21results about How to "Avoid oxidative degradation" patented technology

The invention belongs to the field of sewage treatment processes. The front pollutant enrichment sludge discharge energy-saving AAO process comprises the following steps: step 1, carrying out sewage filtration treatment; 2, the pretreated sewage enters an anaerobic tank, and a stirrer is arranged in the anaerobic tank for stirring; 3, the sewage above the side drainage tank enters an anoxic tank, and a stirrer is arranged in the anoxic tank for stirring; 4, the sewage treated in the step 3 enters a settling pond, sludge is settled to the bottom through the settling pond, and treated clear water on the upper layer is discharged; all sludge in the sedimentation tank flows back into the anaerobic tank, part of the sludge after adsorption and absorption of carbon source organic substances enters the side discharge tank, and the side discharge tank discharges the sludge regularly; the process is simple to operate, low in cost and better in economic benefit, the incoming water load of a biochemical unit can be reduced, and the impact on a biochemical system caused by large fluctuation of the incoming water concentration can be relieved.

The invention belongs to the technical field of cosmetic production, and discloses an anti-aging composition which comprises a nymphaea tetragona flower extract and vegetable oil, and the mass ratio of the nymphaea tetragona flower extract to the vegetable oil is (0.5-2): 4. The vegetable oil is selected from at least one of sunflower seed oil, peony seed oil, olive fruit oil, prunus amygdalus dulcis oil, linseed oil and borage seed oil, and the vegetable oil at least contains the sunflower seed oil. The invention discloses an anti-aging composition capable of delaying skin aging, and in addition, the invention further discloses application of the anti-aging composition and a cosmetic.

The application belongs to the technical field of natural substance separation and extraction, and particularly relates to a kind of Haematococcus pluvialis multi-product cascade separation method based on eutectic solvent sequential extraction and enzyme membrane reactor coupling, comprising the following steps: (1) cell wall weakening pretreatment step; (2) water-soluble component extraction step; (3) pigment component extraction step; (4) astaxanthin extraction step; (5) enzyme conversion step. Through the synergistic effect of eutectic solvent sequential extraction and enzyme membrane reactor, efficient, green and continuous cascade separation of water-soluble components, pigments, astaxanthin and xylo-oligosaccharides in Haematococcus pluvialis is realized, and product purity and resource utilization are improved.

The invention discloses an immersed cooling liquid and a preparation method thereof, and relates to the technical field of cooling liquids, the immersed cooling liquid comprises the following raw materials by weight: 90-100 parts of base oil, 7-9 parts of an auxiliary agent A, 4.5-5.5 parts of an auxiliary agent B, and 0.5-1.0 part of an antifoaming agent. The auxiliary agent A is obtained by modifying a high-thermal-conductivity insulating filler through a reaction and introducing benzotriazole and an alkane long chain. The auxiliary agent B is a substance which contains hindered phenol, DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and an alkane long chain and has a hyperbranched macromolecular structure. The auxiliary A and the auxiliary B are added, so that the immersed cooling liquid has excellent thermal conductivity, corrosion inhibition, oxidation resistance and flame retardance, the synthesis process of the auxiliary A and the auxiliary B is environmentally friendly, and the immersed cooling liquid is worthy of being popularized in the technical field of cooling liquid and has a considerable application prospect.

The invention relates to the field of plant extraction application, and particularly discloses a powder essence containing a rose extract concentrated solution and a preparation method thereof, and the powder essence comprises the following raw materials: the rose extract concentrated solution, water, corn starch, modified starch, citric acid, sodium tripolyphosphate, sodium hexametaphosphate, potassium sorbate and a rose essence base; the rose extracted concentrated solution is obtained by extracting and concentrating rose as a raw material and a mixed solution of malt syrup, water and an organic solvent as an extraction solvent; the preparation method comprises the following steps: heating and melting the rose extract concentrated solution, the water, the corn starch, the modified starch, the citric acid, the sodium tripolyphosphate, the sodium hexametaphosphate and the potassium sorbate, uniformly mixing, adding the rose extract concentrated solution, adding the rose essence base and the carmine solution, uniformly stirring, homogenizing, and spray-drying to obtain the powder essence. The rose powder essence with better flavor is prepared by using the rose as the raw material to obtain the rose extraction concentrated solution.

