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5 giorni fa · combustion, a chemical reaction between substances, usually including oxygen and usually accompanied by the generation of heat and light in the form of flame. The rate or speed at which the reactants combine is high, in part because of the nature of the chemical reaction itself and in part because more energy is generated than can ...
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1 giorno fa · Abstract The synergy phenomenon is known as a nonadditive effect of various additives on the reaction. This effect was earlier used mainly in liquid-phase reactions and was explained by the reactions of active impurities with each other or with the products of their transformations. The present study shows that synergism also takes place if one of the additives is an inert gas. At the self ...
5 giorni fa · Alex Karp is cofounder and CEO of data mining firm Palantir Technologies, which received early backing from CIA investment arm In-Q-Tel. The company does contract work for government agencies like ...
3 giorni fa · Mechanism of action. Hydroxycarbamide decreases the production of deoxyribonucleotides via inhibition of the enzyme ribonucleotide reductase by scavenging tyrosyl free radicals as they are involved in the reduction of nucleoside diphosphates (NDPs).
1 giorno fa · Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun. It is also produced by electric arcs, Cherenkov radiation, and ...
