Structural models and surface equation of state for pulmonary surfactant monolayers.

Structural models and surface equation of state for pulmonary surfactant monolayers. Research Abstract Details 

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Structural models and surface equation of state for pulmonary surfactant monolayers. Abstract Text:

Zuoxiang Zeng,Dan Li,Weilan Xue,Li Sun,Zuoxiang Zeng,Dan Li,Weilan Xue,Li Sun,Zuoxiang Zeng,Dan Li,Weilan Xue,Li Sun,

A simple surface equation of state is proposed to describe pi-A isotherms of pulmonary surfactant monolayers. The monolayer is considered as undergoing three characteristic states during the compression: the disordered liquid-expanded (LE) state, the ordered liquid-condensed (LC) state and the collapse state. Structural models of pure protein (SP-B and SP-C) monolayer are proposed to interpret the behavior characteristics of monolayer in the states. The area, ALC, is defined as an instantaneous LC-state area when the monolayer is under the complete LC state. The area, At, is defined as a transition area from the ordered LC state to the collapse state. And the collapse pressure, pi(max), is defined as the maximum surface pressure that the monolayer can bear before collapse. The ideal equation of state is revised by ALC, At and pi(max), and a new equation of state is obtained, which is applicable for pure components of pulmonary surfactant. The theoretical pi-A isotherms described by the equation of state are compared with the experimental ones for SP-B, SP-C, DPPC and DPPG, and good agreements are obtained. The equation of state is generalized to protein-lipid binary mixtures by introducing mixing rules. The predicted pi-A isotherms agree with the experimental ones for various pulmonary surfactant components and the average deviation is about 9.2%.

Structural models and surface equation of state for pulmonary surfactant monolayers. Publishing Authors By Initials

Z Zeng,D Li,W Xue,L Sun,Z Zeng,D Li,W Xue,L Sun,Z Zeng,D Li,W Xue,L Sun,

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Structural models and surface equation of state for pulmonary surfactant monolayers. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Biophysical chemistry

VOLUME: 131

Page Numbers: 88-95

Journal Abbreviation: Biophys. Chem.

ISSN: 0301-4622

DAY: 20

MONTH: 09

YEAR: 2007

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LANGUAGE: eng

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Grant and Affiliation Information for Structural models and surface equation of state for pulmonary surfactant monolayers.

AFFILIATION: Chemical Engineering Institute, East China University of Science and Technology, Shanghai, China. zengzx@ecust.edu.cn

Country: Netherlands

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MEDLINETA: Biophys Chem

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