54 results about "Ketose" patented technology

The present invention relates to an ophthalmic solution comprising 0.00001 to 10.0 weight percent of a simple saccharide, at least 0.00001 weight percent of a preservative, and not more than about 0.2 percent by weight chloride. The simple saccharide is chosen from the group consisting of: inositol; mannitol; sorbitol; sucrose; dextrose; glycerin; propylene glycol; ribose; triose; tetrose; erythrose; threose; pentose; arabinose; ribulose; xylose; xylulose; lyxose; hexose; allose; altrose; fructose; galactose; glucose; gulose; idose; mannose; sorbose; talose; tagatose; adlose; ketose; heptose; sedoheptulose; monosaccharides; disaccharides; sugar alcohols; xylitol; and polyol.

A method of utilizing the physiological activity of a rare saccharide, wherein physiological-activity sensitive cells are treated with the rare saccharide to modify the function of the cells. A composition containing, as an active ingredient, a rare saccharide which is introduced into physiological-activity sensitive cells and has an effect of modifying the function of the cells. The cells are human cells. The composition is a functional food, a drug, or a cosmetic. The rare saccharide is a rare saccharide belonging to aldose and/or ketose. The aldose is D-allose, and the cells are selected from the group consisting of cancer-cell proliferation inhibitory activity sensitive cells and active-oxygen production inhibitory activity sensitive cells. The ketose is D-psicose, and the cells are selected from the group consisting of chemokine secretion inhibitory activity sensitive cells, microglia migration inhibitory activity sensitive cells, and hypoglycemic activity sensitive cells.

In cultivating a microorganism having nitrile hydratase production ability, by allowing at least one of a ketose, such as fructose, and a sugar alcohol, such as mannitol, to be present, growth inhibition by cobalt ion is prevented, thereby achieving cultivation at a high concentration and with a high activity.

An object of the present invention is to provide a novel ketose 3-epimerase, a process for producing the same, a DNA encoding the enzyme, a recombinant DNA and transformant comprising the DNA, and a process for producing a ketose by using the enzyme. The present invention solves the above objects by providing a ketose 3-epimerase which is obtainable from a microorganism of the genus Rhizobium, a process for producing the same, a DNA encoding the enzyme, a recombinant DNA and transformant comprising the DNA, and a process for converting D- or L-ketohexose into corresponding D- or L-ketohexose by epimerizing the hydroxyl group at the C-3 position of the D- or L-ketohexose; and D- or L-ketopentose into corresponding D- or L-ketopentose by epimerizing the hydroxyl group at the C-3 position of the D- or L-ketopentose; by using the enzyme.

The invention discloses a method for preparing D-allose by reducing ketose by a catalytic hydrogenation process, which comprises the following steps: 1) subjecting the compound of formula (II) to reduction reaction in the presence of a transitional metal catalyst and hydrogen to obtain a compound of a formula III, wherein R1 and R2 are dihydroxyl protective groups; and 2) removing the R1 and R2 protective groups from the compound of the formula III to obtain D-allose. The method has the advantages of high stereoselectivity, high cleanness, convenience for post treatment and the like and is a preparation method suitable for industrial production.

The invention relates to an identification method for a traditional Chinese injection, and particularly relates to a method for determining the content of saccharide components in an ixeri sonhifolia injection by using GC-MS. The method comprises the following steps of (a) preparation of a sample, comprising a pretreatment method of the sample; (b) preparation of a standard substance, comprising a derivatization method of aldose components and a derivatization method of ketose components; (c) chromatographic conditions: a GC-MS analyzer employs a GC-MS-QP2010SE and capillary column is shown in the description; and (d) determination: taking the standard substance and the sample precisely, injecting into a gas chromatograph, determining by gas chromatography, and making a fingerprint spectrum of the saccharide components in the ixeri sonhifolia injection. With the method, the difficultly detectable saccharide components in an ixeri sonhifolia can be detected accurately by adopting the derivatization method.

