127 results about "Hexanol" patented technology

A gasoline modifier, a preparation method therefor and a use thereof, and a clean and environmentally friendly gasoline containing same. By volume, the gasoline modifier comprises 10-30 parts of No. 3 or No. 5 white oil, 5-50 parts of a gasoline detergent synergist and 40-85 parts of isooctyl alcohol; the gasoline detergent synergist comprises a stock liquid and a diluent liquid; the stock liquid is a liquid substance formed by mixing 2-ethylhexyl phosphate and etidronic acid in a weight ratio of 1.8-3:1 and heating to perform an esterification reaction; and / or the stock liquid comprises 2-ethylhexanol, phosphite ester, 2-ethylhexyl acetate, polyisobutylene succinic anhydride and ethylhexyl phosphate; the diluent liquid is formed by mixing formaldehyde having a content greater than 99% with oligomeric water clusters in a weight ratio of 1:4-3:7; and the weight percentage of the stock solution in the gasoline detergent synergist is 0.8%-1.3% white oil. The gasoline modifier is a pure petroleum product. When added to gasoline, it can change the physical properties of the gasoline, and achieve the effects of increasing efficiency, saving fuel, removing carbon and reducing emissions.

The invention discloses a low-rank coal composite flotation reagent and a preparation method and application thereof, and belongs to the technical field of coal flotation of mineral processing. The agent specifically comprises a composite collecting agent and a composite foaming agent, and the composite collecting agent comprises kerosene, n-dodecane, oleic acid, dimer acid, sodium stearate, terpilenol, diethyl phthalate, alkylphenol ethoxylates, span-80, trioctyl phosphate and 2-ethylhexanol. The composite foaming agent is prepared from the following components: terpilenol, terpenic oil, sec-octyl alcohol and sodium alpha-olefin sulfonate. Compared with a traditional single flotation reagent combination, the composite flotation reagent has a remarkable effect in fine coal flotation, and particularly when coal with the particle size smaller than 0.5 mm is treated, the flotation efficiency, the clean coal yield and the combustible body recovery rate can be effectively improved. More importantly, the medicament is stable at normal temperature, the layering phenomenon is avoided, the long-term effectiveness is ensured, and the medicament has extremely high industrial application potential.

The invention relates to the technical field of fish meat source identification, in particular to a method for identifying different sources of fish meat by combining an electronic tongue with HS-SPME-GC / MS. The method comprises the following steps: obtaining a fish meat sample; performing taste detection on the fish meat sample by adopting an electronic tongue to obtain a taste detection result; after the fish meat sample is extracted, volatile odor substance detection is conducted through chromatography and mass spectrometry, volatile odor substances comprise one or more of dimethyl phthalate, nonanal, n-hexyl alcohol, naphthalene, octanol, 1-octylene-3-alcohol and alpha-platylene, and a volatile odor substance detection result is obtained; and identifying the fish meat source in combination with the taste detection result and the volatile odor substance detection result. According to the method, an electronic tongue technology and a headspace solid phase microextraction-gas chromatography-mass spectrometry technology are combined for use, and the taste and the smell are detected at the same time so as to distinguish fish meat from different sources, so that a more reliable quality evaluation system can be established, accurate traceability and grading are supported, and different user requirements are met.

The invention discloses application of bacillus albordowii in cultivation for improving the flavor of fragrant rice, and relates to the field of fragrant rice cultivation and planting. According to the application, it is found for the first time that bacillus albordowii has the effect of improving flavor substances of fragrant rice, and when fragrant rice seedlings grow to the three-leaf and one-core stage, the roots of the seedlings are soaked with bacillus albordowii liquid; after the seedlings are transplanted to a field, the bacillus albopastoris bacterial liquid is sprayed to the soil at the roots of the seedlings, 24 main aroma components in the fragrant rice can be increased by 5.56%-12036.00%, the content of 2-ethyl-1-hexanol with rose fragrance is increased by 120 times or above, the content of 2-butyl-1-octanol with flower fragrance is increased by 235.71%, the content of 6, 10-dimethyl-(E)-5, 6-dimethyl-2, 6, 6-tetramethyl-1, 3-pentanedione with fruit fragrance is increased by 235.71%, and the content of 6, 10-dimethyl-(E)-5, 6-tetramethyl-1, 3-pentanedione with fruit fragrance is increased by 235.71%. The content of 2, 9-undecylene-2-ketone is increased by 132.50%, the content of limonene, the content of hexanal, the content of 2-heptanone, the content of 2-tridecanone and the content of 2-pentadecanone are increased by 50% or above, and the content of 2-acetyl-1-pyrroline (2-AP) is increased by 30% or above; the application method is more convenient to operate, and the overall flavor of the rice is improved more remarkably.

