منابع مشابه
effect of oral presentation on development of l2 learners grammar
this experimental study has been conducted to test the effect of oral presentation on the development of l2 learners grammar. but this oral presentation is not merely a deductive instruction of grammatical points, in this presentation two hypotheses of krashen (input and low filter hypotheses), stevicks viewpoints on grammar explanation and correction and widdowsons opinion on limited use of l1...
15 صفحه اولRadiation Effect in Silica Optical Fiber Exposed to Intense Mixed Neutron–Gamma Radiation Field
We measured in situ the radiation-induced absorption of pure silica core fibers exposed to a fission nuclear reactor. We observed the growth of the 1.39m OH vibration band in polymer coated fiber. Three mechanisms are responsible for this effect: recoil protons, hydrogen diffusion, and a probable compaction effect. Based on this experiment, a fiber-optic neutron monitor prototype is proposed.
متن کاملGamma-Ray Induced Luminescence of Silica Gel II. Luminescence Occurring on Adsorption of Gases: Radiosorptionluminescence
Luminescence observed on adsorption of gases and vapours (RSL) on silica gel previously exposed to y-rays has been investigated. The dependence of RSL intensity on absorbed radiation dose and degassing temperature of the gel prior to irradiation parallels the dependence of radiothermoluminescence (RTL) intensity: A limiting value is reached around 1 Mrad and the intensity increases steeply on r...
متن کاملthe effect of explicit teaching of metacognitive vocabulary learning strategies on recall and retention of idioms
چکیده ندارد.
15 صفحه اولSynthesis of oligodeoxyribonucleotides on silica gel support.
A rapid solid phase method of oligonucleotide synthesis based on monomeric protected nucleosides has been developed.
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ژورنال
عنوان ژورنال: Journal of Nuclear Science and Technology
سال: 1975
ISSN: 0022-3131,1881-1248
DOI: 10.1080/18811248.1975.9733086