The invention belongs to the field of powder injection molding materials, and particularly relates to an injection molding additive for 5G optical communication and a preparation method and application thereof. The additive comprises the following raw material components in parts by weight: 80-100 parts of polystyrene; 0.1 to 3 parts of a surfactant; 0.1 to 5 parts of a lubricant; 2-6 parts of glass fiber; 4-8 parts of hollow glass beads; 1-3 parts of a flame retardant; and 0.5-2 parts of an antioxidant. According to the present invention, polystyrene is adopted as the base resin, a variety of functional assistants are added, and the formula is optimized, such that the obtained additive is used in the 5G optical communication injection molding process, such that the uniform powder dispersion can be promoted, the fluidity is good, the processing performance is excellent, and the material strength and the signal transmission efficiency and strength can be improved.

This utility model discloses a trenchless composite liner pipe with chemical corrosion resistance, comprising a chemical corrosion resistant inner layer, an outer surface of which is provided with a reinforcing structural layer, an outer surface of which is provided with an elastic buffer layer, an outer surface of which is provided with an adhesive transition layer, and a connector fixedly connected to the side surface of the chemical corrosion resistant inner layer. A sealing ring is provided on the inner surface of the connector. Through the dual protection of hindered phenolic antioxidants and benzotriazole ultraviolet absorbers in the chemical corrosion resistant inner layer, it can not only effectively resist the erosion of the inner layer by corrosive media such as acids, alkalis, and solvents, preventing material oxidation and degradation, but also block aging and cracking problems caused by ultraviolet radiation, ensuring that the inner layer maintains its structural integrity for a long time. This fundamentally reduces the frequency of pipeline maintenance and replacement due to corrosion damage, and significantly extends the overall service life of the pipeline.

The invention relates to the technical field of papermaking additives, and discloses a preparation method of a tannic acid-based papermaking additive, which comprises the following steps: 1) preparation of a tannic acid solution: dissolving tannic acid in deionized water, and stirring to form a uniform solution; 2) preparing a cationic starch solution: dissolving cationic starch in deionized water, heating and stirring until the solution is uniform; and 3) preparing a tannic acid-cationic starch emulsion: slowly dropwise adding the cationic starch solution into the tannic acid solution, heating to a set temperature, keeping the reaction, and cooling to obtain the tannic acid-cationic starch emulsion. The tensile strength and anti-cracking strength of paper are remarkably improved through modified tannic acid, the fiber dispersity and the sizing liquid retention rate are improved, the problem that a traditional auxiliary is insufficient in performance is solved, meanwhile, an environment-friendly modification technology is adopted, use of toxic chemical reagents is reduced, the long-term stability and environment friendliness of the auxiliary are improved, and the requirement for sustainable development is met.

The invention relates to lycopene water dispersible powder and a preparation method thereof, and belongs to the technical field of food additives. The method comprises the following steps: esterifying octadecyl alcohol and food-grade phosphoric acid, and reacting with edible gelatin to prepare modified edible gelatin; then lycopene dry powder is dispersed in ethyl acetate, a compound emulsifier, modified edible gelatin and 1, 3-propylene glycol are added, and preliminary embedding is achieved through high-speed shearing and ultrasonic nanocrystallization treatment; and step-by-step vacuum drying, secondary embedding with an excipient, freezing, crushing and screening are carried out, such that the water dispersible powder with a particle size of 0.1-0.2 mm is prepared. Through the hydrophobic binding and charge repulsion effects of the modified gelatin and the synergistic process of ultrasonic nanocrystallization and double embedding, the technical problems that traditional lycopene is poor in water dispersibility, prone to layering, high in solvent residue and insufficient in stability are solved. The prepared product is suitable for healthy food systems such as water-based food, beverage and the like, and has the advantages of convenience in storage and transportation and high bioavailability.

