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Molecular Diffusion in Plasma Membranes of Primary Lymphocytes Measured by Fluorescence Correlation Spectroscopy

Molecular Diffusion in Plasma Membranes of Primary Lymphocytes Measured by Fluorescence Correlation Spectroscopy

Published on: February 1, 2017

Diffusion in a time-dependent external field.

S A Trigger¹, G J F van Heijst, O F Petrov

¹Joint Institute for High Temperatures, Russian Academy of Sciences, 13/19, Izhorskaia Strasse, Moscow 127412, Russia. strig@gmx.net

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|March 21, 2008

Summary

This summary is machine-generated.

This study examines diffusion in time-dependent fields using a generalized master equation. It validates a phenomenological approach for particle diffusion, including those with rest periods.

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Area of Science:

Physics
Statistical Mechanics
Non-equilibrium Systems

Background:

Diffusion in time-dependent and inhomogeneous external fields presents significant theoretical challenges.
Existing models often struggle to accurately capture complex diffusion dynamics.

Purpose of the Study:

To analyze diffusion in time-dependent external fields using a generalized master equation.
To validate a phenomenological approach for diffusion processes.

Main Methods:

Utilizing a generalized master equation with two times.
Applying the quasi-Fokker-Planck approximation for diffusion analysis.
Comparing results with hydrodynamic and kinetic equations.

Main Results:

The quasi-Fokker-Planck approximation is suitable for diffusion without long tails in coordinate space.
A novel "collision" integral effectively describes diffusion of particles with rest periods.
The phenomenological approach is confirmed by solutions of kinetic equations.

Conclusions:

The generalized master equation provides a robust framework for studying diffusion in complex fields.
The phenomenological approach is validated for describing particle diffusion, including systems with intermittent motion.