انتخاب حیوان بر اساس نشانگرهای مولکولی یکی از جدید ترین روش­های اصلاحی است که می تواند باعث بهبود صحت پیش­بینی و پاسخ به انتخاب شود. در این آزمایش ژن­های کاندیدای کالپاستاتین و آنتی ژن­های لنفوسیتی گاوی (bola-drb3) در گاوهای نژاد سیستانی با استفاده از روش pcr-rflp بررسی شدند. ژن کالپاستاتین در بررسی راندمان رشد و کیفیت گوشت به­عنوان یکی از ژن­های کاندیدا شناخته شده است و از ژن drb3 به­عنوان یک ...

in this study, scour of mashkid bridge pier located in mashkid river of saravan county has been studied and to measure the scour rate, the numerical model hec-ras 4.0 has been used. upon selection of mashkid river as the case study and whereas the studied zone is important with respect to the climatic conditions and showery monsoon raining and flowing the great and destructive floodwaters, ther...

با توجه به اهمیت حفظ تنوع در نژادهای بومی و شناسایی ذخایر ژنتیکی کشور، تنوع ژنتیکی جمعیت گاومیش­ آذری با استفاده از ده نشانگر ریزماهواره­ای (BoLA-DRB3، BM1818، BM1824، CSSM033، CSSM047، ILSTS017، ILSTS033، ILSTS058، ILSTS061 و ILSTS089) بررسی شد. شمار 70 نمونه مو از گاومیش­های آذری در سه منطقۀ شمال­غربی کشور (استان­های اردبیل، آذربایجان­شرقی و آذربایجان­غربی) گردآوری شد. استخراج DNA ژنگانی (ژنو...

the present research was conducted to accomplish two purposes. firstly, it aimed to explore and describe schematic structure or what halliday and hassan (1989, p.64) have called “generic structure potential” (gsp) of american english, iranian persian and iranian english newspaper editorials within systemic functional linguistics. secondly, a quantitative cross-comparison was made to investigate...

abstractof two mcall programs introducing 100 vocabulary items through two im the researcher of the present study was intrigued to compare the effects age modalities (pictures and streaming video) with those of a conventional method (teacher instruction) in an efl context. she set out to investigate whether such multimedia environments could provide a more effective environment for vocabulary...

abstract deviation or in other words committing a crime is literally a social problem. this research that was conducted in 1389 and 1390 has tried to investigate the causes of crimes committed by young male inmates qazvin central prison and effective variables on their tendency to deviation. accordingly after collecting theoretical framework and offering theoretical model including both hirsch...

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

abstract: the present study was undertaken to investigate whether 1) there is any significant correlation between iranian efl/eap learners’ l2 writing proficiency and their willingness to communicate, 2) there is any significant difference between efl and eap learners in terms of willingness to communicate, 3) there is any significant difference in wtc of iranian efl/eap learners with 1- nati...

during the process of reading, sometimes learners use ineffective and inefficient strategies and some factors may influence their use of strategies. perhaps critical thinking is one of these factors. this study aims to identify those categories of reading strategies that are mostly used by iranian efl learners and to see if there is any significant relationship between the critical thinking abi...