پاراتوبرکولوزیس یک نوع التهاب گرانولوماتوز مزمن و پیشرونده غیر قابل درمان روده می باشد که توسط مایکوباکتریوم ایویوم زیرگونه پاراتوبرکولوزیس (mycobacterium avium subsp. paratuberculosis map) ایجاد می گردد. پاراتوبرکولوزیس در تمام جهان در میان نشخوارکنندگان دیده می شود. نخستین گزارشات پاراتوبرکولوزیس در ایران به دهه 1960 میلادی باز می گردد زمانی که بیماری در میان دام های وارداتی گاوداری شرکت نفت ...

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 ...

most specialists in the field of foreign language teachingconsiderreading skill as an interactive process between the reader’s prior knowledge and the text.accordingly, the activation of prior knowledge for an effective comprehension is very important. it is generally agreed that the pre-reading phase is the stage where this type of interaction and activation may be enhanced throughcertain stra...

as far as bandura’s (1977) conceptualization of the sense of self-efficacy is concerned, it is argued to be context- and even task-specific, compared to other concepts like self-esteem (brown, 2000); therefore, upon the previous research studies, related theories and definitions, and the ideas and views obtained from the interviews conducted with the scholars, the current research study aimed a...

in new management approaches, in the organizations with inflexible structure, existing of red tapes and interruptions caused by limitations and also non-compliance with environmental changes, create demotivation among staff. with regard to the influence of job motivational potential and its relationship to the type of organizational structure( enabling and dissuasive), the goal of this research...