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absorption

(Encyclopedia)absorption [Lat.,=sucking from], taking of molecules of one substance directly into another substance. It is contrasted with adsorption, in which the molecules adhere only to the surface of the second...

photostat

(Encyclopedia)photostat fōˈtəstătˌ [key], reproduction of any printed or simple black-and-white material, such as drawings or manuscripts, made by the Photostat, a photographic camera. While slower and more ex...

North, Douglass Cecil

(Encyclopedia)North, Douglass Cecil, 1920–2015, American economic historian, b. Cambridge, Mass., Ph.D. Univ. of California, Berkeley, 1952. North was on the faculty at the Univ. of Washington, Seattle (1950–83...

Ciliophora

(Encyclopedia)Ciliophora sĭlˌē-ŏfˈərə [key], phylum in the kingdom Protista consisting of the ciliates, or ciliophores, complex freshwater or saltwater protozoans that swim by the coordinated beating of thei...

cire perdue

(Encyclopedia)cire perdue sēr pĕrdüˈ [key] [Fr.,=lost wax], sculptural process of metal casting that may be used for hollow and solid casting. The sculptor makes a model in plaster or clay that is then coated w...

amylase

(Encyclopedia)amylase ămˈəlāsˌ [key], enzyme having physiological, commercial, and historical significance, also called diastase. It is found in both plants and animals. Amylase was purified (1835) from malt b...

germination

(Encyclopedia)germination, in a seed, process by which the plant embryo within the seed resumes growth after a period of dormancy and the seedling emerges. The length of dormancy varies; the seed of some plants (e....

Goodyear, Charles

(Encyclopedia)Goodyear, Charles, 1800–1860, American inventor, b. New Haven, Conn., originator of vulcanized rubber. He failed in his earlier business ventures and was in jail for debt when he began his experimen...

sucrose

(Encyclopedia)sucrose so͞oˈkrōs [key], commonest of the sugars, a white, crystalline solid disaccharide (see carbohydrate) with a sweet taste, melting and decomposing at 186℃ to form caramel. It is known commo...

Adams, Gerry

(Encyclopedia)Adams, Gerry (Gerard Adams), 1948–, Northern Irish political leader. Born into an Irish nationalist family, Adams became politically active during the Catholic civil rights demonstrations of the 196...