The invention discloses a lactobacillus brevis SMF L6 strain for improving the characteristic flavor of fermented fish and application thereof, and belongs to the technical field of aquatic product processing. According to the method disclosed by the invention, low-temperature fermentation is carried out by utilizing a sake lactobacillus wide cloth SMF L6 direct vat set fermentation inoculant to regulate and control the flavor; the method can effectively promote the production of flavor substances such as n-hexyl alcohol, eudesmol, 2-ethylhexyl alcohol, 4-platycladi alcohol, linalool, 4-terpene alcohol, alpha-terpilenol, piperonone, beta-myrcene, alpha-terpinene, D-limonene, beta-phellandrene, gamma-terpinene and the like in the fermented fish. The content of pungent smell and fishy smell substances such as acetic acid, p-xylene, o-xylene, trimethylamine, methyl mercaptan and carbon disulfide is reduced.

The invention discloses a method for synthesizing dialkyl terephthalate through waste PET plastic alcoholysis based on a VTa-coated NC / C catalyst, the conversion rate of PET plastic is 100%, the yield of dimethyl terephthalate and ethylene glycol is as high as 99%, no obvious inactivation phenomenon exists after the catalyst is used for 10 times, and the method is suitable for industrial production. The catalytic system is also effective to n-butyl alcohol, 2-ethylhexanol, isononyl alcohol, isodecyl alcohol and ethylene glycol, a series of plastic additives and ethylene glycol can be obtained, and the product yield is 89% or above.

The invention discloses an anti-tumor pharmaceutical composition based on NBDHEX and application of the anti-tumor pharmaceutical composition in treatment of immunosuppressive malignant tumors. The pharmaceutical composition comprises NBDHEX (6-(7-nitro-2, 1, 3-benzoxadiazol-4-ylthio) hexanol) and a PD-1 (programmed death-1) inhibitor, and is characterized in that the NBDHEX (6-(7-nitro-2, 1, 3-benzoxadiazol-4-ylthio) hexanol) and the PD-1 inhibitor are used as raw materials. The NBDHEX can induce tumor cells to generate immunogenic death and promote tumor antigen release, DAMPs signal activation and dendritic cell maturation, so that an immunosuppressive tumor microenvironment is remodeled, and CD8 + T cell infiltration and effector functions are enhanced. The pharmaceutical composition can significantly improve the anti-tumor immune response intensity and the treatment response rate. Animal experiments and cell experiments verify the synergistic anti-tumor effect of the composition in a lymphoma model. The immunosuppressive malignant tumors are suitable for treatment of various immunosuppressive malignant tumors including lymphoma, and are especially suitable for patients with poor single-drug reaction or drug resistance to immune checkpoint inhibitors, and a new way is provided for clinical treatment of tumors.

The present application relates to the field of magnesium-aluminum composite oxide preparation, and discloses a magnesium-aluminum composite oxide and a preparation method thereof.The method comprises the following steps: (1) under anhydrous conditions, performing a first reaction on aluminum and a first aliphatic alcohol to obtain an alkoxide aluminum-containing material; (2) under the action of a catalyst, performing a second reaction on the alkoxide aluminum-containing material obtained in step (1), magnesium and a second aliphatic alcohol under anhydrous conditions; (3) performing hydrolysis on the reaction product of step (2) to obtain a magnesium-aluminum bimetallic alkoxide, and then performing optional drying and calcination to obtain a magnesium-aluminum composite oxide; wherein the first aliphatic alcohol and the second aliphatic alcohol each independently comprise n-pentanol and optionally n-hexanol. The preparation method of the magnesium-aluminum composite oxide provided by the present application can obtain a high-purity magnesium-aluminum composite oxide without subsequent purification treatment, and has the advantages of short initiation time and short reaction time.

