Definition of surface-active in English:


Pronunciation /ˈsərfəsˌaktiv/ /ˈsərfəsˌæktɪv/


  • (of a substance, such as a detergent) tending to reduce the surface tension of a liquid in which it is dissolved.

    ‘some preservatives are inactivated by nonionic surface-active agents’
    • ‘This will then allow observing directly the structure-function relationship of pulmonary surfactant and any other surface-active substance.’
    • ‘An important case of adsorption on liquid surfaces is that of surface-active or surfactant molecules at the water-air or water-oil interface.’
    • ‘The method might also prove highly valuable for the investigation of surface-active substances other than pulmonary surfactant.’
    • ‘To weaken the surface of the emulsion droplets and reduce stability, extra emulsifiers such as mono- and diglycerides (small molecule surface-active agents) are added to the emulsion.’
    • ‘Normal pulmonary function requires the presence of a surface-active material at the air/liquid interface of the alveolar hypophase.’
    • ‘On the other hand, a haphazard increase in surface tension or selection of a surface-active material with undesirable biological effects could have dangerous consequences.’
    • ‘It has been shown that such interdigitated lamellar phases are formed with soluble surface-active molecules that interact with the polar headgroups of the lipids.’
    • ‘If surface tension does contribute significantly, surface-active agents designed to safely and favorably modulate surface tension might be used to increase recoil in emphysema.’
    • ‘For example, changes induced in the capacitance relaxation parameters have been used to help characterize the interaction of surface-active molecules with bilayers.’
    • ‘Upon separation, the surfactants lose all surface-active behavior.’
    • ‘Our isotherm results demonstrate that P188 is a highly surface-active copolymer.’
    • ‘The presence of a minimum is commonly attributed to surface-active impurities.’
    • ‘Such specific interactions may lead to formation of highly surface-active lipid-protein complexes as well as sorting of lipids at the lung air-water interface.’
    • ‘However, the mechanisms promoting transformation of these compact particles into surface-active components is still poorly understood.’
    • ‘These aerosol particles are mainly comprised of organic matter, produced by plankton and are concentrated at the ocean surface due to its surface-active properties.’
    cleaning, cleansing