52 results about "Reactive oxygen radicals" patented technology

The invention relates to the technical field of organic synthesis, in particular to a preparation method of butynedioic acid. The preparation method of the butynedioic acid comprises the following steps that butynediol is oxidized into the butynedioic acid through pypocholoride and a catalyst, and the catalyst comprises carbon black and a metal compound loaded on the carbon black. According to the invention, butynediol is used as a raw material, and butynediol is oxidized by using pypocholoride and a catalyst to prepare butynedioic acid. Wherein butynediol is easy to obtain, and the raw material cost is low. In addition, the catalyst uses carbon black to immobilize a metal compound, conversion of pypocholoride into a large number of reactive oxygen free radicals can be accelerated, butynediol can be efficiently oxidized under the action of pypocholoride and the catalyst, and the whole synthesis route is safe and green, simple and feasible in process, low in equipment requirement, low in operation cost, free of secondary pollution and low in production cost.

The application discloses an active oxygen response type bacteriostatic and repair promoting hydrogel and a preparation method and application thereof, the hydrogel is formed by disulfide bond cross-linked hydrogel in response to active oxygen free radicals in the vagina of vaginitis patients through thiol modified hyaluronic acid (HASH), and can enhance in-vivo retention by thiol and vaginal tissue interaction. Cationic surfactant such as didecyldimethylammonium chloride (DDAC) as the bacteriostatic component of the hydrogel, efficiently killing pathogenic bacteria while having good biocompatibility, and is not prone to cause bacterial drug resistance. As a natural immune regulator, beta-glucan regulates the vaginal microenvironment, promotes the polarization of macrophages into anti-inflammatory M2 type and promotes cell migration, etc., to promote the repair of the vaginal immune barrier, regulate the vaginal flora, and reduce the probability of vaginitis recurrence. The HASH hydrogel provides an efficient, convenient and highly transformative potential strategy to provide more choices for the treatment of vaginitis.

The application discloses a use of a solute carrier family 25A33 gene in preparation of a medicament for treating presbycusis, and the use is achieved by enhancing SLC25A33 expression on an endolymphatic vascular stripe, by maintaining mitochondrial function stability of pericyte cells around the vascular stripe, by reducing active oxygen free radical (ROS) generation, and by blocking TGFbeta / SMAD pathway-mediated pericyte differentiation, so as to protect the integrity of the blood labyrinth barrier. Animal experiments show that overexpression of SLC25A33 can significantly reduce the hearing threshold of a presbycusis model mouse, protect the structure of the blood labyrinth barrier, and improve the expression of tight junction proteins, and the SLC25A33 gene has the potential to treat presbycusis.

The invention discloses air flotation separation and carbon neutralization wastewater pretreatment integrated equipment, which relates to the technical field of wastewater treatment and comprises a buffer adjusting unit and a catalytic reaction unit which are communicated along the flow direction of wastewater. Through the synergistic effect of integrated buffer adjustment, two-stage air floatation and photocatalysis, the problem that nanoscale colloids are difficult to capture in a traditional air floatation process is effectively solved while the colloid redispersion phenomenon caused by wastewater pH fluctuation is overcome. Specifically, an acid-base environment of wastewater is stabilized through a buffer mechanism of an organic acid component, abnormal changes of charges on the surface of colloid are inhibited, full-scale capture of micron-scale suspended particles and nano-scale colloid is realized by combining dual effects of micron-scale bubble adsorption and reactive oxygen free radicals generated by electrolysis, and the colloid is deeply mineralized through photocatalysis, so that the adsorption efficiency of the colloid is improved. The colloid is effectively intercepted after being oxidized and destabilized, so that the risk that the colloid is re-dispersed due to fluctuation of environmental conditions in a subsequent process is avoided, and the interception effect of the nanoscale colloid in a wastewater pretreatment process is improved.

