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 Usos. The Usos are a Samoan American professional wrestling tag team consisting of twin brothers Jey Uso and Jimmy Uso (born August 22, 1985). They are assigned to the SmackDown brand where they are the brand's current Tag Team Champions in their 3rd overall reign and 1st Smackdown reign having held the WWE Tag Team Championship twice).