Viscosity and inertia-limited rupture of dextran-supported black lipid membranes

Article Abstract:

The rupture of dextran-supported black lipid membranes was investigated. This was done by examining the irreversible rupture of membranes triggered by the application of short transmembrane voltage pulses. An evaluation of the kinetics of defect widening showed that the linear increase of membrane conductance during rupture was partly determined by the inertia of the black lipid membranes. The transition from viscosity-to inertia-dominated rupture was observed to be linked to the density of the hydrophobic anchor groups along the polymer chain of dextran derivatives.

Polymers, Viscosity, Inertia (Mechanics)

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Interaction of wedge-shaped proteins in flat bilayer membranes

Article Abstract:

Monte Carlo simulations of the interaction between cone-shaped proteins and flat bilayer membranes were reviewed. Proteins exhibiting parallel and antiparallel orientations were examined. The Monte Carlo simulation method was applied on a model of lipid-bilayer membrane at air-water interface. Two types of attraction forces were observed. These were the depletion-induced attraction and the fluctuation-induced attraction. The data suggests that the fluctuation type interaction was dependent on the lipid model.

Proteins, Reactivity (Chemistry)

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Investigation of lipid organization in biological membranes by two-dimensional nuclear Overhauser enhancement spectroscopy

Article Abstract:

Research was conducted to examine lipid organization in biological membranes using two-dimensional nuclear Overhauser enhancement spectroscopy 1H NMR spectra recorded with magic-angle spinning. The cross-relaxation rates between all the lipid resonances were quantitatively analyzed and the amount of intermolecular contributions to cross-relaxation were determined. Results indicate that the interactions between lipid protons are intermolecular.

Membranes (Biology), Overhauser effect (Nuclear physics)

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