surface-active properties

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• surface-active agent — /serr fis ak tiv/, Chem. any substance that when dissolved in water or an aqueous solution reduces its surface tension or the interfacial tension between it and another liquid. Also called surfactant. * * * ▪ chemistry also called  Surfactant,  … …   Universalium

• surface-active — Indicating the property of certain agents of altering the physicochemical nature of surfaces and interfaces, bringing about lowering of interfacial tension; they usually possess both lipophilic and hydrophilic groups. SEE ALSO: surfactant. * * *… …   Medical dictionary

• surface-active — adjective Date: 1920 altering the properties and especially lowering the tension at the surface of contact between phases < soaps and wetting agents are typical surface active substances > …   New Collegiate Dictionary

• surface-active agent — a substance that exerts a change on the surface properties of a liquid, especially one that reduces its surface tension, such as a detergent. Called also surfactant …   Medical dictionary

• surface-active compound — Usually, in biological systems, means a detergent like molecule that is amphipathic and that will bind to the plasma membrane, or to a surface with which cells come in contact, altering its properties from hydrophobic to hydrophilic, or vice… …   Dictionary of molecular biology

• surface-active agent — /ˈsɜfəs ˌæktɪv ˌeɪdʒənt/ (say serfuhs .aktiv .ayjuhnt) noun any substance which when added to a liquid reduces its surface tension and thus increases its spreading or wetting properties. Also, surfactant …  

• surface — n. & v. n. 1 a the outside of a material body. b the area of this. 2 any of the limits terminating a solid. 3 the upper boundary of a liquid or of the ground etc. 4 the outward aspect of anything; what is apparent on a casual view or… …   Useful english dictionary

• Active Directory — (AD) is a directory service created by Microsoft for Windows domain networks. It is included in most Windows Server operating systems. Server computers on which Active Directory is running are called domain controllers. Active Directory serves as …   Wikipedia

• Surface fabricator — In industry, a fabricator is a person or business that frames, shapes, or fashions something. A surface fabricator shapes surfaces. Types For interior spaces, surfaces include solid coverings or decking for floors or walls, and countertops for… …   Wikipedia

• Properties and features of black holes — According to the No Hair theorem a black hole has only three independent physical properties: mass, charge and angular momentum. [citation|last=Heusler |first=M. |year=1998 |title=Stationary Black Holes: Uniqueness and Beyond |journal=Living Rev …   Wikipedia

• Active camouflage — Illustrating the concept, i.e. active capture and re display, creates an illusory transparency , also known as computer mediated reality Active camouflage or adaptive camouflage, is a group of camouflage technologies which allow an object to… …   Wikipedia