227 results about "Triol" patented technology

The invention discloses collagen polypeptide firming and anti-wrinkle freeze-dried powder, and relates to the technical field of cosmetics. The invention relates to a biological preservative which is prepared from water, butanediol, a bacillus / soybean fermentation product extract, soluble collagen, acetyl hexapeptide-8, panthenol, 1, 2, 4-trimethyl-1, 3-pentanediol and a proper amount of water. The cosmetic is prepared from 1, 2-hexanediol, tetrahydromethylpyrimidine carboxylic acid, hydroxypropyl tetrahydropyrantriol, tremella polysaccharide, saccharide isomeride, a bifidus yeast fermentation product lysate, sodium hyaluronate, DNA sodium, a radix gentianae extract, mannitol, palmitoyl tripeptide-1, palmitoyl tetrapeptide-7, oligopeptide-1, decapeptide-4, oligopeptide-3, hydrolyzed royal jelly protein, folic acid and disodium hydrogen phosphate. The additive is composed of sodium dihydrogen phosphate, citric acid and sodium citrate. The mask can provide rich nutrients for skin, deeply care the skin, moisturize and relieve the skin, tighten the skin, resist wrinkles and make the skin moisturized, glossy, elastic and tight, and is high in use safety and wide in application prospect.

The invention belongs to the technical field of cosmetics, and discloses skin-tightening and anti-wrinkle essence. The skin-tightening anti-wrinkle essence is prepared from the following raw materials in percentage by mass: 1.5 to 2.5 percent of acetyl hexapeptide-8, 2.0 to 3.0 percent of palmitoyl pentapeptide-4, 3.0 percent of hydroxypropyl tetrahydropyrantriol, 2.0 percent of lipidosome-coated vitamin C ethyl ether, 0.5 percent of resveratrol PLGA microspheres, 0.8 percent of ceramide NP, 1.2 percent of pachymaran, 5.0 percent of glyceryl polyether-26, 0.3 percent of sodium hyaluronate, 0.5 percent of p-hydroxyacetophenone and 1, 3-propanediol, 0.5 percent of sodium hyaluronate, 0.5 percent of sodium hyaluronate, 0.5 percent of sodium hyaluronate and the balance of water. The 1, 2-hexanediol accounts for 0.6%, and the balance is deionized water. Multi-target anti-wrinkle, deep moisturizing and long-acting repairing are achieved by scientifically compounding active ingredients such as acetyl hexapeptide-8 and palmitoyl pentapeptide-4 and combining a lipidosome wrapping technology and a nano-microsphere slow release technology, the preparation process comprises the steps of lipidosome homogenization, nano-microsphere multiple emulsion method and low-temperature emulsification, the ingredient stability and transdermal efficiency are ensured, and the skin care effect is good. Experiments prove that the essence can significantly improve skin elasticity and reduce wrinkles, and has a significant anti-aging effect.

The invention discloses a polyurethane modified epoxy resin adhesive as well as a preparation method and application thereof, and the polyurethane modified epoxy resin adhesive is prepared from the following components in parts by mass: 7-10 parts of E51 type bisphenol A diglycidyl ether, 3.5 parts of a phenolic aldehyde amine T31 curing agent and 1-3 parts of synthetic polyurethane, the synthetic polyurethane is prepared from polyether triol, polyether amine, isophorone diisocyanate and glycerol carbonate, and a blending system of the synthetic polyurethane and bisphenol A diglycidyl ether is adopted to be subjected to covalent crosslinking with phenolic aldehyde amine T31, so that the adhesive has high toughness and strength guarantee; the synthetic polyurethane prepared by the method is obtained through simple, green and efficient solvent-free synthesis, and the synthesized product has certain fluidity at room temperature, so that the subsequent stirring preparation process of an adhesive is facilitated. And a solvent-free synthesis method is adopted, so that the use of a toxic organic solvent in the traditional polyurethane synthesis process is avoided, and the synthesis process is greener.