The utility model relates to the technical field of laboratory equipment, in particular to a dissolution instrument operation cabinet which comprises an operation cabinet body and a control panel, a dissolution instrument placing area and a reagent placing area are arranged in the operation cabinet body, a partition plate is arranged between the dissolution instrument placing area and the reagent placing area, and the control panel is arranged in the operation cabinet body. A fixing device is mounted in the dissolution instrument placement area and comprises a two-way screw rod, a moving block, a clamping plate and a driving motor, the two-way screw rod drives the moving block to get close to the middle from the two ends in the rotating process, and the moving block drives the clamping plate to move towards the dissolution instrument until the clamping plate makes contact with the left side wall and the right side wall of the dissolution instrument; the sliding block moves towards the front end face of the dissolution tester until the sliding block drives the limiting plate to make contact with the front end face of the dissolution tester, the dissolution tester is limited, the dissolution tester is prevented from moving front and back, and self-adaptive fixing of dissolution testers of different models can be achieved conveniently.

The invention relates to a lacosamide injection and a preparation method thereof. The injection contains lacosamide, a stabilizer, an antioxidant, a complexing agent and a buffer solution. The injection is characterized in that the stabilizer is sodium gluconate, the antioxidant is sodium pyrosulfite, alpha tocopherol and glutathione, the complexing agent is edetate disodium, and the buffer solution is an acetic acid-sodium acetate buffer solution. Meanwhile, the invention discloses a corresponding preparation method. Compared with the prior art, the preparation method has the advantages that the stability of lacosamide is obviously improved, particularly, the generation of two main impurities, namely an impurity D (N-deacetylated lacosamide hydrochloride) and an impurity F (demethylated lacosamide), can be obviously reduced, the quality of a preparation product is improved, the toxic and side effects are reduced, and the preparation method is simple, low in cost and suitable for industrial production. The method is suitable for industrial large-scale production.

The invention discloses a high-temperature-resistant hot melt adhesive and a preparation method thereof, and relates to the technical field of hot melt adhesives. The high-temperature-resistant hot melt adhesive is prepared from the following raw materials in parts by weight: 25 to 35 parts of modified polyimide resin, 20 to 30 parts of modified benzoxazine resin, 8 to 12 parts of carboxyl-terminated nitrile rubber, 5 to 8 parts of C5 / C9 copolymerized petroleum resin, 3 to 5 parts of hydrophobic modified nano silicon dioxide, 1 to 2 parts of silicone powder, 0.5 to 1.0 part of antioxidant 1010, 0.3 to 0.8 part of zinc stearate and 0.05 to 0.1 part of tetrabutylammonium bromide. The high-temperature-resistant hot melt adhesive is scientific in raw material ratio, core resin is modified to improve heat resistance and compatibility, filler such as hydrophobic nano silicon dioxide is added to enhance performance, the preparation process is controllable, nitrogen protection is achieved in the whole process, moisture absorption is prevented through granulation and drying treatment, and a finished product is excellent in high-temperature resistance, good in comprehensive performance and good in storage stability.

The invention belongs to the technical field of medicines, and particularly relates to a ceftriaxone sodium powder injection and a preparation method thereof. According to the invention, the water-soluble vitamin E and the L-cysteine are used for synergistically exerting anti-oxidation and anti-agglomeration effects, so that the agglomeration phenomenon in the polymer generation and crystallization process is effectively inhibited; chitosan modified mesoporous silica is adopted as a drug carrier, and drugs are promoted to orderly enter mesoporous channels through positive charge mediation, so that efficient loading of the drugs is realized, and biocompatibility is improved; by utilizing a supercritical anti-solvent crystallization technology, the drug is crystallized in situ in a mesoporous channel to form a highly dispersed state, and the specific surface area of the drug is obviously increased, so that the ultra-fast dissolution is realized; the ceftriaxone sodium powder injection prepared by the invention has the excellent characteristics of high dissolution speed, uniform particle size, no agglomeration, good stability, high safety and high drug loading efficiency.

