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Grignard reagent

(Encyclopedia)Grignard reagent grēnyärdˈ rēāˈjənt [key], any of an important class of extremely reactive chemical compounds used in the synthesis of hydrocarbons, alcohols, carboxylic acids, and other compou...

gem, ornamental mineral or organic substance

(Encyclopedia)gem, commonly, a mineral or organic substance, cut and polished and used as an ornament. Gems also are used as seals (items of assurance) and as talismans (good-luck charms). For birthstones, see mont...

vulcanization

(Encyclopedia)vulcanization vŭlˌkənəzāˈshən [key], treatment of rubber to give it certain qualities, e.g., strength, elasticity, and resistance to solvents, and to render it impervious to moderate heat and c...

metabolism

(Encyclopedia)metabolism, sum of all biochemical processes involved in life. Two subcategories of metabolism are anabolism, the building up of complex organic molecules from simpler precursors, and catabolism, the ...

Neustadt an der Weinstrasse

(Encyclopedia)Neustadt an der Weinstrasse noiˈshtät än dĕr vīnˈshträsə [key], city (1994 pop. 53,782), Rhineland-Palatinate, SW Germany; chartered 1275. It is the center of the Rhenish Palatinate wine trade...

Bruck an der Mur

(Encyclopedia)Bruck an der Mur bro͝ok än dĕr mo͞or [key], city, in Styria prov., E central Austria, at the confluence of the ...

amide

(Encyclopedia)amide ămˈīd [key], organic compound formed by reaction of an acid chloride, acid anhydride, or ester with an amine. Under strong acidic conditions an amide can be hydrolyzed to yield an amine and a...

Frankfurt an der Oder

(Encyclopedia)Frankfurt an der Oder än dĕr ōˈdər [key], city, Brandenburg, E Germany, a port on the Oder River, at the ...

Ochoa, Severo

(Encyclopedia)Ochoa, Severo sāvāˈrō ōchōˈä [key], 1905–93, American biochemist and educator, b. Spain, M.D. Univ. of Madrid, 1929. After teaching at the universities of Madrid, Heidelberg, and Oxford, he ...

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