The invention relates to the technical field of anti-yellowing, in particular to anti-yellowing lining cloth with a hot melt coating and a preparation method of the anti-yellowing lining cloth. Composite carbon dots, an anti-yellowing agent and a composite chitosan solution are adopted to prepare finishing liquid for finishing the lining cloth; the preparation method comprises the following steps: selecting furfural and urea as a carbon source and a nitrogen source, performing one-step hydrothermal synthesis to obtain a nitrogen-doped furfural-based carbon dot, and grafting an amino-terminated polyimidazolium salt antibacterial compound to obtain a composite carbon dot; wherein the amino-terminated polyimidazolium salt antibacterial compound is an amino-terminated halogen-free polyimidazolium salt antibacterial compound which is prepared by taking ethylenediamine, butyric acid, glyoxal and formaldehyde as raw materials based on amine-aldehyde polycondensation and has good biocompatibility; the preparation method comprises the following steps: by taking polybutylene adipate, toluene diisocynate and isophorone diisocyanate as main monomers, polypropylene oxide triol as a crosslinking monomer, 2, 2-dimethylolpropionic acid and 4, 4 '-diaminodiphenyl disulfide as chain extenders and composite carbon dots as an end-capping reagent, adding water and emulsifying to obtain the waterborne polyurethane hot melt adhesive.

The invention discloses slow-rebound polyurethane sponge for an automobile and a preparation method of the slow-rebound polyurethane sponge, and belongs to the field of preparation of polyurethane sponge for the automobile. Raw materials comprise hollow glass beads, short carbon fibers, hydrophobic nano silicon dioxide, a silane coupling agent, polyether triol, modified MDI, deionized water, a catalyst, silicone oil, an antioxidant, epoxy silane, grafted polyether, clay, absolute ethyl alcohol, a dispersing aid and a stabilizer, and the raw materials are treated. According to the slow-rebound polyurethane sponge for the automobile and the preparation method of the slow-rebound polyurethane sponge, composite reinforced particles containing hollow glass beads, short carbon fibers and hydrophobic nano silicon dioxide are prepared and added into the sponge to form three supporting force areas, differential supporting is achieved, collapse is prevented, and materials are saved; and meanwhile, the transition area is arranged, so that smooth connection can be achieved, and stability, comfort and durability are improved.

The present invention provides: a packaging material which is excellent in terms of breaking resistance and easy tearability; a polyisocyanate composition which is suitable for the manufacturing of this packaging material; and an adhesive.　The present invention specifically provides a polyisocyanate composition (X) which contains a polyisocyanate compound (A), wherein: the polyisocyanate compound (A) contains 60 mass% or more of a bifunctional polyisocyanate compound (A1) that is derived from a non-aromatic diisocyanate; a polyol mixture contains 70 ± 1 mass% of a polypropylene diol that has a hydroxyl value-based number average molecular weight of 415 ± 20 and 30 ± 1 mass% of a polypropylene triol that has a number average molecular weight of 415 ± 35; a coating film, which is obtained by curing with the molar ratio [NCO] / [OH] of the isocyanate groups of the polyisocyanate compound (A) to the hydroxyl groups of the polyol mixture being 1.3 ± 0.1, has an elongation at break of 30% or more as determined at a tensile rate of 200 mm / minute at 25°C and a humidity of 40%.

The invention discloses a skin-tightening anti-wrinkle essence and a preparation process thereof, and relates to the technical field of cosmetic preparation, and the preparation process comprises the following steps: obtaining animal umbilical cord tissue, culturing, collecting cell culture supernatant after culture, carrying out low-speed centrifugation to remove cells and dead cells, and carrying out concentration, filtration and sterilization through a tangential flow membrane technology to obtain the skin-tightening anti-wrinkle essence. The animal umbilical cord extract is obtained; the preparation method comprises the following steps: mixing the animal umbilical cord extract with water, butanediol, glycerol, hydroxypropyl tetrahydropyrantriol, 1, 2-hexanediol, trehalose, p-hydroxyacetophenone, allantoin, hydrolyzed sodium hyaluronate, sodium hyaluronate, tetrahydromethylpyrimidine carboxylic acid, xanthan gum and essence, homogenizing under a stirring condition, and standing for defoaming. By constructing an active stable microenvironment and an efficient transdermal delivery system, the technical problem that the animal umbilical cord extract serving as a core component is easy to inactivate and difficult to absorb is solved, and a faster and more stable skin structure remodeling effect is realized by utilizing the synergistic effect of the animal umbilical cord extract and functional components.