The invention relates to the technical field of solar cells, in particular to a solar cell, a preparation method thereof and a photovoltaic module, and the preparation method comprises the steps: sequentially forming a composite layer and a hole transport layer on a bottom cell; forming a PbI2 skeleton layer on the hole transport layer, and coating the PbI2 skeleton layer with a cation wet film to prepare a perovskite light absorption layer; wherein the cationic wet film comprises an anthocyanin antioxidant and a cationic material. According to the preparation method, an anthocyanin antioxidant is introduced into cations to inhibit cation deprotonation and iodide ion oxidation processes, defects formed in the perovskite light absorption layer are reduced, and the film forming quality of the perovskite light absorption layer is improved; and meanwhile, active oxygen free radicals on the surface of the perovskite light absorption layer can be removed, and the problem that the perovskite light absorption layer is easy to accelerate degradation due to water and oxygen in the air is solved, so that the efficiency and the stability of the prepared solar cell are improved.

This invention discloses a near-infrared light-responsive porous membrane, its preparation method, and its applications, relating to the field of dressing technology. The near-infrared light-responsive porous membrane is composed of polyurethane, PDA@ZnO nanoparticles, and the antibacterial agent QCS. Under near-infrared light excitation, this near-infrared light-responsive porous membrane can generate reactive oxygen free radicals and heat, and release biofunctional zinc ions. Addressing the clinical challenges of chronic wounds, such as their susceptibility to infection and slow healing, this invention provides a new approach to improving the clinical treatment of chronic wounds by using a PDA@ZnO / QCS / TPU porous membrane that achieves highly efficient and precise sterilization under the synergistic effect of specific wavelengths of light, thereby preventing wound infection and promoting wound healing.

The invention discloses a CoS2 (at) TCPP-Co nano composite material as well as a preparation method and application thereof, and relates to the technical field of rapid detection of nano enzyme materials and efficient degradation of fungaltoxin. The preparation method of the CoS2 (at) TCPP-Co nano composite material comprises the following steps: dissolving cobalt nitrate and sodium thiosulfate in water, adding ethylene glycol and ethanol, stirring and heating to react, centrifuging, washing and drying a solid to obtain CoS2. The preparation method comprises the following steps: dissolving tetra (4-carboxyl phenyl) porphin and polyvinylpyrrolidone in N, N-dimethylformamide and absolute ethyl alcohol, uniformly mixing, adding CoS2, carrying out a constant-temperature reaction, and finally centrifuging, washing and drying to obtain the CoS2 atTCPP-Co nano composite material. The composite material shows excellent peroxidase-like activity, and can be coupled to a ligand to realize rapid quantitative detection of AFB1. In addition, reactive oxygen free radicals generated by the CoS2 (at) TCPP-Co in the catalytic reaction can efficiently destroy the molecular structure of AFB1, so that effective degradation of the toxin is realized.

The invention relates to a method for detecting pesticide based on a ferriporphyrin modified covalent organic framework nano-enzyme sensing array. According to the invention, ferriporphyrin molecules are loaded on a porous and ordered COFs skeleton, so that excellent peroxidase simulated catalytic activity is realized, H2O2 can be catalyzed to be decomposed to generate reactive oxygen free radicals, and TMB, OPD and ABTS chromogenic reactions are catalyzed. Based on the performance, a three-channel colorimetric sensing array is constructed to detect and distinguish various pesticides such as malathion, profenofos, chlorpyrifos, acephate and dimethoate, and the detection limit is as low as 0.341 nM. After different pesticides are adsorbed to active sites, catalytic reaction can be remarkably inhibited, and specific colorimetric fingerprint signals are generated. Colorimetric data is further combined with a machine learning algorithm, high-accuracy classification and recognition of single pesticides and mixtures thereof are achieved by means of a multilayer sensor, a support vector machine, a random forest and other models, the classification accuracy of an MLP model reaches 90%, ROC curve AUC exceeds 0.97, and the reliability of the detection method is proved.

The invention discloses an anti-aging ganoderma lucidum polysaccharide-milk composition and a preparation method and application thereof.The preparation method includes the steps that ganoderma lucidum sporocarp serves as a raw material, after superfine pretreatment is conducted, ganoderma lucidum polysaccharide is extracted in a free radical mediation mode, the polysaccharide yield is effectively increased, and the activity of the polysaccharide is effectively improved; and then active oxygen free radicals (. OH) and active nitrogen free radicals (DPPH) are respectively used as indexes to preferably select the ganoderma lucidum polysaccharide-milk composition with the optimal synergistic interaction ratio, so that the antioxidant activity of the ganoderma lucidum polysaccharide is improved. The ganoderma lucidum polysaccharide-milk composition preferably selected by the method disclosed by the invention not only has the nutritional values of polysaccharide and milk, but also synergistically enhances free radical scavenging, oxidative stress resistance and aging resistance, so that high-quality utilization of ganoderma lucidum and milk is realized.

