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Zernike, Frits

(Encyclopedia)Zernike, Frits, 1888–1966, Dutch physicist, Ph.D. Univ. of Amsterdam, 1915. He was on the faculty at the Univ. of Groningen from 1915 until his retirement in 1958. Zernike received the 1953 Nobel Pr...

Cannon, Walter Bradford

(Encyclopedia)Cannon, Walter Bradford, 1871–1945, American physiologist. While still a medical student at Harvard, Cannon was the first to demonstrate (1897) that bismuth could be utilized as a contrast medium in...

seasonal affective disorder

(Encyclopedia)seasonal affective disorder (SAD), recurrent fall or winter depression characterized by excessive sleeping, social withdrawal, depression, overeating, and pronounced weight gain. SAD effects an estima...

tropical medicine

(Encyclopedia)tropical medicine, study, diagnosis, treatment, and prevention of certain diseases prevalent in the tropics. The warmth and humidity of the tropics and the often unsanitary conditions under which so m...

quarantine

(Encyclopedia)quarantine kwŏrˈəntēn [key], isolation of persons, animals, places, and effects that carry or are suspected of harboring communicable disease. The term originally referred to the 40 days of offsho...

whooping cough

(Encyclopedia)whooping cough or pertussis, highly communicable infectious disease caused by the bacterium Bordetella pertussis. The early or catarrhal stage of whooping cough is manifested by the usual symptoms of ...

Nattier, Jean-Marc

(Encyclopedia)Nattier, Jean-Marc zhäN-märk nätyāˈ [key], 1685–1766, French painter; son of the painter Marc Nattier and the miniaturist Marie Courtois. His early works include historical and mythological pai...

codeine

(Encyclopedia)codeine kōˈdēn [key], alkaloid found in opium. It is a narcotic whose effects, though less potent, resemble those of morphine. An effective cough suppressant, it is mainly used in cough medicines. ...

haze

(Encyclopedia)haze, suspension in the atmosphere of minute dust or salt particles that are not individually seen but that nevertheless reduce visibility. So-called damp haze and dry haze produce different optical e...

Bovet, Daniele

(Encyclopedia)Bovet, Daniele bōvāˈ [key], 1907–92, Italian pharmacologist, b. Switzerland, D.Sc. Univ. of Geneva, 1929. From 1929 to 1947 he was a researcher and then head of the laboratory of therapeutic chem...