منابع مشابه
critical period effects in foreign language learning:the influence of maturational state on the acquisition of reading,writing, and grammar in english as a foreign language
since the 1960s the age effects on learning both first and second language have been explored by many linguists and applied linguists (e.g lennerberg, 1967; schachter, 1996; long, 1990) and the existence of critical period for language acquisition was found to be a common ground of all these studies. in spite of some common findings, some issues about the impacts of age on acquiring a second or...
15 صفحه اولCitric Acid as a Root Surface Biomodification Agent: an Update
1 attachment, which is lost during disease. This type of regeneration is described by the term 'New attachment'. New attachment is the embedding of new periodontal ligament fibres on to new cementum previously denuded by the periodontal disease. Factors interfering with new attachment are plaque, calculus, infected cementum and alterations in mineral density and composition of root. These obsta...
متن کاملMechanisms of Material Removal in the Cmp Process
The Chemical Mechanical Polishing (CMP) process is now widely employed in the manufacture of Ultra-Large-Scale Integrated (ULSI) circuits. Yet, the effects of various process parameters on the material removal rate (MRR) and the resulting surface topography are not well understood. In this chapter, accordingly, several polishing models are reviewed with emphasis on the mechanical aspects of CMP...
متن کاملEffect of citric acid chelating agent on morphology of ZnO particles prepared by hydrothermal method
Abstract Zinc oxide is one of the most widely used and important materials in today's science and industry. In this study, ZnO nanoparticles were synthesized by hydrothermal method. Zinc acetate, citric acid and deionized water was respectively used as a source of zinc ion, solvent and chelating agent. In this study, the effect of citric acid concentration as an additive was studied on morphol...
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ژورنال
عنوان ژورنال: Journal of the Korean Institute of Electrical and Electronic Material Engineers
سال: 2006
ISSN: 1226-7945
DOI: 10.4313/jkem.2006.19.10.889