433 results about "Xylose" patented technology

The invention belongs to the technical field of health-care products, and particularly relates to a fermented composition beneficial to enhancing immunity and a preparation method thereof. The fermentation composition for improving immunity is prepared by taking yeast beta-glucan, an elderberry extract, glucoraphanin, sea cucumber peptide, inulin and a traditional Chinese medicine zymolyte as fermentation raw materials, firstly inoculating bacillus coagulans and staphylococcus xylosus for aerobic fermentation, and then inoculating bifidobacterium longum for anaerobic fermentation, the aerobic fermentation stage and the anaerobic fermentation stage have a synergistic effect, so that the fermentation speed can be increased, the fermentation time can be shortened, and richer nutrient substances can be provided, and therefore, the composition has an excellent effect of enhancing the immunity; the fermentation composition is applied to preparation of capsules helpful for enhancing immunity, is helpful for enhancing human immunity, and can solve the problem that active substances in existing health-care products are difficult to effectively absorb by human bodies, so that the effect of enhancing immunity is influenced.

The invention discloses a method for preparing fermentable sugar from recyclable low-concentration p-toluenesulfonic acid pretreated lignocellulose, which comprises the following steps: firstly, pretreating lignocellulose by using a low-concentration p-toluenesulfonic acid aqueous solution, and carrying out solid-liquid separation to obtain hemicellulose hydrolysate and a pretreated solid component; then saccharifying and pretreating the solid component by using cellulase to obtain hydrolysate rich in glucose, adsorbing the hemicellulose hydrolysate by using hypercrosslinked adsorption resin, carrying out solid-liquid separation to obtain hydrolysate rich in xylose, and carrying out desorption treatment on the resin by using industrial ethanol to obtain xylose; and performing rotary evaporation on the desorbed liquid to remove the industrial ethanol to obtain p-toluenesulfonic acid. According to the method, hemicellulose is efficiently degraded to obtain derived sugar of hemicellulose, meanwhile, the saccharification efficiency of cellulase is improved, p-toluenesulfonic acid is recycled through the hypercrosslinked adsorption resin, and the method has the advantages of being high in fermentable sugar yield, recyclable in acid catalyst, low in cost, environmentally friendly and the like.

The invention discloses a feed for improving the flavor of broiler chickens and a preparation method of the feed, and belongs to the technical field of poultry feeds and feed preparation. Comprising the following components in parts by weight: 55 to 65 parts of basic ration, 35 to 40 parts of sea buckthorn pomace and bean dreg combined ferment, 3 to 5 parts of aquatic product leftover enzymatic hydrolysate, 3.5 to 4.0 parts of trehalose, 1.0 to 1.5 parts of ground cinnamon, 1.0 to 1.5 parts of xylooligosaccharide, 0.8 to 1.0 part of choline, 0.0001 to 0.0002 part of organic selenium and 0.01 to 0.02 part of folic acid. The mass ratio of the choline to the aquatic product leftover enzymatic hydrolysate is 1: (3.0-5.6); the mass ratio of the organic selenium to the sea buckthorn pomace and bean dreg combined fermentation product is 1: (58-100); the sea buckthorn pomace and bean dreg combined fermentation product is prepared by respectively pretreating sea buckthorn pomace and bean dregs and then carrying out aerobic, facultative and anaerobic continuous three-stage fermentation. The technical limitations that flavor substances of traditional feed are easy to inactivate and the utilization rate of agricultural by-products is low are broken through, and the breakthrough of flavor quality upgrading, efficient resource conversion and breeding benefit optimization is achieved.

The invention discloses kluyveromyces marxianus and application of the kluyveromyces marxianus in production of single-cell protein by taking straw as a raw material. The Kluyveromyces marxianus is a ZH-2 bacterial strain which is CGMCC (China General Microbiological Culture Collection Center) No.32295 The strain is obtained from a wild strain in a laboratory adaptive evolution mode, wheat straw and an inorganic nitrogen source can be used as raw materials for efficiently producing single-cell protein, compared with a parent strain, the utilization speed and the utilization rate of biomass, glucose and xylose are remarkably increased, the yield of ZH-2 SCP can reach 0.047 g.g <-1 >, and the yield of ZH-2 SCP can reach 0.045 g.g <-1 >. And the essential amino acid mode basically accords with adult and infant amino acid modes, and can be used as high-quality protein nutrition supply. The Kluyveromyces marxianus ZH-2 strain capable of obtaining single-cell protein by fermenting wheat straw as a raw material is provided from the perspective of utilizing cheap waste resources, so that the production cost of SCP is greatly reduced, and the problem of protein resource shortage is effectively solved.

