Structural Effects of Cation Binding to DPPC Monolayers

Influence of Silica Nanoparticles on Thermodynamic and Structural Properties of DPPC – Palmitic Acid Langmuir Monolayers

Isotherms of Dipalmitoylphosphatidylcholine (DPPC) Monolayers: Features Revealed and Features Obscured

Valuable as they are, isotherms may display features that Pressure–area isotherms of dipalmitoylphosphatidylcholine are difficult to interpret, or may even be featureless under (DPPC) exhibit a two-phase region wherein domains of a liquidconditions where interesting things are happening. For examcondensed (LC) phase are dispersed in the less ordered liquidple, the nonhorizontal nature of the pl...

Phase behavior of lipid monolayers containing DPPC and cholesterol analogs.

We investigate the miscibility phase behavior of lipid monolayers containing a wide variety of sterols. Six of the sterols satisfy a definition from an earlier study of "membrane-active sterols" in bilayers (cholesterol, epicholesterol, lathosterol, dihydrocholesterol, ergosterol, and desmosterol), and six do not (25-hydroxycholesterol, lanosterol, androstenolone, coprostanol, cholestane, and c...

Interaction of DPPC monolayers with soluble surfactants: electrostatic effects of membrane perturbants.

We studied the effects of four soluble surfactants on DPPC monolayers to elucidate the action of these membrane perturbants. The presence of nonionic N-9 and amphoteric C31G strongly affected the pure DPPC isotherm, while anionic SDS and cationic DTAB had little effect. The impact of surfactant on DPPC domain shape in the liquid condensed-liquid expanded coexistence region showed the opposite r...

Reduced Condensing and Ordering Effects by 7-Ketocholesterol and 5β,6β-Epoxycholesterol on DPPC Monolayers.

The exposure of organic-coated marine aerosols containing cholesterol (Chol) to radiation and/or an oxidizing atmosphere results in the formation of oxidized derivatives or oxysterols and will likely change aerosol surface properties. However, the intermolecular interactions between oxysterols and other lipid components and their influence on the surface properties of marine aerosols are not we...