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تعداد نتایج: 4487750 فیلتر نتایج به سال:
A Cocrystallization is an attractive molecular engineering approach for realizing improved energetic materials (explosives, propellants, and pyrotechnics). When two or more neutral species are combined to form a new structure, cocrystalline materials are created with distinct solid-state properties. As the performance criteria of energetic materials (explosive power, thermal stability, and phys...
انسداد حاد سیستم ادراری یکی از علل شایع مراجعه بیماران به کلینیک ارولوژی می باشد. انسداد سیستم ادراری توسط اروگرافی ترشحی و سی تی اسکن (که دارای عوارض ناشی از اشعه یونیزا و عوارض مواد حاجب می باشند)، mri و مواد رادیونوکلئید (که دارای هزینه بالا و صرف وقت زیاد می باشند.) و نیز روشهای تهاجمی نظیر پیلوگرافی آنته گرید و رتروگرید بررسی می گردد. سونوگرافی روشی غیر تهاجمی در بررسی انسادا سیستم ادراری ...
In this study, first,diffusible hydrogen of cellulosic electrode E8010-P1 and low hydrogen electrode E8018-G was measured by mercury displacement method according to ISO3690. Then,the effect of preheating and post-heating on the sensitivity to hydrogen inducedcold cracking in welding of 18mm API5L X70 steel with these electrodes was investigated according to ISO17642-2. The results of visual in...
the toxicity of 7 herbicides to the three cyanobacteria was tested in this work. the results indicated that: (1) there was a highly significant relationship between dried weight or chlorophyll-a and od680nm for tested cyanobacteria; (2) the toxicity of the tested herbicides with the order from high to low was: photosynthesis-inhibiting > accase inhibitor > protox inhibiting herbicides; (3) the ...
abstract the present study was conducted to examine the effect of proficiency on students interaction while carrying out the grammar-based task(s) in collaboration. in particular, the study examines whether the level of proficiency affects the learners’ focus of attention to grammatical and lexical features. the study takes a further step and examines whether there is any difference in the use...
In this study, first,diffusible hydrogen of cellulosic electrode E8010-P1 and low hydrogen electrode E8018-G was measured by mercury displacement method according to ISO3690. Then,the effect of preheating and post-heating on the sensitivity to hydrogen inducedcold cracking in welding of 18mm API5L X70 steel with these electrodes was investigated according to ISO17642-2. The results of visual in...
conclusions in type ii diabetes, the increased susceptibility of ldl to oxidation is related to hyperglycemia and low aop. background type ii diabetes mellitus is a complex heterogeneous group of metabolic conditions characterized by an increased level of blood glucose, due to impairment in insulin action and/or insulin secretion. hyperglycemia is a major factor in the pathogenesis of atheroscl...
abstract solitary pulmonary nodule (spn) is explained as a separate, well-determined obscurity with the maximum size of 3cm which is enclosed by typical lung tissue and is not related to any other anomalies in the lung or adjacent lymph nodes. among imaging modalities mri has more benefits such as high spatial resolution and usage of nonionizing radiation, however, the efficacy of this imaging ...
conclusions the predictive value of the two statistically significant red flags only marginally raises the clinical suspicion of spinal cord or cauda equina compression. effective risk stratification of patients presenting to the ed with acute back pain is crucial; however, this study did not support the use of these red flags in their current form. patients and methods it was a retrospective c...
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