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Bernoulli's principle

(Encyclopedia)CE5 Bernoulli's principle Bernoulli's principle, physical principle formulated by Daniel Bernoulli that states that as the speed of a moving fluid (liquid or gas) increases, the pressure within th...

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...

Wilkins, Maurice Hugh Frederick

(Encyclopedia)Wilkins, Maurice Hugh Frederick, 1916–2004, British biophysicist, b. New Zealand, Ph.D. Univ. of Birmingham, 1940. He conducted research at the Univ. of St. Andrews, Scotland, and at Kings College, ...

Boscovich, Ruggiero Giuseppe

(Encyclopedia)Boscovich, Ruggiero Giuseppe ro͞od-jāˈrō jo͞ozĕpˈpā bôsˈkōvēch [key], 1711–87, Italian mathematician, astronomer, and physicist. He became a Jesuit and taught at Rome, Pavia, and Milan. ...

Tonegawa, Susumu

(Encyclopedia)Tonegawa, Susumu, 1939–, Japanese molecular biologist, Ph.D. Univ. of California at San Diego, 1969. A member of the Basel Institute for Immunology in Switzerland (1971–81), he became a professor ...

Lowell, Amy

(Encyclopedia)Lowell, Amy, 1874–1925, American poet, biographer, and critic, b. Brookline, Mass., privately educated; sister of Percival Lowell and Abbott Lawrence Lowell. In 1912 she published A Dome of Many-Col...

pulse, in anatomy

(Encyclopedia)pulse, alternate expansion and contraction of artery walls as heart action varies blood volume within the arteries. Artery walls are elastic. Hence they become distended by increased blood volume duri...

surface chemistry

(Encyclopedia)surface chemistry, study of chemical reactions in which the reactants are first adsorbed onto a surface medium (see adsorption) that then acts as a catalyst for the reaction; after the reaction the pr...

specific heat

(Encyclopedia)specific heat, ratio of the heat capacity of a substance to the heat capacity of a reference substance, usually water. Heat capacity is the amount of heat needed to change the temperature of a unit ma...

Altman, Sidney

(Encyclopedia)Altman, Sidney, 1939–, Canadian-American molecular biologist, b. Montreal, Ph.D., Univ. of Colorado, 1967. A professor at Yale Univ. since 1971, he discovered that RNA could function as enzymes; it ...