1 Used other than as an idiom: see outer ,â core. ( 2 planetology) The hot liquid material found near the centre of some planets, distinct from the solid inner core. ( 3 geology) The part of the Earth between the mantle and inner core, responsible for generating the planet's magnetic field. 4  Link/Cite.
Differential Staining is a staining process which uses more than one chemical stain. Using multiple stains can better differentiate between different microorganisms or structures/cellular components of a single organism.
The stains of the Capsule staining technique. Typically an acidic stain such as Congo red or nigrosin, which stains the background, and a basic stain that colorizes the cell proper are used.This technique begins as a negative stain; cells are spread in a film with an acidic stain and are not heat-fixed.