409 results about "Terpene" patented technology

The invention discloses a preparation process of a pure plant essential oil disinfectant, and relates to the technical field of disinfectants. The problems that plant essential oil is poor in solubility in a water phase, low in stability and the like are solved. The method specifically comprises the following steps: preparing raw materials; preparing a nano emulsion; preparing a solvent and mixing; constructing a natural stable system to obtain a primary product; filtering and sterilizing; and carrying out sterile filling on the disinfectant finished product. The invention provides a pure plant essential oil disinfectant prepared by dissolving type 1 and 8 melaleuca alternifolia essential oil in water, efficient dispersion is realized through a nano-emulsification and natural stabilization technology so as to form a stable aqueous solution, an amphiphilic structure of soapbark saponin is utilized, aglycone and essential oil terpene form a supramolecular compound, and the stable aqueous solution can be used for sterilizing the melaleuca alternifolia essential oil and the melaleuca alternifolia essential oil and the melaleuca alternifolia essential oil. The technical problems of poor dissolvability and low stability of plant essential oil in a water phase are solved, and the plant essential oil has broad-spectrum antibacterial and antiviral characteristics and can meet the disinfection requirements in multiple fields such as medical treatment, object surface treatment, home furnishing and personal care.

The application belongs to the technical field of genetic engineering, and discloses a kind of saccharomyces cerevisiae for producing rare ginsenoside by seaweed biomass and a construction method and application thereof.The saccharomyces cerevisiae has the following characteristics: overexpression of agarase, neojuncanohydrolase, hydroxymethylglutaryl coenzyme A reductase, isopentenyl diphosphate delta isomerase, dammaradienol synthase, protopanaxadiol synthase, cytochrome P450 reductase, protopanaxatriol synthase and glycosyltransferase.The application combines enzymolysis of seaweed biomass with fermentation of rare ginsenoside, which not only endows wild-type yeast with the ability to degrade seaweed biomass that it originally does not have, but also effectively improves the yield of squalene and downstream terpenes (rare ginsenoside Rh1) by overexpression of tHMG1 and IDI1.The saccharomyces cerevisiae can effectively utilize seaweed biomass to obtain squalene and rare ginsenoside Rh1, and has the characteristics of simplicity, economy and ecological friendliness, can convert cheap biomass into high-value products, and provides a way for the development of marine bioeconomy.

The invention discloses an environment-friendly odorless sealing strip adhesive as well as preparation and application thereof, and the environment-friendly odorless sealing strip adhesive is prepared from the following components in parts by mass: 15 to 20 parts of polyacrylate resin, 10 to 15 parts of dammar resin, 5 to 10 parts of fir resin, 3 to 5 parts of hydrogenated terpene resin, 2 to 5 parts of tributyl citrate and 45 to 65 parts of n-decane. The preparation method comprises the following steps: uniformly mixing natural resin (dammar resin, fir resin and hydrogenated terpene resin), polymeric monomers (n-octyl acrylate, methyl methacrylate and hydroxyethyl acrylate) and an environment-friendly solvent (n-decane), and then polymerizing to obtain the environment-friendly adhesive. The synthetic resin (polyacrylate resin) and the natural resin are sufficiently and mutually dissolved in n-decane to form stable and uniform composite resin glue, so that the problems of health risk and environmental pollution caused by harmful solvents such as xylene in the traditional sealing glue are effectively avoided, and the characteristics of no toxicity, no odor and environmental protection of the product are realized; meanwhile, the stability and the bonding performance of the section sealing glue are improved, the matching performance of the optical transmittance and the refractive index of the section sealing glue is enhanced, and the section sealing glue has quick-drying performance and is suitable for medical pathological sections.

The invention belongs to the technical field of biosynthesis, and particularly relates to a method for regulating and controlling stevioside production through a UDPG synthesis route. According to the invention, a high-efficiency stevioside biosynthesis system is constructed through systematic engineering modification: in the aspect of chassis cell optimization, transcription factors (AtWRKY18, AtWRKY40 and AtMYC2) for regulating and controlling MEP pathway and key genes (dxs and / or dxr) of the MEP pathway are over-expressed, so that supply of terpene precursors is enhanced; and a heterologous MVA pathway (over-expression T7-atoB-mvaS-mvaE-mvK / mvKmut-pmK-mvaD-idi) with a modular design is introduced, so that sufficient supply of the terpenoid precursor is realized. Meanwhile, the intracellular concentration of the UDPG is increased by systematically enhancing a UDPG synthesis pathway (knocking out ugd, glgc, ushA, agp, deoA, tdk, udp, or thrA, and overexpressing galU, pgm, pyrE, pyrH, ugpA, or prs), so that the production capacity of the stevioside is remarkably improved.