The invention relates to the technical field of functional food, in particular to immune regulation type prebiotic syrup with synergy of galactomannan. The active components of the composite solid beverage are prepared from the following raw materials in percentage by weight: 20%-35% of fructo-oligosaccharide, 10%-18% of galactooligosaccharide, 8%-15% of stachyose, 3%-7% of xylooligosaccharide, 5%-12% of lactitol, 5%-10% of galactomannan, 2%-5% of yeast beta-glucan and 1%-3% of N-acetylglucosamine. The composition further comprises 4-8% of inulin and 3-6% of resistant dextrin as a matrix filling and slow-release carrier, and the sum of the weight percentages of all the active ingredients and the carrier is 100%. By remodeling intestinal microecology and inhibiting inflammation pathways, the intestinal inflammation state can be remarkably improved, expression of intestinal mucosa tight junction protein is promoted, and an innovative solution is provided for people suffering from chronic bowel diseases and immune imbalance.

The invention provides a healthy food, in particular to a hypoglycemic composition based on homology of medicine and food and gradient fermentation type prebiotics, which is a dry powder preparation and comprises a component A and a component B, the component A is a medicinal and edible component, and the component B is a prebiotic component; the component A is prepared from the following components in parts by mass: 2 to 15 parts of folium mori extract, 2 to 10 parts of bitter gourd extract, 2 to 20 parts of rhizoma dioscoreae extract, 1 to 10 parts of radix puerariae extract, 2 to 10 parts of fructus lycii extract, 0.5 to 5 parts of radix polygonati officinalis extract and 0.5 to 5 parts of rhizoma polygonati extract; the component B is prepared from 20 to 50 parts of resistant dextrin, 5 to 15 parts of xylooligosaccharide, 3 to 10 parts of inulin and 35 to 50 parts of D-psicose. The hypoglycemic activity of the traditional medicinal and edible materials is organically combined with the gradient fermentation type prebiotics, so that the hypoglycemic effect is realized by synergism of multiple action mechanisms, and the problems of single hypoglycemic mechanism and non-ideal blood sugar regulation effect of the existing product are solved.

The invention discloses a lignocellulose biomass-based hard carbon negative electrode material as well as a preparation method and application thereof. The method comprises the following steps: carrying out hydrothermal pretreatment on lignocellulose biomass by using low-corrosivity maleic acid, and regulating and controlling the composition of the lignocellulose biomass, the maleic acid and the lignocellulose to obtain a precursor rich in lignin and cellulose; in the pyrolysis and carbonization process, the thermal stability of the precursor is improved, and the lignin can more effectively inhibit the rapid concentrated pyrolysis of cellulose, so that the rearrangement of pyrolysis products is weakened. The method is beneficial for preventing overgrowth of hard carbon graphite microcrystals during high-temperature carbonization, so that the hard carbon material with large interlayer spacing and abundant small-size closed pores is prepared. The hard carbon material shows high specific capacity and excellent rate capability when being applied to the negative electrode of the sodium-ion battery. Meanwhile, xylose and furfural generated by decomposition of hemicellulose in a liquid phase can be effectively collected, and full-component utilization of biomass is achieved. The requirements of green production are met, and industrial application is easy to realize.

