hundred fifty female and twenty five male (Classic Hubbard parent stock) were distributed randomly in five groups of 50 with five replicate of 10 females and one male. Two levels of L-carnitine 0, 60 ppm (for females) and 0, 500 ppm (for males) and vegetable fat powder (0, 1.5%) and a diet with high lysine and methionine (0.3%) fed for both of male and female within one of treatment were used in a complete random design of treatments. The parameters as hatchability, fertility, egg weight, albumen height, Haugh unit, color of yolk, shell thickness, shell strength, yolk weights, egg yolk and serum cholesterol and triglyceride were measured. No significant differences were observed in external and internal egg quality. Supplemented diet with L-carnitine had effect on hatchability (P< 0.05) and fertility (P< 0.01). L-carnitine had no effect on egg production except on fifth and sixth weeks (P< 0.01). None of experimental diet had no effect on male serum cholesterol, serum triglyceride in both sex and total yolk cholesterol but L- carnitine had effect on female serum cholesterol (P< 0.05). L- carnitine had decreased egg yolk cholesterol (mg/gr) (P< 0.05). Yolk weight increase in response to dietary supplementation of L-carnitine(P< 0.05) and L-carnitine content of egg yolk increase with L-carnitine supplementation (P< 0.05).
  A. Nematollahi , Gh. Moghaddam and F. Nyiazpour
  This survey was designed to study the parasitological features and clinical symptoms due to the infestation of gastrointestinal nematodes in sheep. Two sheep naturally infested to gastrointestinal nematodes were obtained and were selected as egg donors. For experimental infestation eight free worm lambs (5-6 months old) were selected and 50000 of third stage larvae of gastrointestinal nematodes that were obtained from eggs of donor sheep were fed to each of them. Four other lambs received placebo (control group). Daily stools from infected sheep were taken for parasitological examinations. Body weight and clinical symptoms were recorded. Twelve, 21, 35 and 60 days after infestation two lambs were slaughtered and established worms from fed larvae were counted. Results were analyzed by ANOVA. No clinical symptoms (except anemia) were found in the animals during this study however body weight is monitored during 60 days post infestation and indicated a significantly difference between live weight in infested and control groups. The adult worms occurred from fed larvae were 2665 (5.3%) and maximum E.P.G at 35th day post infestation was recorded. The lengths of male and female worms in the abomasums were 13.2 and 20.8 mm respectively. Also worms at 35th day post infestation had high size.
  H. Tayefi-Nasrabadi , Gh. Moghaddam , Z. Rajabi and Gh. Dehghan
  For clarifying some possible mechanism of cadmium toxicity, the effect of increasing amounts of Cd2+ ion on peroxidase activity was investigated in vitro in serum of cow. The H2O2-mediated oxidation of o-dianisidine was used to assess the peroxidase activity. Results show that after preincubation of serum with 0.25-100 mM Cd2+ concentration for 5 min, peroxidase activity was inhibited compared to the control and decreased rapidly with increasing metal concentrations. The enzyme was completely inhibited after 5 min preincubation in 100 mM Cd2+. When the preincubation of serum and Cd2+ was prolonged to 0.5, 1 and 24 h, the enzymatic activity decreased more rapidly with increasing metal concentration and the enzyme was completely inhibited at lower metal concentrations (at 50 mM Cd2+ after 30 min preincubation, at 30 mM Cd2+ after 60 min preincubation and at 5 mM Cd2+ after 24 h). By considering of long biological half-life of cadmium in body of animals, it suggested that the damage caused by exposure to heavy metals is often not only dose-dependent, but also time-dependent. Even though detoxifying enzymes may not show any effect after brief exposure to low concentrations of heavy metals, prolonged incubation will affect the enzymatic activity, leading eventually to complete inactivation.
  A. Nematollahi , Gh. Moghaddam and F. Niyazpour
  This study was conducted on 1090 chicks (2-6 weeks of age) from 218 broiler farms stayed in Tabriz northwest of Iran. These chicks were submitted for post-mortem and parasitological examinations. Five Eimeria sp. were identified: E. acervulina, E. tenella, E. necatrix, E. maxima and E. mitis. The overall prevalence of Eimeria sp. among examined farms was 55.96% (122 of 218 farms). E. acervulina was the most prevalent species (23.58%). Prevalences did not vary by flock size. Also, neither the use of coccidiostat nor previous coccidiosis clinical outbreaks were associated with the prevalence of infestation. The prevalence of infestation increased with the age of the chickens. Chickens with 5 weeks of age showed the highest prevalence of infestation.
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