The invention belongs to the technical field of biosynthesis, and particularly relates to a method for regulating and controlling stevioside production by improving the utilization rate of a carbon source. According to the invention, a high-efficiency stevioside biosynthesis system is constructed through systematic engineering modification: in the aspect of chassis cell optimization, transcription factors (AtWRKY18, AtWRKY40 and AtMYC2) for regulating and controlling MEP pathway and key genes (dxs and / or dxr) of the MEP pathway are over-expressed, so that supply of terpene precursors is enhanced; and a heterologous MVA pathway (over-expression T7-atoB-mvaS-mvaE-mvK / mvKmut-pmK-mvaD-idi) with a modular design is introduced, so that sufficient supply of the terpenoid precursor is realized. Meanwhile, by knocking out related genes and bypass metabolism genes (mgsA, iclR, menA or adhE) synthesized by organic acid, a glucose transport and utilization system (fnr, fadR, ppc, zwf or pgi is knocked out, and ACS, fbaA, tpiA, glf, galP or ptsG is overexpressed, so that the utilization rate of a carbon source is further improved, and the production capacity of stevioside is remarkably improved.

The invention relates to a lead-free and halogen-free soldering paste and a preparation process thereof, and belongs to the technical field of soldering paste production, through the combination of nano-silver-loaded carbon nanotubes, organically coated solder alloy powder and soldering flux, the surface tension of the lead-free and halogen-free soldering paste can be reduced by carbon nanotube surface carboxyl in the nano-silver-loaded carbon nanotubes, so that the lead-free and halogen-free soldering paste is obtained. Nano-silver and tin form an Ag3Sn strengthening phase which synergistically promotes wetting and spreading of the solder on a substrate, meanwhile, the carbon nanotubes loaded with the nano-silver are uniformly dispersed in the soldering paste to play a dispersion strengthening role, and the brittleness caused by bismuth segregation is effectively inhibited in cooperation with the grain refinement effect of copper and indium in the solder alloy powder; and the organic coating layer hydrogenated rosin-terpene resin and the soldering flux alcohol ether solvent form a slight dissolution-fusion effect, so that the welding flux alloy powder is prevented from being oxidized, an organic acid active agent can be released to remove a substrate oxidation film, the metallurgical bonding quality of a welding interface is further guaranteed, and the defects of pseudo soldering, cavities and the like are reduced.

This easily dismantlable adhesive sheet (100) comprises an adhesive layer (10) containing a moisture-cured product of a silyl group-containing resin and a terpene phenolic tackifying resin, wherein the silyl group-containing resin has a polyoxyalkylene structure in a main chain, has, in a portion of the main chain or a side chain, both bonds among a urethane bond and a urea bond or one bond among the urethane bond and the urea bond, and has hydrolyzable silyl groups represented by formula (1) at both ends of the main chain. (In formula (1), X1 and X2 are each independently a hydroxy group or an alkoxy group, R is a C1-C20 alkyl group, and * is a bonding position.)

The invention discloses a composition for enhancing Chinese chestnut fragrance of a tea beverage as well as a preparation method and application of the composition, and belongs to the technical field of food additives. The composition is prepared from the following raw materials in parts by weight: 0.1 to 0.9 part of furanone, 0.01 to 0.2 part of linalool, 0.001 to 0.5 part of 2, 5-dimethylpyrazine, 0.02 to 0.1 part of geraniol, 0.03 to 0.05 part of beta-ionone and 0.01 to 0.25 part of geranyl acetone. According to the invention, through a unique ratio design, the scorched nut smell of pyrazine compounds, the rich caramel sweet taste of furanone, the stir-fried smoke and fire smell of 2-acetylthiazole and the freshness of geraniol and other terpene alcohols are ingeniously fused, and the complex level of Chinese chestnut fragrance is accurately reproduced. According to the present invention, the edible-grade propylene glycol is adopted as the solvent, such that the solubility, the dispersibility and the stability of the aroma composition in the tea beverage can be effectively improved, the persistence and the uniformity of the aroma release can be significantly improved, the shelf life of the tea beverage product can be easily prolonged, and the market competitiveness of the product can be enhanced.

