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cytochrome

(Encyclopedia)cytochrome sīˈtəkrōmˌ [key], protein containing heme (see coenzyme) that participates in the phase of biochemical respiration called oxidative phosphorylation. Cytochromes act as carriers of hydr...

Gunter, Edmund

(Encyclopedia)Gunter, Edmund, 1581–1626, English mathematician and astronomer, educated at Westminster School, London, and Christ Church, Oxford. He invented (1618) a small portable quadrant and discovered (1622)...

Simeon I

(Encyclopedia)Simeon I, c.863–927, ruler (893–927) and later first czar of Bulgaria. He was placed on the throne by his father, Boris I, who had returned from a monastery to depose his first son, Vladimir (reig...

Nemtsov, Boris Yefimovich

(Encyclopedia)Nemtsov, Boris Yefimovich, 1959–2015, Russian physicist and politician. He worked at the Gorky Radiophysics Research Institute (1981–90) before he was elected to the Soviet Congress of People's De...

Roehm, Ernst

(Encyclopedia)Roehm or Röhm, Ernst both: ĕrnst röm [key], 1887–1934, German National Socialist leader. An army officer in World War I, he met (1919) Adolf Hitler, whose political career he helped to launch. Ro...

Weber, Carl Maria Friedrich Ernst von

(Encyclopedia)Weber, Carl Maria Friedrich Ernst von frēˈdrĭkh ĕrnst fən vāˈbər [key], 1786–1826, German composer and pianist; pupil of Michael Haydn and Abbé Vogler. He made his debut as a pianist at 13 ...

cyclic compound

(Encyclopedia)cyclic compound, any one of a class of compounds whose molecules contain a number of atoms bonded together to form a closed chain or ring. If all of the atoms that form the ring are carbon, the compou...

Ardennes, department, France

(Encyclopedia)Ardennes ärdĕnˈ [key], department, NE France, in Champage, Grand Est region. The capital is Charleville-Mézières. Ardennes is also the name of a section of the easter...

Biron, Ernst Johann von

(Encyclopedia)Biron or Biren, Ernst Johann von ĕrnst yōhänˈ fən bēˈrôn, bēˈrən [key], 1690–1772, duke of Courland (1737–43, 1763–69), favorite of Czarina Anna of Russia. A Baltic nobleman, he rose ...

Spassky, Boris

(Encyclopedia)Spassky, Boris, 1937–, Soviet chess champion. A child prodigy, he became an international master at the age of 16 and in 1955, at age 18, he became an international grand master. Subsequently in int...
 

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