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Articles by B. Abtahi
Total Records ( 3 ) for B. Abtahi
  M. Bahrekazemi , A. Matinfar , M. Soltani , B. Abtahi , I. Pusti and A. Mohagheghi
  The effects of egg retention time in the abdominal cavity after ovulation on egg viability were studied in Caspian brown trout (Salmo trutta caspius). Eggs were retained in the parental abdominal cavity for 40 days post ovulation. Partial volumes of eggs stripped from 10 individually identified females and fertilized with fresh semen obtained from 8 males at 10 days intervals for 4 stages. The biochemistry of the eggs and ovarian fluid were studied to investigate possible links with post-ovulatory oocyte aging. The eyeing and hatching rate of the eggs declined with over-ripening time: that is, the expected amounts (90.60±6.28% for eyeing and 86.33±6.82% for hatching) in newly ovulated eggs (0-10 days post ovulation) decreased to 0.67±1.34% and 0.49±0.98%, respectively, in over-ripened eggs (30-40 days post ovulation). However, larval abnormalities remained constant for 30 days after ovulation. Over the course of post-ovulation oocyte aging, the pH of the ovarian fluid significantly decreased and the concentration of glucose, protein, calcium, iron and aspartate aminotransferase activity significantly increased. Moreover, the concentration of protein, triglycerides and aspartate aminotransferase activity in the eggs also changed. The present study demonstrated that the best time to take Caspian brown trout eggs after ovulation at 7±0.6°C was up to 10 days post ovulation. Also, egg viability was related to both ovarian fluid parameters (e.g., pH, protein, aspartate aminotransferase, glucose, cholesterol, triglycerides, iron, calcium) and egg parameters (e.g., cholesterol, triglycerides, iron, aspartate aminotransferase) which can be used to detect egg quality defects associated with oocyte post-ovulatory aging.
  M. Tatina , M. Bahmani , M. Soltani , B. Abtahi and M. Gharibkhani
  This study was conducted in order to characterize the different levels of dietary vitamin C and vitamin E on some of hematological and biochemical parameters of sterlet. For this purpose 270 sterlet (Acipenser ruthenus) were divided into 18 groups. Three levels of vitamin E (0, 100 and 400 mg kg-1 diet) and vitamin C (0, 100 and 400 mg kg-1 diet) and their combination were used to prepare nine experimental diets. Each of nine experimental diets was fed to fish in 2 tanks (2 replicates). The fish were fed 3% of their wet b.wt. per day for a 100 days period. Blood samples were obtained from three fish of each tank at the end of experiment. The results reveal that Fish fed diets containing 100 mg kg-1 vitamin E and 400 mg kg-1 vitamin C (diet 7) had the highest WBC (p>0.05). Also, significantly higher RBC was observed in diets 3, 4, 5, 6 and 9 than those of the other diets in which different levels of each vitamin without any regulation exists. The hematocrit percentage did not differ significantly in fish fed the different diets (p<0.05). Also, there was no significant difference in the mean amount of total protein, cortisol, glucose and triglyceride between the fish fed with the different diets designed for this experiment (p>0.05). On the other hand, fishes fed diets without vitamin C but different levels of vitamin E (diets 3 and 6) had significantly higher amounts of cholesterol compared with fish fed with other diets.
  A.-H. Mohammadpour , F. Nazemian , B. Abtahi , M. Naghibi , S. Rezaee , M.-R.A. Nazari and O. Rajabi
  Area under the concentration curve (AUC) of mycophenolic acid (MPA) could help to optimize therapeutic drug monitoring during the early post–renal transplant period. The aim of this study was to develop a limited sampling strategy to estimate an abbreviated MPA AUC within the first month after renal transplantation. In this study we selected 19 patients in the early posttransplant period with normal renal graft function (glomerular filtration rate > 70 mL/min). Plasma MPA concentrations were measured using reverse-phase high-performance liquid chromatography. MPA AUC0–12h was calculated using the linear trapezoidal rule. Multiple stepwise regression analysis was used to determine the minimal and convenient time points of MPA levels that could be used to derive model equations best fitted to MPA AUC0–12h. The regression equation for AUC estimation that gave the best performance was AUC = 14.46 * C10 + 15.547 (r2 = .882). The validation of the method was performed using the jackknife method. Mean prediction error of this model was not different from zero (P > .05) and had a high root mean square prediction error (8.06). In conclusion, this limited sampling strategy provided an effective approach for therapeutic drug monitoring during the early posttransplant period.
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