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albumin

(Encyclopedia)albumin ălbyo͞oˈmən [key] [Lat.,=white of egg], member of a class of water-soluble, heat-coagulating proteins. Albumins are widely distributed in plant and animal tissues, e.g., ovalbumin of egg, ...

hydrogenation

(Encyclopedia)hydrogenation hīdrôjˈənāˌshən, hīˌdrəjənāˈshən [key], chemical reaction of a substance with molecular hydrogen, usually in the presence of a catalyst. A common hydrogenation is the harde...

injection

(Encyclopedia)injection, introduction of a fluid into the body, usually by means of a needle and syringe. The material injected may be a test substance (as in determining allergic sensitivity or immunity to a disea...

granite

(Encyclopedia)granite, coarse-grained igneous rock of even texture and light color, composed chiefly of quartz and feldspars. It usually contains small quantities of mica or hornblende, and minor accessory minerals...

forging

(Encyclopedia)forging, shaping metal by heating it and then hammering or rolling it. Forging is the method by which metal was first worked when it came into use about 4000 b.c. in Egypt and Asia. Modern forging is ...

Murad II

(Encyclopedia)Murad II, 1403–51, Ottoman sultan (1421–51), son and successor of Muhammad I to the throne of the Ottoman Empire (Turkey). He was opposed at his accession by a pretender, Mustafa, who rapidly gain...

Maricopa

(Encyclopedia)Maricopa märĭkōˈpə, mâr– [key], Native North Americans whose language belongs to the Yuman branch of the Hokan-Siouan linguistic stock (see Native American languages). At some time in the past...

La Bourdonnais, Bertrand François, comte Mahé de

(Encyclopedia)La Bourdonnais, Bertrand François, comte Mahé de bĕrträNˈ fräNswäˈ, kôNt mäāˈ də lä bo͝ordônāˈ [key], 1699–1753, French naval officer. He entered the service of the French India Co...

Bergström, Sune Karl

(Encyclopedia)Bergström, Sune Karl so͞oˈnə, bĕrˈyəström [key], 1916–2004, Swedish biochemist, grad. Karolinska Institute (Ph.D., M.D., 1944). With his former pupil B. I. Samuelsson and John R. Vane, he wa...

Ter-Petrossian, Levon

(Encyclopedia)Ter-Petrossian, Levon, 1945–, Armenian political leader, president of Armenia (1991–98), b. Aleppo, Syria, grad. Yerevan State Univ. (1971), Leningrad Oriental Studies Institute (Ph.D., 1987). A s...