摘要:
A process is disclosed for conversion of monosaccharides, disaccharides and trisaccharides into aldonic acids by means of dehydrogenase enzyme containing cells without a hydrogen acceptor and without the nutrients and conditions necessary for cell growth. High purity maltobionic and lactobionic acids may be formed thereby during the manufacturing process of the disaccharide. Glucose, maltose and maltotriose in starch syrups of varying compositions may also be so converted to their corresponding aldonic acids.
摘要:
The present invention concerns an efficient way to isolate L-fucose from a fermentation broth. The L-fucose contained in the fermentation broth is produced by microbial fermentation (bacterial or yeasts). The inventive process comprises a step of removing biomass from the fermentation broth, a step of subjecting the resulting solution to at least one of a cationic ion exchanger treatment and an anionic ion exchanger treatment and a step of removing salts after the ion exchanger treatment. The process can provide L-fucose in powder form, in granulated form as well as in form of L-fucose crystals.
摘要:
The present invention describes an efficient way to isolate a sialic acid from a fermentation broth. The sialic acid contained in the fermentation broth is produced by bacterial fermentation. The inventive process comprises a step of removing biomass from the fermentation broth, a step of subjecting the resulting solution to at least one of a cationic ion exchanger treatment and an anionic ion exchanger treatment and a step of removing salts after the ion exchanger treatment. The process can provide the sialic acid in spray-dried form as well as in form of sialic acid crystals.
摘要:
Described herein are fatty acid carbohydrate-hydroxyl-hybrid compounds and derivatives thereof, and methods of treating or preventing disease and disease symptoms using the compounds and compositions thereof.
摘要:
Disclosed is an efficient and economical method for the preparation of N-glycolyl neuraminic acid in a high purity from an inexpensive abundant source material. The method comprises dispersing body tissues of an echinodermatous marine animal Cucumaria echinata in an aqueous medium, preferably, using a dry powder of the tissues prepared in advance, in which the tissues are proteolytically decomposed to isolate N-glycolyl neuraminic acid in the form of an aqueous solution containing polypeptides as a by-product, followed by separation of N-glycolyl neuraminic acid from the aqueous solution by removing the polypeptides and purification of the compound in a process utilizing an ion-exchange treatments.