نتایج جستجو برای: surface treatment
تعداد نتایج: 1980818 فیلتر نتایج به سال:
The paper describes the modification conducted for PAN carbon fiber surfaces in solutions of nitric and sulphuric acids. authors studied impact parameters such as temperature, acid concentration, time ratio nitrosulphuric on occurrence reactive groups surface. revealed presence carboxylic ketone range 1663-1798 1568 cm -1 IR spectra fibers. use did not identify sulfur-containing functional spec...
Background and purpose: Water treatment is of great importance in human life, due to the contamination of water resources. Therefore, continuous evaluation of the performance of water treatment plants is necessary to minimize contamination within the treatment plant in order to create optimal conditions. Materials and methods: A cross-sectional descriptive analytic study was performed in Te...
Background and Objectives: Cold plasma is an eco-friendly and non-thermal technique, which has become an important technology to change the physical and chemical features of polymers. Recently, cold plasma has been considered in the decontamination and modification of packaging materials in the food industry. Therefore, the objective of this study was to survey the effect of using low-pressure ...
تاثیر آموزش تفکر انتقادی به شیوه مباحثه بر روی مهارت درک متن یادگیرندگان انگلیسی به عنوان زبان خارجی
the purpose of the present study was to investigate the effect of instruction through debate on male and female efl learners’ reading comprehension, to examine the differences between the performance of male and female participants on the five dimensions of cctst including analysis, evaluation, inference, deductive reasoning, and inductive reasoning, and to examine the differences between male ...
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