نتایج جستجو برای: presentation
تعداد نتایج: 162803 فیلتر نتایج به سال:
this experimental study has been conducted to test the effect of oral presentation on the development of l2 learners grammar. but this oral presentation is not merely a deductive instruction of grammatical points, in this presentation two hypotheses of krashen (input and low filter hypotheses), stevicks viewpoints on grammar explanation and correction and widdowsons opinion on limited use of l1...
abstract poor reading comprehension can result in failure in using references, benefiting from professional gatherings and resources, keeping up with the growing body of knowledge in the virtual world of the internet, and failing to achieve in efl programs. the purpose of the present quasi-experimental study was to explore the effects of background knowledge and previewing narrative and expos...
within communicative, interactive, and learner-centered framework of language teaching and learning, students need to learn four skills of listening, speaking, reading, and writing for their educational success. but of all the language skills, reading enjoys a paramount significance in so many second or foreign language academic contexts. in spite of its importance, language learners still have...
abstract this study set out to compare the effect of modality of presentation (subtitled vs. auditory) in the comprehension of verbal content of documentary films among iranian efl students. to this end, (30 male 30 female) students were chosen from two schools. after their homogeneity was established, the students attended the listening sessions to watch five documentary films over t...
differentiation is an epigenetic process which is installed by changes of transcriptional programs over successive cellular divisions. a number of studies have reported the effects of biochemical modifications of chromatin (dna and chromatin proteins) on the regulation of transcription. although, these studies are able to explain how transcription of a given gene is regulated (toward activation...
background degenerative retinal diseases, including age related macular degeneration, glaucoma, and hereditary retinal dystrophies are major causes of blindness. the principal defect in these diseases is cell loss which is amenable to both cell based neuroprotective and neuroregenerative therapies. to briefly review the lines of research and potential candidates for cell based therapies among r...
elucidating the critical epigenetics events involved in differentiation and reprogramming of cells to primordial germ cells (pgcs) is among the interesting issues in stem cell research. here, i will talk about critical transcription factors and global hypomethylation in development of germ cells. evidence strongly suggests that the earliest pgcs emerging in the e7.25 mouse embryo epiblast have ...
backgrounds: a straight-forward way to identify whether a drug or environmental chemical can be harmful to unborn baby is to evaluate its effect on laboratory animals. all invivo methods need large number of animal and are therefore time consuming and expensive. however, the thousands of chemicals in need of testing, to reduce the spending of live animals, an assortment of in vitro assays has b...
the introduction and evolution of hematopoietic stem cell transplantation (hsct) could be traced back to 1950s, to the studies on interactions among irradiation, covering spleen and bone marrow from it and injection of bone marrow cells. today, hsct is considered a well-established, effective and promising means of therapy for various malignant and non-malignant medical conditions, both in chil...
background: renal transplantation is the best choose in the end stage renal disease (esrd), and acute rejection and graft dysfunction remain major challenges in the worldwide, even with the advent of new immunosuppressive drugs. the novel cell-based anti-rejection treatments have been studied by using different stem cell sources. in this study, transplantation of autologous-bone-marrow-derived...
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