The invention relates to the technical field of polystyrene foam, in particular to bi-component polyurethane polystyrene foam based on a microencapsulation catalyst and a preparation method of the bi-component polyurethane polystyrene foam. The component A comprises polyether polyol, isocyanate and a modified nano composite system; the component B comprises polyether triol, a foaming agent and a microencapsulation catalyst, and the microencapsulation catalyst is dibutyltin dilaurate coated with a polyurea shell layer; a microencapsulation catalyst is introduced into the component B through a low-speed dispersion process before mixing, and a polyurea shell layer is broken through mechanical shear force during mixing to release dibutyltin dilaurate. The microencapsulation catalyst is broken during sizing, compared with a traditional catalytic system, the curing time is greatly shortened, silane coupling agent modified nano silicon dioxide and carbon nano tubes are introduced to synergistically enhance the filler, and the mechanical strength and aging resistance of the polystyrene foam are enhanced.

The invention provides a composition containing glaine and sodium mannose phosphate and application of the composition in functional skin care products. The composition is prepared from the following components in percentage by mass: 12 to 25 percent of hydroxypropyl tetrahydropyrantriol, 0.05 to 1 percent of sodium mannose phosphate, 0.001 to 0.01 percent of acetyl octapeptide-3, 0.1 to 0.5 percent of saccharomycetes / rice fermentation product filtrate, 0.01 to 0.15 percent of bifidus yeast fermentation product filtrate, 0.2 to 0.5 percent of lactobacillus / soybean milk fermentation product filtrate and the balance of water or other solvents. According to the composition, through synergistic matching of all the components, the composition can resist wrinkles, whiten the skin and brighten the skin color. The composition is used in skin care products, can effectively resist wrinkles, whiten and brighten skin, and enables the skin to keep a good state.

Hair Styling Compositions and Processes: The disclosure relates to compositions comprising (a) at least one sucrose ester; (b) at least one nonionic polysaccharide thickening agent; (c) at least one cationic surfactant; (d) at least one emulsifier selected from fatty alcohols, esters, or a combination thereof; (e) optionally, at least one C3-C8 polyol selected from diols and triols; and (f) optionally, at least one fatty compound. The compositions may be used as leave-in hair styling compositions. The disclosure also relates to kits comprising the compositions and processes for using the compositions. Figure for the abstract: Figure 1

The invention relates to the technical field of skin care essence, in particular to double-layer essence with an anti-aging effect and a preparation method thereof.The double-layer essence with the anti-aging effect is composed of a water phase layer and an oil phase layer; the water-phase layer is prepared from the following raw materials in percentage by mass: 3-8% of hydroxypropyl tetrahydropyrantriol, 0.1-0.5% of tetrahydromethylpyrimidine carboxylic acid, 0.01-0.1% of a pepper kava extract, 1-5% of lactobacillus / soybean milk fermentation product filtrate, 1-5% of vitamin C ethyl ether, 1-5% of acetylchitosamine, 3-8% of 1, 3-butanediol and the balance of water. The invention relates to an anti-aging mask which comprises the following components in percentage by weight: 1-10% of 1, 3-butanediol, 0.01-0.1% of sodium hyaluronate, 0.1-0.5% of a buffer system, 5-10% of glycerol and the balance of deionized The oil phase layer is prepared from the following raw materials: 0.5-2% of ascorbyl tetraisopalmitate, 11-44% of compound plant-derived grease and 0.05-0.3% of tocopheryl acetate, and the problems that existing essence oil is lack of a multi-dimensional synergistic anti-aging effect, and the stability and transdermal absorption efficiency of water-soluble active ingredients and oil-soluble ingredients are difficult to consider are solved.