The invention relates to the field of leather, in particular to oxidation-aging-resistant anti-cracking leather and a preparation method thereof. The method is used for solving the problems that existing leather is extremely prone to oxidation aging and cracks are generated. According to the leather, the phenolic hydroxyl isoquinoline, the benzophenone p-phenylenediamine and the modified polyurethane emulsion are used as coatings, and phenolic hydroxyl groups in phenolic hydroxyl isoquinoline molecules have good hydrogen atom transfer capacity and are combined with reactive oxygen free radicals generated in the leather oxidation process; benzophenone-based p-phenylenediamine has good ultraviolet absorption capacity and anti-aging capacity, a cross-linked network exists in the modified polyurethane emulsion, so that the anti-cracking performance of leather is improved, and the surface of the leather is coated with the modified polyurethane emulsion, so that the finally prepared leather material has excellent oxidation aging resistance and anti-cracking characteristics; and the durability and the use comfort of the product are improved.

The invention provides a metal organic framework for removing reactive oxygen free radicals in cigarette smoke as well as a preparation method and application of the metal organic framework. The metal organic framework comprises a three-dimensional porous organic framework formed by coordination assembly of organic ligands and metal ions, the organic ligand comprises any one of 2-methylimidazole, 1-methylimidazole and 2-nitroimidazole; the organic ligand comprises any one of 2-methylimidazole, 1-methylimidazole and 2-nitroimidazole; the metal ions comprise cerium ions and manganese ions; the molar ratio of the organic ligand to the metal ions is (20-30): (80-95); the molar ratio of the cerium ions to the manganese ions is (35-43): (45-52). In the metal organic framework provided by the invention, an organic ligand is used as a basic framework, metal ions are used as connecting nodes, and the formed nano structure has activity similar to catalase and superoxide dismutase, is high in thermal stability and large in specific surface area, can effectively catalyze and remove reactive oxygen free radicals in cigarette smoke, and can be used for preparing cigarette smoke. The harm of cigarette smoke to a human body is reduced.

The application belongs to the technical field of antibacterial infection materials, and particularly relates to preparation and application of a biomimetic mineralization nanoparticle. x S y / AZM, which is obtained by fixing glucose oxidase (GOx) in FexSy nanoparticles hybridized with azithromycin (AZM) through a biomimetic mineralization strategy, and the nanoparticle GOx@Fe x S y / AZM serves as a therapeutic drug to catalyze a large amount of active oxygen free radicals (ROS) to improve inflammatory response in order to rapidly kill infectious microorganisms in the early stage of bacterial infection of a wound surface; and in the subsequent healing period, H2S released by the material and AZM will jointly promote the polarization of macrophages to M2 macrophages of a repair type to effectively mediate the tissue repair after a high inflammatory response, so that the ordered treatment of a high blood sugar infection wound surface is achieved.

The invention relates to the field of cosmetics, in particular to sunscreen powder slurry, a preparation method thereof and a sunscreen cosmetic. The sunscreen powder slurry comprises a yeast melanin solution, sunscreen powder, a dispersing agent, an emulsifying agent and grease; the proportion of the yeast melanin solution in the sunscreen powder syrup is 0.00001%-10%; the sunscreen powder accounts for more than 50% of the sunscreen powder syrup; the sunscreen powder comprises any one of unmodified titanium dioxide, modified titanium dioxide, unmodified zinc oxide or modified zinc oxide; the average particle size of the sunscreen powder in the sunscreen powder slurry is 100-380 nm. The melanin has the capability of scavenging free radicals, and can be used as an additional defense line to quench reactive oxygen free radicals generated after the skin is irradiated by ultraviolet rays, so that secondary light protection is provided, and the light aging damage of the skin is relieved. The particle size of the particles is far smaller than the wavelength of visible light, and scattering of the visible light is weakened, so that the false white feeling is remarkably relieved, and the skin feeling is more natural and transparent.

