741 results about "Glucic acid" patented technology

The present invention relates to a polysaccharide having functional groups, wherein said groups are aldehyde groups formed at positions C2 and/or C3 as well as at position C6 of the anhydroglucose units of the polysaccharide chain. Preferably the polysaccharide is a cellulosic fibrous material whose primary and secondary hydroxyl groups of the cellulose are oxidized into aldehyde groups at least in part by means of TEMPO oxidation and periodate oxidation.The invention also concerns a paper or nonwoven comprising the above polysaccharide. According to the invention a relative wet strength of more than 10% can be achieved.

The invention relates to a composite probiotics feed additive containing lactic acid bacteria. The composite probiotics feed additive is prepared by spraying, freezing, drying and compounding 40-60% of lactobacillus acidophilus, 15-20% of lactobacillus amylophilus, 5-10% of lactobacillus salivarius, 5-10% of streptococcus thermophilus, 5-10% of bacteroides thetaiotaomicron and 5-10% of glucose. All strains are separated from pig intestines chime. With the consideration of each part of an intestinal canal of animal, the lactic acid bacteria which produce lactic acid of the front section of the intestinal canal are combined with the bacteroides thetaiotaomicron which dissolve cellulose and polysaccharide of the rear section of the intestinal canal, the proportion among the bacteria is similar to the composition of corresponding bacteria in the intestinal canal of a healthy animal, so that the respective advantages can be developed well, the health of the animal is improved further, the feed digestibility is improved, and the production performance of the animal is improved.

The invention discloses a micro capsule of lactic acid bacteria and its preparation, wherein the micro capsule includes a core material of lactic acid bacterium particles, the bolus making auxiliary material being one or more selected from cane sugar, maltose dextrin, crystalline cellulose, maize starch, glucose or protein sugar, and the wall material comprises sodium acetylide and CaCl2, carrageenan, soybean separated albumen powder, and water-insoluble plant oil.

Antimicrobial compositions are provided that include a hydroalcoholic solvent system comprising a lower C₂-C₅ alcohol and water; a cationic antimicrobial agent such as chlorhexidine gluconate; a fatty component containing at least one free hydroxyl group, such as a C₁₂-C₂₁ fatty alcohol, a C₁₂-C₂₁ fatty ester, a C₁₂-C₂₁ fatty ether, a C₁₂-C₂₁ fatty amide, and combinations thereof; and optionally an emollient ester such as diesters of bibasic acids and triesters of citric acid. The compositions described herein display improved antimicrobial efficacy and improved cosmetic elegance.

The present invention has objects to provide an extract powder of indigo plant, which has a relatively low hygroscopicity, satisfactory fluidability, and improved storage stability; a process thereof; and a composition incorporated with the extract powder. The objects are solved by a process for producing an extract powder of indigo plant, which comprises incorporating a partial starch hydrolyzate with a dextrose equivalent of 10.2 or lower into one part by weight, on a dry solid basis, of an indigo plant extract contained in a liquid extract of indigo plant in an amount of not lower than 0.25 part by weight but not higher than 5 parts by weight, on a dry solid basis, and drying the resulting mixture; an extract powder of indigo plant prepared thereby; and a composition incorporated with the extract powder.

The invention discloses novel N-acetylneuraminic acid-producing escherichia coli engineering bacteria as well as a construction method and application thereof. The engineering bacterial is constructed by introducing an encoded 6-glucosamine phosphate acetylase gene, an N-acetyl glucosamine-2-isomerase gene and an N-acetylneuraminic acid synthetase gene into escherichia coli to express, carrying out strengthened expression on 6-glucosamine phosphate deaminase gene contained in the escherichia coli per se and knocking off genes, for decomposing and utilizing enzyme in metabolic pathways, of the N-acetylneuraminic acid in the engineering bacteria. The engineering bacteria disclosed by the invention can be used for fermentation culture to synthesize the N-acetylneuraminic acid by using glucose or glycerinum as a substrate.

