Catalysis, nanoparticles: hydrogen peroxidePhoto courtesy of Dr. David J. Willock, Cardiff Universityin chemistry, the modification of the rate of a chemical reaction, usually an acceleration, by addition of a substance not consumed during the reaction.
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USP â Global Expertise, Trusted Standards, Improved Health The U.S. Pharmacopeial Convention (USP) is a nonprofit scientific organization that improves global health through public standards and related programs that help ensure the quality, safety, and benefit of medicines and foods. USPâs standards are used worldwide.