نتایج جستجو برای: s reaction
تعداد نتایج: 1089185 فیلتر نتایج به سال:
1- in a search directed to the reaction of compound)23(the cycloaddition reaction of 1,3- diphenylisobenzofurane)14(with p-benzoquinone)19(,followed by addition of cyclopentadiene was carried out.the specific spacial stracture of its ir,nmr,mass spectra. 2- in another attempt the kinetic stability and behavior of compounds)20(and)23(was studied.the main subject of this study was the highly reve...
msu-s mesoporous catalyst with [sio2]/[al2o3] ratio of 55 was synthesized using tetrapropylammonium hydroxide (tpaoh) as a structure directing agent and hexadecyltrimethylammonium bromide (ctab) as a surfactant. the catalytic activity of the calcined sample was evaluated for the dehydration of methanol to dimethyl ether (dme) in a vertical fixed bed microreactor at a weight hurly space velocity...
Precise manipulation of atomic defects is essential for modulating the intrinsic properties two-dimensional (2D) materials. In this study, sulfur (S) atoms are accurately knocked out in 2D basal plane pure tin disulfide (SnS2). By varying annealing temperatures (250–350°C), SnS2 with different S vacancy concentrations (Vs?SnS2) can be obtained. When annealed at 350°C 5 h, vacancies forms single...
Objectives: Physical activities ameliorate elderly motor and cognitive performance. The aim of this research is to study the effect of sport and physical activity on elderly reaction time and response time. Methods & Materials: The research method is causal-comparative and its statistical population consists of 60 active and non-active old males over 60 years residing at Mahabad city. Reacti...
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