The invention discloses a method for increasing enzymolysis efficiency of rice straws through choline and amino acid ionic liquid pretreatment, which comprises the following steps: firstly, performing pretreatment on the rice straws at certain temperature for a certain period of time by taking choline and amino acid ionic liquid as a solvent; then filtering and separating to obtain residues; drying the residues to obtain the pretreated rice straws. The residues of the rice straws are used as substrates, and enzymolysis is performed on the substrates by utilizing cellulase and xylanase to finally obtain sugar liquor taking glucose and xylose as main components. The method for increasing the enzymolysis efficiency of the rice straws through the choline and amino acid ionic liquid pretreatment not only is capable of effectively increasing the enzymolysis efficiency of the rice straws and increasing the yield of reducing sugar (the glucose and the xylose) which can be fermented, but also is capable of overcoming the defects that a traditional ionic liquid pretreatment process environment is not friendly and the like.

Antimicrobial compositions are provided that include a hydroalcoholic solvent system comprising a lower C₂-C₅ alcohol and water; a cationic antimicrobial agent such as chlorhexidine gluconate; a hydrophobic polymer soluble in the lower alcohol; an emollient ester such as diesters of bibasic acids and triesters of citric acid; and an optional fatty component containing at least one free hydroxyl group, such as a C₁₂-C₂₁ fatty alcohol, a C₁₂-C₂₁ fatty ester, a C₁₂-C₂₁ fatty ether, a C₁₂-C₂₁ fatty amide, and combinations thereof. The compositions described herein display improved antimicrobial efficacy and improved cosmetic elegance.

The invention discloses a bacterial cellulose compound cuprous oxide antimicrobial dressing and a preparation method thereof. The bacterial cellulose compound cuprous oxide antimicrobial dressing lies in that cuprous oxide particles are adhered into a three-dimensional porous network structure of a bacterial cellulose hydrogel film, the cuprous oxide particles are of octahedral crystal forms, and the antimicrobial dressing is obtained by soaking a bacterial cellulose hydrogel film containing a glucose solution into a NaOH water solution and copper ion water solution mixed solution and heating and pressurizing for reaction. The bacterial cellulose compound cuprous oxide antimicrobial dressing is simple and convenient in preparation process and low in cost, has not only excellent bacteria resistance but also the advantages of high water content, good air permeability, excellent degradation property, no cytotoxicity and the like, and can well meet the demand of wet-process treatment for various wounds.

The invention provides a gene engineer strain of Aspergillus niger with high L-malic acid yield and a construction method thereof. The method utilizes gene knockout technique to disrupt the Aspergillus niger oxaloacetic acid hydrolase gene (oahA) so as to obtain the malic acid-producing strain S2. After 7 days of shake flask fermentation, 100 g/L glucose is converted into 120.4 +/- 2. 8 g/L of L-malic acid, the conversion of malic acid and malic acid to glucose is 1.62 mol/mol, which is 81% of the highest conversion in theory. A good strain for the industrialized production of malic acid is provided.

The present invention is a compound represented by the following formula (1) or (2): where one of R1 and R2 is hydrogen and the other one is hydrogen or glucose residue. The compound is effective for reforming obese constitution, suppressing or preventing obesity. It is also effective for skin whitening.

The invention provides a method for preparing mixed immobilized glucose oxidase (GOD)/catalase (CAT) microspheres and belongs to the technical field of immobilized enzyme. The method comprises the following steps: on the basis of using chitosan-arginine anionic microspheres as carrier, adding a mixed solution of GOD and CAT and glutaraldehyde, performing crosslinking reaction, filtering, washing,and performing freeze drying to prepare mixed immobilized GOD/CAT microspheres. The method has the characteristics of mild reaction conditions, higher recovery rate of enzyme activity, long half-lifeof immobilized enzyme, simplicity in operation, low cost, cleanness, safety, and the like. The product prepared by the method can be widely used in the industries of medicines, food, water treatment,cement and the like. The product can also be used as a glucose-removing reagent, an anti-oxidation reagent, a bactericide, a glucose quantitative analysis reagent and the like.

