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Du Pont, Pete

(Encyclopedia) Du Pont, Pete (Pierre Samuel du Pont IV), 1935-2021, Wilmington, Del, Princeton Univ. (Mech. Engr., 1956); Harvard Law School (J.D., 1963). Du Pont wa...

hydrogen sulfide

(Encyclopedia)hydrogen sulfide, chemical compound, H2S, a colorless, extremely poisonous gas that has a very disagreeable odor, much like that of rotten eggs. It is slightly soluble in water and is soluble in carbo...

Arnold, Frances Hamilton

(Encyclopedia)Arnold, Frances Hamilton, 1956–, American chemical engineer, b. Edgewood, Pa., Ph.D. Univ. of California, Berkeley, 1985. Arnold has been a professor at the California Institute of Technology since ...

perfluoroalkyl and polyfluoroalkyl substances

(Encyclopedia)perfluoroalkyl and polyfluoroalkyl substances (PFAS), a group of several thousand synthetic organic chemical compounds made up of a chain of carbon atoms bonded to fluorine atoms. PFAS, which resist w...

Yashin, Lev Ivanovich

(Encyclopedia)Yashin, Lev Ivanovich, 1929–90, Russian soccer player. A superb goalkeeper, perhaps the best in the history of the game, he was a Soviet sports hero. Yashin spent his playing career (1949–71) with...

polymorphism

(Encyclopedia)polymorphism, of minerals, property of crystallizing in two or more distinct forms. Calcium carbonate is dimorphous (two forms), crystallizing as calcite or aragonite. Titanium dioxide is trimorphous;...

Hofu

(Encyclopedia)Hofu hōˈfo͞o [key], city, Yamaguchi prefecture, SW Honshu, Japan, on the Suo Sea. It is a ...

germicide

(Encyclopedia)germicide jûrˈmĭsīd [key], chemical substance capable of killing many different types of microorganisms; also called disinfectant. ...

Rocky Hill

(Encyclopedia)Rocky Hill, town (1990 pop. 16,554), Hartford co., central Conn., a suburb of Hartford, on the Connecticut River; settled c.1650, inc. 1843. Chemical coatings and synthetic textiles are made there. Ro...

Ulhasnagar

(Encyclopedia)Ulhasnagar o͞olˈhəsnəgər [key], city (1991 pop. 368,772), Maharashtra state, W central India. It is a residential and industrial suburb of Mumbai, with chemical and textile chemicals. It lies in ...