The invention relates to a combined treatment method for tumors in a diabetic state, and belongs to the field of biological medicines. According to the method, photodynamic therapy is carried out by adopting photosensitive composite nanoparticles (UCS NPs) constructed by upconversion nanoparticles-silicon dioxide-chlorin e6, and an inhibitor for inducing a metastasis pathway by aiming at tumor-related fibroblasts is used in a combined manner. Active oxygen free radicals are generated through photodynamic therapy to kill tumor cells, and an inhibitor is combined to block a metastasis pathway, so that tumor growth and metastasis are synergistically inhibited in a diabetes mellitus high-glucose microenvironment. The problem that the curative effect of a single therapy is limited under the complex state of diabetes mellitus is solved, and the pharmaceutical composition has the advantages of strong synergistic effect, high targeting property, good biological safety and the like, is suitable for treating diabetes mellitus complicated with melanoma, and has a wide clinical application prospect.

This invention relates to the field of thin film technology, specifically providing a polymer thin film and its manufacturing method, comprising the following raw materials in parts by weight: 48-52 parts of recycled polypropylene (rPP), 38-42 parts of polybutylene adipate-butylene terephthalate (PBAT), 7-9 parts of surface-aminated modified nanocellulose whiskers (CNC, diameter 20-30 nm), and 1.2-1.8 parts of bio-based interface stabilizer. This invention utilizes maleic anhydride grafted lignin to form a three-dimensional hydrogen bond network with rPP / PBAT. DSC measurements show a phase separation temperature difference ΔT = 35℃ and an interfacial peel strength of 13.2 N / cm. The synergistic effect of the epoxy-functionalized castor oil ring-opening reaction and the release of reactive oxygen free radicals from mesoporous zinc oxide (6-10 nm) increases the gel content to 72%. Hindered amine additives are released slowly through the mesoporous zinc oxide nanopores, blocking the PBAT ester hydrolysis chain reaction, resulting in a 60% reduction in the measured hydrolysis rate. A temperature path of 155℃→210℃→160℃ is used, with a melt viscosity fluctuation rate of ±2.5%, solving the problem of a narrow processing window caused by the heat sensitivity of PBAT.

The application discloses an antibacterial tourniquet, which is prepared by mixing modified polycaprolactone, zinc oxide and DMF to obtain a spinning solution, electrospinning the spinning solution, drying and cutting to obtain the tourniquet. The modified polycaprolactone contains a quaternary ammonium salt structure. The quaternary ammonium salt can adsorb bacteria with negative electricity through the cation itself and insert the hydrophobic group into the lipid layer of the cell membrane, resulting in the dissolution of the bacterial envelope and the release of the contents, and further causing the death of the bacteria. When the tourniquet is exposed to light, the zinc oxide generates active oxygen free radicals, thereby destroying the bacterial cell membrane, so that the tourniquet has good antibacterial effect. Meanwhile, the modified polycaprolactone contains a cyclodextrin structure. The cyclodextrin is embedded in the molecular skeleton as a sacrificial conformation. When the material is subjected to external force, the conformation of the cyclodextrin changes, thereby consuming energy. Meanwhile, the hyperbranched distribution of the polysiloxane segment and the polycaprolactone greatly improves the mechanical properties of the material, thereby increasing the durability of the tourniquet.

The application provides a plasma processing device and method suitable for sterilizing the surface of dried vegetables, wherein the high-voltage electrode is a plurality of strip-shaped metal strips, the distance between two adjacent strip-shaped metal strips is a certain distance, the plurality of strip-shaped metal strips are close to the inner wall surface of a quartz glass sleeve, the first grounding electrode is a cylinder coaxial with the quartz glass tube, the inside of the cylinder is hollow, one end of the cylinder is closed, the other end of the cylinder is connected with a gas pump, and a gas hole is arranged on the wall of the cylinder at a certain interval. The outer surface of the quartz glass tube is close to a circle of second grounding electrodes. The application provides a plasma processing device suitable for sterilizing the surface of dried vegetables, which uses high-energy electrons, active substances such as active oxygen and free radicals generated by low-temperature plasma to replace the traditional ultraviolet and ozone sterilization method, so as to realize the sterilization of dried vegetables. The whole device has a simple structure, thereby reducing the sterilization cost.