The invention relates to the technical field of fermented beverages, in particular to a preparation method of a high-activity fruit and vegetable probiotic fermented beverage, which comprises the following steps: adding composite fruit and vegetable juice after enzymolysis, mineral water, xylooligosaccharide, grape seed extract, yeast extract and xanthan gum into a fermentation tank, and stirring until the materials are completely dissolved; then carrying out sterilization treatment by adopting high-temperature instantaneous sterilization; adding probiotic microcapsules into the sterilized mixed liquid, and performing staged temperature-controlled fermentation to obtain fermentation liquid; and performing homogenization treatment on the fermentation liquid, and finally performing vacuum degassing to obtain the high-activity fruit and vegetable probiotic fermented beverage. A composite wall material (sodium alginate-eucheuma powder-gellan gum) of the probiotic microcapsule forms a compact gel network to effectively isolate phenols, organic acids and other antibacterial components in fruits and vegetables, so that the damage of pH fluctuation and temperature change to thalli is resisted.

The invention relates to the technical field of microorganisms, in particular to saccharomyces cerevisiae capable of efficiently utilizing xylose. Saccharomyces cerevisiae capable of efficiently utilizing xylose is bred by culturing strains irradiated by ARTP on a xylose plane dish by utilizing an automatic plate coating program and automatically identifying and selecting the strains with larger colony diameter by virtue of Qpix, and the preservation number of the saccharomyces cerevisiae is CGMCC (China General Microbiological Culture Collection Center) No.29981.

The invention provides a probiotic composition for inhibiting helicobacter pylori as well as a probiotic agent and application thereof, and belongs to the technical field of probiotic functional products. The probiotic composition is prepared from the following components in parts by weight: 0.05 to 2 parts of a pediococcus pentosaceus strain A21358, 0.01 to 1.5 parts of a plant lactobacillus strain A21136, 0.05 to 1.5 parts of a lactobacillus rhamnosus strain A21149 and 0.03 to 1.2 parts of a lactobacillus reuteri strain A21325. The probiotic agent comprises the probiotic composition, resistant dextrin, xylooligosaccharide, erythritol, inulin, fructo-oligosaccharide, hericium erinaceus powder, fucoidin and at least one fruit powder selected from grape powder, passion fruit powder and kiwi fruit powder, wherein the specific weight parts of the resistant dextrin, the xylooligosaccharide, the erythritol, the inulin, the fructo-oligosaccharide, the hericium erinaceus powder, the fucoidin and the at least one fruit powder are selected from grape powder, passion fruit powder and kiwi fruit powder. The probiotic agent has the effect of inhibiting helicobacter pylori, and a new thought is provided for clinical related auxiliary treatment of helicobacter pylori infection.

The invention belongs to the technical field of fermentation engineering, and particularly relates to a staphylococcus pseudoxylosus strain and application of the staphylococcus pseudoxylosus strain in enhancing the flavor of fermented food, and the preservation number of the staphylococcus pseudoxylosus strain is GDMCC NO: 66815. The strain can produce lipase and protease, and can significantly enhance the content of flavor substances such as ketones, alcohols, esters, pyrazine furans and the like in fermented food. And inoculating the staphylococcus pseudoxylosus E2 into food to be fermented, and fermenting at 25-40 DEG C for 5-35 days. Compared with natural fermentation, the content of flavor substances in fermented food can be remarkably increased, and the method is suitable for commercialization.

The invention belongs to the technical field of functional food, and particularly relates to a compound fermentation composition for regulating immunity and intestinal microecology as well as a preparation method and application of the compound fermentation composition. The invention provides a compound fermentation composition for regulating immunity and intestinal microecology. Comprising the following components: blueberry freeze-dried powder, an astragalus extract, a lycium ruthenicum extract, a day lily flower extract, grifola frondosa polysaccharide, schizochytrium limacinum powder, a red yeast rice extract, polygonatum polysaccharide, cordyceps militaris, xylooligosaccharide, yeast beta-glucan, lactoferrin, stevioside, a complex microbial inoculant and a complex enzyme. According to the compound fermentation composition disclosed by the invention, high-efficiency immunoregulation, long-acting intestinal balance and maximum component utilization are realized, and an efficient, stable and applicable solution is provided for regulating immunity and intestinal microecology.