The invention belongs to the field of traditional Chinese medicine chemistry and natural product separation, and particularly relates to extraction and separation of a novel triterpenoid compound 25-Etherxy-dammar-20 (22) Z-ene-3beta, 6alpha, 12beta-triol and application of the novel triterpenoid compound 25-Etherxy-dammar-20 (22) Z-ene-3beta, 6alpha, 12beta-triol in myocardial protection drugs. The compound is named as 25-Etherxy-dammar-20 (22) Z-ene-3beta, 6alpha, 12beta-triol, and the structural formula of the compound is shown in the description. The invention provides an extraction and separation method of the compound. The extraction and separation method mainly comprises the following steps: sequentially carrying out solvent extraction, macroporous adsorption resin enrichment, silica gel column chromatography, ODS medium-pressure column chromatography, high performance liquid chromatography separation and purification and the like on ginseng and other traditional Chinese medicine processed products and hydrolysates. The structure of the compound is determined through comprehensive analysis of a high-resolution mass spectrum (HRMS), one-dimensional nuclear magnetic resonance (1H NMR, 13C NMR) and a two-dimensional nuclear magnetic resonance spectrum (such as HSQC, HMBC, ROESY and the like), and the compound is a newly discovered dammarane type triterpene compound. Experiments show that the compound and the composition thereof have a remarkable protection effect on myocardial cell hypoxia / reoxygenation reperfusion injury, and can be used for preparing drugs for preventing or treating myocardial ischemia reperfusion injury and other related diseases.

A glycoside drug oral preparation for treating cerebral ischemic stroke during the recovery period and a preparation method therefor. The glycoside drug is (2R,3S,4S,5R,6R)-2-(hydroxymethyl)-6-(4-(4-methoxyphenyl)butoxy)tetrahydro-2H-pyran-3,4,5-triol. The oral preparation can provide a high drug loading capacity, release the drug within a short time period, and ensure rapid drug dissolution, and the prepared tablet has high stability, involves a simple preparation process and is suitable for large-scale industrial production.

The present disclosure relates to a polyester formed by the reaction of a plurality of monomers, and the monomers include: 7 to 20 mole parts of (a) an aliphatic triol monomer; 40 to 80 mole parts of (b) a first diol monomer; 12 to 40 mole parts of (c) a second diol monomer; and 100 mole parts of (d) an aliphatic dicarboxylic acid monomer or an aliphatic acid anhydride monomer. The chemical structure of (b) the first diol monomer is as follows: or wherein each R 1 is the same. The chemical structure of (c) the second diol monomer is as follows: wherein R 6 is different from R 7 ​

An electric driveline fluid is described. The fluid comprises an oil of a major lubricating viscosity, an electric driveline additive including glycerol, glycol, glycol ether, pentaerythritol, vicinal diol, triol, or derivatives thereof, and at least one overbasic sulfonate detergent. The amount of the electric driveline additive is approximately 0.001% to approximately 1.5% by weight, based on the total weight of the electric driveline fluid.

The application discloses a composition with long-acting anti-wrinkle, skin elasticity improvement and skin tightening effects, a preparation method and application thereof, and belongs to the technical field of cosmetics. The composition comprises the following efficacy components: Schizosaccharomyces pombe ferment lysate, hydroxypropyl tetrahydropyrane triol, lactose, whey protein, lactic acid, Lactarius volemus extract and palm leaf tree extract. The eye cream prepared by using the composition has very significant long-acting anti-wrinkle, skin elasticity improvement and skin tightening effects. After 28 days of use, the R2 value of skin elasticity at the corner of the eye is increased by more than 20%, the R0 value of total skin stretching displacement is decreased by more than 40%, the proportion of wrinkle area is decreased by more than 15%, and the wrinkle depth is decreased by more than 27%. The effect after 28 days of use is also significantly better than that after 14 days of use.