This invention provides a breathable plaster matrix for application and its preparation method, belonging to the field of polymeric dressings and plasters. The plaster matrix raw materials include terpene-modified rosin beeswax, hydrogenated rosin glyceryl ester, camellia oil, castor oil, stearic acid hydrophobically modified microcrystalline cellulose, zinc oxide, glycerin, coated citric acid, sodium bicarbonate, polyethylene glycol, camphor, and menthol. The terpene-modified rosin beeswax is prepared by reacting rosin and α-pinene in the presence of di-tert-butylperoxyisopropylbenzene, followed by the addition of white beeswax and maleic anhydride, and then the addition of trimethylolpropane. The stearic acid hydrophobically modified microcrystalline cellulose is microcrystalline cellulose coated with stearic acid. The coated citric acid is citric acid coated with hydrogenated castor oil. This invention's plaster matrix significantly improves skin breathability, application comfort, and biocompatibility while ensuring sufficient adhesion, formability, and drug loading capacity.

A liquid composition containing, as a sucrose fatty acid ester in liquid form, a sucrose fatty acid ester in which the constituent fatty acid has 16 or more carbon atoms, the liquid composition comprising terpenes and a monohydric alcohol and / or a dihydric alcohol, wherein the content of the terpenes is 0.08-1.2 parts by weight relative to 1 part by weight of the sucrose fatty acid ester, the content of the monohydric alcohol and / or the dihydric alcohol is 0.50-5.0 parts by weight relative to 1 part by weight of the sucrose fatty acid ester, and the content of the sucrose fatty acid ester is 15-80% by weight of the total amount of the liquid composition.

The invention relates to the technical field of sealing glue for shoes, and discloses environment-friendly traceless sealing glue for shoes and a preparation method of the environment-friendly traceless sealing glue. The sealing compound is prepared from 40 to 50 parts of polyester polyol, 9 to 15 parts of HDI (hexamethylene diisocyanate) tripolymer, 0.1 part of environment-friendly catalyst, 2 to 5 parts of silane coupling agent, 1 to 1.5 parts of organic silicon flatting agent, 15 to 20 parts of ethyl acetate / acetone mixed solution and 8 to 10 parts of hydrogenated rosin glyceride and terpene resin. The sealing compound disclosed by the invention has the characteristics of traceless invisibility, high-strength adhesion, good leveling performance, wide applicability and environmental protection.

The invention discloses a method for retaining flavor of plum-leaf crab ice wine. The method comprises the following steps: 1, selecting red-pulp malus spectabilis fruits and eight-edge malus spectabilis fruits, washing, and draining with a vibrating screen until the surface moisture is less than or equal to 5%; 2, denucleating, taking pulp, pulping and sieving to obtain plum-leaf crab normal juice; 3, beta-glucosidase is added; 4, adding modified pectin microspheres, and carrying out three-stage cooling to obtain frozen plum-leaf crab normal juice; 5, slowly unfreezing, inoculating low-temperature-resistant saccharomyces cerevisiae liquid, and carrying out low-temperature segmented fermentation; 6, ageing; and 7, adding potassium tartrate, continuing for 2-3 months, filtering, and clarifying until the turbidity is less than or equal to 2NTU. The modified pectin microspheres with the adsorption-slow release function are added, terpene and ester flavor precursors in the plum-leaf crab are adsorbed in the fermentation period, the volatilization and hydrolysis rate of flavor substances in the fermentation process is reduced, especially the retention rate of plum-leaf crab characteristic fruity substances such as ethyl caprylate and ethyl caprate can be increased, and after being degraded, the modified pectin microspheres can be used for degrading the plum-leaf crab characteristic fruity substances. And the components are released back into the wine body.

