It relates the diffusion coefficient (D) of a particle to its radius (r), the fluid's viscosity (η), and the absolute temperature (T). The equation is given by: The particles are spherical and much ...

This allows the investigators to estimate the particle diffusion coefficient — a larger coefficient denotes faster diffusion and, hence, more rapid penetration of particles through the mucus gel.

For particle drift to occur, the mass transport should not be rate-limiting, and various factors, such as pH, aqueous solubility, membrane diffusion coefficients, and partition coefficients ...