Dynamic Light Scattering Study on the Calf Vitreous Body

摘要

From the observations of the dynamics of light scattered by the calf vitreous body,intensity autocorrelation functions that revealed two diffusion coefficients,D_(fast) and D_(slow),were obtained.We developed the theory for describing the density fluctuation of the entities in the vitreous gel system with Na-hyaluronate polymers filled in the meshes of collagen fiber network.The dynamics of collagen and Na-hyaluronate explains two relaxation modes of the fluctuation.The diffusion coefficient of collagen obtained from D_(fast) and D_(slow) is very close to that in aqueous solution,which suggests the vitreous body is in the swollen state.The diffusion coefficients were found to be dependent on the position (surface or central part) of the vitreous body from which the scattered light sampled.The inhomogeneous distribution of Na-hyaluronate and collagen and the shell structure of the vitreous body were suggested.