11179 results about "Hydrolysis" patented technology

Improved performance ion exchange membranes for use in REM, AEM and DMFC fuel cells, buffered fuel cells, hydrolysis, other applications comprise a molecular matrix of homopolymers, di-monomer, heteropolymers, copolymers, or block-polymers of fluorocarbon and hydrocarbon compounds combined with (i) skeletal support grid to improve durability, handling, reduce membrane swelling, and sequester dopants and nanoparticles from leakage; (ii) microporous membrane formed using a sacrificial filler process enhancing conductivity and limiting fuel crossover; (iii) hetero-ionomeric matrix of two-or-more membrane-bound acids e.g. sulphonic and phosphonic acid expanding usable range; (iv) permanent fillers enhancing conductivity and porosity including nanoparticles, metal-oxides, zeolites, silicates, GOs, CNTs, MOFs, POSS, and others; (v) ionic liquid doping to enhance membrane conductivity; (vi) membrane nanocoating preventing H2O2 diffusion; and / or (vii) catalytic nanocoating with metals, metal-oxides, and MOFs preventing atmospheric toxin catalyst poisoning. Combined with a heterogenous GDI, the IEM is integrated into iBFC power blade and energy bank applications.

The invention discloses a high temperature and high pressure resistant electric power tube and a preparation method thereof, the electric power tube comprises the following raw materials by weight: 100-120 parts of polyethylene master batch, 5-10 parts of a modifier, 0.5-1 part of benzoyl peroxide and 20-30 parts of a modified filler, in a melt extrusion process of the raw materials, a maleimide structure on a molecular side chain of the modifier can be grafted with a polyethylene molecular chain, and the molecular chain of the modifier can be grafted with the polyethylene molecular chain. Meanwhile, an organic silicon chain segment and a benzene ring structure are added in a polymer molecule, the high-temperature-resistant effect of the material is improved, after reflux treatment in water, a siloxane structure in the modified filler and a siloxane structure in a modifier molecule can be subjected to hydrolytic condensation, and therefore the high-temperature-resistant and high-pressure-resistant effects of the material are improved. According to the invention, polyhedral oligomeric silsesquioxane is taken as a core, boron nitride is taken as a shell to form a core-shell structure, and the three-dimensional grid structure of the polymer can greatly improve the high-temperature-resistant and high-pressure-resistant effects of the polymer.

The invention discloses a preparation method of a fluorine-containing carbazole phosphonic acid compound, which solves the technical problems of harsh reaction conditions, high raw material price and low yield in the existing preparation process, 4-trifluoromethoxyaniline and 4-trifluoromethoxyiodobenzene are used as initial raw materials, and Ullmann reaction is performed under a solvent-free condition to obtain 4, 4 '-difluorocarbazole phosphonic acid. The preparation method comprises the following steps: taking 3, 4 '-bis (trifluoromethoxy) diphenylamine as a raw material, carrying out palladium acetate catalytic oxidation cyclization to obtain 3, 6-bis (trifluoromethoxy) carbazole, reacting the 3, 6-bis (trifluoromethoxy) carbazole with 2-bromoethyl dimethyl phosphonate to obtain N-(2-ethyl dimethyl phosphonate) 3, 6-bis (trifluoromethoxy) carbazole, and finally hydrolyzing to obtain the N-(2-ethyl phosphonate) 3, 6-bis (trifluoromethoxy) carbazole. The reaction process is simpler to operate, the yield is guaranteed, and the method is suitable for large-scale production. In the preparation method disclosed by the invention, a solvent is not required to be used in multiple steps, the reaction is performed under a solvent-free condition, and the preparation method is high in safety and environment-friendly.

Provided are a new compound capable of forming a surface treatment layer having excellent abrasion resistance, a method for producing the same, a composition and a surface treatment agent which contain said new compound, an article that has a surface treatment layer having excellent abrasion resistance, and a method for producing the same.　This compound is represented by formula (1) or formula (2).　(1): [R1-Q1-(SiR2 2-O)p1]q1-SiR2 q2-Q2-Z1-Si(R3)nL1 3-n (2): L1 3-n(R3)nSi-Z1-Q2-SiR2 2-O-(SiR4 2-O)p2-SiR2 2-Q2-Z1-Si(R3)nL1 3-n Wherein, R1 represents (R11)3Si- or the like, R11 represents a hydrocarbon group or the like, Q1 represents an oxygen atom or the like, R2 represents a hydrocarbon group, R3 represents a hydrocarbon group, R4 represents a hydrocarbon group or the like, p1 represents a number of 0-500, p2 represents a number of 0-500, q1 represents 1-3, q2 represents 0-2, q1+q2 equals 3, Q2 represents a single bond or the like, Z1 represents an alkylene group having 7-100 carbon atoms, L1 represents a hydrolyzable group or the like, and n represents 0-2.

