| 词汇 | surfactant |
| 释义 | surfactant noun[ C ] chemistry specializeduk /sɜːˈfæk.tənt/ us /sɝːˈfæk.tənt/ a substance that reduces the surface tension of a liquid (= the natural force existing in a liquid that holds its surface together): 表面活性剂 Surfactants are used, for example, as emulsifiers or in detergents.例如，表面活性剂可用作乳化剂或洗涤剂。 Chemistry: types of chemical acid salt aerogel albumin alkali metal alkaline alkaloid antioxidant carbohydrate homologous series inorganic isopropanol ketone lectin melamine monosaccharide mothball propellant saline soluble sulphide Examples of surfactantsurfactant Early versus delayed selective surfactant treatment for neonatal respiratory distress syndrome. This property results from neglecting the surfactant diffusion. The pediatric cardiologist was unaware which babies had received surfactant. Here, the surfactant is swept to the back of an advancing bubble and accumulates near the rear. In this paper we derive a simple mathematical model describing the flow of micellar surfactant solution beneath a gas-liquid interface. Consequently, when surfactant solution flows beneath a free surface, the fluid dynamics and surface chemistry are, in general, intimately coupled. These variables include surfactant, common radiological investigations, blood product transfusions, surgery, and echocardiography. A candidate might be the variation of agar surface tension along the envelope due to some surfactant secreted by the bacteria. We found only a trace of surfactant in the lumen of alveoli. We finally note here that if surfactants are present, the interface will be tangentially immobile independently of the viscosity ratio. All these models neglect fluid motion and thus surfactant transport by convection. Increased expression of pulmonary surfactant proteins in oxygen-exposed rats. Before we carry out a perturbation analysis of the surfactant equations, we shall examine the momentum equation in the static cap region. There are several mechanisms which determine the distribution of interfacial surfactants. It is becoming more apparent that alveolar epithelial cells have functions other than gas exchange and pulmonary surfactant production. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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