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تعداد نتایج: 728859 فیلتر نتایج به سال:
this experiment was conducted to evaluate reproductive indices and provide appropriate solutions to improve the reproductive efficiency of dairy cattle in kermanshah province. with reference to forty-eight dairy industrial herds available at different cities of the province, a questionnaire containing quantitative measures were completed to assessing the reproductive parameters of 5397 dairy co...
The study was conducted at Ardaita Agricultural Technical Vocational Education Training (ATVET) college dairy farm, to evaluate the reproductive performance of Holstein Friesian and its crosses with Boran cattle breeds. Data collected between 2000 and 2015 on reproductive traits (n=2632) were studied and analyzed using general linear model procedure. The overall estimated means for age at first...
Background: Open hamstring lengthening (oHSL) is commonly performed to decrease knee contracture and improvegait and posture for children with spastic diplegia. Furthermore, percutaneous hamstring lengthening (pHSL) is alsogaining popularity as an alternative to the open approach. This study aimed to compare the results of pHSL versusoHSL and to determine the efficacy and safe...
in civil engineering concrete is a material combined of hydraulic cement, sand, gravel and water. gravel and sand compose 60 to 70 percent of concrete. these aggregates support compression force of concrete. cement paste acts as glue to stick grain together. in bushehr factories producing aggregates do not operate according to astm standards, so that fineness modulus (fm) of the produced sands ...
one of the most commonly used techniques to reduce the corrosion rate of rebar in concrete is addition substances named corrosion inhibitors into the concrete. corrosion inhibitor is chemical compounds that were added to concrete to prevent corrosion of steel in concrete. sodium nitrate is a type of anodic inhibitors that this study investigatesthe effect of this inhibitor on the properties of ...
the objective of this study was to consider economic consequence of delayed conception of milking cows in large dairy farms in iran. optimum open days and milk production at peak were assumed to be 110 days and 45 kg respectively. price of milk, feed, semen and hormones were calculated based on average prices of autumn, 2013. results of this study showed that increasing days in milk (dim) from ...
Abstract Background and purpose: The aim of this study was to compare closed and open hemorrhoidectomy techniques, regarding postoperative signs, symptoms, and complications, and long-term results. Materials and methods: This was a randomized clinical trial conducted on 100 patients with third-or fourth-degree hemorrhoids suitable for hemorrhoidectomy. Group A contained 50 patients whom und...
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