The application provides an oily environment-friendly high-molecular anticorrosive waterproof coating and a preparation method thereof, and belongs to the technical field of coating compositions. The oily environment-friendly high-molecular anticorrosive waterproof coating is prepared from the following raw materials in parts by weight: SEPS 5-20 parts, polyisobutylene 1-15 parts, terpene resin 3-15 parts, poly-alpha-methylstyrene resin 1-12 parts, A81 resin 2-10 parts, inorganic filler 7-50 parts, defoaming agent 0.1-2 parts, antioxidant 0.1-2 parts, ultraviolet absorber 0.1-2 parts, light resistance agent 0.1-1 part, environment-friendly solvent 25-70 parts, and perfume 0-1 part. The oily environment-friendly high-molecular anticorrosive waterproof coating is waterproof, corrosion-resistant, environment-friendly and convenient to construct, and is suitable for application in surface protection of color steel tile and the like.

The invention relates to the technical field of wine brewing, and discloses a preparation method of a viburnum macrocephalum pulp sweet white wine, which comprises the following steps: accurately harvesting viburnum macrocephalum pulp grapes, simultaneously removing diseased fruits and green fruits, treating the picked viburnum macrocephalum pulp grapes by adopting an air bag squeezing process, and then carrying out low-temperature clarification treatment to obtain grape juice. According to the preparation method of the viburnum macrocephalum pulp sweet white wine, through low-temperature squeezing and special yeast low-temperature fermentation processes, the retention rate of core terpene aroma substances of the viburnum macrocephalum pulp is larger than or equal to 90%, the finished product is rich in aroma, the attenuation rate of the aroma within the shelf life of 24 months is smaller than or equal to 15%, and the preparation method is far superior to a traditional process; the problem of low natural acidity of the Jones-dried scallop pulp is solved, residual sugar and acidity form golden balance, and the Jones-dried scallop pulp is full in sweet taste but not greasy; the palatability score is improved by 50% or above compared with that of a traditional process; through oak barrel aging process innovation, the finished product can present various flavor structures, the limitation of single flavor of a traditional product is broken through, and the high-end attribute is remarkable.

The invention discloses a method for improving the processing quality of tobacco leaves by using a facultative anaerobic bacterium compound preparation, which comprises the following steps: preparing seed solutions of bacillus altitudinis ZY02-1, bacillus subtilis SMXP-58 and klebsiella variicola HNYJ-3, preparing a tobacco extracting solution, compounding the seed solutions according to the ratio of 2: 1: 2, centrifuging, resuspending and culturing by using the tobacco extracting solution to obtain a compound bacterial agent, and preparing the compound bacterial agent by using the facultative anaerobic bacterium compound preparation. And finally, spraying the complex microbial inoculant according to the inoculum size of 2-5% until the primarily-cured tobacco leaves are dampened until the moisture content is 14-15%, sealing, stacking and fermenting at 20-30 DEG C for 3-5 days, and then re-drying. By means of the method, decomposition of polyphenol and terpene aroma precursors of the tobacco leaves can be accelerated, the content of aroma substances such as megastigmatrienone is remarkably increased, aroma components such as oxidized isophorone are added, the aroma quality and the aroma amount of cigarettes are improved, offensive odor is reduced, and the aftertaste and smoking comfort are improved.

The invention relates to a recombinant genetically engineered bacterium for synthesizing terpenoids. The recombinant genetically engineered bacterium is saccharomyces cerevisiae in which a gal80 gene, an lpp1 gene and a dpp1 gene are knocked out and a heterologous MVA pathway gene and an AuoblA gene are integrated. According to the invention, a ophiobollin synthesis route is introduced into the saccharomyces cerevisiae in a heterologous manner for the first time, so that de novo synthesis of a ophiobollin skeleton compound, namely the ophiobollin F and an oxidation product of the ophiobollin F is realized; the synthesis of the ophiobolin F of 5.1 g / L is realized, which is also the highest sesterterpene heterologous synthesis yield reported at present; according to the invention, the ophiobolin 5-OH-21-CHO-opF with a new structure, which has excellent anti-cancer activity, is obtained through identification; the engineering strain of high-yield ophiobolin U is constructed, and the shake flask yield reaches 128.9 mg / L.