The invention relates to the technical field of solid beverages, in particular to isomaltitol dietary fiber particles and a preparation method thereof, and the isomaltitol dietary fiber particles comprise the following components: isomaltitol, Chinese date mulberry extract, golden flower Tibetan tea powder, fructo-oligosaccharide, polydextrose, xylooligosaccharide, stachyose, insoluble dietary fiber, inulin, konjac glucomannan and lycium barbarum polysaccharide. By processing the raw materials and optimizing the process, the problems of poor taste, low stability, single function and the like of the existing dietary fiber product are solved. The application of the microencapsulated isomaltitol and the ultrahigh pressure treated inulin respectively realizes the slow-release control of a sweetening agent and the improvement of the solubility of polysaccharide fibers, and the flavor adjustment of the Chinese date mulberry extract and the decaffeinated golden flower Tibetan tea powder, so that the product has high dietary fiber content and also has fresh and sweet fruit fragrance and elegant tea fragrance; and the taste is fine and caking-free.

The invention provides a composition for reducing blood pressure, blood fat, blood sugar and uric acid and a preparation method thereof, the composition takes nine kinds of vegetable fat such as acer truncatum seed oil, tomato seed oil and the like as core raw materials, a composite antioxidant, phytosterol and xylooligosaccharide are supplemented, multiple-effect synergy is realized through scientific proportioning, and in the preparation process, the composition is free of toxic and side effects. And by adopting a step-by-step stirring technology, a nitrogen protection technology and a gradient ultrasonic homogenization technology, the biological activity of each component is effectively maintained. A plurality of in-vitro experiments and animal models verify that the composition can significantly regulate blood pressure, blood fat, blood sugar and uric acid levels through the synergistic effect of the raw materials. The raw materials are natural, the active ingredients are completely reserved, and the efficacy is stable, so that the functional health-care product has a wide application prospect in the field of functional health-care product development.

The utility model belongs to the technical field of sugar alcohol production equipment, and particularly relates to a pilot plant test combination device for sugar alcohol production. Comprising a pretreatment unit and a plurality of temporary storage modules, the pretreatment unit is connected with a refining unit through the temporary storage module, the refining unit is connected with a concentration unit through the temporary storage module, the concentration unit is connected with a purification unit or a finished product unit through the temporary storage module, and the purification unit is connected with the temporary storage module; the temporary storage module comprises an intermediate tank, the output end of the intermediate tank is connected with an intermediate pump through a pipeline, the input end of the intermediate tank and the output end of the intermediate pump are both connected with hoses and quick connectors installed on the hoses, and the temporary storage module is connected with all the units through the hoses and the quick connectors. According to the utility model, new raw material selection, new auxiliary material verification, process parameter adjustment, resin type selection and the like in the production process of sugar alcohols such as xylose, xylitol, erythritol, maltose and the like can be verified, and the risk caused by industrial production conversion can be remarkably reduced.

This invention relates to a protein feed prepared from biorefined baijiu lees and its preparation method, belonging to the fields of bioengineering and feed resource development technology. It includes the following steps: (1) subjecting the baijiu lees to acid pretreatment and dual-enzyme synergistic hydrolysis sequentially to obtain a hydrolysate containing fermentable sugars; (2) adding Candida utilis culture and urea for carbon-nitrogen synergistic liquid fermentation to obtain a Candida utilis viable count ≥4.0 × 10⁻⁶. 8 Fermentation broth with CFU / mL; drying is then performed. This invention pretreats baijiu (Chinese liquor) lees under high pressure with dilute acid, followed by synergistic hydrolysis with two enzymes, and then utilizes *Candida utilis* for carbon-nitrogen synergistic liquid fermentation, achieving efficient utilization of glucose and xylose, with a cell protein yield ≥0.70 g / L / h. This invention realizes the high-value utilization of all components of baijiu lees, providing a process route with industrial-scale production potential for the biorefining of baijiu lees to prepare protein feed.

