نتایج جستجو برای: fetri hindrances and resist anti
تعداد نتایج: 16887680 فیلتر نتایج به سال:
The purpose of this study was to examine perceived hindrances encountered by sport coaches in the Gauteng Province of South Africa. A total of 224 sport coaches (122 males and 102 females) were purposively recruited to participate in this study. An exploratory factor analysis was used to assess the factor structure of the Perceived Hindrance Scale. The results of this study indicated the follow...
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...
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...
A series of perylenetetracarboxylic diimides (PDIs) dimers with slipped “face-to-face” stacked structure and different substituents at the bay positions have been synthesized and the molecular structures are characterized by 1H NMR, MALDI-TOF and elemental analysis. And different substituents at the bay positions of the PDI ring bring about various steric hindrances. These different steric hind...
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