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.

The invention relates to methods of producing, and compositions comprising, an isolated alpha (2.fwdarw.8) or (2.fwdarw.9) oligosialic acid derivative bearing a non-reducing end enriched for one or more de-N-acetyl residues and resistant to degradation by exoneuraminidase. A representative production method involves: (i) treating an alpha (2.fwdarw.8) or (2.fwdarw.9) oligosialic acid precursor having a reducing end and a non-reducing end with sodium borohydride under conditions for de-N-acetylating the non-reducing end; and (ii) isolating alpha (2.fwdarw.8) or (2.fwdarw.9) oligosialic acid derivative having one or more de-N-acetylated residues and a non-reducing end that is resistant to degradation by exoneuraminidase. Isolated alpha (2.fwdarw.8) or (2.fwdarw.9) oligosialic acid derivatives that comprise a non-reducing end de-N-acetyl residue are provided, as well as antibodies specific for the derivatives, compositions comprising the derivatives, kits, and methods of use including protection against and detection of E. coli K1 and N. meningitidis bacterial infection, and in diagnosing and treating cancer.

The invention relates to methods of producing, and compositions comprising, an isolated alpha (2.fwdarw.8) or (2.fwdarw.9) oligosialic acid derivative bearing a non-reducing end enriched for one or more de-N-acetyl residues and resistant to degradation by exoneuraminidase. A representative production method involves: (i) treating an alpha (2.fwdarw.8) or (2.fwdarw.9) oligosialic acid precursor having a reducing end and a non-reducing end with sodium borohydride under conditions for de-N-acetylating the non-reducing end; and (ii) isolating alpha (2.fwdarw.8) or (2.fwdarw.9) oligosialic acid derivative having one or more de-N-acetylated residues and a non-reducing end that is resistant to degradation by exoneuraminidase. Isolated alpha (2.fwdarw.8) or (2.fwdarw.9) oligosialic acid derivatives that comprise a non-reducing end de-N-acetyl residue are provided, as well as antibodies specific for the derivatives, compositions comprising the derivatives, kits, and methods of use including protection against and detection of E. coli K1 and N. meningitidis bacterial infection, and in diagnosing and treating cancer.

A method for the manufacture an infant formula or an infant nutritional product comprising mixture of human milk oligosaccharides is disclosed. The method involves the catalytic hydrogenolysis of compounds of the general formula 1 and 2 with particular oligosaccharide profiles.

A method for the manufacture an infant formula or an infant nutritional product comprising mixture of human milk oligosaccharides is disclosed. The method involves the catalytic hydrogenolysis of compounds of the general formula 1 and 2 with particular oligosaccharide profiles.

The present invention provides sialic acid analogs and their compositions useful for the treatment of sialic acid deficiencies.

The present invention provides sialic acid analogs and their compositions useful for the treatment of sialic acid deficiencies.

A method of producing sialyloligosaccharides a sialyloligosaccharides-containing source that also contains carbohydrates and minerals. The process includes subjecting the source to a temperature of from about 67 C. and (i) filtration with a heat-resistant filter at a temperature of about 35 to about 95 C. to produce a first retentate and first permeate, or (ii) centrifugal separation to produce a light phase and a heavy phase and filtration of the light phase at a temperature of about 50 to about 70 C. to produce a first retentate and first permeate, (b) nanofiltration of the first permeate, or nanofiltration and diafiltration of the first permeate, to produce a second retentate and second permeate, and (c) concentration of the second retentate, to produce a sialyloligosaccharide-containing extract. Additionally, the invention relates to a sialyloligosaccharide-enriched composition comprising at least 3-sialyllactose and 6-sialyllactose and its use in, for example, nutritional and infant formulas, and for maintaining or improving cognitive function.

An object of the present invention is to provide a crystal of 3-sialyllactose (hereinafter, referred to as 3SL), which is easily handled, and has high storage stability at normal temperature as well as under high temperature conditions, and provide a process for producing the same. The present invention relates to a 3SL sodium salt n-hydrate (wherein n represents any number of 0 to 9, and when n is 0, it is referred to as 3SL sodium salt anhydrate) and a process for producing the same.

The present invention provides sialic acid analogs and their compositions useful for the treatment of sialic acid deficiencies.