The invention discloses a method for extracting bamboo leaf flavonoid and preparing a bamboo leaf flavonoid health-care beverage and beverage, and particularly relates to a method for preparing the bamboo leaf flavonoid health-care beverage and beverage by using nine high-benefit bamboo varieties in southern China as raw materials. The high-temperature-resistant coating is prepared from the following raw materials in parts by weight. The components comprise 70 parts of flavonoid compounds and other effective active substances extracted from dry bamboo leaf fragments by adopting a complex enzyme-microwave method, 16 parts of polysaccharide extracted from hericium erinaceus by adopting a conventional hot water extraction method, 17 parts of effective active substances extracted from plumbago indica by adopting hot water, 9 parts of eurycoma longifolia, 26 parts of effective active substances of beautiful millettia roots and 15 parts of effective active substances of polygonatum kingianum. The bamboo leaf flavonoid health-care beverage and the bamboo leaf beverage integrate the nutrients and other effective components of the bamboo leaf flavonoid and the hericium erinaceus and plumbago indica extract liquor, become an excellent bamboo leaf flavonoid health-care beverage and the bamboo leaf beverage, and have the effects of eliminating various types of reactive oxygen free radicals and inhibiting lipid peroxidation after being drunk usually; the vitamin C can protect brain blood vessels, block nitrosation reaction and eliminate nitrous ammonia, and can resist fatigue and aging as vitamin C.

The invention discloses a sunscreen synergistic composition as well as a preparation method and application thereof, and belongs to the technical field of daily chemicals. The sunscreen synergistic composition comprises a composite light stabilizer and physalis pubescens juice, the composite light stabilizer comprises butyl octanol salicylate, an acrylic acid (ester) copolymer, 2, 6-diethyl hexyl naphthalate and caprylic / capric triglyceride. The compound light stabilizer obtained by compounding butyl octanol salicylate, acrylic acid (ester) copolymer, 2, 6-diethyl hexyl naphthalate and caprylic / capric triglyceride can improve the conversion rate of the sun-screening agent; energy generated by the sun-screening agent capable of absorbing light in an excited state can be removed through an energy transfer and / or electron transfer quenching mechanism, and photodegradation and formation of reactive oxygen free radicals are reduced; the physalis pubescens juice is added and compounded with the compound light stabilizer, so that the light absorption capacity of the sun-screening agent is improved, the sun-screening value is further increased, meanwhile, skin problems are reduced, and heat damage is reduced.

The application discloses a zinc oxide quantum dot composite disinfectant and sterilization spray and a preparation method and application thereof. The spray takes high-stability single-crystal zinc oxide quantum dots with a particle size of 2-10 nm as a core antibacterial component, is compounded with pet-safe surfactants (such as alkyl glycoside), and is supplemented with a pH buffer and a stabilizer. Through a triple synergistic mechanism of zinc ion release, active oxygen radical production and nano penetration, the spray realizes broad-spectrum and efficient killing (>99.9%) of microorganisms such as bacteria and viruses. The product is colorless and odorless, is safe and non-irritating to pets, does not need to be rinsed after use, can be naturally air-dried, and can form an antibacterial film with a long-acting protection of 7-14 days on the surface of an object. The application solves the problems of traditional disinfectants, such as great toxicity, secondary cleaning and drug resistance, and is particularly suitable for convenient, safe and long-acting disinfection of pet products and home environments.

The invention relates to a spray head and a method for killing respiratory pathogens by active oxygen free radical liquid drops. The spray head comprises a spray head rotating device, a spray head runner shell and an OH solution inlet, the device comprises an H < 2 > O < 2 > solution inlet, an H < 2 > O < 2 > solution diversion chamber, an OH solution flow channel and two H < 2 > O < The OH solution and the H2O2 solution are subjected to flow stabilization-acceleration through the flow stabilization cavity in the spray head and then jetted into a beam of OH liquid drops and two beams of H2O2 liquid drops through the high-pressure jet flow V-shaped spray nozzle, the H2O2 liquid drops are distributed on the two sides of the OH liquid drops, escaping oxygen active particle gas is captured, the three beams of liquid drops jointly expand and extend downwards and gradually intersect, collide and mix, the OH liquid drops with the higher concentration are generated, and the oxygen active particle gas with the higher concentration is generated. And all-around 100% disinfection and killing of viruses on the surface of an object can be realized within 10 seconds.

