1105results about "Oligosaccharides" patented technology

A method of fractionating biomass, by permeability conditioning biomass suspended in a pH adjusted solution of at least one water-based polar solvent to form a conditioned biomass, intimately contacting the pH adjusted solution with at least one non-polar solvent, partitioning to obtain an non-polar solvent solution and a polar biomass solution, and recovering cell and cell derived products from the non-polar solvent solution and polar biomass solution. Products recovered from the above method. A method of operating a renewable and sustainable plant for growing and processing algae.

Lipo-chito oligosaccharides (LCOs) are produced by culturing rhizobacteria cells in or on a culture medium comprising at least one of: jasmonic acid or a derivative thereof; linoleic acid or a derivative thereof; or linolenic acid or a derivative thereof. Preferably, the rhizobacteria cells are Bradyrhizobium japonicum cells having the identifying characteristics of B. japonicum strain USDA 3. Preferably, the derivative of jasmonic acid is an ester thereof, preferably methyl jasmonate. Also provided are methods for improving LCO production at low temperatures, particularly temperatures below 25° C.

PCT No. PCT/AU96/00238 Sec. 371 Date Oct. 28, 1997 Sec. 102(e) Date Oct. 28, 1997 PCT Filed Apr. 24, 1996 PCT Pub. No. WO96/33726 PCT Pub. Date Oct. 31, 1996Sulfated oligosaccharides, wherein the oligosaccharide has the general formula I:R1-(Rx)n-R2(I)wherein R1 and R2 and each Rx represents a monosaccharide unit, all of which may be the same or different, adjacent monosaccharide units being linked by 1->2, 1->3, 1->4 and/or 1->6 glycosidic bonds and n is an integer of from 1 to 6, and use thereof as anti-angiogenic, anti-metastatic and/or anti-inflammatory agents.

The invention discloses a cross-linked polymer of at least one carbohydrate component comprising at least one primary alcohol function in particular for the manufacture of a composition which is intended to be applied onto the skin to obtain a tensing and/or toning effect.

The invention provides arrays of molecules where the molecules (e.g., glycans) are attached to the arrays by cleavable linkers. The invention also provides methods for using these arrays, methods for identifying the structural elements of molecules bound to these arrays by using the cleavable linkers, especially the structural elements that are important for binding to test samples. The invention further provides methods for evaluating whether test samples and test molecules can bind to distinct glycans on the arrays and useful glycans identified using the methods and arrays provided herein.

Compositions which inhibit corrosion and alter the physical properties of concrete (admixtures) are prepared from salt mixtures of hydroxycarboxylic acids, carboxylic acids, and nitric acid. The salt mixtures are prepared by neutralizing acid product mixtures from the oxidation of polyols using nitric acid and oxygen as the oxidizing agents. Nitric acid is removed from the hydroxycarboxylic acids by evaporation and diffusion dialysis.

Carboxymethylgalactose derivatives represented by general formula (1);and salts thereof, which exhibit reactivity to selectins and are useful as inhibitors against selectin-related diseases such as various inflammations and cancerous metastasis; In said formula, R is a group rep resented by formula (1a), (1b) or (1c).

An unbranched polylactosamine comprising at least 6 monosaccharides and having terminal alpha 2->3 sialylation and internal alpha 1->3 fucosylation at various N-acetylglucosamine residues except for solely at the penultimate N-acetylglucosamine residue.

The invention provides compositions and methods for engineering E. coli or other host production bacterial strains to produce fucosylated oligosaccharides, and the use thereof in the prevention or treatment of infection.

Provided are methods for the preparation of glycosylation products, including those represented by formula I:

Sugar-O—R′  I

• • comprising the step of combining R′—OH, a glycosyl sulfide glycosyl donor (“thioglycoside donor”), a hypervalent iodine alkyl-transfer activating reagent, and a base. In an embodiment, the hypervalent iodine alkyl-transfer activating reagent is (phenyl(trifluoroethyl)iodonium triflimide).

One aspect of the present invention relates to an apparatus for the efficient synthesis of oligosaccharides on a solid support, e.g., formed by subunit addition to terminal subunits immobilized on solid-phase particles. In certain embodiments, the apparatus of the present invention is used in combinatorial methods, e.g., as described herein, of synthesizing oligosaccharides.

A process for producing a transgenic plant which accumulates a fructooligosaccharide, comprising the step of transforming a plant with a gene construct comprising a gene encoding β-fructofuranosidase capable of converting sucrose into a fructooligosaccharide, and a transgenic plant produced by the process, are disclosed.

Multiple strains and species of Campylobacter were found to share a common glycan moitie which is present in a plurality of surface-exposed glycoproteins. This glycan has the formula: GalNAc-a1,4-GalNAc-a1,4-[Glc-β1,3]GalNAc-a1,4-GalNAc-a1,4-GalNAc-a1,3-Bac, wherein Bac is 2,4-diacetamido-2,4,6-trideoxy-D-glucopyranose. This glycan and immunologically active fragments of it have use as vaccines against campylobacter infection in humans and animals. As well, antibodies which specifically bind these compounds may be provided. Such antibodies and vaccines may be used to prevent or neutralize campylobacter infections in livestock thereby preventing this pathogen from entering the human food chain. The glycan may be linked to one or more amino acids to form a glycopeptide. As well, a method for determining the glycan structure of an intact glycoprotein consists of subjecting a sample to high resolution magic angle spinning nuclear magnetic resonance (HR-MAS-NMR) spectroscopy.

