منابع مشابه
Critical shape transitions of monolayer lipid domains.
Fluorescence microscopy can be used to visualize coexisting fluid phases in lipid monolayers composed of cholesterol and dipalmitoyl phosphatidylcholine under specified conditions of temperature, composition, and lateral pressure. At a critical composition of approximately 30 mol% cholesterol, decreasing the average molecular area below a(c) [unk]50 A(2) per molecule forces the binary mixture t...
متن کاملPeriodic structures in lipid monolayer phase transitions.
Periodic patterns are observed when supported lipid monolayers doped with low concentrations of fluorescent lipid probes are observed with epi-fluorescence microscopy. Monolayers of dipalmitoyl phosphatidylcholine were examined on air-water interfaces and also on alkylated glass coverslips. The patterns are formed by periodic arrays of solid-phase lipid domains in equilibrium with fluid-phase l...
متن کاملTilt modulus of a lipid monolayer.
In addition to the familiar bending and stretching deformations, lipid monolayers and bilayers in their disordered state are often subjected to tilt deformations, occurring for instance in structural rearrangements accompanying membrane fusion, or upon insertion of "oblique" hydrophobic proteins into lipid bilayers. We study the elastic response of a flat lipid monolayer to a tilt deformation, ...
متن کاملThe molecular mechanism of lipid monolayer collapse.
Lipid monolayers at an air-water interface can be compressed laterally and reach high surface density. Beyond a certain threshold, they become unstable and collapse. Lipid monolayer collapse plays an important role in the regulation of surface tension at the air-liquid interface in the lungs. Although the structures of lipid aggregates formed upon collapse can be characterized experimentally, t...
متن کاملAnomalously fast kinetics of lipid monolayer buckling.
We reexamine previous observations of folding kinetics of compressed lipid monolayers in light of the accepted mechanical buckling mechanism recently proposed by L. Pocivavsek et al. [Science 320, 912 (2008)]. Using simple models, we set conservative limits on (a) the energy released in the mechanical buckling process and (b) the kinetic energy entailed by the observed folding motion. These lim...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1995
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.92.19.8823