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Leidy, Joseph

(Encyclopedia)Leidy, Joseph līˈdē [key], 1823–91, American scientist, b. Philadelphia, grad. Univ. of Pennsylvania medical school. From 1853 he taught anatomy at his alma mater. He was also professor of natura...

Klobuchar, Amy Jean

(Encyclopedia) Klobuchar, Amy Jean, Senator from Minnesota, 1960- , b. Plymouth, Mn,, Yale University (B.A., 1982), University of Chicago Law School (J.D., 1985)....

Davis, Raymond, Jr.

(Encyclopedia)Davis, Raymond, Jr., 1914–2006, American astrochemist, Ph.D. Yale Univ. 1942. Davis, who served in the Army Air Forces from 1942 to 1946, was a researcher at Monsanto Chemical Company (1946–48) an...

Avogadro's number

(Encyclopedia)Avogadro's number ävōgäˈdrō [key] [for Amedeo Avogadro], number of particles contained in one mole of any substance; it is equal to 602,252,000,000,000,000,000,000, or in scientific notation, 6.0...

Koshiba, Masatoshi

(Encyclopedia)Koshiba, Masatoshi, 1926–2020, Japanese physicist, Ph.D. Univ. of Rochester, 1955. He was a professor at the Univ. of Tokyo from 1958 (emeritus from 1987) and at the Univ. of Tokai from 1987 to 1997...

Phoronida

(Encyclopedia)Phoronida fərŏnˈədə [key], small phylum of slender, wormlike marine tube-dwellers, typically found in temperate, shallow seas. About 10 species are known. Although the body is free in the tube, t...

Q fever

(Encyclopedia)Q fever, disease caused by Coxiella burnetii, a small, Gram-negative bacterium. The bacterium infects livestock (cattle, goats, and sheep) and other domesticated animals, and is found in the urine, fe...

Perrin, Jean Baptiste

(Encyclopedia)Perrin, Jean Baptiste zhäN bätēstˈ pĕrăNˈ [key], 1870–1942, French physicist. From 1910 to 1940 he was professor at the Univ. of Paris, and in 1941 he came to the United States. Perrin specia...

dialysis

(Encyclopedia)dialysis dīălˈĭsĭs [key], in chemistry, transfer of solute (dissolved solids) across a semipermeable membrane. Strictly speaking, dialysis refers only to the transfer of the solute; transfer of t...

tape recorder

(Encyclopedia)CE5 Magnetic tape-recording system tape recorder, device for recording and replaying of sound, video, and digital information on plastic (usually polyester) or paper tape. The tape is coated with ...