| 摘要 |
A process for the isolation of a low molecular weight aminoglycan compound of formula I from a natural source of waste egg shells which is made up of alternating glucuronic acid and N-acetyl glucosamine units, wherein M may be at one or more instances Na, Ca, K, Mg; and n is an integer between 20 and 40 said process comprising the steps of: (a) pre-preparation of the waste egg shells for extraction of the embryonic low molecular weight aminoglycan compound of formula I using a polar organic solvent in water, (b) extraction of the low molecular weight aminoglycan compound of formula I as its water soluble salt using an aqueous polar salt solution, (c) isolation of a purified low molecular weight aminoglycan compound of formula I by gel formation out of the aqueous salt mixture by using a polar organic solvent followed by filtration or centrifuging, (d) stabilization of the isolated aminoglycan extract by sequential introduction of organic oils into a semi-dried gel to form aminoglycan compound of formula I . |