This invention provides a phosphorus-free, multifunctional, environmentally friendly scouring agent, its preparation method, and its application, belonging to the field of textile printing and dyeing technology. The surfactants used in this invention (including 2-ethylhexanol alkyl glycoside, 2-propylheptanol alkyl glycoside, 2-propylheptanol xyloside, and isomeric tridecyl alcohol ether carboxylic acid) are all nonionic surfactants. The resulting phosphorus-free, multifunctional, environmentally friendly scouring agent is easily soluble in water, acid-resistant, resistant to high-concentration strong alkalis, hard water-resistant, low-foaming, and has strong penetrating power. It is widely applicable to cotton and its blended textile processes, achieving excellent whiteness and wicking effect in conventional annealing / scouring / bleaching processes. It contains no alkylphenol polyoxyethylene ethers or organophosphates, causing no environmental pollution and simplifying and making textile pretreatment processes more environmentally friendly.

This invention belongs to the field of biosensing and detection technology, specifically disclosing a Tau protein electrochemiluminescent aptamer sensor, its preparation method, and its application. The sensor uses a CsPbBr₃@PVP / Au composite material as the electrochemiluminescent substrate. A Tau protein-specific aptamer is immobilized on the substrate surface via Au-S bonds, and non-specific adsorption sites are blocked with 6-mercapto-1-hexanol. The CsPbBr₃@PVP / Au composite material is prepared by encapsulating CsPbBr₃ with PVP and then combining it with Au NPs. This invention utilizes the coordination passivation effect of PVP and CsPbBr₃ to significantly improve the aqueous stability and electrochemiluminescence efficiency of perovskite nanocrystals. Combined with the anchoring effect of AuNPs and the specific recognition effect of aptamers, it achieves ultrasensitive detection of Tau protein with a detection limit as low as 0.80 fg / mL. Furthermore, it exhibits excellent selectivity, stability, and detection accuracy in complex biological samples such as cerebrospinal fluid, providing a novel and efficient detection platform for the early diagnosis of Alzheimer's disease and showing promising clinical application prospects.

The invention discloses a Priesteria gigantea GD0038 and an application thereof in improving the flavor of weed crab sauce. The strain is deposited in the China Center for Type Culture Collection with a deposit number of CCTCC NO: M 20242548 and a deposit date of November 13, 2024. The strain is applied to the preparation of weed crab sauce, can significantly improve the flavor of the weed crab sauce, increase the content of volatile substances in the fermented weed crab sauce, and increase the content of characteristic flavor substances such as 1-penten-3-ol, 1-nonanol, isovaleraldehyde, n-hexanol, n-octanol, 3-n-decanol, 2-heptanone, and other alcohols, pyrazines, and ketones, while reducing the content of unpleasant flavor substances such as butylamine, trimethylamine, and n-hexanal. The invention has very good application prospects.

To provide a resin composition which has improved impact resistance at low temperature.SOLUTION: A resin composition contains a 3-hydroxyalkanoic acid-based polymer represented by formula (I), and a polyester-based polymer, wherein the polyester-based polymer is composed of a monomer unit composed of only a polyhydric alcohol component and a dicarboxylic acid component, at least a part of a terminal of the polyester-based polymer is sealed with a residue of monoalcohol and / or a residue of a monocarboxylic acid, polyhydric alcohol of the polyhydric alcohol component is MPD(3-methyl-1,5-pendandiol) and / or TMP(trimethylol propane), a dicarboxylic acid of the dicarboxylic acid component is an adipic acid or a sebacic acid, the monoalcohol is 2-ethylhexanol, and the monocarboxylic acid is an acetic acid. In the formula (I), a ratio (k / p) is 70 / 30 to 99 / 1.SELECTED DRAWING: None

