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Surface Tension at the Liquid-Gas Interface (Surface Tension)
- Target
- Surface Tension
- Molecular classification
- Physical Property
01
Overview
Surface tension at the liquid-gas interface is the force per unit length acting at the boundary between a liquid and a gas. It arises from cohesive forces among liquid molecules and is crucial for phenomena like droplet formation and capillary action. In biological systems, pulmonary surfactant reduces surface tension in the lungs, preventing alveolar collapse. It is characterized by units of mN/m or dyn/cm, with water having a typical value of 71-73 mN/m. Pulmonary surfactants reduce this value to ~25-30 mN/m in the lungs. Measurement methods include the Wilhelmy plate and Du Noüy ring.
- Other names
- Liquid-Gas Surface TensionInterfacial TensionCapillary Action
02
Mechanism of action
Reducing surface tension at the air-liquid interface in the alveoli.
03
Biological functions
Plays a role in alveolar functionInfluences droplet formationMediates capillary action
04
Disease associations
Respiratory Distress Syndrome (RDS)Acute Respiratory Distress Syndrome (ARDS)
05
Interacting drugs
Pulmonary Surfactants (e.g., Beractant, Poractant alfa)
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