The invention relates to the technical field of organic synthesis, in particular to a method for constructing Orforglipron pyran ring chirality through enzyme catalysis, which comprises the following steps: step S1, taking SM1 and SM2 as raw materials, and reacting under the action of a palladium catalyst and a ligand to obtain INT-1; step S2; carrying out hydrogenation reduction on double bonds of the INT-1 under the catalysis of Pd / C to obtain INT-2; s3, carrying out hydrolysis resolution on the INT-2 in a solvent, a buffer salt system and enzyme catalysis to obtain a chiral pure intermediate INT-3; step S4, performing ring closing on the INT-3 through a Grignard reaction to synthesize a lactone intermediate INT-4; and S5, carrying out Diball-H reduction, quenching, dichloromethane extraction and anhydrous sodium sulfate drying on the INT-4, and then reducing by using triethyl silane to obtain the compound with the general formula A. Chirality is constructed through enzyme catalysis, isomer impurities do not need to be split and separated through SFC when the chirality is constructed, loss is reduced, the yield is increased, and a target product is obtained with high yield and high chiral selectivity; meanwhile, the cost is relatively reduced, and the cost is saved.

The invention belongs to the technical field of bipolar membranes, and particularly relates to a bipolar membrane containing a hydroxyl MOF catalyst middle layer and a preparation method and application of the bipolar membrane. The high-performance and high-stability heterogeneous bipolar membrane is prepared by taking anion and cation exchange resin as an exchange group of the bipolar membrane, adding an adhesive and taking an MOF material containing a hydroxyl group as a water dissociation catalyst. The raw materials are low in cost and wide in source and have excellent ion exchange capacity, and the prepared bipolar membrane is better in performance and simple in manufacturing process. The hydroxyl MOF water dissociation catalyst simultaneously contains a hydroxyl group and a metal group, so that the specific surface area of the catalyst can be effectively prolonged, transfer of protons from water molecules to fixed charge groups is enhanced, and water dissociation in a bipolar membrane is accelerated. By adding the adhesive and the carbon-containing woven fabric fibers, the stability of the membrane structure is enhanced, the service life of the membrane is prolonged, and the mechanical property and the conductivity of the bipolar membrane are effectively improved.

The invention relates to the technical field of enzyme engineering, in particular to an aminopeptidase mutant, a preparation method of the aminopeptidase mutant and application of the aminopeptidase mutant to preparation of L-carnosine. The aminopeptidase mutant is obtained by mutating wild type aminopeptidase and can be used for preparing the L-carnosine through reverse hydrolysis of beta-alanine methyl ester and L-histidine. The L-carnosine produced by using the aminopeptidase mutant disclosed by the invention has the following advantages: 1, the conversion rate is greater than or equal to 95%, the conversion time is short, and relatively cheap alanine methyl ester can be used as a raw material to catalytically prepare the L-carnosine; 2, the production process is simple, the reaction conditions are mild, and the green chemistry concept is met;

The invention discloses a xanthine oxidase inhibitory peptide with uric acid reducing activity and application thereof, and belongs to the technical field of biological medicines.The xanthine oxidase inhibitory peptide is obtained by conducting enzymolysis, separation and purification on processing byproducts such as litopenaeus vannamei heads and shells with xanthine oxidase inhibitory activity. The xanthine oxidase inhibitory peptide is screened by using a molecular docking technology, and the amino acid sequence of the xanthine oxidase inhibitory peptide is Pro-Pro-Val-Pro-Pro-Pro. The xanthine oxidase inhibitory peptide has an XOD (X-Oxidase) half inhibitory concentration of 3.181 + / -0.1786 mM. The invention further proves that the xanthine oxidase inhibitory peptide has a certain improvement effect on hyperuricemia mice, and the xanthine oxidase inhibitory peptide mainly has the effects of reducing the content of serum uric acid, creatinine and urea nitrogen of the hyperuricemia mice, inhibiting the activity of xanthine oxidase (XOD) in serum and liver of the mice, inhibiting synthesis of uric acid and improving kidney injury of the mice, and the xanthine oxidase inhibitory peptide has a certain improvement effect on the hyperuricemia mice through Toxinpred prediction. The xanthine oxidase inhibitory peptide uric acid reducing peptide is free of toxic and side effects and has a wide market application prospect.