The application discloses an mTOR inhibitor with a porous nano structure and a preparation method and pharmaceutical application thereof, and belongs to the technical field of biological medicines. 3+ The application obtains a nano catalyst targeting mTOR through aqueous phase synthesis, and a cerium phytate nanoparticle formed by coordination of phytic acid and cerium ions carries a large number of Ce The large number of holes in the material effectively promote adsorption of active oxygen free radicals, so that the cerium phytate has high efficient antioxidant performance and can be applied to treatment of various diseases related to active oxygen. In addition, phytic acid, as a ligand molecule constituting the cerium phytate, has six phosphate groups and can efficiently coordinate with cerium ions to form the cerium phytate material. Phytic acid also has anti-inflammatory, antioxidant and lipid metabolism regulating activities and can effectively enhance the antioxidant performance of the cerium-based material in the body. Therefore, the mTOR inhibitor prepared by the application has good biocompatibility and anti-inflammatory and antioxidant activities and is expected to be used for disease treatment.

The invention relates to the technical field of detergents, and discloses a graphite carbon coated bimetallic-based photocatalytic antibacterial detergent and a preparation method thereof, the graphite carbon coated bimetallic-based photocatalytic antibacterial detergent comprises the following components by weight: 0.1-1.0% of a NiO / PdO coated C nano composite material; 7%-25% of an anionic surfactant; 5%-10% of a nonionic surfactant; 0.5%-2% of a chelating agent; 0.1%-1.5% of an enzyme preparation; 0.3%-1% of a conditioning agent; and the balance of deionized water. The NiO / PdO-C nano composite material can efficiently generate reactive oxygen free radicals through the unique bimetallic heterojunction effect under the irradiation of visible light or sunlight, the strong oxidizing free radicals can thoroughly decompose chromophoric groups of stubborn organic pigments and destroy microbial cell structures, meanwhile, the graphite carbon layer tightly wraps the internal NiO / PdO active center, and therefore the catalytic activity of the NiO / PdO-C nano composite material is improved, and the service life of the NiO / PdO-C nano composite material is prolonged. And agglomeration and inactivation of nanoparticles can be prevented, and the service life of the product is prolonged.

The application discloses a kind of corona discharge ion wind auxiliary chemical mechanical polishing processing method for ceramic, comprising the following steps: step S1, ceramic workpiece is immersed in alkaline abrasive liquid;Step S2, ion wind is released using ion wind generating device, ceramic workpiece is in ion wind covered area, ion wind generating device is installed in the spindle support of grinding machine tool, ion wind generating device moves together with spindle, so that ion wind released by ion wind generating device is aligned with the processing area of ceramic workpiece in real time;Step S3, active oxygen free radicals contained in ion wind dissolve into alkaline abrasive liquid, and continuously occur chemical reaction with ceramic workpiece surface in processing process and produce soft layer, under the stable state of ion wind, ceramic workpiece surface is polished.The application provides a kind of corona discharge ion wind auxiliary chemical mechanical polishing processing method for ceramic, improves material removal efficiency, while improving surface quality and inhibiting surface damage, and regulates wettability.

The application belongs to the technical field of hematin quantitative detection, and specifically discloses application of methylene blue cyclopropyl formylated derivative as a chromogenic substrate for detecting hematin, and uses methylene blue cyclopropyl formylated derivative AMB as a chromogenic substrate for detecting hematin Hemin; compared with a classical substrate TMB, the methylene blue cyclopropyl formylated derivative AMB of the application has higher sensitivity in the detection of hematin Hemin; in addition, the amino protons of the methylene blue cyclopropyl formylated derivative AMB of the application are fully substituted by methyl, which inhibits the participation of active oxygen free radicals in oxidation, but is still sensitive to the oxidation pathway of ferric free radicals, has better selectivity compared with TMB, and the AMB system can effectively detect hematin Hemin in a serum sample. Therefore, it can be said that for the detection of hematin Hemin, AMB is a more excellent colorimetric substrate than TMB.

