منابع مشابه
What Makes a Useable New Energetic Material ?
In the last 50 years, very many new energetic compounds have been made as potential ingredients for explosive, propellant and pyrotechnic formulations. Of these compounds very few have come to be used in military munitions. To obtain a better understanding of why this has been the case and to help address the discrepancy, the NATO Insensitive Munitions Information Centre (NIMIC) held a workshop...
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A bimetallic system of Pd/CuF2, catalytic in Pd and stoichiometric in Cu, is very efficient and selective for the coupling of fairly hindered aryl silanes with aryl, anisyl, phenylaldehyde, p-cyanophenyl, p-nitrophenyl, or pyridyl iodides of conventional size. The reaction involves the activation of the silane by Cu(II), followed by disproportionation and transmetalation from the Cu(I)(aryl) to...
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The ability to predictably bond thin pieces of tooth-colored restorative material to teeth and expect excellent long-term esthetic and functional results has created a new arena in the practice of dentistry — that of elective cosmetic treatment. This is not to say that these procedures “appeared overnight”; they did not. However, over the last 20 or so years, the materials and technologies have...
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ژورنال
عنوان ژورنال: Physics
سال: 2020
ISSN: 1943-2879
DOI: 10.1103/physics.13.56