The application belongs to the technical field of in vitro diagnostic reagents, and discloses a cleaning solution for acridinium ester chemiluminescence immunoassay of allergens, a preparation method and application thereof. The cleaning solution is composed of HEPES buffer, a triple surfactant system (poloxamer 188, sodium deoxycholate and octyldecyl glucoside), glycerol, PEG8000, disodium EDTA and a composite preservative of Proclin 950 and BHT. The triple surfactant synergistic system is adopted to reduce non-specific adsorption, the HEPES weak alkaline buffer system avoids the inhibition of phosphates on acridinium ester luminescence, and the composite preservative system solves the toxicity and stability problems of traditional preservatives. The cleaning solution can significantly reduce the background luminescence value, the inhibition rate of hemolysis / lipemia / jaundice interference is less than 5%, the detection accuracy deviation is within ±5% (r>0.99), the precision is less than 3.5%, and the room temperature stability is more than 13 months, and the comprehensive performance is better than that of the commercially available products.

This invention relates to a composition for repairing the lipid barrier and its application in sensitive skin care, belonging to the field of cosmetic technology. The composition includes *Plasmodium purpureus* extract, flaxseed extract, senna-based glycosides, and oat extract. The rational combination of these four components not only promotes lipid synthesis but also ensures effective lipid transport and prevents the oxidative degradation of newly synthesized lipids. By covering the entire lipid metabolism process, it achieves a long-lasting and stable barrier repair effect, and can be applied to the repair of the lipid barrier in people with sensitive skin. Efficacy testing shows that the *Plasmodium purpureus* extract, flaxseed extract, senna-based glycosides, and oat extract in the composition can synergistically enhance the composition's antioxidant and lipid synthesis-promoting capabilities, while effectively promoting skin barrier repair and increasing skin moisture content, exhibiting significant skin-soothing and repairing effects, making it highly suitable for people with sensitive skin.

This invention provides a high-toughness thermal insulation epoxy resin, a composite material, and a method for preparing the same. The high-toughness thermal insulation epoxy resin is prepared from raw materials comprising: component A and component B; the mass ratio of component A to component B is 95~150:80~120; component A comprises: 62~150 parts epoxy resin and 8~15 parts toughening agent; component B comprises: 25~45 parts curing agent, 0.3~0.8 parts antioxidant, 12~28 parts additives, and 32~50 parts lightweight filler; the additives are at least one of nano-titanium dioxide and silicon-titanium stacked composite microspheres. The addition of additives to this epoxy resin and composite material allows for synergistic effects with the low thermal conductivity of the lightweight filler, achieving high-efficiency thermal insulation. The additives also absorb energy through interlayer slip and strengthen interfacial bonding through hydrogen bonding with the epoxy resin matrix and glass microspheres, improving the material's mechanical properties. Furthermore, the addition of toughening agents and antioxidants enhances the mechanical properties and anti-aging properties of the composite material.

The invention relates to a graded preparation method of bacteriostatic active components based on multi-color mango peel residues, which comprises the following steps: crushing dried mango peel residues, and carrying out enzymolysis pretreatment by using a compound enzyme system containing cellulase and pectinase; carrying out ultrasonic-assisted extraction by adopting a deep eutectic solvent in which the molar ratio of choline chloride to glycerol is 1: 2, and carrying out centrifugal separation to obtain a crude extract; loading the crude extract on a macroporous adsorption resin column, carrying out gradient elution by using an ethanol-water solution containing 1-3% of hydroxypropyl-beta-cyclodextrin as a protective eluent, and collecting an active fraction; and directly cutting the active fraction into a preparative high performance liquid chromatography system by adopting a column switching technology, collecting a chromatographic peak with the retention time of 14.5-15.5 minutes, and volatilizing a solvent to obtain the targeted malassezia-resistant active component. The method can be used for preparing medicines or cosmetics for inhibiting malassezia.