A water-soluble florfenicol with high solubility (10000 PPM) and low cost is prepared from florfenicol powder and glucose powder through proportional mixing and stirring.

The invention discloses a method for producing glucaric acid by constructing recombinant saccharomyces cerevisiae and fermenting and belongs to the technical field of bioengineering. The method comprises the following steps: knocking out an OPI gene of saccharomyces cerevisiae BY4741; introducing myo inositol-1-phosphate synthase and inositol monophosphatase from the saccharomyces cerevisiae, inositol from arabidopsis thaliana and uronic acid dehydrogenase from pseudomonas syringae into the saccharomyces cerevisiae through constitutive plasmid pY26-GPD-TEF, and realizing approach construction of the saccharomyces cerevisiae from glucose to the glucaric acid. According to the method disclosed by the invention, by use of a constructed metabolic pathway, non-selectivity, high energy consumption property and high cost performance of a chemical oxidation method are avoided; the low-priced glucose is directly transformed into D-glucaric acid with high added value by fermentation culture of engineering bacteria; the method has the advantages of mild reaction conditions, high transformation rate and fewer byproducts; production cost can be greatly reduced.

Substance productivity is improved by introducing a metabolic pathway for synthesis of acetyl-CoA or acetic acid from glucose-6-phosphate into yeast. Acetic acid productivity, acetyl-CoA productivity, and productivity of a substance made from acetyl-CoA-derived are improved by attenuating genes involved in the glycolytic system of yeast and introducing a phosphoketolase gene into the yeast.

The invention relates to a dual-hydrophilic thermo-sensitive polymer/lactic acid polymer composite nanofiber felt and a preparation method thereof. The nanofiber felt comprises the following components: dual-hydrophilic thermo-sensitive polymer and lactic acid polymer with the mass ratio of 10:1. The preparation method comprises the following steps: (1) carrying out free radical polymerization reaction on glucaric acid divinyl ester and N-isopropyl acrylamide to obtain the dual-hydrophilic thermo-sensitive polymer; (2) dissolving the high polymer in a solvent, stirring for 1-4 hours, and carrying out ultrasonic degassing to obtain a spinning solution A; (3) dissolving the lactic acid polymer in the solvent, stirring for 1-8 hours, carrying out ultrasonic degassing to obtain a spinning solution B; and (4) mixing the spinning solution A with the spinning solution B, and carrying out electrostatic spinning to obtain the dual-hydrophilic thermo-sensitive polymer/lactic acid polymer composite nanofiber felt. According to the invention, the method is continuously feasible, the operation is simple and easy, industrialization is easy to realize, and the obtained nanofiber felt can be used for carrying medicines and control the release of the medicine; and the nanofiber felt can also be implanted into a release system and can be used in the fields of tissue engineering scaffold and the like.

The invention provides a method for production of ethanol by continuous fermentation of immobilized yeast cells, and the method comprises the following steps: (1) a fiber material is attached to a support frame, and is filled into a bioreactor; (2) yeast cells are immobilized in the fiber material in the bioreactor; (3) a fermentation medium is added into the bioreactor to begin ethanol fermentation; (4) when glucose in the fermentation medium is consumed, a fermentation liquid flows out of the bioreactor, the ethanol is collected, the fermentation medium is added, and then the step (4) is repeated. The method uses the fiber material for immobilization of the yeast cells for continuous fermentation to produce the ethanol, the fiber material as an immobilization material is stably in property, non-toxic, and good in adsorption and mass transfer effects, can be repeatedly used, is easy to achieve continuous production of the ethanol, and in a continuous fermentation process can greatly improve the ethanol yield.