Colloid

prefLabel
  • colloid
definition
  • An intimate mixture of two substances, one of which, called the dispersed phase, is uniformly distributed in a finely divided state through the second substance, called the dispersion medium.
inScheme
broader
Abstract from DBPedia
    A colloid is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance. Some definitions specify that the particles must be dispersed in a liquid, while others extend the definition to include substances like aerosols and gels. The term colloidal suspension refers unambiguously to the overall mixture (although a narrower sense of the word suspension is distinguished from colloids by larger particle size). A colloid has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension). The dispersed phase particles have a diameter of approximately 1 nanometre to 1 micrometre. Some colloids are translucent because of the Tyndall effect, which is the scattering of light by particles in the colloid. Other colloids may be opaque or have a slight color. Colloidal suspensions are the subject of interface and colloid science. This field of study was introduced in 1845 by Italian chemist Francesco Selmi and further investigated since 1861 by Scottish scientist Thomas Graham. IUPAC definition Colloid: Short synonym for colloidal system. Colloidal: State of subdivision such that the molecules or polymolecular particles dispersed in a medium have at least one dimension between approximately 1 nm and 1 μm, or that in a system discontinuities are found at distances of that order.

    コロイド（膠質（こうしつ）、英: colloid）またはコロイド分散体（英: colloidal dispersion）は、一方が微小な液滴あるいは微粒子を形成し（分散相）、他方に分散した1組の相から構成された物質状態である。

    (Source: http://dbpedia.org/resource/Colloid)