The invention provides a DHHB purification method which comprises the following steps: transferring a DHHB crude product into a washing kettle, adding water into an n-hexanol solution containing DHHB, stirring, standing for phase splitting, discarding a lower phase containing water-based colored impurities, and retaining an organic phase containing DHHB; transferring the DHHB organic phase after water washing to an n-hexanol evaporator, and evaporating out n-hexanol; 4-time crystallization: adding ethanol to dissolve the DHHB crude product after the n-hexanol is removed or the solid product obtained by the previous crystallization, cooling, stirring and crystallizing, filtering, washing the solid with cold ethanol, and reusing the filtrate obtained by the next crystallization in the previous crystallization step; transferring a solid obtained after fourth crystallization and filtration to a vacuum dryer, and drying to obtain a high-purity DHHB product; and feeding the filtrate subjected to primary crystallization and filtration into an ethanol evaporator, and distilling to recover ethanol. The invention provides a DHHB green purification process which is efficient, energy-saving, low in cost and high in yield of 95% or above.

The invention provides a nanofiber membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing a first composition containing quantum dots and a polar solvent, wherein the surfaces of the quantum dots have 6-sulfydryl-1-hexanol ligands; s2, preparing a clarified second composition containing a polyvinylidene fluoride-hexafluoropropylene copolymer and a polar solvent; s3, uniformly mixing the first composition and the second composition to obtain a spinning solution; s4, preparing a nanofiber membrane by utilizing an electrostatic spinning process and the spinning solution; wherein the S1 is carried out before or after or synchronously with the S2. The membrane has the characteristics of high fluorescence performance of the quantum dots and stability of the polyvinylidene fluoride-hexafluoropropylene copolymer, and the fluorescence intensity and the storage stability of the ligand-modified nanofiber membrane are greatly improved.

The invention belongs to the technical field of environmental engineering and chemical separation, and particularly relates to a deep-eutectic solvent composition for efficiently extracting phenolic compounds and a preparation method of the deep-eutectic solvent composition. The deep-eutectic solvent composition for efficiently extracting the phenolic compounds, provided by the invention, consists of a hydrogen bond acceptor and a hydrogen bond donor in a molar ratio of (1-2): (1-9), the hydrogen bond donor comprises n-caprylic acid or n-hexyl alcohol; the hydrogen bond receptor comprises 1-ethyl-3-methylimidazole chloride or tetrabutylammonium bromide. The eutectic solvent composition has the advantages of high partition coefficient, low viscosity, high selectivity, rapid phase separation, environmental friendliness and the like, can efficiently extract phenol, resorcinol, o-cresol, m-cresol and p-cresol, and has single-stage extraction efficiency gt; the regeneration rate is high, and the method is suitable for high-concentration phenolic wastewater, polyhydroxy phenolic wastewater, continuous process and low-toxicity emission requirement scenes.

The present invention provides a synthesis process of hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate. In the present invention, a solid acid is used as a catalyst, 3-N,N-diethylaminophenol and phthalic anhydride are put into an organic solvent and refluxed; the organic solvent is recovered; then n-hexanol is added to the reaction solution to react to form hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate; then the catalyst is recovered by hot filtration, the organic solvent in the filtrate is recovered under reduced pressure, cooled and crystallized, and filtered to obtain a primary refined product; the mother liquor of the primary refinement is recovered and treated to recover 2-hydroxy-4-diethylamino-2'-carboxybenzophenone and n-hexanol respectively; the n-hexanol in the primary refined product is recovered under reduced pressure, and then secondary refinement is carried out using ethanol as a solvent, decolorized, filtered, cooled and crystallized, centrifuged, and dried to obtain hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate. By adopting the synthesis process of the present invention, the yield is effectively improved, and the production cost is reduced, which is suitable for large-scale production.

The colorimetric LAMP system comprises a colorimetric LAMP reaction mixture and an extraction-free lysis buffer solution. The colorimetric LAMP reaction mixture can be wholly freeze-dried and comprises a primer set, strand displacement polymerase, deoxynucleoside triphosphate, pH indicating dye and freeze-drying protective sugars, including trehalose, raffinose, glucan and mannitol. The extraction-free cracking buffer solution comprises potassium chloride, ammonium sulfate, a cleaning agent and 2-ethylhexyl-1-alcohol; 2-methyl ethylene oxide; the invention relates to a high-efficiency alcohol-based cleaning agent, which is prepared from the following raw materials: ethylene oxide, secondary alcohol ethoxylate, 2-[4-(2, 4, 4-trimethylpent-2-yl) phenoxy] ethanol, 2-[4-(2, 4, 4-trimethylpent-2-yl) phenoxy] ethyl-1-alcohol, and {2-[3, 4-bis (2-hydroxy ethyoxyl) oxalane-2-yl]-2-(2-hydroxy ethyoxyl) ethyoxyl} ethyl laurate. The freeze-dried colorimetric LAMP reaction mixture can be subjected to nucleic acid amplification and detection after being rehydrated by an extraction cracking buffer solution.

