the present study aimed at exploring cognitions of iranian english teachers within the context of english for academic purposes (eap). to this end, the cognitions of two groups of eap teachers with respect to their pedagogical content knowledge (pck) and their sense of professional identity (pi) were probed. two language teachers and two content instructors who had at least five years of eap te...

in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...

this is an original study on the effect of a polyisobutylene – polydimethylsiloxane (pibpdms) block copolymer modifier used as an interfacial active agent on the dynamics behaviour of single newtonian drops suspended in a polyisobutylene (pib) newtonian matrix. the results were divided in two sections. the first part included the experiments carried out on the non-modified and 2% block cop...

asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...

در کار پژوهشی حاضر، امکان استفاده از تجمعات مایسل معکوس دکانوئیک اسید /thf برای استخراج و پیش تغلیظ مقادیر بسیار کم یون های ag و (iii) as در نمونه های حقیقی و اندازه گیری آن ها به روش اسپکترومتری جذب اتمی الکتروترمال مورد بررسی قرار گرفت. جهت استخراج یون هایag و as و تبدیل آن ها به گونه های مناسب به ترتیب از لیگند های دی تیزون و o,oدی اتیل دی تیو فسفات استفاده شده است. برای استخراج، ابتدا مق...

this study was designed to investigate the impacts of teachers self-disclosure on students foreign language classroom anxiety, attitude to english language learning and their achievement scores at the end of the term. there were 48 female learners of intermediate level. they were not randomly selected. there were one experimental group with 21 students and one control group with 27 students.the...

در این پژوهش سعی گردیده تا خصوصیات فیتوشیمیایی و فاکتورهای تغذیه ای سه گونه درمنه دشتی artemisia sieberi besser (as)، درمنه بیابانیartemisia deserti krasch (ad) و درمنه کوهی artemisia aucheri (aa) از خانواده آستراسه مورد بررسی قرار گیرد. در تیرماه سال 1392، دو گونه درمنه دشتی و کوهی از بیرجند و گیاه درمنه بیابانی از قاین جمع آوری گشته و آماده سازی گردید. برای بررسی ترکیبات فنولی کل، تانن ها و ف...

abstract:‎ literature is said beautiful words of poetry or prose that excites reader’s or listener’s feel. certainly, to ‎be effective, such a text should have certain characteristics. the four elements of the literature: thought, ‎imagination, emotion and style make a text to be literary and effective. emotion and imagination are ‎specific elements of literary texts, while thought and style a...

in the past couple of decades sociocultural theory of sla and its implications in efl contexts have attracted attentions of research circles worldwide and aroused some controversies. firth and wagner (1997) have questioned the principles of the cognitive view which gives importance to mental constructs in favor of sociocultural view which highlights social and contextual constructs. but if soci...