نتایج جستجو برای: free xerogel
تعداد نتایج: 514214 فیلتر نتایج به سال:
One distinct concentration of copper ions was embedded into the silica matrix to xerogel form using copper source Cu(NO3)2∙3H2O. The xerogel samples were prepared with using hydrolysis and condensation reactions of TetraEthyl Ortho-Silicate (TEOS) by the sol-gel method. In this investigation, new molar ratio of H2</su...
Research on the properties and applications of molecules doped into sol-gel-derived silica matrices has expanded rapidly. This Account begins with a brief review of the use of the dopant molecules as probes of the changes that occur as the system evolves from the initial sol to the final xerogel during the formation of monoliths, thin films, and mesostructured films. Methods of deliberately pla...
in this thesis, first the notion of weak mutual associativity (w.m.a.) and the necessary and sufficient condition for a $(l,gamma)$-associated hypersemigroup $(h, ast)$ derived from some family of $lesssim$-preordered semigroups to be a hypergroup, are given. second, by proving the fact that the concrete categories, semihypergroups and hypergroups have not free objects we will introduce t...
An improved method for the production of biogenic silica from cornhusk using sol–gel polymeric route
Abstract Porous silica was synthesized from cornhusk using the sol–gel polymeric route and compared with ash obtained direct combustion process under laboratory conditions. The unmodified dissolved in NaOH for 1 h to form sodium silicate, which subsequently hydrolyzed citric acid yield a xerogel. xerogel characterized inductively coupled plasma–optical emission spectrometry (ICP-OES), Fourier t...
The methanol leaf extract of Aspila africana formulated as gels was studied for its potency on experimentally-induced wound in rats. Wounds were inflicted on Wistar rats using excision model. The extract was formulated as hydrogel and xerogel. The wound healing effects of the formulations were compared to that of a standard antibiotic, Cicatrin together with the gel bases. In all cases, there w...
The synthesis and self-assembly of two new phenylacetylene macrocycle (PAM) organogelators were performed. Polar 2-hydroxyethoxy side chains were incorporated in the inner part of the macrocycles to modify the assembly mode in the gel state. With this modification, it was possible to increase the reactivity of the macrocycles in the xerogel state to form polydiacetylenes (PDAs), leading to a si...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید