the general schedule the general schedule gs is the predominant pay scale for federal employees especially employees in professional technical administrative or clerical positions the system consists of 15 grades from gs 1 the lowest level to gs 15 the highest level there are also 10 steps within each grade
chromophore(Noun) that part of the molecule of a dye responsible for its colour. chromophore(Noun) (more generally) the group of atoms in a molecule in which the electronic transition responsible for a given spectral band is located.
paper chromatography paÂ·per chromatography (pÄ'pÉr) n. A form of partition chromatography in which the moving phase is a liquid and the stationary phase is paper. chromatography chroÂ·maÂ·togÂ·raÂ·phy (krÅ'mÉ-tÅg'rÉ-fÄ) n. Any of various techniques for the separation of complex mixtures that rely on the differential affinities of substances for a gas or liquid mobile medium and for a stationary adsorbing medium through which they pass, such as paper, gelatin, or magnesia. Also called absorption chromatography.