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Boyd Orr, John Boyd Orr, 1st Baron

(Encyclopedia)Boyd Orr, John Boyd Orr, 1st Baron, 1880–1971, British nutritionist and agricultural scientist, b. Scotland, grad. Univ. of Glasgow. He was professor of agriculture at the Univ. of Aberdeen (1942–...

ethyl

(Encyclopedia)ethyl ĕthˈəl [key], CH3CH2, organic free radical or alkyl group derived from ethane by removing one hydrogen atom. ...

Focillon, Henri

(Encyclopedia)Focillon, Henri äNrēˈ fôsēyôNˈ [key], 1881–1943, French art historian. Focillon, who was professor of art history at the Collège de France, was an authority on medieval art, the subject of h...

mechanism

(Encyclopedia)mechanism, philosophical theory about the nature of organic systems, holding that organisms are machines in the sense that they are material systems. Mechanism seeks to explain biological processes, i...

loam

(Encyclopedia)loam, soil composed of sand, silt, clay, and organic matter in evenly mixed particles of various sizes. More fertile than sandy soils, loam is not stiff and tenacious like clay soils. Its porosity all...

Louis, Morris

(Encyclopedia)Louis, Morris, 1912–62, American painter, b. Baltimore. A practitioner of color-field painting, Louis was noted for soaking poured paint through unsized and often unstretched canvas. Prior to 1960 h...

benzine

(Encyclopedia)benzine bĕnˈzēn, bĕnzēnˈ [key], colorless, highly flammable liquid. It is used as a cleaning agent because it is a solvent for organic substances such as fats, oils, and resins and is also used ...

Pucci, Emilio

(Encyclopedia)Pucci, Emilio (Marchese Emilio Pucci di Barsento) po͞oˈchē [key], 1914–92, Italian fashion designer. After establishing showrooms in Florence, Capri, and Rome, he began his signature look with el...

prosthetic group

(Encyclopedia)prosthetic group, non-amino acid portions of certain protein molecules. The key part of the prosthetic group may be either organic (such as a vitamin) or inorganic (such as a metal) and is usually req...

Perkin, Sir William Henry

(Encyclopedia)Perkin, Sir William Henry, 1838–1907, English chemist. In 1856 he discovered the first aniline dye (aniline purple, known as mauve and mauveine); by founding a factory to make it, Perkin established...