... and human physiological activity, in skin, joints, synovial fluid, umbilical cord, aqueous and eye vitreous in distribution. Molecular weight is 500 ... other metal ions and ascorbic acid homocystein, etc, the coexistence of reducing oxygen free radicals, X-ray, gamma rays χ, ... , heating conditions, low molecular, also is a kind of solution of HA non-newton fluid, with good viscoelastic and flow ...