The application belongs to the technical field of material application, and particularly relates to a graphitized carbon material and a preparation method and application thereof, the preparation method of the graphitized carbon material is as follows: (1) D-(+)-xylose powder and transition metal salt powder are weighed and uniformly ground; (2) after sieving, calcination is carried out under an inert gas atmosphere; (3) after grinding and sieving of the calcined product, washing is carried out with 1.0 mol / L dilute hydrochloric acid solution, then washing is carried out with distilled water and drying is carried out, to obtain the graphitized carbon material, the graphitized carbon material has high adsorption efficiency on aflatoxin B1 (AFB1) in vegetable oil, and in combination with magnetic solid phase extraction (MSPE) and high performance liquid chromatography-fluorescence detection (HPLC-FLD) technology, the detection limit is as low as 2.0 pg·g ‑1 The graphitized carbon material has excellent regeneration performance, and the material consumption and cost in the detection process are significantly reduced.

The invention discloses a generalized pustular psoriasis diagnosis marker based on metabonomics and application of the generalized pustular psoriasis diagnosis marker. The diagnostic marker is prepared from one or more of the following 35 compounds: pyruvic acid, alpha-ketoisovaleric acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, methane thiophosphoric acid, proline, uracil, tranexamic acid, 4-aminobutyric acid, threonine, scopoletin, dodecanol, N-methyl-L-leucine, L-cysteine-glycine and L-kynurenine. The feed additive is prepared from the following raw materials: 3-hydroxybenzoic acid, allantoin, delta-tocopherol, xylofuranose, glucose-1-phosphoric acid, pyrophosphate, taurine, L-asparagine, phthalic acid, 4-(dimethylamino) azobenzene, 5-tert-butyl-1h-indole-2, 3-dione, quinic acid, glucose, histidine, lysine, palmitic acid, 7-methylguanine, oleic acid and whale acid. The marker can be used for accurately distinguishing patients with generalized pustular psoriasis from healthy people.

The present invention provides a method for stereoselectively reacting a xyloside stereoisomer mixture. The method includes a step for bringing a reaction mixture that contains a cyclic esterified intermediate compound, in which a cyclic ester of boronic acid or boric acid is formed at the 2-position and the 4-position of the xylose moiety of each of α-xyloside and β-xyloside, into contact with silica gel. The step includes returning the cyclic esterified intermediate compound corresponding to α-xyloside to the α-xyloside form before cyclic esterification, and maintaining the cyclic esterified form of the cyclic esterified intermediate compound corresponding to β-xyloside.

To provide a composition that exhibits excellent bacteriostatic performance.SOLUTION: A bacteriostatic composition comprises (A) melanoidin produced from at least one selected from xylose and ribose and at least one selected from phenylalanine and proline as a reaction substrate, and (B) a chelating agent. It is preferable that the chelating agent (B) is at least one selected from citric acid or a salt thereof and condensed phosphoric acid or a salt thereof. It is also preferable that the composition further contains at least one selected from organic acids or salts thereof other than the chelating agent. It is also preferable that the organic acid or a salt thereof is acetate.SELECTED DRAWING: None

The invention provides an energy-saving production process of xylose. The energy-saving production process comprises the following steps: crushing corncobs; a hydrolysis step; decolorizing with activated carbon; removing carbon; performing high-pressure membrane concentration; a step of adding calcium for neutralization; a step of over-carbon saturation reaction; ion exchange; performing secondary membrane concentration; carrying out secondary decolorization and interchange; moisture is removed through a triple-effect or higher-effect evaporator, and the sugar degree is increased to 65%; cooling and crystallizing the high-concentration liquid to generate high-purity xylose powder, and drying the xylose powder; warehousing finished products, sealing boxes of the obtained finished products, bagging and entering a warehouse; the energy-saving xylose production process has the advantages that the membrane concentration equipment is introduced into the production process before neutralization, so that the volume of all subsequent liquid is reduced, and the scale of subsequent treatment equipment and the consumption of water are reduced. A large amount of organic acid is removed in the concentration process, occupation of the organic acid on resin is reduced, and the exchange rate is increased; all substances except the organic acid are concentrated, and after the concentration is increased, a large amount of salt is removed through neutralization, so that the treatment content of a subsequent impurity removal procedure is reduced.

