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.
The United Service Organizations Inc. (USO Show) is a nonprofit organization that provides programs, services and live entertainment to United States service members and their families.
The United States dollar (sign : $ ; code: USD; also abbreviated US$ and referred to as the dollar, U.S. dollar, US dollar or American dollar) is the official currency of the United States and its overseas territories. It is a Federal Reserve Note and consists of 100 smaller cent units.