dimer

dimer
A compound or unit produced by the combination of two like molecules; in the strictest sense, without loss of atoms (thus nitrogen tetroxide, N2O4, is the d. of nitrogen dioxide, NO2), but usually by elimination of H2O or a similar small molecule between the two ( e.g., a disaccharide), or by simple noncovalent association (as of two identical protein molecules); higher orders of complexity are called trimers, tetramers, oligomers, and polymers. [G. di-, two, + -mer]
- pyrimidine d. a product of ultraviolet radiation of pyrimidines in nucleic acid s; most frequently thymidine dimers.
- thymine d. a product of ultraviolet irradiation of thymine (free in ice or bound in nucleic acid s) in which two thymine residues become linked by formation of a cyclobutane ring involving both C-5's and both C-6's at the expense of the two double bonds; several stereoisomeric forms are possible.

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di·mer 'dī-mər n a compound formed by the union of two radicals or two molecules of a simpler compound specif a polymer formed from two molecules of a monomer
di·mer·ic (')dī-'mer-ik adj
di·mer·iza·tion or Brit di·mer·isa·tion .dī-mə-rə-'zā-shən n
di·mer·ize or Brit di·mer·ise 'dī-mə-.rīz vt, -ized or Brit -ised; -iz·ing or Brit -is·ing

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di·mer (diґmər) 1. a compound formed by combination of two identical simpler molecules. 2. a capsomer having two structural subunits.

Medical dictionary. 2011.

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  • dîmer — ● dîmer verbe intransitif Percevoir la dîme ecclésiastique. ● dîmer (synonymes) verbe intransitif Percevoir la dîme ecclésiastique. Synonymes : taxer ⇒DÎMER, verbe. Vieux A. Emploi intrans. [Gén. suivi d un compl. circ. de lieu] Lever la dîme.… …   Encyclopédie Universelle

  • Dimer — may refer to: Dimer (chemistry), a chemical structure formed from two sub units Dimer model, an item in statistical mechanics Protein dimer, a protein quaternary structure Julius Dimer (1871–1945), a German chess master Dimerous refer to plants… …   Wikipedia

  • dimer — DIMÉR, dimeri, s.m. Compus chimic rezultat din combinarea a două molecule din aceeaşi specie de substanţe. – Din fr. dimère. Trimis de LauraGellner, 13.07.2004. Sursa: DEX 98  DIMÉR s. (fiz., chim.) moleculă dublă. Trimis de siveco, 05.08.2004.… …   Dicționar Român

  • dîmer — DÎMER. v. n. Avoir droit de lever la dîme en un lieu. Cet Abbé dîme dans tous ces Villages. f♛/b] Il se dit aussi en parlant De celui qui, actuellement, lève la dîme. On n a pas dîmé en ce champ là. Il est allé dîmer au pressoir. [b]Dîmé, ée.… …   Dictionnaire de l'Académie Française 1798

  • dimer — [dī′mər] n. [ DI 1 + (POLY)MER] a compound formed by the combination of two identical molecules or monomers dimeric [dī′mer′ik] adj …   English World dictionary

  • dîmer — (di mé) v. n. 1°   Lever la dîme. Dîmer dans un champ, sur un vignoble. L abbé dîmait dans tous ses villages. 2°   Fig. Faire un prélèvement. •   Nous laissant dîmer sur un bien Qui ne vous coûte presque rien, LA FONT. Cord..    Activement.… …   Dictionnaire de la Langue Française d'Émile Littré

  • Dimer — Ein Dimer ist ein Molekül oder ein Molekülverbund, der aus zwei oft identischen Untereinheiten, den Monomeren, besteht. In Bezug auf die Größe, die Molekülmasse und die Komplexität ist das Dimer das einfachste Oligomer bzw. Polymer. Den Vorgang… …   Deutsch Wikipedia

  • DÎMER — v. n. Lever la dîme. Dîmer dans un champ. Dîmer sur un quartier de vigne. Dîmer au pressoir.   Il signifie aussi, Avoir droit de lever la dîme en un lieu. Cet évêque, ce seigneur dîmait sur toutes les terres à une lieue à la ronde. L abbé dîmait… …   Dictionnaire de l'Academie Francaise, 7eme edition (1835)

  • dimer — oligomer o*lig o*mer, n. (Chem.) A molecule composed of a small number of linked monomer units; a short polymer; compounds called oligomers have less than one hundred monomer units and usually less than thirty. Oligomers of increasing length are… …   The Collaborative International Dictionary of English

  • dimer — dimeras statusas T sritis chemija apibrėžtis Dviejų tokių pat molekulių susijungimo produktas. atitikmenys: angl. dimer rus. димер …   Chemijos terminų aiškinamasis žodynas

  • dimer — 1. A molecule formed by the covalent combination of two monomers, generally accompanied by elimination of water. 2. The reversible association of two similar (or nearly similar) molecules. The active form of many enzymes is as a dimer between two …   Glossary of Biotechnology

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