The invention relates to a high-yield lipase strain and application thereof, and belongs to the technical field of bioengineering. According to the invention, grease-rich samples from different sources are subjected to enrichment treatment, a strain with lipase activity reaching 80.8 + / -1.8 U / mL is obtained through neutral red grease plate screening, the strain is identified as Burkholderia cepacia OCRI-Lip100 through sequencing and sequence comparison, the Burkholderia cepacia OCRI-Lip100 is named as Burkholderia cepacia OCRI-Lip100, and the Burkholderia cepacia OCRI-Lip100 is preserved in China Center for Type Culture Collection on July 3, 2024 with a preservation number of CCTCC M20241369. Lipase obtained by fermentation of the strain is sequenced, enzymatic properties, catalytic activity and substrate preference of the lipase are studied, the optimum catalytic temperature is 60 DEG C, the specific enzyme activity is higher than that of commercial lipase, the catalytic activity is further improved to 116 + / -0.5 U / mL when a C14 substrate is catalyzed, and triglyceride can be hydrolyzed into diglyceride. The strain provided by the invention and the lipase produced by the strain enrich the resource library of the existing lipase, and provide a basis for improving the industrial application of the lipase and realizing the high utilization rate of resources.

The invention discloses a crystalline polyaryletherketone surface grafted carbon fiber and a preparation method thereof, and belongs to the technical field of carbon materials.The preparation method comprises the following steps that an amino end-capping reagent containing sulfuryl, a difluoro monomer, a bisphenol monomer and potassium carbonate are placed in sulfolane to be subjected to a polymerization reaction, and amino-terminated polyarylether is obtained; carrying out diazonium salt reaction on the amino-terminated polyarylether and nitrite tetrafluoroborate to obtain diazonium salt-terminated polyarylether; connecting the carbon fiber with a cathode, immersing the carbon fiber in an electrolyte containing diazonium salt terminated polyarylether, and applying a reduction potential for reaction to obtain polyarylether grafted carbon fiber; and carrying out hydrolysis reaction on the carbon fiber grafted with polyarylether in an acid environment to obtain the crystalline polyaryletherketone surface grafted carbon fiber. According to the crystalline polyaryletherketone surface grafting modified carbon fiber prepared by the invention, the carbon fiber is directly connected with a polymer through high-temperature-resistant and corrosion-resistant phenyl and sulfuryl, so that the crystalline polyaryletherketone surface grafting modified carbon fiber has better high-temperature resistance and corrosion resistance.

The invention relates to the technical field of high polymer materials, and particularly provides a self-repairing type UV curing alumite color layer coating and a preparation method thereof. The water-based ink is prepared from, by weight, 30-50 parts of polyurethane acrylic resin, 10-25 parts of modified acrylic oligomer containing dynamic covalent bonds, 2-5 parts of photoinitiator, 3-8 parts of hydrophobic modified nano filler and 1-3 parts of cross-linking agent, and the dynamic covalent bonds are selected from at least one of hydrazide bonds, boric acid ester bonds and Diels-Alder bonds. By introducing a gradient energy collaborative network of dynamic covalent bonds and quadruple hydrogen bonds, rapid self-repairing of the coating at normal temperature and thermal triggering recombination of deep damage are achieved, and meanwhile through the micro-phase separation design of the hydrophobic core-shell filler and the graft modified silicon carbide nanowires, the hydrolysis resistance is improved.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to improve the growth of corn under low temperature conditions. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then infused to the soil containing the corn seeds, the solution can also be sprayed to the leaf surface of corn plants at a specific growth stage. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, for applying to the soil and for spraying to leaf surface of corn seedlings / plants.

