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free radical

(Encyclopedia)free radical, in chemistry, a molecule or atom that contains an unpaired electron but is neither positively nor negatively charged. Free radicals are usually highly reactive and unstable. They are pro...

Olah, George Andrew

(Encyclopedia)Olah, George Andrew, 1927–2017, American chemist, b. Budapest, Ph.D. Budapest Univ. of Technology and Economics, 1949. Olah was a researcher at Dow Chemical from 1957 to 1965 and a professor at West...

Kroto, Harry

(Encyclopedia)Kroto, Harry (Sir Harold Walter Kroto), 1939–2016, British chemist, b. Harold Walter Krotoschiner, Ph.D. Univ. of Sheffield, 1964. Kroto was the son of German parents who fled Nazi rule to England. ...

Boussingault, Jean Baptiste Joseph Dieudonné

(Encyclopedia)Boussingault, Jean Baptiste Joseph Dieudonné zhäN bätēstˈ zhôzĕfˈ dyödônāˈ bo͞osăNgōˈ [key], 1802–87, French agricultural chemist. He was professor of chemistry at Lyons and later pr...

formality

(Encyclopedia)formality, in chemistry: see chemical equilibrium; concentration. ...

Kendall, Edward Calvin

(Encyclopedia)Kendall, Edward Calvin, 1886–1972, American biochemist, b. South Norwalk, Conn., grad. Columbia (B.S., 1908; Ph.D., 1910). At St. Luke's Hospital, New York City, he did research on the thyroid gland...

pharmacology

(Encyclopedia)pharmacology, study of the changes produced in living animals by chemical substances, especially the actions of drugs, substances used to treat disease. Systematic investigation of the effects of drug...

manganese

(Encyclopedia)manganese măngˈgənēs, mănˈ– [key] [Lat.,=magnet], metallic chemical element; symbol Mn; at. no. 25; at. wt. 54.93805; m.p. about 1,244℃; b.p. about 1,962℃; sp. gr. 7.2 to 7.45, depending o...

Lémery, Nicolas

(Encyclopedia)Lémery, Nicolas nēkôläˈ lāmərēˈ [key], 1645–1715, French chemist. He was a pharmacist and lecturer in Paris and was the author of a standard textbook in chemistry (1675) and of a treatise o...

Bologna, University of

(Encyclopedia)Bologna, University of, at Bologna, Italy; founded in the 11th cent. It originated as a school where law books brought from Ravenna were interpreted. It has faculties of law, political science, econom...