The invention discloses a recombinant bacterium for producing L-lactic acid through co-utilization of glucose and xylose as well as a construction method and application of the recombinant bacterium. The invention relates to the technical field of biology, in particular to recombinant bacteria for producing L-lactic acid through co-utilization of glucose and xylose as well as a construction method and application. Methylglyoxal synthase, and / or pyruvate formate lyase, and / or fumarate reductase and / or L-lactic dehydrogenase in receptor Escherichia coli Rec1.0 are modified to obtain recombinant Escherichia coli, the recombinant Escherichia coli is fermented for 24 h, L-lactic acid is the only metabolite, and the yield reaches 2458 g / L; the consumption rate of xylose is 0.76 g / g DCW / h, the consumption rate of glucose is 0.69 g / g DCW / h, and the consumption rate of total sugar reaches 1.45 g / g DCW / h. The recombinant Escherichia coli constructed by the invention can realize efficient utilization of lignocellulose hydrolysate (containing glucose and xylose), and has a wide application prospect.

The invention relates to the technical field of resin preparation, in particular to macroporous weak-base anion exchange resin as well as a preparation method and application thereof. The crosslinked styrene-divinylbenzene microsphere matrix obtained by a preparation process of regulating and controlling the crosslinked styrene, the divinylbenzene and the pore-foaming agent and adding the crosslinking agent has the advantages of high mechanical strength, controllable specific surface area, adjustable pore diameter and the like. A macroporous weak base anion exchange resin; according to the method, the total exchange capacity reaches 4.8 mmol / g or above, the resin sphericity in the fatigue strength of 100 cycles is 90% or above, the resin sphericity in the fatigue strength of 300 cycles is 70% or above, the treatment volume ratio (BV) in the first cycle in the xylose decolorization process is 80 or above, and the purposes of improving the resin quality, reducing the environmental pollution and improving the energy efficiency ratio can be achieved.

The application discloses a method for preparing bacterial cellulose by using supernatant after protein extraction from distiller's grains and application thereof. The method comprises the following steps: S1, performing protein extraction treatment on a distiller's grains hydrolysate to obtain supernatant after protein extraction from the distiller's grains, then mixing the supernatant with a Henley-Schramm culture medium, adjusting the pH value to 5.5-6.8 to obtain a compound culture medium; S2, inoculating a Komagataeibacter xylinus seed liquid into the compound culture medium, performing shallow static culture, collecting a surface bacterial cellulose membrane, and performing purification to obtain the bacterial cellulose. It is found by experiments that, under the same compound ratio, the yield of the bacterial cellulose prepared by using the supernatant after protein extraction from the distiller's grains is higher than that of the bacterial cellulose prepared by directly using the distiller's grains hydrolysate without protein extraction, and the crystallinity of the obtained bacterial cellulose product is also higher. The preparation process is simple, and can provide an effective way for low-cost industrial production of the bacterial cellulose and efficient utilization of distiller's grains waste.

The invention provides a clostridium thermocellum engineering strain with a high nitrogen utilization rate. NitR regulatory protein is precisely overexpressed in the engineering strain; the precise overexpression is as follows: the expression level of the regulatory protein NitR is 1.2-2.0 times that of a wild type. A chassis strain of the strain is clostridium thermocellum GB2 with a glucosidase expression cassette on a genome, and the clostridium thermocellum GB2 is an engineering strain for expressing BGL in clostridium thermocellum DSM1313. The inventor accidentally finds that when the expression level of the regulatory protein NitR is controlled to be 1.2-2.0 times that of a wild type, the growth ability and biomass accumulation of the engineering strain under the nitrogen-deficient condition are remarkably improved, so that the utilization efficiency of a nitrogen source is increased, and an unexpected technical effect is achieved. The invention further provides a construction method of the clostridium thermocellum engineering strain and application of the clostridium thermocellum engineering strain in saccharification of lignocellulose raw materials. The engineering strain is particularly suitable for saccharification treatment of low-nitrogen-content lignocellulose raw materials (such as corn straw and corn cob residues), the saccharification efficiency is improved while the nitrogen source adding cost is remarkably reduced, and the engineering strain has important significance on industrial application.

