منابع مشابه
the effects of keyword and context methods on pronunciation and receptive/ productive vocabulary of low-intermediate iranian efl learners: short-term and long-term memory in focus
از گذشته تا کنون، تحقیقات بسیاری صورت گرفته است که همگی به گونه ای بر مثمر ثمر بودن استفاده از استراتژی های یادگیری لغت در یک زبان بیگانه اذعان داشته اند. این تحقیق به بررسی تاثیر دو روش مختلف آموزش واژگان انگلیسی (کلیدی و بافتی) بر تلفظ و دانش لغوی فراگیران ایرانی زیر متوسط زبان انگلیسی و بر ماندگاری آن در حافظه می پردازد. به این منظور، تعداد شصت نفر از زبان آموزان ایرانی هشت تا چهارده ساله با...
15 صفحه اولpropagation of human germ stem cells in long-term culture
background: spermatogonial stem cells (sscs), a subset of undifferentiated type a spermatogonia, are the foundation of complex process of spermatogenesis and could be propagated in vitro culture conditions for long time for germ cell transplantation and fertility preservation. objective: the aim of this study was in vitro propagation of human spermatogonial stem cells (sscs) and improvement of ...
متن کاملIsolation and long-term culture of neural stem cells from chondrostei fish Acipenser persicus
In the present study, an in vitro brain cell culture was developed from Persian sturgeon (Acipenser persicus). The tissues from anterior, middle and posterior regions of the brain were dissected, dispersed and cultivated separately in DMEM/F12 medium supplemented with 15% fetal bovine serum, antibiotic and antimycotic. The medium was changed every 3 days. The cells became confluent after about ...
متن کاملTaking Memory Tests Improves Long-Term Retention
Taking a memory test not only assesses what one knows, but also enhances later retention, a phenomenon known as the testing effect. We studied this effect with educationally relevant materials and investigated whether testing facilitates learning only because tests offer an opportunity to restudy material. In two experiments, students studied prose passages and took one or three immediate free-...
متن کاملIsolation and long-term culture of neural stem cells from Acipenser persicus (Borodin, 1897)
In the present study, an in vitro brain cell culture was developed from neural cells of Persian sturgeon (Acipenser persicus). The tissue samples collected from the anterior, middle and posterior regions of the brain were cultivated separately in DMEM/F12 medium supplemented with 15% fetal bovine serum, antibiotic and antimycotic. The medium was refreshed every 3 days. The cells became confluen...
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ژورنال
عنوان ژورنال: ECS Proceedings Volumes
سال: 2003
ISSN: 0161-6374,2576-1579
DOI: 10.1149/200307.1158pv