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Articles by Behnaz Mahdavi
Total Records ( 2 ) for Behnaz Mahdavi
  Sara Bonabi , Aliasghar Sadeghi , Parvin Showrang , Hamidreza Khodaei , Behnaz Mahdavi and Mehrdad Modaresi
  The neonatal calves, due to their species and special placenta’s structure are born without immune system for contrasting the pathogenic factors and rely on the Ig supply of colostrums through passive immunity transfer. The goal (purpose) of this study was surveying the effects of commercial colostrums (Globigen) on calves health, immunity and blood factors. Total 21 Holstein calves were selected in 3 groups in a random model in this study. The experimental group was as follow: Group 1 (7 calves)-control group fed with maternal colostrums. Total weight = 5.5 kg maternal colostrums in 24 h. Treatment 2 (7 calves) fed with half maternal colostrums+half Globigen® Colostrums. Total weight = 5.5 kg in 24 h (2.75 kg maternal colostrums+2.75 g Globigen® Colostrums solved in 2.75 L warm water). Treatment 3 (7 calves) fed with Globigen® Colostrums. Total weight = 5.5 kg in 24 h (550 g solved in 5.5 L warm water). Blood samples collected from all calves 2 times: After birth and 24 h after that again and blood factors inclusive serums density of IgG , 1 IgG , IgY, cholesterol, triglycerides and glucose, protein, albumin, globulin, ALT, AST and keratin and also 2 weight and fecal score of the calves were surveyed. The SAS98 software was used for statistics analyses and the Duncan test method between comparison of averages (p<0.05) was used to comparison between averages. In this study, immunoglobulins did not increase by Globigen using. The calf’s weight had additive effect than the treatments in control group. The calves in 2nd group were suffering from diarrhea and the number of mortality in 2nd group was more than the other groups. Base on the obtained results, Globigen use as a colostrums alternative is not practical and this product can only be used as a colostrums supplement.
  Behnaz Mahdavi , Hamid Reza Khodaei , Reza Moghiminasr , Mohammad Chamani and Mehrdad Modaresi
  Conjugated Linoleic Acid (CLA) is a group of long-chain unsaturated fatty acids with >1 double bond and a mixture of 28 isomers of linoleic acid (C 18:2) and it is counted as one of the essential fatty acids. The main purpose of this study was to investigate the effect of CLA on some reproductive hormones and ram semen quality in non-reproductive season. In this study, 6 heads of 3-4 years old rams with the average weight of 90 kg were selected. Diet rams were used by NRC. Rams were randomly divided into 3 groups and were treated by CLA for 30 days. The 1st group (as a control group) did not receive CLA. The 2nd group received 0.5 g day¯1 and the 3rd group received 1g day¯1 of CLA. Consumed CLA included the c9, t11 and t10, c12 isomers. The blood testing was done on rams every 15 days (0, 15 and 30) and sperm measurements were performed every 15 days using an artificial vagina. Data analysis was performed by SAS software. Also, mean comparison was done using Duncan’s test method (p<0.05). Obtained results showed that the serum concentration of testosterone hormone was decreased numerically, as well as the concentration of FSH (Follicle-Stimulating Hormone). However, the concentration of LH (Luteinizing Hormone) was increased. Also, the CLA had a significant effect on leptin concentration. CLA in oral form can reduce the concentration of testosterone and increase sperm motility in rams. According to the obtained results in this survey, CLA is knowingly effective on reproduction. In rams, it caused an increase in dihydroxy testosterone concentrations, however it reduced the total testosterone concentration. Also, CLA caused a significant increase in total motility and progressive motility of sperms in ram.
 
 
 
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