The present invention relates to N-methyldihexanolamine and its preparation method and application, belonging to the technical field of preparation of N-methyldihexanolamine. The present invention mainly uses ε-caprolactone and 6-amino-1-hexanol as raw materials, adds lithium aluminum tetrahydride after reaction to generate dihexanolamine, and then reacts with formic acid and formaldehyde and neutralizes with NaOH to obtain. The preparation method of the present invention is simple and easy, the raw materials are easy to obtain, the amount of wastewater generated during the synthesis process of N-methyldihexanolamine can be greatly reduced, and the yield of N-methyldihexanolamine can be greatly improved.

The invention belongs to the technical field of food biology, and relates to blackened jujube juice, in particular to a method for preparing probiotic blackened jujube juice based on solid-liquid step-by-step green precise fermentation. According to the preparation method disclosed by the invention, the probiotic compound combination capable of effectively increasing the viable count is screened and excavated, and the viable count of the probiotics in the product is increased on the basis of retaining rich nutritional ingredients of the blackened jujubes by fermenting the blackened jujube juice, so that the functionality of the product is improved. Through precise fermentation of probiotics, the content of sugar in the blackened jujube juice is further reduced, the content of nutritional ingredients such as organic acid is increased, sugar in the jujube juice is promoted to be efficiently converted into lactic acid (the sugar degradation rate is larger than or equal to 25%) through symbiotic metabolism regulation and control of the two bacteria, meanwhile, key aroma substances such as ethyl acetate and n-hexyl alcohol are generated, and the product is endowed with fresh fruity flavor and low-sugar characteristics; therefore, the flavor and taste of the beverage are improved, and the blackened jujube juice has higher biological functionality; and through the hypoglycemic effect of the probiotics, a healthier beverage choice is provided for people with low sugar requirements, and the huge application potential of a food biotechnology in the field of nutrition and health is shown.

The present application provides a method for determining extractable organic fluorine in textiles by online combustion-ion chromatography system, and relates to the technical field of textile detection. The method specifically comprises the following steps: weighing the textile, immersing the textile in an organic solvent, then performing ultrasonic extraction to obtain an extraction solution; cooling and concentrating the extraction solution, using the same organic solvent to make up the volume to obtain a sample solution; adding n-hexanol to the sample solution for solvent replacement to obtain a test solution; burning the test solution under rich-oxygen high-temperature hydrolysis conditions, using pure water to absorb the generated gas to obtain an absorption solution; using an ion chromatograph to determine the content of fluorine ions in a fluorine ion standard working solution and the absorption solution respectively, drawing a standard working curve, and quantitatively calculating the content of extractable organic fluorine in the textile by external standard method. The method is verified by various textiles, and has good robustness; the loss of volatile substances and background pollution are effectively reduced, and the stability and accuracy of detection are improved.

The invention discloses a sintering slurry, a diffusion layer and a preparation method thereof, and relates to the technical field of capacitor electrode slurry, the sintering slurry comprises the following components in parts by weight: 60-68 parts of silver powder, 23-30 parts of an organic carrier and 6-10 parts of an inorganic additive; the organic carrier is prepared from polymethyl methacrylate, monomer resin, diethylene glycol monobutyl ether, medium-chain unsaturated fatty acid, 2-ethyl-1-hexanol and polyoxyethylene sorbitan monooleate; the inorganic additive comprises nano barium titanate and cerium oxide. According to the invention, the sintering slurry is directionally diffused under the action of gravity in the sintering process to form an internal net-shaped shielding structure, so that the purposes of reducing the manufacturing precision requirement of the ultra-wideband capacitor, improving the pressure resistance, reducing the metal migration risk and improving the design freedom degree are achieved.