The invention provides a method for preparing furfural and co-producing activated carbon from oil-tea camellia fruit cattail, which comprises the following steps: hydrolyzing hemicellulose in the oil-tea camellia fruit cattail by adopting Bronsted acid to directionally convert the hemicellulose into xylose, and further converting the xylose into furfural by utilizing Lewis acid; the influence of process parameters such as reaction temperature, reaction time, acid type, acid concentration and immobilization rate on the furfural yield is systematically investigated. And after the reaction is finished, filtering to obtain solid residues, and further preparing the camellia oleifera fruit and cattail activated carbon by adopting chemical activation and calcination methods. Adsorbing and purifying furfural by using the obtained activated carbon, and analyzing to obtain a furfural product. According to the method for preparing furfural and co-producing activated carbon from the oil-tea camellia fruit cattail, high-value conversion of hemicellulose in the oil-tea camellia fruit cattail and gradient utilization of solid residues are achieved, a closed-loop process path for full utilization and collaborative optimization of the oil-tea camellia fruit cattail is constructed, and the whole process is green and free of'three wastes' emission.

The present application belongs to the field of separation of agroforestry biomass components, and provides a method for subcritical hydrolysis and alkaline DES treatment of castor straw fiber to hydrolyze associated oligomeric xylose and micro-nano lignin. The subcritical hydrolysis method is used to treat castor straw raw materials to obtain a large amount of oligomeric xylose, a small amount of micro-nano low molecular weight lignin and a hydrolysis residue rich in cellulose and lignin; then the hydrolysis residue is treated with alkaline deep eutectic solvent (DES) to obtain a slurry rich in cellulose and micro-nano high aryl ether bond lignin. Finally, the slurry rich in cellulose is enzymatically hydrolyzed by biotechnology to obtain high-yield glucose products. The present application integrates subcritical hydrolysis reaction and alkaline DES treatment technology, and can obtain various high-value-added products of castor straw biomass under mild reaction conditions, thereby providing technical support for the value-added of castor industry and the utilization of castor straw resources.

The invention relates to the technical field of pet oral health care, in particular to a compound seaweed source composition for assisting in improving oral health of dogs and cats and application of the compound seaweed source composition. The invention discloses a compound seaweed source composition for assisting in improving oral health of dogs and cats. The compound seaweed source composition comprises sodium alginate and fucoidan, the value of mannuronic acid (M) / guluronic acid (G) in the sodium alginate is 0.96-1.18; the fucoidan is prepared from mannose, glucuronic acid, galactose, xylose and fucose; the weight ratio of the sodium alginate to the fucoidan is 9: 2. The compound seaweed source composition disclosed by the invention has the effects of inhibiting the proliferation of pathogenic bacteria in the oral cavity of a pet, slowing down the rising rate of health indexes of the oral cavity of the pet, inhibiting the generation of volatile organic compounds and ammonia gas in the oral cavity, improving saliva components, slowing down the generation of dental plaque and the like, and can effectively improve the health condition of the oral cavity of the pet.

The application discloses a preparation method of bio-modified wheat bran containing xylo-oligosaccharide, and comprises the following steps: fermenting wheat bran by using mixed strains and composite enzymes; wherein the mixed strains comprise lactic acid bacteria, Saccharomyces cerevisiae and Bacillus licheniformis; and the composite enzymes comprise cellulase and xylanase. The preparation method provided by the application effectively reduces the contents of crude fiber and neutral detergent fiber in the wheat bran, increases the contents of crude protein and xylo-oligosaccharide in the fermented wheat bran, which are beneficial to the growth and development of animals, and improves the nutritional value of the wheat bran, so that the proportion of the wheat bran in feed application can be increased, and the addition amount of corn and soybean meal can be reduced.

The invention discloses a Kluyveromyces marxianus strain and an application of the Kluyveromyces marxianus strain, and belongs to the field of synthetic biology and microorganism manufacturing. The strain has the characteristics of efficiently utilizing xylose and growing under a low-oxygen condition, and by taking the strain as a fermentation strain, the protein content of fermented straw powder is remarkably improved through the synergistic effect of the strain and cellulase under a straw powder high-solid fermentation condition. According to the yeast strain and the high-solid fermentation process thereof disclosed by the invention, the protein content of straw powder can be greatly increased, and an effective solution is provided for high-valued reutilization of straw agricultural wastes.