The invention provides a detection method for improving detection of terpene substances in yeast for making hard liquor, and relates to the field of flavor analysis of fermented food. The method comprises the following steps: 1) performing crushing pretreatment on a target yeast block to obtain yeast powder; 2) taking absolute ethyl alcohol as a solvent, performing water bath rotary evaporation on the yeast powder at 40-60 DEG C, filtering after rotary evaporation, retaining solid-phase yeast powder, and performing vacuum drying to obtain a dried yeast powder sample; (3) collecting a gas-phase sample with stable components volatilized from the yeast powder sample under the conditions of water bath heating and nitrogen purging; (4) pre-concentrating the gas-phase sample by adopting a multi-stage cold trap principle, wherein the enrichment multiple of the gas-phase sample is not less than 1000 in the pre-concentration; 5) collecting the pre-concentrated gas phase sample, inputting the pre-concentrated gas phase sample into a gas chromatograph-mass spectrometer for gas chromatography-mass spectrometry, and determining the terpene substances in the yeast for making hard liquor through standard gas matching. Compared with the prior art, the method has the advantages that 12 terpene substances can be simply and efficiently detected at a time, and the detection rate of the terpene substances is remarkably increased.

This invention discloses an aramid fiber reinforced solid conveyor belt and its preparation method, relating to the field of conveyor belt technology. Specifically, it includes the following steps: S1: Aramid fiber cloth passes through a continuous plasma surface treatment machine at a uniform speed, and its upper and lower surfaces are subjected to plasma activation treatment to obtain modified aramid fiber cloth; S2: (1) Natural rubber, styrene-butadiene rubber, chloroprene rubber, ethylene propylene diene monomer (EPDM) rubber, terpene phenolic resin, modifier, modified filler, bis-[3-(triethoxysilyl)propyl]tetrasulfide, zinc oxide, antioxidant, flame retardant, sodium stearate, vulcanizing agent, and vulcanization accelerator are added to a mixing machine and mixed to obtain a compound; (2) The compound is transferred to a calender and calendered to obtain a cover layer; S3: The cover layer, modified aramid fiber cloth, and cover layer are stacked in the order of top to bottom, and then rolled, bonded, and vulcanized to obtain an aramid fiber reinforced solid conveyor belt.

The application belongs to the field of microbial metabolic engineering, and discloses a Saccharomyces cerevisiae engineering strain with enhanced isopentenol tolerance and conversion capacity, and a construction method and application thereof. The Saccharomyces cerevisiae engineering strain is obtained by modifying an isopentenol utilization pathway-dependent Saccharomyces cerevisiae strain, and the energy metabolism of the Saccharomyces cerevisiae strain is enhanced to synthesize a large amount of ATP for the isopentenol utilization pathway; and the antioxidant stress resistance of the Saccharomyces cerevisiae strain is enhanced to relieve the oxidative damage caused by the isopentenol substrate. The Saccharomyces cerevisiae engineering strain is the strain with the highest efficiency in converting isopentenol into terpenes.

The invention relates to a fragrance composition for relieving mood of children as well as a preparation method and application of the fragrance composition. The fragrance composition is prepared from the following components in percentage by weight: 40 to 60 percent of methyl dihydrojasmonate, 30 to 50 percent of brazyl acid glycol cyclic ester, 1 to 10 percent of terpinyl dihydroacetate, 1 to 10 percent of tetrahydrolinalool and 1 to 5 percent of methyl cedryl ketone. Compared with the prior art, the emotional soothing fragrance has universality (can be used for cosmetics of various dosage forms), the emotional soothing effect is achieved by reducing the heart rate, breath and the like used by children, meanwhile, the brain wave alpha / beta power is improved, and the soothing and nerve soothing effect is achieved.

The invention relates to a composition comprising sulfur and a 2n d active ingredient (ai), wherein the 2nd ai is a herbicide selected from a classical herbicide, a fatty acid, an oil or a terpenic compound, in a ratio 5000:1 – 1:2000 (w / w; sulfur: 2nd ai). The invention further relates to a method for controlling weed growth, comprising providing sulfur and said 2nd active ingredient (ai). The invention further relates to a method for accelerating the desiccation, death, and / or defoliation of leaf. The invention further relates to a method for controlling, preventing and / or eliminating the presence of a sucker or runner. The invention further provides a use of sulfur for enhancing the activity of a 2nd ai against a weed.

