منابع مشابه
the underlying structure of language proficiency and the proficiency level
هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...
15 صفحه اولformation and evolution of regional organizations: the case study of the economic cooperation organization (eco)
abstract because of the many geopolitical, geo economical and geo strategically potentials and communicational capabilities of eco region, members can expand the convergence and the integration in base of this organization that have important impact on members development and expanding peace in international and regional level. based on quality analyzing of library findings and experts interv...
15 صفحه اولGene Family: Structure, Organization and Evolution
Gene families are considered as groups of homologous genes which they share very similar sequences and they may have identical functions. Members of gene families may be found in tandem repeats or interspersed through the genome. These sequences are copies of the ancestral genes which have underwent changes. The multiple copies of each gene in a family were constructed based on gene duplicati...
متن کاملThe structure of human immunoglobulins.
General structural features of human Ig proteins are reviewed. The basic four-chain polypeptide structure is described with particular emphasis on IgG as a model for all Ig classes. The dual biologic role of antibody with antigen-binding and the Fc-associated class-specific effector functions is discussed. Certain aspects of Ig structure are highlighted in order to facilitate understanding of s...
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1. Lu R, Zhao X, Li J, et al (2020) Genomic characterisation and epidemiology of 2019 novel coronavirus: implications for virus origins and receptor binding. Lancet 395:565–574 2. Zhou P, Tachedjian M, Wynne JW, et al (2016) Contraction of the type i IFN locus and unusual constitutive expression of IFN-α in bats. Proc Natl Acad Sci U S A 113:2696–2701 . doi: 10.1073/pnas.1518240113 3. Wu A, P...
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ژورنال
عنوان ژورنال: Progress in Biophysics and Molecular Biology
سال: 1970
ISSN: 0079-6107
DOI: 10.1016/0079-6107(70)90026-x