A ‘bioactive’ composition that has one or more oligogalacturonans ((1→4)-α-D-galacturonan) or any other oligosaccharides (oligoguluronans) that may present an ‘egg box’ conformation, this conformation being further stabilized by one or more polycationic saccharide(s), preferably either a chitosan oligosaccharide or a chitosan polysaccharide. A method prepares this composition and it is used, in medical, pharmaceutical, agricultural, nutraceutical, food, feed, textile, cosmetic, industrial and/or environmental applications.

The invention relates to application of mannuronic acid oligose with carboxyl at a 1-position of a reducing end and a derivative to treatment of a Parkinson's disease. The mannuronic acid oligose and the derivative are particularly a compound or a pharmaceutically acceptable salt expressed by the following structural formula (II) in the description, wherein n in the formula (II) is one or more integers from 0-20.

The present invention relates to methodology for polymer grafting by a polysaccharide synthase and, more particularly, polymer grafting using the hyaluronate or chondroitin or heparin/heparosan synthases from Pasteurella, in order to create a variety of glycosaminoglycan oligosaccharides having a natural or chimeric or hybrid sugar structure with a targeted size that are substantially monodisperse in size. The present invention also relates to methodology for polymer grafting by a polysaccharide synthase to form glycosaminoglycan polymers having an unnatural structure.

The invention discloses a preparation method of high-purity mannan oligosaccharide. The preparation method comprises the steps of 1, producing a mannan oligosaccharide mixture through enzymolysis conversion; 2, carrying out centrifugal separation: separating enzymatic hydrolysate through a centrifugal machine; 3, carrying out ceramic membrane filtration: filtering centrifugate through a ceramic membrane group as precision separation to remove protein, starch and polysaccharide substances; 4, carrying out ion exchange refining: desalting, decoloring and deodorizing filtrate through a mannan oligosaccharide ceramic membrane; 5, carrying out 2000 molecular weight ultrafiltration: ultrafiltering ion exchange refining liquid through a polyether sulfone-polyamide composite membrane with interception as Dalton to obtain a polymerization degree; 6, carrying out nanofiltration: filtering sugar liquid through a ceramic membrane, ion exchange refining and an ultrafiltration membrane; and 7, carrying out spray drying: preheating a nano-filtered concentrated solution, and drying in a spray drying tower. The dried product contains more than 95% of mannan oligosaccharide, and has an obvious function of multiplying bifidobacterium; meanwhile, the product, as a most promising substitute, can reduce harmful bacteria.

Compounds and methods are provided for modulating in vitro and in vivo processes mediated by selectin binding. More specifically, selectin modulators and their use are described, wherein the selectin modulators that modulate (e.g., inhibit or enhance) a selectin-mediated function comprise particular glycomimetics linked to a member of a class of compounds termed BASAs (Benzyl Amino Sulfonic Acids).

The present invention provides algin oligosaccharides having polymerized degree of 2-22 and the derivatives thereof, such algin oligosaccharides are made of mannuronic acid bonded by [proportional to]-1,4 glycosidic bond. The derivatives which the reduced terminal in position-1 is carboxyl radical can be obtained by oxidation. The invention also provides the manufacture of algin oligosaccharides and the derivatives thereof, which includes the alginate solution in water reacts in the reactor under the condition of high press, 100-120 DEG C, pH2-6, for 2-6 hours, after the reaction completed, its pH value was adjusted to 7. The result oligosaccharides are oxidated in presence of the oxidant, and then produces the oxidated products. The algin oligosaccharides and the derivatives thereof of the invention can be used in the manufacture of medicaments for preventing Alzheimer's dementia and diabetes.

Methods for the production of substrate, tuber, and grain compositions containing isomalto-oligosaccharides are described. The methods comprise (a) contacting a substrate, tuber or grain containing ungelatinized starch with a maltogenic enzyme and a starch liquefying enzyme to produce maltose; (b) contacting said maltose with a transglucosidic enzyme, wherein said steps (a) and step (b) occur at a temperature less than or at a starch gelatinization temperature; and (c) obtaining a substrate, grain or tuber composition having an enzymatically produced isomalto-oligosaccharide, wherein the oligosaccharide is derived from the grain. The maltogenic enzyme can be either exogenous or endogenous to the grain. The contacting steps can be sequential or concurrent. The present invention also describes flour, oral rehydrating solutions, beer adjuncts, food, feed, beverage additives incorporating the grain compositions made as described.

Methods are disclosed for increasing the level of soluble C₅ saccharides produced from lignocellulosic biomass comprising acidifying fractionated lignocellulosic biomass to prevent the recondensation of soluble C₅ saccharides, including C₅ oligosaccharides and xylose and arabinose monomers, to insoluble higher molecular weight C₅ oligosaccharides.