The application belongs to the technical field of cosmetics, and particularly relates to an oat whole-component extract, an extraction process thereof, application of the oat whole-component extract in multifunctional cosmetics, and Pickering emulsion. The extraction process comprises the following steps: first, performing subcritical extraction on oat kernel fine powder to obtain oat oil and residues; second, mixing the residues with a buffer solution, performing ultrasonic-microwave assisted extraction, filtering, collecting an extract and filter residues; third, performing carboxylation reaction of the extract with CO2, then performing reaction with 3-diethylaminopropylamine, and finally performing reaction with hexanol to obtain oat alkaloids; and finally, performing extraction of the filter residues in water, and performing enzymatic hydrolysis using cellulase to obtain oat beta-glucan. The extraction process is green and environmentally friendly, and solves the problems of single component, high solvent residue and high energy consumption in the prior art. The extract exhibits significant multifunctional synergistic effect in cosmetics, and has industrialization potential.

The present invention addresses the problem of providing a meat-like food product in which plant-based protein odor is reduced. This meat-like food product contains a plant-based protein. When an odor component of the meat-like food product, which is extracted by the dynamic headspace method, is subjected to gas chromatography-mass spectrometry, the chromatogram obtained satisfies at least one of the following conditions 1 to 5, where the peak area of 3-methylbutanal is noted as A, the peak area of hexanal is noted as B, the peak area of 1-hexanol is noted as C, the peak area of 2-pentylfuran is noted as D, the peak area of 1-pentanol is noted as E, and the peak area of an internal standard substance is noted as F. Condition 1: A / F = 1 to 7.5; Condition 2: B / F = 5 to 65; Condition 3: C / F = 0.01 to 1.9; Condition 4: D / F = 5 to 40; Condition 5: E / F = 3.5 or less

This invention provides a method for the separation and purification of medium-chain carboxylic acids, belonging to the field of chemical separation and purification technology. The method includes pretreatment, alkalization concentration, acidification extraction, and vacuum distillation. In the pretreatment stage, anaerobic fermentation is used to lengthen the carbon chain, followed by filtration. The clarified fermentation broth is then alkalized and concentrated. In an alkaline environment, the carboxylic acid is converted into a non-volatile carboxylate, thus minimizing loss during concentration. After centrifugation to remove precipitated solids, the pH is adjusted to acidity, and extraction is performed using non-polar and / or weakly polar solvents, which improves the extraction rate of the target medium-chain carboxylic acid, the recovery rate of short-chain carboxylic acids, and the purity of the product. Using this separation and purification method, this invention separates and purifies n-hexanol from baijiu (Chinese liquor) lees, achieving a hexanoic acid yield of 77%, a mass purity of 87%, and a total acid purity of 97%.

The application belongs to the technical field of high polymer materials, and particularly relates to a polyurethane adhesive composition and a preparation method thereof, which comprises the following components in parts by weight: polytetrahydrofuran ether glycol 50-55 parts, 6,6'-bis[(3-benzyloxy-1,2-propanediol)oxy]bis(1-hexanol) 8-15 parts, stabilizer 3-5 parts, diisocyanate 35-45 parts, catalyst 0.1-0.5 parts, and defoaming agent 0.8-1.5 parts; the polyurethane adhesive composition of the application, by introducing the stabilizer and 6,6'-bis[(3-benzyloxy-1,2-propanediol)oxy]bis(1-hexanol), and the components in the formula, gives the polyurethane adhesive excellent yellowing resistance, acid and alkali resistance, heat resistance, water resistance and mechanical properties. And the preparation process is relatively simple, does not involve the use of volatile solvents, and is more green and environmentally friendly than the traditional polyurethane adhesive preparation method.