The invention discloses a nano blocking agent for drilling fluid and a preparation method thereof, and belongs to the technical field of blocking agents, the nano blocking agent for drilling fluid is prepared by reaction of a core layer blocking agent and a shell layer blocking agent, the core layer blocking agent is prepared by reacting nano silicon dioxide, gamma-methacryloxypropyltrimethoxysilane and a first part of vinylphosphonic acid, and has secondary blocking capability; and the shell blocking agent is prepared by reacting a second part of vinyl phosphonic acid, styrene and 2-dodecene-1-yl succinic anhydride, and has the characteristic of flexibility. The nano plugging agent has rigid supporting and flexible deformation capabilities, and the high-temperature stability and compressive strength of a plugging layer are remarkably improved. The chemical binding force of the plugging agent and the rock is enhanced; the hydrolysable methoxyl reserved in the core layer provides a secondary plugging function, and the plugging validity period is prolonged. The invention relates to a preparation method of a nano blocking agent for drilling fluid, which is used for preparing the nano blocking agent for drilling fluid.

The invention discloses a green phosphorus-free and nitrogen-free corrosion and scale inhibitor, and relates to the technical field of energy-saving and environment-friendly water treatment agents. The corrosion and scale inhibitor is prepared from polyaspartic acid, hydrolytic polymaleic acid, acrylic acid / hydroxypropyl acrylate copolymer, polyepoxysuccinic acid, delta-valerolactam, sodium borate, zinc sulfate heptahydrate and benzotriazole according to a specific proportion. The preparation method comprises the following steps: preparing the modified polyaspartic acid, adding other components, mixing the modified polyaspartic acid and other components, adjusting the pH value, homogenizing, filtering, filling and the like. The corrosion and scale inhibitor has excellent corrosion and scale inhibition performance, the corrosion inhibition efficiency of the corrosion and scale inhibitor reaches up to 88.6%, and the scale inhibition rate ranges from 90.5% to 92.4%. Compared with a contrast agent, the efficient corrosion and scale inhibition performance is provided, meanwhile, the water treatment agent has the advantages of being environmentally friendly, economical and the like, and is a green water treatment agent with great application prospects.

The present disclosure relates to a layered bimetallic hydroxide-based hydrogel bipolar membrane and a method for preparing the same. The method includes: blade-coating a quaternized polyethersulfone solution on a substrate, and carrying out drying to obtain an anion exchange layer; immersing the layer sequentially and cyclically in a sodium alginate solution and a first metal ion mixed solution to obtain a hydrogel anion exchange membrane; immersing the hydrogel membrane sequentially in a second metal ion mixed solution and an alkaline solution; and blade-coating a sulfonated polyethersulfone solution on the obtained membrane, and carrying out drying to obtain the layered bimetallic hydroxide-based hydrogel bipolar membrane. The anion and cation exchange membrane layers on two sides of the bipolar membrane prepared in the present disclosure are closely bound by way of hydrogel cross-linking. The bipolar membrane has the advantages of high water dissociation efficiency, low energy consumption, and good stability.

The invention relates to a method for extracting vanadium from a vanadium slag roasting product and preparing vanadium oxide or vanadyl sulfate, which comprises the following steps of: crushing the vanadium slag roasting product, grinding, carrying out synchronous reduction leaching in a leaching medium, regulating the pH value of a leaching solution to 0-5 by using a pH regulator, and carrying out solid-liquid separation on the leaching medium and the roasting product according to the liquid-solid ratio of (3-20): 1, so as to obtain the vanadium oxide or vanadyl sulfate. And leaching liquid containing positive divalent vanadium oxygen ions is obtained. According to the method, when the vanadium slag roasting product is leached, the reducing agent is added to directly control the valence state of vanadium in the leaching solution, tetravalent vanadium with the stable valence state is obtained, the problem that the vanadium leaching efficiency is low due to the fact that pentavalent vanadium ions are prone to hydrolysis is solved, vanadium oxyhydroxide is prepared in combination with a selective precipitation method, VO2 or V2O5 is prepared through calcination under different atmospheres, and the method is suitable for industrial production. Or in-situ extraction-reverse extraction is carried out in the reduction leachate to prepare vanadyl sulfate. The method is short in process, high in vanadium yield, compact in process linkage, less in three wastes and easy to industrialize.

