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aging
(Encyclopedia) aging, in biology, cumulative changes in an organism, organ, tissue, or cell leading to a decrease in functional capacity. In humans, aging is associated with degenerative changes in…steel industry
(Encyclopedia) steel industry, the business of processing iron ore into steel, which in its simplest form is an iron-carbon alloy, and in some cases, turning that metal into partially finished…lithography
(Encyclopedia) lithographylithographylĭthŏgˈrəfē [key], type of planographic or surface printing. It is distinguished from letterpress (relief) printing and from intaglio printing (in which the…photographic processing
(Encyclopedia) photographic processing, set of procedures by which the latent, or invisible, image produced when a photographic film is exposed to light is made into a permanent visible image.…Eastman, George
(Encyclopedia) Eastman, George, 1854–1932, American inventor, industrialist, and philanthropist, b. Waterville, N.Y. By mass production of his photographic inventions, Eastman enormously stimulated…pasteurization
(Encyclopedia) pasteurizationpasteurizationpăsˌch&oobreve;rĭzāˈshən, –rīzāˈshən [key], partial sterilization of liquids such as milk, orange juice, wine, and beer, as well as cheese, to destroy…excretion
(Encyclopedia) excretion, process of eliminating from an organism waste products of metabolism and other materials that are of no use. It is an essential process in all forms of life. In one-celled…Birkeland, Kristian
(Encyclopedia) Birkeland, Kristian or Olaf ChristianBirkeland, Kristian or Olaf Christiankrĭsˈtyän bērˈkəlän, ōˈläv [key], 1867–1917, Norwegian physicist. From 1898 Birkeland was a professor at the…polymerase chain reaction
(Encyclopedia) polymerase chain reactionpolymerase chain reactionpŏlˈĭmərāsˌ [key] (PCR), laboratory process in which a particular DNA segment from a mixture of DNA chains is rapidly replicated,…chocolate
(Encyclopedia) chocolate, general term for the products of the seeds of the cacao or chocolate tree, used for making beverages or confectionery. The flavor of chocolate depends not only on the…Trending
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