rideal-walker test — rə̇ˈdē(ə)lˈwȯkə(r) noun Usage: usually capitalized R&W Etymology: after Samuel Rideal died 1929 & J.T.A.Walker English chemists : a test for determining the phenol coefficient especially of a disinfectant … Useful english dictionary
Rideal-Walker coefficient — The Rideal Walker coefficient is a figure expressing the disinfecting power of any substance and is obtained by dividing the figure indicating the degree of dilution of the disinfectant that kills a microorganism in a given time by that… … Wikipedia
Rideal-Walker coefficient method (test) — Rid·e·al Walk·er coefficient, method (test) (ridґe əl wawkґər) [Samuel Rideal, English chemist, 1863–1929; J.T. Ainslie Walker, English chemist, 1868–1930] see phenol coefficient, under coefficient, and see under method … Medical dictionary
Rideal-Walker method — a method for calculating the phenol coefficient of a disinfectant; cultures of Salmonella enterica subsp. enterica serovar Typhi are incubated with serial dilutions of the test compound, with dilutions of phenol as standards. Samples are removed… … Medical dictionary
coefficient — 1. The expression of the amount or degree of any quality possessed by a substance, or of the degree of physical or chemical change normally occurring in that substance under stated conditions. 2. The ratio or factor that relates a quantity… … Medical dictionary
method — The mode or manner or orderly sequence of events of a process or procedure. SEE ALSO: fixative, operation, procedure, stain, technique. [G. methodos; fr. meta, after, + hodos, way] Abell Kendall m. a … Medical dictionary
Phenol coefficient — is a measure of the bactericidal activity of a chemical compound in relation to phenol. When listed numerically, the figure expressing the disinfecting power of a substance by relating it to the disinfecting power of phenol may be a function of… … Wikipedia
phenol coefficient — n a number relating the germicidal efficiency of a compound to phenol regarded as having an arbitrarily assigned value of 1 toward specified bacteria (as typhoid bacteria) under specified conditions * * * a measure of the bactericidal activity of … Medical dictionary
1990 New Year Honours — Contents 1 United Kingdom 1.1 Life Peers 1.2 Privy Counsellors 1.3 Knights Bachelor 1.4 Order of the … Wikipedia
Barnsley — For the larger local government district, see Metropolitan Borough of Barnsley. For other uses, see Barnsley (disambiguation). Coordinates: 53°33′13″N 1°28′45″W / … Wikipedia
