| 摘要 |
PURPOSE:The titled additive, obtained by neutralizing a mucilaginous substance extracted from a finely cut cartilage of a shellfish or animal with an alkaline solution containing a neutral salt, deproteinizing the neutralized mucilaginous substance, and subjecting the deproteinized mucilaginous substance to the alcoholic precipitation method, and useful as a base material for cosmetics, food or component in a medical lubricant. CONSTITUTION:A catilage of a shellfish or animal is finely cut or further a freeze-dried material containing the same is extracted with an alkaline solution containing a neutral salt, e.g. 2-3% NaOH solution containing 1-3% NaCl, and the resultant extracted mucilaginous substance is then neutralized with an acidic solution. The neutralized solution is deproteinized and subjected to the alcoholic precipitation method to give a powdery mucopolysaccharide or an enzyme is reacted with the above-mentioned neutralized solution, digested, deproteinized and dialyzed to afford an extract with a high mucopolysaccharide content. The above-mentioned mucopolysaccharide as a humectant is incorporated with a base material for cosmetics and as an excipient for imparting the viscosity increasing property to a food is incorporated therewith and further as a protectant for the gastric mucous membranes is used for a lubricant for human mucous membranes coated on the outer surface of urilogical catheter, etc. |
