The present fMRI study investigates, first, whether learning new arithmetic operations is reflected by changing cerebral activation patterns, and second, whether different learning methods lead to differential modifications of brain activation. In a controlled design, subjects were trained over a week on two new complex arithmetic operations, one operation trained by the application of back-up ...

this study examined naturally-occurring university classroom interactions at iranian universities and provided an analysis of silence patterns as politeness strategies used by male and female students. since empirical studies of silence in classroom settings are scarce, this paper aimed to explain such phenomena using participant interviews, classroom observation and detailed discourse analysis...

There has been increasing recognition of the importance of cellular metabolism and metabolic substrates for the function and differentiation of immune cells. In this study, for the first time to our knowledge, we investigate the metabolic requirements for production of IFN-g by freshly isolated NK cells. Primary murine NK cells mainly use mitochondrial oxidative phosphory-lation at rest and wit...

postconditioning is a simple and safe strategy for cardioprotection and infarct size limitation. our previous study showed that oxytocin (ot) exerts postconditioning effect on ischemic/reperfused isolated rat heart. the aim of this study was to investigate the involvement of ot receptor, mitochondrial atp-sensitive potassium channel (mkatp), nitric oxide (no) and cyclooxygenase (cox) pathways i...

Background: The shoulder joint internal rotation deficit is inter alia the most important risk factors for throwing athletes. Thus, the present study aims at investigating the effect of eight weeks of rotator cuff muscles’ specific exercises on the range of motion, proprioception and the activation time of the selective shoulder muscles in male volleyball players with shoulder joint inter...

Aims Persistence plays a key role in both plant population and community dynamics as it allows withstanding temporarily habitat conditions unsuitable for growth reproduction. Plants can exploit three different strategies to persist situ (building soil seed banks, increasing adult longevity and/or clonal reproduction), the dominance of which might vary along environmental gradients. Yet, their r...