The invention discloses a whitening, anti-wrinkle, firming and soothing multi-effect composition, which is prepared from the following raw material components: nicotinamide, hydroxypropyl tetrahydropyrantriol, p-hydroxyacetophenone, glycerol, 1, 2-pentanediol, 1, 2-hexanediol, a barley extract composition, panthenol, a radix gentianae extract composition, an oat kernel extract composition and the balance of water. The barley extract, the radix gentianae extract and the oat kernel extract are added into the whitening, anti-wrinkle, firming and soothing multi-effect composition, so that melanosome can be inhibited from being transferred to the skin surface, DNA damage caused by UV is repaired, photoimmunosuppression is intervened, elastase and hyaluronidase are inhibited, and the whitening, anti-wrinkle, firming and soothing multi-effect composition has the advantages that the whitening, anti-wrinkle, firming and soothing functions are realized; the face cream prepared from the multi-effect composition for whitening, resisting wrinkles, tightening and relieving has the effects of whitening, resisting wrinkles, tightening and relieving.

The present invention relates to a process liquid composition for improving crack defects in a photoresist pattern during a photoresist patterning process, and a pattern forming method using the same. The photoresist pattern is hydrophobic, with a contact angle of water on the photoresist surface being 75° or greater. More specifically, the present invention relates to a process liquid composition comprising 0.00001 to 0.1% by weight of a fluorochemical surfactant, 0.00001 to 1.0% by weight of a substance selected from the group consisting of a triol derivative, a tetraol derivative, or a mixture thereof, and the balance being water, and having a surface tension of 45 mN / m or less and a contact angle of 65° or less.

The invention discloses a boiler deashing and decoking agent, and belongs to the field of boiler deashing and decoking. Comprising the following substances in parts by weight: 15-20 parts of sodium carbonate, 5-10 parts of sodium sulfate, 20-25 parts of potassium hydroxide, 12-16 parts of 8-hydroxyquinoline sulfate, 10-15 parts of modified nano silicon dioxide, 1-2 parts of polyvinylpyrrolidone, 3-5 parts of potassium chlorate, 2-6 parts of sodium lignin sulfonate, 3-5 parts of polyoxypropylene triol, 2-4 parts of an ethyl acrylate-acrylonitrile copolymer and 20-30 parts of modified calcium carbonate. The modified nano silicon dioxide can be uniformly dispersed in the medicament by virtue of nano-scale particle size and surface modification treatment, so that the contact area with deposited ash and coke blocks is increased, and the removal efficiency is improved; the polyvinylpyrrolidone is helpful for keeping the components in a good dispersion state in the use process, and agglomeration is avoided; and through the synergistic effect of all the raw materials, a good ash removal and decoking effect can be achieved, so that normal use of the boiler is ensured.

Disclosed herein are compositions and methods useful for the prevention, treatment, reduction, or amelioration of various diseases, disorders, or conditions. Some aspects pertain to a pharmaceutical composition comprising 17-ethynyl-10R, 13S-dimethyl 2, 3, 4, 7, 8R, 9S, 10, 11, 12, 13, 14S, 15, 16, 17-hexadecahydro-1H-cyclopenta[a]phenanthrene-3R, 7R, 17S-triol, including solid states thereof. Also presented herein is the surprising discovery that exposing a subject to the compound and / or compositions disclosed herein can prevent, treat, reduce, or ameliorate a condition related to a subject previously infected with a virus.

This invention discloses a firming and wrinkle-reducing eye cream, comprising a moisturizer, a whitening agent, a skin repair additive composition, a thickener, a preservative, a film-forming agent, a skin moisturizer, and a surfactant. The weight ratio of the moisturizer, whitening agent, anti-aging additive composition, thickener, preservative, film-forming agent, skin moisturizer, and surfactant is 20:1:2:3:0.3:0.5:1:0.2. The moisturizer includes butylene glycol, glycerin, polydimethylsiloxane, and hydrogenated polyisobutylene. The skin-repairing additive composition includes hydroxypropyl tetrahydropyranotriol, adenosine, cell growth factors, ceramides, and salicylic acid, comprising olefins, betaine, trehalose, 1,2-hexanediol, hydrogenated lecithin, allantoin, and Euglena galactosides. The film-forming agents include polyacrylamide, cyclohexylsiloxane, and polydimethylsiloxane alcohol. The emollients include C13-14 isoparaffins, polydimethylsiloxane / vinyl dimethylsiloxane crosspolymers, and cyclopentamethoxysiloxane. This invention can repair cells and provide long-lasting anti-wrinkle and whitening protection for the corners of the eyes.