The invention is related to a process for synthesizing a sustainable aviation fuel composition. The process comprises providing a reaction mixture comprising a first compound that is at least one of mevalonolactone, mevalonic acid, mevalonate salt, dehydromevalonic acid, dehydromevalonate salt, dehydromevalonolactone or combinations thereof. The process then involves converting the first compound in the reaction mixture to provide a first intermediate comprising isoprene. Then, the isoprene in the first intermediate is reacted in the presence of a first heat transfer agent to provide a second intermediate comprising terpenes. Finally, the second intermediate is allowed to react in the presence of a second heat transfer agent, or alternatively in neat conditions, and optionally in presence of a catalyst to provide the sustainable fuel composition. The sustainable aviation fuel composition made available from the process of the invention is found to comprise monocyclic aromatic hydrocarbons (MAHs) at useful concentration ranges (along with cycloalkanes) while they are substantially devoid of Polycyclic aromatic hydrocarbons (PAHs).

The invention provides a preparation method and application of high-palatability carrot dietary fibers. The method comprises the following steps: (1) washing and dicing carrots; (2) cellulase and saccharifying enzyme enzymolysis; (3) constructing a two-phase system, adding a compound enzyme and pectinase, and carrying out gradient enzymolysis; (4) carrying out enzyme deactivation and centrifugation to obtain a water phase; (5) performing gradient centrifugation to obtain mixed fibers; (6) precipitating, and collecting precipitated fibers; (7) adding carrot source nano cellulose to obtain a composite fiber with a core-shell structure; and (8) drying, crushing and sieving. According to the preparation method disclosed by the invention, the core problems of rough taste (large particle size), astringent taste (residual acetyl groups and terpene substances), weak function and low purity in the traditional carrot dietary fiber preparation process are solved through a water-alcohol two-phase gradient composite enzymolysis and nano cellulose composite purification process; and finally, the high-palatability carrot dietary fiber which is fine, smooth, free of rough feeling, natural, fresh and sweet, high in purity and strong in function is prepared.

The present invention provides a novel room-temperature extraction system and method for cannabis and hemp, utilizing custom membrane filtration to efficiently isolate cannabinoids, terpenes, and other bioactive compounds while reducing energy consumption. This multi-stage system begins with a custom milling machine that preprocesses biomass by separating non-target components, such as cellulose-rich stalks, to improve extraction efficiency. The core extraction process employs a series of custom membranes designed to selectively filter cannabinoids and terpenes, minimizing impurities without the need for traditional sub-zero cooling. Each membrane stage incorporates solvent recovery to recycle ethanol, reducing waste and operational costs. In the final stage, a custom concentrator removes residual ethanol, decarboxylates THCa to THC, and crystallizes sugars to prevent downstream clogging. This room-temperature extraction system significantly enhances yield, purity, and sustainability, making it a scalable and cost-effective solution for cannabis and hemp processing industries, as well as applicable for pharmaceutical and nutraceutical uses.

The present invention pertains to novel modified terpene synthases and their use for a preparation method for pseudopterosin intermediates and / or pseudopterosins. The method is based on the use of a modified terpene synthase comprising at least one modified amino acid residue, which enables a terpene synthase-catalyzed increased production of pseudopterosin intermediates and / or pseudopterosins from Geranylgeranyl pyrophosphate as starting material. The new modified terpene synthases of this invention allow the production of pseudopterosin intermediates, such as Isoelisabethatriene A, Isoelisabethatriene B, Erogorgiaene, or Seco-Pseudopterosin and / or the production of pseudopterosins, such as Pseudopterosin A, in a cost-efficient, economical, and sustainable manner. Also provided are nucleic acids, encoding for the modified terpene synthases of this invention, as well as expression vectors capable of expressing such nucleic acids and host cells comprising the same.

The invention relates to the technical field of pressure-sensitive adhesives, in particular to a high-adhesion high-temperature-resistant copper foil single-sided adhesive and a preparation method thereof. Comprising a copper foil and a pressure-sensitive adhesive which are laminated, the thickness of the copper foil is 12-30 [mu] m, the thickness of the pressure-sensitive adhesive is 10-30 [mu] m, the normal-temperature storage modulus is 200000-270000 Pa, the pressure-sensitive adhesive comprises an acrylate polymer and a terpene polymer, the acid value of the acrylate polymer is 16-22 mgKOH / g when the solid content is 21%, the normal-temperature storage modulus is 150000-180000 Pa, the acid value of the terpene polymer is 60-120 mgKOH / g, the softening point is 120-140 DEG C, and the temperature of the terpene polymer is 20-30 DEG C. The terpene polymer is obtained by free radical polymerization of a terpene monomer, a hard segment monomer and an acidic monomer under the action of an initiator. The copper foil single-sided adhesive prepared by the preparation method disclosed by the invention is thin in thickness and low in cost, and has excellent adhesion and warping resistance to foam.

