Polydisperse and charged polysaccharides are fractionated into low polydispersity fractions (preferably having pd<1.1), each containing species within a narrow range of molecular weights. An aqueous solution of the polydisperse polysaccharides is contacted with an ion exchange resin in a column and the polysaccharides are subjected to selective elution by aqueous elution buffer. The selective elution consists of at least 3 sequential elution buffers having different and constant ionic strength and/or pH and in which the subsequent buffers have ionic strength and/or pH than those of the preceding step. The new preparations are particularly suitable for the production of PSA-derivatised therapeutic agents intended for use in humans and animals.

The present invention relates to compositions comprising fractionated alkylated cyclodextrm compositions having a single degree of substitution, and processes for preparing and using the same.

The present invention relates, in its broadest aspects, to steroidal glycosides useful in the treatment of skin disorders. Particularly, the invention relates to the use of certain steroidal glucosides, per se, or in the form aglycona, derivatives of spirostanol, of its precursor furastanol, or mixtures thereof, used in the treatment of skin disorders, for instance, psoriasis. The invention further relates to formulations containing steroidal glycosides, the process of obtaining extract from the Furcraea foetida plant, and a method of treating skin disorders.

A composition includes a target pharmaceutical or biological agent, a solution containing the target pharmaceutical or biological agent, and substrate that is soluble in the solution. The substrate is capable of being solidified via a solidification process and the solidification process causes the substrate to become physically or chemically cross-linked, vitrified, or crystallized. As a result of the solidification process, particles are formed. The target pharmaceutical or biological agent within the solution retains proper conformation to ultimately produce a desired effect.

The invention is in the field of vaccines and relates to oligomers having a selected degree of polymerization, obtained by connecting together a number of carbocyclic repeating units, and to conjugated derivatives thereof. The oligomers and conjugated derivatives thereof of the invention also have a selected degree of acetylation. The derivatives of the invention are useful for the preparation of immunogenic compositions, e.g. in the form of a vaccine.

The disclosure generally relates to poly alpha-1,3-glucan compositions and articles containing them. In particular interest is comprising poly alpha-1,3-glucan ester derivatives. The poly alpha-1,3-glucan derivatives are useful in thermoprocesses and in particular, injection molding processes.

A Dendrobium officinale oligosaccharide, a Dendrobium officinale oligosaccharide derivative and a preparation method and use thereof. The Dendrobium officinale oligosaccharide includes 3-9 glycoside residues and a glucose residue at a non-reducing end; the derivative thereof is obtained by substituting with a hydrophobic residue at the non-reducing end; the preparation method and use of both are also provided.

The invention relates to a product for use in the therapeutic or prophylactic treatment of infections, said treatment comprising oral administration of the product, wherein the product is selected from a nutritional formulation, a food product, a dietary supplement, a beverage and a pharmaceutical product, said product containing carrot RG-I polysaccharides having the following combination features: a molecular weight in the range 10-300 kDa; a backbone consisting of galacturonic acid residues and rhamnose residues, said rhamnose residues being contained in alpha(1.fwdarw.4)-galacturonic-alpha(1.fwdarw.2)-rhamnose residues; the following monosaccharide composition: 20-60 mol. % galacturonic acid residues, wherein the individual galacturonic acids can be methylated and/or acetyl-esterified; 8-50 mol. % rhamnose residues; 0-40 mol. % arabinose residues; 0-40 mol. % galactose residues; molar ratio of galacturonic acid residues to rhamnose residues in the range of 5:1 to 1:1; galacturonic acid residues, rhamnose residues, arabinose residues and galactose residues together constitute at least 85 mol. % of the monosaccharide residues in the carrot RG-I polysaccharides. These carrot RG-I polysaccharides can be produced by partially hydrolysing pectic polysaccharides present in a carrot pectin isolate. The effectiveness of carrot RG-I polysaccharides against infections is substantially improved by enzymatically hydrolysing the RG-I polysaccharides to remove at least part of the homogalacturonan component.

The present disclosure provides a heteropoly oligosaccharide and an application thereof in improving plant disease resistance. The heteropoly oligosaccharide includes seven D-glucose residues and one D-galactose residue. Each heteropoly oligosaccharide molecule comprises R.sub.1 and R.sub.2, R.sub.1 being H or a monomolecular pyruvate group, R.sub.2 being H or a monomolecular succinyl group, and the structure thereof is represented as follows:

A preparation of a homogeneous polysaccharide from a Radix Puerariae aqueous extract is provided and the lipid-lowering activity of the polysaccharide is studied. It is proved through in vivo experiments that the homogeneous polysaccharide QL extracted from Radix Puerariae (a genuine medicinal material in Jiangxi Province) in the present disclosure has significant lipid-lowering activity, can significantly reduce a serum triglyceride content and a liver index, and can be used to develop a potential safe and effective lipid-lowering drug.