plagiarism in esl/efl learning contexts has been established as a dynamic and multi-layered phenomenon and has become a topic engaging many researchers in a heated debate in recent years. comparisons of student-generated texts with their source texts have shown that students rely on source texts in their writings and copying is a major strategy used by both l1 and l2 writers. in our country a...

the space now known as complete erdos space ec was introduced by paul erdos in 1940 as the closed subspace of the hilbert space ?2 consisting of all vectors such that every coordinate is in the convergent sequence {0} ? { 1 n : n ? n}. in a solution to a problem posed by lex g. oversteegen we present simple and useful topological characterizations of ec. as an application we determine the ...

fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...

سلول های rpe جداسازی شده از کره های چشم اجساد انسانی در سنین جنینی تا نوزادی که بیش از ?? ساعت از زمان مرگ آنها نگذشته بود از بانک چشم جمهوری اسلامی ایران تهیه شد و در محیط dmem/f12 غنی شده با %10 سرم جنین گوساله (fbs ) کشت شدند. در پاساژهای مشخص سلول ها تحت تاثیر محیط حاوی غلظت های مختلف anti-ctgf و avastin( anti-vegf antibody) قرار گرفته و غلظت های مورد نظر انتخاب و در مرحله پایانی اثر ترکیبی...