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The present study reports the synthesis of N-doped TiO2 photocatalyst for the degradation of caffeine using mechanochemical grinding method from the mixture of titania/urea followed by calcination at 400 ⁰C. The phase composition, particle size, surface area, morphology and optical properties...
teachers’ beliefs greatly influence their performance in the classroom, their choice of instructional strategies, their way of controlling the class, their dealing with the students, and their general goals and objectives. one of these beliefs is teachers’ sense of efficacy which is viewed as an important construct and has shown to be positively correlated with students’ achievement (ross, 1992...
In this paper, we present some fixed point theorems for single valued mappings on $K$-complete, $M$-complete and Symth complete quasi metric spaces. Here, for contractive condition, we consider some altering distance functions together with functions belonging to $C$-class and $A$-class. At the same time, we will consider two different type $M$ functions in contractive conditions because the qu...
statement of problem: due to the appearance of palatal height difference in orthodontic patients we decided to carry out this study. purpose: the purpose of this research was to determine palatal height in persons with normal occlusion and different malocclusions (class i, ii div i and iii) and comparing them with each other. materials and methods: in this cross sectional research, 240 subjects...
One of the goals of all pharmacological interventions aimed to increase the survival rateof patients with alcohol-dependent oropharyngeal cancers is to decrease alcohol use. Oxytocinis an alternative therapy for craving and alcohol management. However, the effectiveness ofoxytocin on the severity of alcohol dependence has not been evaluated. In an ABAB...
results of different studies demonstrate that the world-class organizations have better performance in encountering challenges of twenty-first century. therefore developing such features is strongly recommended to iranian firms. most of experts believe that to achieve to world-class situation, the most important factor is marketing, and all organizations should assess themselves about world-cla...
New extension of nanoparticles used in the last two decades and hence, entrance of them to industrialand non-industrial sewage necessitate study of probable effects of these materials in aquatic ecosystems.This research was performed in order to determine the toxicity effect of silica dioxide (SiO2</spa...
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