The invention discloses an environment-friendly thermosensitive coating for a three-proofing PP (polypropylene) synthetic paper label, which comprises an environment-friendly thermosensitive coating body formed by mixing and spraying a plurality of ingredients, the environment-friendly water-based ink is prepared from the following ingredients in parts by weight: 25 to 35 parts of water-based acrylic resin, 10 to 20 parts of polyurethane resin, 10 to 15 parts of environment-friendly pigment, 15 to 30 parts of environment-friendly filler, 8 to 12 parts of sensitizer, 4 to 8 parts of lubricant, 5 to 10 parts of stabilizer, 3 to 5 parts of dispersing agent, 5 to 10 parts of defoaming agent and 10 to 20 parts of color developing agent. The hindered phenol antioxidant and the ultraviolet light absorber are added into the thermosensitive coating, so that the stability of the coating is improved, the thermosensitive coating is high in ultraviolet absorption capacity and good in stability due to use of the ultraviolet light absorber, the outdoor service life of the coating can be effectively prolonged, discoloration, pulverization and aging are prevented, and the service life of the coating is prolonged. Benzoic acid and salicylic acid are added into the thermosensitive coating to serve as color developing agents, so that the thermosensitive coating is environment-friendly and environment-friendly to use, toxicity is low compared with bisphenol A, and harm to a human body is reduced.

The invention provides a superfine fiber regenerated material with a charged gradient structure and a preparation method of the superfine fiber regenerated material, and relates to the technical field of non-woven fabric preparation. The preparation method of the superfine fiber regenerated material comprises the following steps: S1, preparing a cellulose stock solution; s2, forming the cellulose melt-blown non-woven fabric; and S3, recycling the NMMO solvent. The NMMO solution and other organic compound impurities which are not completely reacted can be separated through rectification and purification, and the purity of the NMMO is accurately improved, so that the NMMO reaches a higher quality standard; degradation products such as residual chains can be removed in a targeted manner through micellar enhanced ultrafiltration, so that the quality of NMMO is more stable; impurities such as residual chains, bacteria and metal ions are removed and degraded through rectification and purification, the chemical stability of the NMMO solution is enhanced, and the NMMO solution has better dissolving capacity and chemical stability.

This invention discloses a raw material extraction device for detecting anthocyanin content in pure black rice breeding materials, relating to the field of anthocyanin extraction technology in pure black rice breeding materials. The device includes a main structure comprising an extraction tank. A support is fixedly installed on the bottom surface of the extraction tank, and a tank lid is fixedly installed on the upper surface of the extraction tank. A discharge pipe is fixedly connected to the bottom of the extraction tank, and an extraction processing mechanism is provided on the outside of the extraction tank. This raw material extraction device for detecting anthocyanin content in pure black rice breeding materials, through a grinding and air separation unit, can precisely grind the pure black rice breeding materials using grinding rollers, efficiently separating the rice husks from the rice grains. After filtration through a filter screen, the pure rice grains and seed coats enter the extraction tank through the husks, while the broken rice husk impurities are discharged through the discharge chamber. This achieves automated grinding, screening, and conveying of the raw materials, effectively solving the problem of rice husks hindering the contact between the extraction solvent and anthocyanins.

The invention belongs to the technical field of biological fermentation, and particularly relates to a submerged fermentation extraction process method of ganoderma triterpenic acid. Preparing to obtain a seed solution; preparing a fermentation culture medium, and performing two-stage submerged fermentation on the seed solution to obtain a fermentation solution; filtering and separating the fermentation liquor to obtain mycelia containing intracellular ganoderma triterpenic acid and supernate containing extracellular ganoderma triterpenic acid, drying and crushing the mycelia, and carrying out ultrasonic and enzymolysis synergistic extraction to obtain an extracting solution; mixing the supernate and the extracting solution, filtering to obtain a clear solution, and purifying, concentrating and drying the clear solution to obtain a ganoderma triterpenic acid refined product. The method solves the problem of low yield of ganoderma triterpenic acid caused by uniform mycelium growth and ganoderma triterpenic acid synthesis environment, insufficient carbon source supply and limited induction effect in traditional submerged fermentation through innovative combination of staged fermentation, a fermentation composite carbon source, a composite inducer and beta-cyclodextrin.