The invention discloses a spermidine composition for inhibiting aging of hair follicle stem cells and promoting growth period entry and application, and relates to the technical field of biological medicine and functional skin care. The invention discloses a spermidine composition for inhibiting aging of hair follicle stem cells and promoting growth period entry. The skin care product is prepared from the following components in parts by mass: 0.5 to 3 parts of spermidine, 0.2 to 2 parts of an autophagy activator, 0.5 to 4 parts of an antioxidant, 0.1 to 2 parts of a mitochondrial function accelerant, 0.2 to 3 parts of a microcirculation accelerant, 1 to 6 parts of a skin penetration accelerant, 0.2 to 1 part of a preservative, 0.05 to 0.4 part of a pH regulator and 60 to 95 parts of a carrier matrix. The composition can effectively reduce the aging rate of hair follicle stem cells and remarkably improve the proliferation activity of the hair follicle stem cells, active oxygen free radicals around the hair follicle stem cells can be effectively removed by adding the antioxidant of a novel structure, damage of external stimulation to hair follicles is reduced, and a systematic cell protection and repair mechanism is formed.

The invention provides a saline-alkali resistant protective agent for pasture crops and a use method thereof. Based on the synergistic effect of jasmonic acid methyl ester, glucose, monopotassium phosphate and fulvic acid, two application modes of seed soaking or leaf surface spraying can be flexibly adopted according to planting requirements, and the multiple physiological regulation function of alfalfa and oat plants in the saline-alkali environment is achieved. The protective agent can activate plant stress-resistant gene expression pathways, effectively remove reactive oxygen free radicals caused by saline-alkali stress, reduce damage of oxidative stress to cell membranes, remarkably improve the activity level of an antioxidant enzyme system, synchronously promote biosynthesis of osmotic regulation substances, synergistically solve ion poison, osmotic stress and energy deficiency and improve the survival rate of plants. Therefore, chloroplast pigment content is effectively increased, and plant photosynthesis efficiency is enhanced. According to the invention, a'molecule-cell-rhizosphere 'multi-stage defense mechanism is formed through the synergistic matching effect of the components, and the saline-alkali resistant agent has the advantages of good saline-alkali resistant effect, low cost and high environmental compatibility.

The application discloses a preparation method and application of an interlayer limited Co single-atom catalyst, and the method comprises the following steps: firstly, embedding a cobalt single atom at the center of a porphyrin ring to obtain a porphyrin ligand embedded with the cobalt single atom; and then, combining a cluster metal ion with the porphyrin ligand embedded with the cobalt single atom by using a one-step organic solvent thermal synthesis method to prepare a porphyrin-based metal organic framework CoSAs-PMOF, namely the interlayer limited Co single-atom catalyst. The interlayer limited Co single-atom catalyst is used for activating hydrogen peroxide to generate active oxygen free radicals dominated by singlet oxygen, and then degrading ciprofloxacin. The application provides a new method for degrading ciprofloxacin.

The invention discloses a preservation method for improving the oxidation resistance of cherry tomatoes through electrical stimulation, and belongs to the technical field of preservation. According to the method, the cherry tomatoes are treated in the specific pulsed electric field, the cherry tomatoes are treated in the low-voltage pulsed electric field, mild adversity stress is successfully simulated, the fruits are induced to generate reactive oxygen free radicals as signal molecules, and therefore an endogenous antioxidant defense system of the fruits is systematically activated. Meanwhile, the activity of superoxide dismutase and catalase is increased synergistically, and DPPH and ABTS free radical scavenging ability is maintained at a relatively high level in the whole storage period, so that the technical scheme shows that the pulsed electric field treatment system is excellent in operability, not only can the postharvest aging of the cherry tomatoes be effectively delayed, but also the nutritional quality of the cherry tomatoes can be remarkably maintained, and the shelf life of the cherry tomatoes can be prolonged.

The application belongs to the field of nano new energy materials, and discloses a preparation method of BaTiO3 / GDY / Au piezoelectric enhanced photocatalyst and application thereof. The catalyst is prepared by first synthesizing barium titanate nanofibers with piezoelectric effect through an electrospinning method, then growing thin graphdiyne nanosheets on the surface of the barium titanate, and finally growing gold nanoparticles with a local surface plasmon resonance effect on the surface of the graphdiyne to obtain barium titanate / graphdiyne / gold nanofibers. Under the combined stimulation of light and ultrasound, the barium titanate / graphdiyne / gold nanofiber catalyst can promote the generation of a large number of active oxygen free radicals, thereby removing organic pollutants and pathogens in wastewater. The application can solve the problems of low catalytic activity and poor stability of the catalyst, and can quickly remove organic pollutants and pathogens in wastewater.