acceptor atoms

атом-акцептор

English-Bulgarian polytechnical dictionary . 2013.

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  • acceptor — /ak sep teuhr/, n. 1. accepter. 2. Finance. a person who accepts a draft or bill of exchange, esp. the drawee who signs the draft or bill, confirming a willingness to pay it when due. 3. Also called acceptor atom, acceptor impurity. Physics. an… …   Universalium

  • Extrinsic semiconductor — An extrinsic semiconductor is a semiconductor that has been doped , that is, into which a doping agent has been introduced, giving it different electrical properties than the intrinsic (pure) semiconductor. Doping involves adding dopant atoms to… …   Wikipedia

  • dopant — /doh peuhnt/, n. Electronics. an impurity added intentionally in a very small, controlled amount to a pure semiconductor to change its electrical properties: Arsenic is a dopant for silicon. [1960 65; DOPE + ANT] * * * Any impurity added to a… …   Universalium

  • P-type semiconductor — A P type semiconductor (P for Positive) is obtained by carrying out a process of doping: that is, adding a certain type of atoms to the semiconductor in order to increase the number of free charge carriers (in this case positive holes). When the… …   Wikipedia

  • Electrical resistance — is a ratio of the degree to which an object opposes an electric current through it, measured in Ohms. Its reciprocal quantity is electrical conductance measured in Siemens. Assuming a uniform current density, an object s electrical resistance is… …   Wikipedia

  • germanium — /jeuhr may nee euhm/, n. Chem. a scarce, metallic, grayish white element, normally tetravalent, used chiefly in transistors. Symbol: Ge; at. wt.: 72.59; at. no.: 32; sp. gr.: 5.36 at 20°C. [1885 90; GERMAN(Y) + IUM] * * * Chemical element with… …   Universalium

  • metabolism — /meuh tab euh liz euhm/, n. 1. Biol., Physiol. the sum of the physical and chemical processes in an organism by which its material substance is produced, maintained, and destroyed, and by which energy is made available. Cf. anabolism, catabolism …   Universalium

  • photosynthesis — photosynthetic /foh teuh sin thet ik/, adj. photosynthetically, adv. /foh teuh sin theuh sis/, n. Biol., Biochem. (esp. in plants) the synthesis of complex organic materials, esp. carbohydrates, from carbon dioxide, water, and inorganic salts,… …   Universalium

  • Hydrogen bond — A hydrogen bond results from a dipole dipole force between an electronegative atom and a hydrogen atom bonded to nitrogen, oxygen or fluorine (thus the name hydrogen bond , which must not be confused with a covalent bond to hydrogen). The energy… …   Wikipedia

  • cell — cell1 cell like, adj. /sel/, n. 1. a small room, as in a convent or prison. 2. any of various small compartments or bounded areas forming part of a whole. 3. a small group acting as a unit within a larger organization: a local cell of the… …   Universalium

  • Oxidative phosphorylation — The electron transport chain in the mitochondrion is the site of oxidative phosphorylation in eukaryotes. The NADH and succinate generated in the citric acid cycle are oxidized, releasing energy to power the ATP synthase. Oxidative… …   Wikipedia

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