نتایج جستجو برای: mossbauer effect
تعداد نتایج: 1641882 فیلتر نتایج به سال:
Ultrafine particles of SrFelzOts have been synthesized by citrate precursor technique. Solid state reactivity studies of citrate precursor lead to the formation oEfine particles of SrFe12019below 823K.Th.e size and m o r p h o l o g y o c e area measured by BETmethod for5.2nm clystallite is found to be27.45 m2fg. havingparticlesize42nm. UltrafinepaniclesofSrFe~zOlpshows interesting magnetic pro...
The influence of different carbon sources, including anthracite, calcined petroleum coke, three samples high-temperature biochar, and a mixture 50 wt.% biochar on slag foaming behavior was studied. slag’s composition set to FeO-CaO-Al2O3-MgO-SiO2, the temperature for 1600 °C. effect sources evaluated using characteristics (foam height, foam volume, relative gas fraction), X-ray diffraction (XRD...
current studies in second language (l2) learning have revealed the positive role of corrective feedback (cf) in both oral and written forms in different language features. the present study was an attempt to investigate the effect of both direct and indirect written corrective feedback (wcf) on the use of grammatical collocations in l2 writing. the study also sought to examine whether the effec...
the aim of this study has been to find answers for the following questions: 1. what is the effect of immediate correction on students pronunciation errors? 2. what would be the effect of teaching the more rgular patterns of english pronunciation? 3. is there any significant difference between the two methods of dealing with pronuciation errore, i. e., correction and the teaching of the regular ...
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