The invention relates to a dictyophora rubrovolvata fresh-keeping method and fresh-keeping powder used by the same. The fresh-keeping powder is prepared from the following raw materials in percentage by mass: 0.1-1% of ethanol extract of bacilli of dictyophora rubrovolvata, 5-30% of bacilli polysaccharide, 10-50% of chitosan and 20-85% of corn starch (2-8% of calcium chloride is added). The powder provided by the invention contains dictyophora rubrovolvata mycosterol, terpene and polysaccharide substances, contains low-acetyl-degree chitosan with strong antibacterial ability and certain water solubility, and absorbs moisture of the dictyophora rubrovolvata body after being contacted with the newly picked dictyophora rubrovolvata, acidic mycosterol with negative charges and alkaline low-acetyl-degree chitosan with positive charges are subjected to electrostatic adsorption reaction, so that the moisture of the dictyophora rubrovolvata can be absorbed, and the moisture of the dictyophora rubrovolvata can be absorbed; the components are mutually attracted to form a local film, so that the moisture of the mushroom body can be locked, the mass loss and hardness reduction can be relieved, the freshness can be kept through oxidation resistance and bacteria resistance, the peroxidation degree of film lipid can be relieved, the cell integrity can be maintained, and the retention rate of nutrient substances such as reducing sugar and soluble protein can be effectively increased.

The application discloses a itaconate / conjugated diene / terpene multivariate copolymer type bio-based rubber and a vulcanized rubber and a preparation method thereof, relates to the technical field of rubber synthesis, and the number average molecular weight of the bio-based rubber is 50-100 million, preferably 100-800 million; the molecular weight distribution is 1.5-10.0, preferably 2.0-5.0. The itaconate monomer adopted in the application is derived from a bulk bio-based chemical, itaconic acid, the terpene monomer adopted is also derived from a biomass resource, and the application has a wide application in industrial production; the itaconate / conjugated diene / terpene multivariate copolymer is prepared by using an oxidation-reduction emulsion polymerization technology, is environment-friendly and has low energy consumption, is simple in process and is suitable for industrialized production. The itaconate / conjugated diene / terpene multivariate copolymer type bio-based rubber has high bio-based content and excellent mechanical properties and comprehensive performance in tire application.

The invention discloses a regulator for improving grape fruit fragrance and a preparation method thereof, and belongs to the technical field of grape cultivation, each liter of regulator comprises 50 mg-120 mg of chitosan oligosaccharide, 20 mg-50 mg of sodium selenite, 10 mg-20 mg of jasmonic acid methyl ester, 100 mg-250 mg of green tea polyphenol, 10 mg-20 mg of trehalose, 1 mL-5 mL of thymol nanoemulsion, 10 mg-20 mg of beta-cyclodextrin and 0.8 g-1. 0 g of ethyl alcohol, and water is used as a solvent. The content of strawberry ketone, ester and norisoprene compounds in the fruits to which the regulator is applied is obviously increased, nerol and beta-ionone are detected, and the variety of terpene aroma substances is enriched; after the fruit is stored in a high-temperature and high-humidity environment for 3 days, the aroma component change of the fruit to which the regulator is applied is relatively insignificant, and the aroma of the fruit is more stable than that of a reference substance and a blank reference substance.

The invention provides a terpene nano composite material capable of naturally releasing negative oxygen ions and a preparation method thereof, and relates to the field of negative oxygen ions, the composite material comprises the following raw materials by weight: 15-35 parts of a terpene concentrate, 65-85 parts of a composite matrix, and 1-3 parts of a synergist; the terpene concentrate is prepared from the following raw materials in parts by weight through stepped extraction: 20-40 parts of pine needles, 10-20 parts of cypress leaves, 5-15 parts of wormwood, 2-8 parts of cloves, 3-10 parts of citrus peels, 1-5 parts of sweet-scented osmanthus, 2-6 parts of moss and 1-4 parts of selenium-enriched tea leaves. The composite material has the advantages of high efficiency, long acting, multiple functions, industrialization and the like.