Columbia Encyclopedia

(Encyclopedia) Mauss, Marcel märsĕlˈmōs [key], 1872–1950, French sociologist and anthropologist. Nephew of eminant sociologist Émile Durkheim, Mauss graduated from the Univ. of Bordeaux and the École Pratiqu...

(Encyclopedia) discount, in banking and investment, fee for lending money, which the banker deducts from the loan when it is given. Thus, with a $1,000 loan at a 6% discount, the borrower receives $940 and repays $1...

(Encyclopedia) collateral kəlătˈərəl [key], something of value given or pledged as security for payment of a loan. Collateral consists usually of financial instruments, such as stocks, bonds, and negotiable pap...

(Encyclopedia) hydrogenation hīdrôjˈənāˌshən, hīˌdrəjənāˈshən [key], chemical reaction of a substance with molecular hydrogen, usually in the presence of a catalyst. A common hydrogenation is the harde...

(Encyclopedia) ammonium group, in chemistry, a positively charged nitrogen atom joined by single bonds to four other atoms or groups. The simplest ammonium group, NH4+, is formed by protonation of ammonia, NH3, e.g....

(Encyclopedia) Grubbs, Robert Howard, 1942–2021, American chemist, b. near Possum Trot, Ky., Univ. of Florida (B.S., 1963; M.S., 1965), Columbia, Univ. (Ph.D, 1968)....

(Encyclopedia) fatty acid, any of the organic carboxylic acids present in fats and oils as esters of glycerol. Molecular weights of fatty acids vary over a wide range. The carbon skeleton of any fatty acid is unbran...

(Encyclopedia) benzene bĕnˈzēn, bĕnzēnˈ [key], colorless, flammable, toxic liquid with a pleasant aromatic odor. It boils at 80.1℃ and solidifies at 5.5℃. Benzene is a hydrocarbon, with formula C6H6. The s...

(Encyclopedia) social security, government program designed to provide for the basic economic security and welfare of individuals and their dependents. The programs classified under the term social security differ f...

(Encyclopedia) counterfeiting, manufacturing spurious coins, paper money, or evidences of governmental obligation (e.g., bonds) in the semblance of the true. There must be sufficient resemblance to the genuine artic...