polybasic


Also found in: Dictionary, Medical, Wikipedia.

polybasic

[¦päl·i‚bā·sik]
(chemistry)
A chemical compound in solution that yields two or more H- ions per molecule, such as sulfuric acid, H2SO4.
References in periodicals archive ?
Williams, "The polybasic region of Ras and Rho family small GTPases: a regulator of protein interactions and membrane association and a site of nuclear localization signal sequences," Cellular Signalling, vol.
The presence of an amino group in the elementary unit leads to two possible chemical forms of CTS in ready fibers, namely, the polycationic and polybasic forms, depending on the preparation technique used [ 27].
Soluble hemojuvelin is released by proprotein convertase-mediated cleavage at a conserved polybasic RNRR site.
Polyols prepared from palm oil were reacted with carboxy-functional acrylic copolymer instead of di-or polybasic acids to produce acrylic alkyd resin.
Pathogenicity of HPAI viruses is associated with polybasic amino acids (arginine and lysine) at their HA cleavage site motif (Wood et al., 1993) which enable them to replicate and damage all the vital organs and tissues ultimately resulting in death of the infected birds (Rott, 1992).
Quercetin sensitizes RBL-2H3 cells to polybasic mast cell secretagogues through increased expression of [G.sub.i] GTP-bindinq proteins linked to a phospholipase C signaling pathway.
Extraction fluid Category Examples DI Water 10% Acetic acid Monobasic weak acids Vinegar 10% Citric acid Polybasic weak acids Lemon juice, orange juice 1% and 5% Strong acids Acid bleach, battery acid, Hydrochloric acid Coca-Cola 10% Magnesium Multivalent salts Epsom salts, cream of tartar sulfate 2% and 10% Monovalent salts Common salt, borax Sodium chloride The resinates were mixed with different volumes of each extraction fluid and the amount extracted after 30 min was measured.
Polybasic acids play an important role in biological and industrial processes and accurate knowledge of their properties is therefore required.
Compound 48/80, the best-known polybasic histamine releaser, was discovered in the search for hypotensive agents.
An unsaturated polyester resin system consists of a resin formed by the partial reaction of a polybasic alcohol with a saturated or unsaturated polybasic acid, and a monomer, which dissolves that resin and acts as the crosslinking or thermosetting agent.
pH calculations involving hydrolysis, polybasic acids, buffer solutions and the common titrametric methods are treated in chapters 7 through 12 with most of the templates providing for graphing.
Low pathogenicity avian influenza viruses contain monobasic cleavage sites, and highly pathogenic avian influenza viruses contain polybasic cleavage sites (40).