A one-component moisture-curing adhesive composition comprising from 80 to 100 wt% of an isocyanate-functional prepolymer obtainable by reacting: (a) a polyisocyanate component comprising methyl diphenyl diisocyanate; and (b) a polyol mixture comprising: (b1) a linear butylene oxide-based diol with two primary hydroxyl groups; and (b2) a polyether triol with three secondary hydroxyl groups; (c) a chain extender, which chain extender is different from (b1) or (b2), has a functionality of from 2 to 5, a molecular weight of from 50-400 g / mol and at least two groups which are reactive with an isocyanate group; wherein the equivalent ratio between isocyanate groups in (a) and hydroxyl groups in (b) is in the range of from 3.5 to 7.0; and wherein the content of free isocyanate groups in the adhesive composition is in the range of from 13 to 18 wt%; a method of making the prepolymer, a bonded material and a method of bonding material using an adhesive.

The invention discloses a cross-linked toughened modified low-temperature hot-melt adhesive polyester chip and a preparation method thereof. A semi-continuous production synthesis device is used. During the esterification reaction process, different diols, triols and dibasic acids are introduced in three steps. Each esterification step is completed in stages by controlling the addition sequence and the reaction temperature, ensuring that the replaced alcohol and acid can generate specific esterification segments, thereby achieving the purpose of cross-linking and toughening modification. After the esterification is completed, the esterified product is introduced into a polycondensation reaction device through a 15-25 μm filter and nitrogen pressurization. The polycondensation reaction temperature, vacuum degree, stirring rate and final temperature are controlled to achieve preset values ​​before discharging. The intrinsic viscosity is ensured to be 0.450±0.005 dl / g and the melt index is achieved to be above 65 g / 10 min (160° C. / 2160 g). The high-temperature melt passes through a casting head, an underwater pelletizing device and a drying device, finally obtaining the cross-linked toughened modified low-temperature hot-melt adhesive polyester chip.

The invention relates to the technical field of flame retardants, in particular to a high-performance flame retardant suitable for a composite material and a preparation method thereof, and the high-performance flame retardant comprises the following raw materials in parts by weight: 45-55 parts of isocyanate, 45-55 parts of polypropylene triol, 5-10 parts of dimethyl methylphosphonate and 2-10 parts of an additive. According to the invention, a base material of the additive is generated from hydrogenated tallow amine polyoxyethylene ether, KH560, KH792 and other components, the interface bonding force between flame retardant molecules and a matrix is enhanced, KH570 modified composite hydroxide, nano-silica and the like form a filler, and through wrapping and bridging of the base material in the additive, nano-scale uniform dispersion in the matrix is realized, and the base material and the nano-silica cooperate with each other, so that the flame retardant performance is improved. A firm anchoring and dispersing structure is constructed between the flame retardant and a composite material matrix, and migration and precipitation of the flame retardant due to weak interface bonding force are effectively inhibited, so that the durability of the flame retardant property is ensured.

A polyurethane resin and method for producing the same are provided. The method includes a mixing process implemented by mixing a polyether glycol and a polyether triol, a reacting process implemented by adding an isocyanate into the polyether glycol and the polyether triol that are mixed with each other to form a first polymer, a chain extending process implemented by adding a chain extender to the first polymer to form a second polymer, a blocking process implemented by adding a blocking agent to the second polymer to form a third polymer, and a diluting process implemented by diluting the third polymer with a diluting solvent to form a polyurethane resin. The polyurethane resin has a hard chain ratio between 27% and 34%, a glass transition temperature between −40.2° C. and −44.8° C., and a tensile strength between 62.5 kg / 3 cm and 68.7 kg / 3 cm.

