production of the asphalt mixture usually involves mixing the stone grains of various kinds with bitumen as a binder. bitumen can be further modified or enriched with various additives such as polymers or recycled rubber from used tires in order to optimize its properties for a given purpose. asphalt mixtures...
in the form of pellets. carbothermal reduction of silica was investigated in a fixed bed reactor at °c in nitrogen at - atm pressure and in hydrogen-nitrogen mixtures at atmospheric pressure. the extent of reduction (xsio ) of silica was defined as the fraction of oxygen removed from sio by the reduction...
chemicals chemicals are substances formed by chemical union of two or more elements or ingredients in definite proportion by weight. they are produced by or used in a reaction involving changes in atoms or molecules. generally, "chemicals" refers to a much wider class of substances that includes many mixtures...
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publications microbiological hazards files register of marketing authorisation decisions and assessment conclusions - biocides products register of marketing authorisation decisions and assessment conclusions list of leaflets published in english the agency's regular publications in english events chemical mixtures...