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surface chemistry

(Encyclopedia)surface chemistry, study of chemical reactions in which the reactants are first adsorbed onto a surface medium (see adsorption) that then acts as a catalyst for the reaction; after the reaction the pr...

organometallic chemistry

(Encyclopedia)organometallic chemistry, the reactions and use of a class of compounds (R-M) that contain a covalent bond between carbon and metal. They are prepared either by direct reaction of the metal with an or...

flerovium

(Encyclopedia)flerovium, artificially produced radioactive chemical element; symbol Fl; at. no. 114; mass number of most stable isotope 289; m.p., b.p., sp. gr., and valence unknown. Situated in Group 14 of the per...

International Monetary Fund

(Encyclopedia)International Monetary Fund (IMF), specialized agency of the United Nations, established in 1945. It was planned at the Bretton Woods Conference (1944), and its headquarters are in Washington, D.C. Th...

sol, in chemistry

(Encyclopedia)sol, in chemistry: see colloid.

labor union

(Encyclopedia)labor union: see union, labor.

trade union

(Encyclopedia)trade union: see union, labor.

company union

(Encyclopedia)company union: see union, labor. ...

African Union

(Encyclopedia)African Union (AU), international organization established in 2002 by the nations of the former Organization of African Unity (OAU). The AU is the successor organization to the OAU, with greater power...

resonance, in chemistry

(Encyclopedia)resonance, in chemistry: see chemical bond. ...