نتایج جستجو برای: aluminosilicates
تعداد نتایج: 371 فیلتر نتایج به سال:
[1] Water played a major role in the formation and alteration of rocks and soils in the Columbia Hills. The extent of alteration ranges from moderate to extensive. Five distinct rock compositional classes were identified; the order for degree of alteration is Watchtower ffi Clovis > Wishstone ffi Peace > Backstay. The rover’s wheels uncovered one unusual soil (Paso Robles) that is the most S-ri...
The most acidic OH groups in silica-aluminas (zeolites, clays, amorphous silica-aluminas) can be made to react selectively with C(6)D(6) to give acidic OD groups; quantification by IR spectroscopy shows that differences in the overall Brønsted acidity of aluminosilicates are dominated by differences in the density of sites of similar acid strength.
Titanium dioxide based powders are regularly used in the development of latent fingerprints on dark surfaces. For analysis of prints on adhesive tapes, the titanium dioxide can be suspended in a surfactant and used in the form of a powder suspension. Commercially available products, whilst having nominally similar composition, show varying levels of effectiveness of print development, with some...
Abstract Micro-mesoporous aluminosilicates based on ZSM-5 zeolite, obtained by a dual template method, as well in the presence of dual-functional (i.e. Gemini-type surfactant), were tested oxidation furfural with hydrogen peroxide. Even substantial changes acidity and porosity catalysts result minor variations selectivity towards desired products. Application synthesized zeolite-based materials...
The possibility of increasing the durability coatings based on lime dry construction mix by introducing an additive containing synthetic aluminosilicates is substantiated. regularities structure formation composite in presence aluminosilicates, which additionally consists a calcium–sodium hydrosilicates and minerals zeolite group, increase amount chemically bound 8.74%, are revealed. X-ray diff...
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