a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...

most of the verbal constructions of harzani dialect have got inflectional affixes. the majority of the constructions are made up vy adding a specific verbal affix to the verbal stem (infinitive without infinitive marker). only a few number of them is formed by adding a verbal affix to the past participle of the verb. there are specific rules for the formation of different verbal types. there is...

attempts have been made to study the thermodynamic behavior of 1,3 butadiene purification columns with the aim of retrofitting those columns to more energy efficient separation schemes. 1,3 butadiene is purified in two columns in series through being separated from methyl acetylene and 1,2 butadiene in the first and second column respectively. comparisons have been made among different therm...

abstract this study is carried out to determine the chemical composition in the three vegetative stages of the haloxylon sp., degradation parameters, with adding naoh and ca(oh2 ). for this purpose, in may and october and january 2010 enough some haloxylon sp. of the ammary area was prepared. crude protein and ash percentage are decrease, neutral detergent fiber percentage with pragress stage ...

according to research, academic self-concept and academic achievement are mutually interdependent. in the present study, the aim was to determine the relationship between the academic self-concept and the academic achievement of students in english as a foreign language and general subjects. the participants were 320 students studying in 4th grade of high school in three cities of noor, nowshah...

the present research was conducted to explore the effect of employing two language teaching approaches, i.e. schema-based instruction (sbi) and translation-based instruction (tbi), on vocabulary knowledge, structure and reading comprehension ability of forty one female students learning english in grade one senior high school in rivash, kuhsorkh, iran. while sbi focuses on schemata, i.e. words ...

the construct of self-efficacy has received increasing attention in research over the past two decades. many studies have been carried out 1.3 significance of the study this study has pedagogical implications since improving students’ self- efficacy and autonomy is important for promoting actual performance on classroom academic tasks. in academic settings, it has been shown that self-effi...

این کتاب شامل یازده فصل می باشد که سه فصل آن که حدوداً 83 صفحه می باشد، ترجمه شده است. در فصل اول بحثی در مورد خدا آغاز می شود و این بحث تا فصل سوم ادامه دارد و هر یک از نمایندگان سه دین یهودیت، مسیحیت و اسلام خدای خود را معرفی و اوصاف و ویژگیهای او را بازگو می کنند. در فصل اول فرد یهودی در مورد واقعیت مدرن ایمان یهودی و عمل و روابط بعنوان کلیدهایی برای ایمان، کسب معرفت به خدا از طریق وحی و دع...

Background & Aim: Dysmenorrhea is a common problem in young women. Although dysmenorrhea is not life threatening, it can have adverse effects on quality of life. Various treatments are offered for dysmenorrhea including vitamin E supplements. This study investigated the effect of vitamin E on primary dysmenorrhea. Methods & Materials: In this before-after clinical trial, 200 female students wh...