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to a high-static-rigidity high-damping low-pressure-change polyurethane elastomer and a preparation method thereof. Comprising a polyol component and an isocyanate component, and the polyol component comprises polyol A, a chain extender, a stabilizer, a hydrolysis-resistant agent and a catalyst; the isocyanate component is prepared from isocyanate, polyhydric alcohol B and branched chain unit alcohol; the polyol A comprises amine ether polyol and polytetrahydrofuran ether polyol; the polyhydric alcohol B comprises bio-based hydrolysis-resistant polyhydric alcohol and polytetrahydrofuran ether polyhydric alcohol; the bio-based hydrolysis-resistant polyol is prepared by carrying out a reaction on sebacic acid, 1, 2-propylene glycol and 1, 4-butanediol; the branched-chain unit alcohol is prepared from tetrahydrofuran and isooctanol through a reaction. By introducing the bio-based hydrolysis-resistant polyhydric alcohol and branched chain monohydric alcohol, the damping effect is remarkably enhanced, and on this basis, through formula adjustment and raw material screening, the product toughness is greatly improved, the compression set is reduced, and the performance of the product in heavy haul railway application is effectively optimized.

The invention relates to the technical field of fabrics, and discloses a preparation method of an anti-wrinkle comfortable fabric, which comprises the following steps: by taking alkyl diamine, acrylonitrile, gamma-chloropropyl methyl dimethoxy silane and the like as raw materials, carrying out addition reaction, hydrolysis reaction and quaternization reaction to obtain polycarboxyl disilane gemini quaternary ammonium salt; octamethylcyclotetrasiloxane, polycarboxyl disilane gemini quaternary ammonium salt and the like are used as raw materials, quaternary ammonium salt modified polysiloxane is obtained through base catalysis copolymerization, then the quaternary ammonium salt modified polysiloxane is emulsified and prepared into finishing liquid, pure cotton fabric is soaked in the finishing liquid, and the anti-wrinkle comfortable fabric is obtained through two-dipping and two-rolling finishing. The crease resistance of the fabric is improved by utilizing a large number of amino groups and carboxyl groups contained in the finishing liquid, and the antibacterial property of the fabric is improved by utilizing a quaternary ammonium salt structure contained in the finishing liquid. Experiments prove that the prepared fabric has good crease-resistant comfort performance and antibacterial performance.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to enhance production yield and fruit quality of cucumber by selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and, at early growth stage, applied to the soil around and / or leaf surface of the cucumber plants. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, before administering as taught herein.

The invention relates to the technical field of catalyst carriers, and relates to a modified alpha-alumina carrier, a preparation method thereof, a supported silver catalyst and application. The modified alpha-alumina carrier is an alpha-alumina carrier with a silane coupling structure on the surface, and silane is at least one of silane compounds containing 1-3-Si-O-C-structures and containing vinyl or amino. Preferably, the silane compound is selected from at least one of vinylmethoxysilane, 3-aminopropyltriethoxysilane and methylvinyldimethoxysilane. According to the modified alpha-alumina carrier, the silane solution is adopted to treat the alpha-alumina carrier, silane contains a-Si-O-C-structure, the group can form a relatively stable structure on the surface of the carrier after hydrolysis or dehydration condensation, and influence is generated for a long time in the use process of a silver catalyst, so that the performance of the catalyst is improved.

The invention relates to the technical field of coatings, in particular to a mesoporous thermal insulation coating with an infrared heat shielding function and a preparation method thereof.The preparation method comprises the steps that polyurethane-organic silicon emulsion is selected as a base material of the coating, chain extension is conducted on polyurethane prepolymer through a hydroxyl-terminated ternary flame-retardant chain extender, and high-flame-retardant and self-repairing polyurethane-organic silicon emulsion is prepared; hollow silicon dioxide microspheres are selected as a mesoporous material, and the mesoporous material is prepared by a two-step method of performing hydrolytic condensation on phenyltrimethoxysilane and then calcining to remove impurities. The preparation method comprises the following steps: modifying hollow silicon dioxide microspheres to prepare composite hollow silicon dioxide microspheres as a filler, growing cesium-doped tungsten bronze nanoparticles on the surfaces of the hollow silicon dioxide microspheres in situ by adopting a solvothermal method to obtain pretreated hollow silicon dioxide microspheres, and treating the pretreated hollow silicon dioxide microspheres with an epoxy silane coupling agent to obtain epoxidized hollow silicon dioxide. And then grafting a hydroxyl-terminated ternary flame-retardant chain extender by utilizing an epoxy-hydroxyl reaction.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to enhance the yield and quality of tea leaves. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then apply to the tea trees either by infusing to the soil or by leaf spray at certain growth stages. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, for soil infusing or leaf spraying.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to promote the growth of wheat plants under low light conditions. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then spray to the wheat leaves at tillering stage. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, for for spraying to leaf surface of wheat plants at tillering stage.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to improve the quality and extend the freshness of lettuce plants / leaves. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then infused to the soil in which the lettuces are planted; the solution can also be sprayed to the leaf surface of lettuce plants. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, for infusing to the soil and for spraying to leaf surface of lettuce plants.

