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In this study, a new graphene ceramic composite (GCC) was prepared based on the reduced grapheneoxide (rGO) doped in sol-gel derived silica. The GCC was prepared by dispersing rGO nanosheets intothe sol-gel precursors containing methyl triethoxysilane, methanol and hydrochloric acid solution.During an acid catalyzed hydrolyze reaction and gelation proc...
Seawater ultrafi ltration (UF) as a pretreatment of reverse osmosis (RO) process in a thermal power plant was investigated using a 100 kDa hollow fi ber membrane. The choice of the UF physical backwash conditions remains arbitrary or ensuing from a sensibility study. As the optimum must take into account the factors interactions, we led a response surface study to analy...
یکی از کارکردهای نهاد خانوادهتولید مثل است و از آنجا که بقای نوع بشر در گرو آن بوده و این مسأله موجب قوامخانواده نیز می‌گ...
This quantitative study investigated the relationship between class size and student outcomes (final grades DFW rates) in online higher education courses offered by a large, 4 year public institution United States. The following cut-off points were used: 8-15 vs. 16 or more students, 8-30 31 8-40 41 8-50 51 students. Course level data included average final rates for 391 undergraduate taught du...
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