摘要:
A surfactant containing at least one trehalose-6-fatty acid ester represented by general formula (I) (wherein R represents C8-C22 (un)saturated acyl which may be substituted by OH, etc.) and excellent in surface activity and safety; an emulsion cosmetic containing the surfactant and a water-soluble polymer, excellent in prolonged storage stability and organoleptic characteristics, and reduced in skin stimulation, and having a beautiful appearance with a fine texture; and a liposome having a membrane wall comprising the trehalose ester and being excellent in physical and chemical stabilities such as prolonged preservability.
摘要:
Materials which contain polysaccharide chains, particularly alginate or modified alginate chains. The polysaccharide chains may be included as side chains or auxiliary chains from a backbone polymer chain, which may also be a polysaccharide. Further, the polysaccharide chains may be cross-linked between side chains, auxiliary chains and/or backbone chains. These materials and non-modified or otherwise modified alginate materials are advantageously modified by covalent bonding thereto of a biologically active molecule for cell adhesion or other cellular interaction. Processes for preparation of these alginate materials and methods for using them, particularly for cell transplantation and tissue engineering applications.
摘要:
A number of triterpene saponin variants with different modifications on their central glycosyl ester linkage are described. Also described are methods of making and method of using such triterpene saponin variants.
摘要:
A separating agent for an optical isomer which comprises an alicyclic ester derivative or a polysaccharide having no aromatic group as an effective component. The separating agent has no great UV absorption as demonstrated by that by an aromatic group, and exhibits high capability for the identification of asymmetry, in particular that in an aqueous mobile phase.
摘要:
The invention concerns a novel method for preparing by chemical process functionalised β-(1,3)-glucan derivatives, enabling to obtain free oligosaccharides or comprising specific groups such as, for instance, sulphate, phosphate, methyl, in predetermined positions. Said method consists in reacting a glycosyl donor of formula (Ia) or (Ib) with a glycosyl scavenger of formula (II), as defined in the claims. The invention is useful for preparing biologically active principles for use in the agricultural, cosmetic or pharmaceutical field.