| poly-beta-hydroxybutyrate | <biochemistry> A common storage material of prokaryotic cells consisting of a polymer of beta-hydroxybutyrate (PHB) or other beta-alkanoic acids (PHA). (09 Oct 1997) |
|---|---|
| poly-beta-hydroxybutyrate polymerase | <enzyme> 3rd enzyme of the poly-beta-hydroxybutyrate biosynthetic pathway in alcaligens eutrophus; acts via, an acyl s-enzyme intermediate Registry number: EC 2.3.1.- Synonym: phb polymerase, phb synthase, phac gene product, poly-beta-hydroxybutyrate synthetase (26 Jun 1999) |
| poly-mountain | <botany> Same as Poly. The closely related Teucrium montanum, formerly called Polium montanum, a plant of Southern Europe. The Bartsia alpina, a low purple-flowered herb of Europe. Source: Websters Dictionary (01 Mar 1998) |
| Polya gastrectomy | Operation in which a portion of the stomach is removed and a retrocolic gastrojejunostomy is constructed in an end-to-side fashion to the entire cut end of the stomach. Synonym: Polya's operation. (05 Mar 2000) |
| Polya's operation | Operation in which a portion of the stomach is removed and a retrocolic gastrojejunostomy is constructed in an end-to-side fashion to the entire cut end of the stomach. Synonym: Polya's operation. (05 Mar 2000) |
| Polya, Jeno | <person> Hungarian surgeon, 1876-1944. See: Polya gastrectomy, Polya's operation, Reichel-Polyastomach resection. (05 Mar 2000) |
| polyacid | <chemistry> Capable of neutralising, or of combining with, several molecules of a monobasic acid; having more than one hydrogen atom capable of being replaced by acid radicals; said of certain bases; as, calcium hydrate and glycerin are polyacid bases. Origin: Poly- + acid. Source: Websters Dictionary (01 Mar 1998) |
| polyacrilamide gel | A white, water-soluble, solid gel used as a gel base for electrophoresisand as a thickening or adhesive additive in other industrialapplications. (09 Oct 1997) |
| polyacron | Origin: NL, fr. Gr. Polys many + 'akron summit. <geometry> A solid having many summits or angular points; a polyhedron. Source: Websters Dictionary (01 Mar 1998) |
| polyacrylamide | A branched polymer of acrylamide (H2C==CHCONH2) that is used in gel electrophoresis; e.g., R-CH2-CH(CONH2)-CH(CONHRCH(CONHR')-R'. (05 Mar 2000) |
| polyacrylamide gel electrophoresis | Analytical and separative technique in which molecules, particularly proteins, are separated by their different electrophoretic mobilities in a hydrated gel. The gel suppresses convective mixing of the fluid phase through which the electrophoresis takes place and contributes molecular sieving. Commonly carried out in the presence of the anionic detergent sodium dodecylsulphate (SDS). SDS denatures proteins so that noncovalently associating sub unit polypeptides migrate independently and by binding to the proteins confers a net negative charge roughly proportional to the chain weight. See: SDS PAGE. (21 Jun 1999) |
| polyactina | <zoology> An old name for those Anthozoa which, like the actinias, have numerous simple tentacles. Origin: NL. See Poly-, and Actinia. Source: Websters Dictionary (01 Mar 1998) |
| polyadelphia | <botany> A Linnaean class of plants having stamens united in three or more bodies or bundles by the filaments. Origin: NL, fr. Gr. Many + brother. Source: Websters Dictionary (01 Mar 1998) |
| polyadelphous | <botany> Belonging to the class Polyadelphia; having stamens united in three or more bundles. Source: Websters Dictionary (01 Mar 1998) |
| polyadenitis | Inflammation of many lymph nodes, especially with reference to the cervical group. (05 Mar 2000) |