In the rare sugar strategy of Izumoring (FIG. 1), it is intended to establish a reaction system of producing rare sugars of many types by acquiring an isomerase which acts on various rare aldoses and, therefore, is most efficient in producing various rare ketoses. A DNA encoding the following protein (a) or (b). The above-mentioned DNA which is L-rhamnose isomerase derived from Pseudomonas stutzerii. A protein comprising the amino acid sequence represented by SEQ ID NO:2. A process for producing a recombinant protein characterized by culturing a host cell containing an expression system that can express the above-mentioned protein in a medium and collecting a recombinant protein having an L-rhamnose isomerase activity from the thus obtained culture. A method of applying FIG. 1 to the production of a rare sugar characterized in that the location of a target rare sugar in the overall picture of monosaccharides is understood and thus the optimum production pathway on which the above protein is allowed to act is designed.

The invention discloses a method for synthesizing rare ketohexose and ketoheptose from a raw material of sugar acid lactone, which comprises the following steps of: firstly, reacting the hydroxyl-protected sugar acid lactone with diiodomethane under the action of n-butyl lithium to prolong a carbon chain so as to obtain 1-deoxy iodo-ketose; secondly, in an alkaline environment, performing a hydrolysis reaction to ensure that hydroxyl radicals substitute iodine atoms so as to obtain a ketose intermediate; and finally, performing de-protection on the intermediate to obtain the needed rare ketoses. The method provides a new technical support for preparing the rare ketoses, has easily-available raw materials and simple and convenient operation and processing, is easy to be performed in a laboratory, is expected to realize industrialization, and has a comparatively simple and short process route and a low production cost.

A preparation method of dihydroxyacetone by transforming glycerol relates to a polyhydroxy ketose. Flavobacterium halmsphilum ch20-1 is inoculated into seed culture medium for cultivation. Then seed liquid is added into fermentation medium containing glycerol to perform aerobic fermentation. After NaOH solution feeding and fermentation, dihydroxyacetone is obtained. According to the invention, transforming of cheap material waste glycerol into biobased platform chemical dihydroxyacetone of high added value is accomplished by the use of microorganism and an outlet of effective utilization of waste glycerol is found. The method provided by the invention uses a strain with no hidden danger of biological safety. At the same time, it has a short fermentation time, high productivity, low bacterial culture condition and low production cost.

A saccharide-alkyleneoxy derivative comprising a compound represented by the following formula (1):

A−(EP)n−OH  (1)

wherein A represents a skeleton of a saccharide selected from the group consisting of C₃ to C₃₂ aldoses, ketoses and sugar alcohols; EP represents an ethyleneoxy group and/or a propyleneoxy group; and n represents an average number of the repeating units. Also disclosed are a method for producing the saccharide alkyleneoxy derivative, and an ink containing the saccharide-alkyleneoxy derivative.

The invention relates to a method for purifying seaweed ketose. The method comprises the following steps of: transforming 20% of sucrose solution by utilizing trehalose synthase to generate mixed syrup containing 80% of seaweed ketose; then assimilating sucrose which is not reacted in the mixed syrup, as well as byproducts, namely fructose and glucose by utilizing saccharomyces cerevisiae cells, wherein trehalose is very difficult to be degraded and assimilated by yeast; and further removing the saccharomyces cerevisiae cells in the syrup by utilizing centrifugation to get a seaweed ketose solution with single sugar component. According to the purification method, the recovery rate of the seaweed ketose can achieve 95%; and as for the seaweed ketose with the single sugar component, the syrup can be further concentrated, desalted and refined to produce the high-purity seaweed ketose.

The invention discloses a preparation method of high-oil-loading microcapsule powder without adding a synthetic emulsifier. Vegetable protein or animal protein is used as a protein raw material, a protein dispersion solution is prepared, after protein denaturation is promoted through primary heat treatment, ketose or aldose is added, wet-method Maillard reaction is promoted through secondary heat treatment, and a pre-prepared wall material solution is generated. Grease is added, and the balance is supplemented with the micromolecular filler. And carrying out vacuum degassing, high-speed homogenization, high-pressure homogenization, UHT sterilization, spray drying and other processes to produce the high-oil-loading microcapsule powder. The microcapsule powder is high in oil carrying rate, high in embedding rate and good in dispersity, and no synthetic emulsifier is added in the microcapsule preparation process.