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zur Hausen, Harald

(Encyclopedia)zur Hausen, Harald, 1936–, German virologist, M.D. Univ. of Düsseldorf, 1960. He was a researcher at the Univ. of Würzburg, Germany (1968–72), chairman of the Institute of Clinical Virology, Erl...

Derby, Elias Hasket

(Encyclopedia)Derby, Elias Hasket dûrˈbē [key], 1739–99, American merchant, b. Salem, Mass. He inherited the considerable wealth and maritime business that his father, Richard Derby (1712–83), also of Salem,...

digital-to-analog conversion

(Encyclopedia)digital-to-analog or D/A conversion, the process of changing discrete digital data into a continuously varying signal in relation to a standard or reference. There are two types of converters: electro...

episome

(Encyclopedia)episome ĕpˈĭsōm [key], unit of genetic material composed of a series of genes that sometimes has an independent existence in a host cell and at other times is integrated into a chromosome of the c...

Galen

(Encyclopedia)Galen gāˈlən [key], c.130–c.200, physician and writer, b. Pergamum, of Greek parents. After study in Greece and Asia Minor and at Alexandria, he returned to Pergamum, where he served as physician...

Dollier de Casson, François

(Encyclopedia)Dollier de Casson, François fräNswäˈ dôlyāˈ də käsôNˈ [key], 1636–1701, priest and explorer in Canada, b. near Nantes, France. In 1657 he entered the seminary of Saint-Sulpice, Paris, and...

Kenosha

(Encyclopedia)Kenosha kĭnōˈshə [key], industrial city (2020 pop. 99,986), seat of Kenosha co., SE Wis., a ...

Skelton, John

(Encyclopedia)Skelton, John, 1460–1529, English poet and humanist. Tutor to Prince Henry (later Henry VIII), he later (c.1502) became rector of Diss, Norfolk. In 1512 he began to call himself royal orator, a posi...

Bray, Thomas

(Encyclopedia)Bray, Thomas, 1656–1730, English clergyman and philanthropist. In 1696 he was selected by the bishop of London as his commissary to establish the Anglican church in Maryland. Bray recruited missiona...

Bergius, Friedrich Karl Rudolf

(Encyclopedia)Bergius, Friedrich Karl Rudolf, 1884–1949, German chemist, Ph.D. Univ. of Leipzig, 1907. In 1910, Bergius set up a laboratory to carry out his research and in 1914 transferred the operation to the E...