The invention relates to the technical field of food additives, and discloses a perigord truffle-flavored essence as well as a preparation method and application thereof. The perigord truffle-flavored essence is prepared from the following raw materials: caprylic capric triglyceride, propanethiol, dimethyl disulfide, 2, 5-dimethylpyrazine, 2, 6-dimethylpyrazine, n-hexanol, allyl isothiocyanate, 1-octylene-3-alcohol acetate, 3-octanol, 2, 3, 4-trimethyl-1, 3-pentanediol, 2, 3, 4-trimethyl-1, 3-pentanediol, 2, 3, 4-trimethyl-1, 3-pentanediol, 2, 3, 4-trimethyl-1, 3-pentanediol, 2, 3, 4-trimethyl-1, 3- The corrosion inhibitor is prepared from 2, 3, 5-trimethylpyrazine, phenylacetaldehyde, hexanoic acid, octanoic acid, gamma-decalactone, phenethyl isothiocyanate, 1-octylene-3-ol, 3-(methylthio) propyl isothiocyanate and dimethyl thiomethane. The perigord truffle flavor essence provided by the invention is rich in characteristic flavor of perigord truffle, high in smell fidelity and good in high-temperature-resistant stability, the addition amount of the perigord truffle flavor essence in food is small, and the rich characteristic flavor can be provided when the dosage reaches 0.2-0.5 wt%.

This invention belongs to the field of organic synthesis technology, specifically relating to a synthesis process for n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate. This invention uses 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoic acid and n-hexanol as raw materials for esterification, employing solid acid catalyst HND-32 as the catalyst for the esterification reaction. The yield of n-hexyl 2-(4-N,N-diethylamino-2-hydroxybenzoyl)benzoate obtained is consistently above 90%, with a purity above 99.5%. The single-pass conversion rate of benzoic acid is as high as 95%. Furthermore, the solid acid catalyst HND-32 can be reused more than 10 times while maintaining good catalytic performance, avoiding the defects of low yield, high cost, and high waste levels found in existing technologies.

The application relates to the technical field of electrochemical luminescence detection, and discloses a hyaluronidase detection method based on double-potential ratio electrochemical luminescence, which comprises the following steps: uniformly mixing cyclohexane, n-hexanol and triton X-100 in a serum bottle, adding Ru(bpy)3 2+ solution, and then performing magnetic stirring and centrifugal collection of Ru-SiO2 NP precipitates; the electrode after enzymolysis is used as a working electrode, a saturated Ag / AgCl electrode is used as a reference electrode, and a platinum wire electrode is used as a counter electrode to perform electrochemical luminescence detection. Traditional ECL sensors are mostly dependent on a single signal output mode, are easily affected by factors during the detection process, and result in the generation of false positive or false negative results. The application realizes the ultra-low background detection of HAase through the calculation of high / low potential ECL signal ratios, and effectively avoids the generation of false negative and false positive results.

The invention discloses a super-hydrophilic transparent coating based on surface tension adjustment and a preparation method of the super-hydrophilic transparent coating, and belongs to the technical field of functional coating materials. The invention aims to solve the problems that the production process is complicated and the product performance is unstable due to the fact that the existing water-based paint prepared coating depends on a complicated multi-component formula and fine process balance. The invention relates to a super-hydrophilic transparent coating based on surface tension adjustment. The super-hydrophilic transparent coating is prepared from an aliphatic waterborne polyurethane emulsion, a polyisocyanate curing agent, small molecular alcohol and 2-hexanol, the method comprises the following steps: 1, weighing; 2, preparing a water-based emulsion; (3) coating; and 4, post-processing. The super-hydrophilic transparent coating based on surface tension adjustment and the preparation method thereof are provided.

The invention provides a porous organic polymer with a dioxin-connected hexaaza-trinaphthylene structure, a preparation method of the porous organic polymer and application of the porous organic polymer in photocatalytic carbon dioxide reduction. According to the invention, 2, 3, 8, 9, 14, 15-hexol-hexaaza-naphthalene and tetrafluoroterephthalonitrile are used as raw materials to synthesize the POPs containing the hexaaza-naphthalene structure, and the POPs have the advantages of high crystallinity, high specific surface area, porosity and high structural stability; after the POPs containing the high-density nitrogen-rich group structure is subjected to metal modification, a metalized porous organic polymer with a hexaaza-naphthalene structure can be obtained. The metalized porous organic polymer material with the hexaaza-naphthalene structure shows good capability of photocatalytic reduction of carbon dioxide under standard conditions, and has very high use stability.