The invention relates to the technical field of organic chemical synthesis, in particular to a preparation method of 3, 4 '-diaminodiphenyl ether.The preparation method comprises the steps that S1, under inert gas and in a first solvent, m-dinitrobenzene and p-acetamidophenol are subjected to a heating reaction under the condition of a weak base catalyst, and 3-nitro-4-acetamido diphenyl ether is prepared; s2, in a second solvent, the 3-nitro-4-acetamido diphenyl ether is subjected to a hydrogenation reduction reaction, and 3-amino-4-acetamido diphenyl ether is prepared; and S3, dissolving the 3-amino-4-acetaminodiphenyl ether in an alcohol solvent system, adding an aqueous solution of alkali, controlling the reaction temperature, carrying out a hydrolysis reaction, and after the reaction is finished, carrying out post-treatment to obtain the 3, 4 '-diaminodiphenyl ether. The preparation method provided by the invention has the advantages of easily available raw materials, low price, good selectivity and high product yield, and is more suitable for industrial production by comprehensively considering economical efficiency and safety.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to enhance lettuce plant's growth and production yield. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then infused to the soil in which the lettuces are planted; the solution can also be sprayed to the leaf surface of lettuce plants. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, for applying to the soil around the lettuce plants and for spraying to leaf surface of lettuce plants.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to enhance tomato plant's growth and production yield in hot weather. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then infused to the soil in which the tomato seedlings / plants are planted; the solution can also be sprayed to the leaf surface of tomato plants. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, for applying to the soil around the tomato seedlings / plants and for spraying to leaf surface of tomato plants.

The invention relates to an isoterpinene 4, 8-epoxide synthesis method, which comprises: blending an isoterpinene raw material, a catalyst, a catalyst auxiliary agent and a solvent, stirring to form a mixture solution, carrying out a mixing reaction on the mixture solution and an oxidizing agent in a reactor, purifying, and drying to obtain the isoterpinene 4, 8-epoxide. And 2, 8-epoxide. According to the synthesis method of the isoterpinene 4, 8-epoxide, an adopted reaction system is moderate in oxidability and mild in reaction condition, double bonds at the fourth position can be directionally oxidized, high oxidation selectivity is achieved, and finally the highest selectivity of the isoterpinene 4, 8-epoxide can reach 95% or above; meanwhile, the method overcomes the defect that the existence of water in a catalytic system in the prior art easily causes ring-opening hydrolysis of epoxidation reaction, accelerates the epoxidation reaction process, shortens the reaction time, and increases the yield of the product, and the highest yield can reach 88% or above.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to promote the growth and development of corn crops, by selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and, at seedling stage and / or early growth stage, applied to the soil around or sprayed to the young plants. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, before administering as taught herein.

The invention relates to the technical field of food packaging materials, and discloses a high-barrier recyclable eleven-layer co-extrusion film for food packaging and a preparation process thereof, and the preparation process comprises the following steps: preparing a compound which contains a hindered phenol group and a cinnamate group and has a compatible function; the preparation method comprises the following steps: compounding a compound which contains a hindered phenol group and a cinnamate group and has a compatible function with maleic anhydride grafted polyethylene resin PE-g-MAH to prepare a compatible component; the high-barrier recyclable eleven-layer co-extrusion film for food packaging is prepared by taking PA6, BVOH and PE as raw materials, improving the compatibility of BVOH and PE by utilizing compatible components, carrying out hydrolysis reaction on water-soluble BVOH to realize interlayer separation of PE and PA and adopting an eleven-layer co-extrusion blow molding film forming process. And the sanitary performance meets the national standard requirement, and the product is easy to recycle and conforms to the environment-friendly trend.