The invention provides an anti-aging composition and a skin care product. The anti-aging composition is prepared from components in percentage by mass as follows: 5%-40% of hydroxypropyl tetrahydropyrantriol, 5%-40% of a skin feeling / rheology regulator and 2%-12% of a ternary compound, the ternary complex is prepared from the following raw materials: organic acid, amino acid and saccharides. The anti-aging composition provided by the embodiment of the invention can be used for improving the skin penetration of the hydroxypropyl tetrahydropyrantriol.

Provided is a polyurethane resin with which it is possible to produce a moisture-permeable film having excellent moisture permeability as well as excellent laundering durability, alcohol resistance, suitability for repeated coating, heat resistance, light resistance, and flexibility. A polyurethane resin which is a reaction product of (i) a polyol component, (ii) a chain extender, and (iii) a polyisocyanate component. (i) the polyol component comprises (i-1) a polyethylene glycol and (i-2) a polyether polyol, (ii) the chain extender comprises two or more types of (ii-1) C2-4 linear alkanediol, (iii) the polyisocyanate component comprises (ii-1) an aromatic diisocyanate and (ii-2) an aliphatic diisocyanate, and the polyurethane resin satisfies the following condition (1) and the like. Condition (1): (ii) the chain extender further comprises (ii-3) a trihydric alcohol.

The invention provides high-purity hydroxypropyl tetrahydropyrantriol and a synthesis method of the high-purity hydroxypropyl tetrahydropyrantriol. The preparation method comprises the following steps that carbohydrate raw materials and glycosyl transferase are mixed in a buffer solution for an enzymatic reaction, the mass percentage of the carbohydrate transferase in the carbohydrate raw materials is 0.1%-5%, and the carbohydrate transferase comprises one or more of UDP-glucosyltransferase and GDP-mannosyl transferase. And after the enzymatic reaction is finished, adding an organic tin compound such as tributyltin hydride into a reaction system in a protective gas range, and carrying out reduction reaction. And after the reduction reaction, removing most of the solvent in the reaction system to obtain a concentrate. And carrying out supercritical extraction on the concentrate by adopting carbon dioxide as a supercritical fluid and ethanol as an entrainer so as to obtain the high-purity hydroxypropyl tetrahydropyrantriol. The synthesis method can achieve the effects of few reactant residues, no boron residues and low synthesis cost.

The invention relates to a multi-site COF-COF adsorbent as well as a preparation method and application thereof, and belongs to the technical field of composite adsorption materials. According to the invention, pyrogallol and diaminomaleonitrile are used to construct a primary COF skeleton, the primary COF skeleton is expanded by 2, 5-dithiourea to prepare the multi-site COF-COF adsorbent DPDA, and the structural formula of the multi-site COF-COF adsorbent DPDA is shown in the specification; the multi-site COF-COF adsorbent disclosed by the invention can be used for efficiently and selectively adsorbing gallium ions from a solution, and the multi-site COF-COF adsorbent has relatively high cyclic regeneration capacity.

The invention provides a preparation method and application of a BMP-2 / Apt19S two-factor immobilized mesoporous bioglass material, and belongs to the technical field of biomaterials. The mesoporous bioglass material with an ordered mesoporous structure, high specific surface area and good biological activity is stably prepared by combining a sol-gel method with a surfactant template technology; by introducing carboxyethyl silanetriol sodium, carboxyl functionalization on the surface of the material is realized, and further through amide reaction, a deoxynucleotide fragment Apt19S is grafted, so that the material has good stem cell collection capability and bone-induced growth factor BMP-2 loading capability; the method is simple in process, and the biological activity of the growth factor can be well maintained. The prepared BMP-2 / Apt19S two-factor immobilized mesoporous bioglass material is expected to realize targeted enrichment and slow release of drugs in the field of bone defect repair, improves bone regeneration efficiency, and has important clinical application prospects.