Rice glycogen and a process for producing the same

摘要

The invention relates to plant glycogen which is polysaccharides being derived from rice and containing a high molecular weight group whose weight average molecular weight is 5.00 to 7.60 millions and a low molecular weight group whose weight average molecular weight is 0.30 to 1.10 millions, said glycogen consisting essentially of a glucose polymer, being easily dissolved in cold water and hot water, and being rendered viscous when water in an amount of 25 to 200 % is added, as well as to a process for producing said plant glycogen, which comprises immersing finely ground rice in water or a water-containing solvent, subjecting it to a solid-liquid separation to give an extract, heating it to remove thermally precipitated solids and proteins, adding the resulting liquid layer to an organic solvent, and recovering the resulting white precipitates, followed by purification if necessary.