66 results about "Valeric acid" patented technology

The invention discloses a compound with tyrosinase inhibitory activity and application of the compound in preparation of whitening products, and belongs to the technical field of medicinal chemistry. The compound is 5-(4-hydroxyphenyl)-3-O-glucosyl valeric acid, and is a novel compound. The compound can significantly inhibit the activity of tyrosinase, has the ability of blocking tyrosinase from catalyzing tyrosine to be converted into melanin precursor substances, and directly inhibits the generation of melanin, thereby showing better application prospects and values in skin whitening or skin diseases.

The invention discloses Leishan fish sauce sour essence as well as a preparation method and application thereof. The leishan fish sauce acid essence is prepared from ethyl acetate, absolute ethyl alcohol, ethyl isovalerate, ethyl hexanoate, isoamyl alcohol, furfuryl alcohol, ethyl lactate, ethyl caprylate, acetic acid, diethyl succinate, methyl salicylate, ethyl benzoate, ethyl laurate, hexanoic acid, phenethyl alcohol, 4-methyl guaiacol, ethyl myristate, ethyl palmitate, ethyl oleate, capsicum oleoresin, ethyl phenylacetate and ginger oil. And lactic acid, glycerol triacetate, ocimene, ethyl isovalerate, ethyl butyrate, anethole and phenylacetaldehyde. The Leishan fish sauce sour essence disclosed by the invention is soft and harmonious in overall fragrance, natural and vivid, still has stable flavor characteristics at high temperature, can make up the problem of flavor deficiency in sour soup products, realizes accurate reproduction and controllable release of composite fragrance, improves the standardization level of products, and effectively improves the preference degree of consumers.

A method of improving flavor of a combination of a composition for increasing circulating ketone levels is disclosed. A composition containing (D)-β-hydroxybutyric acid (D-BHB), (D)-β-hydroxyvaleric acid (D-BHV), and (D)-1,3 butanediol (D-1,3BD) is disclosed. Exemplary compositions may be incorporated into food, supplement, and beverage products.

The invention relates to a preparation method of peppermint essence, which solves the problems of quick volatilization and poor durability of the traditional peppermint essence by optimizing the combination of essence components and a slow-release carrier by adopting a multi-layer microcapsule slow-release technology and a nanocapsule technology. According to the method, essence components such as menthol, menthone and leaf isovalerate are mixed with at least two layers of microcapsules, the outer layer microcapsules slowly release fragrance, the inner layer microcapsules quickly release fragrance, and it is ensured that the fragrance is kept for a long time in the using process. Meanwhile, the essence is uniformly dispersed in different carrier systems through ultrasonic-assisted emulsification by adopting a nanocapsule technology, so that the stability and dispersity of the essence are improved. In addition, the temperature-responsive and pH-responsive polymer materials are introduced, so that the release rate of the essence can be adjusted according to the external environment, and the adaptability of the essence is further enhanced.

The invention discloses a blood perfusion adsorbent for adsorbing endotoxin by double acting forces as well as a preparation method and application of the blood perfusion adsorbent. The adsorbent (PS-DVB (at) p (CD-His)) is subjected to raft polymerization through 4-cyano-4-(thiobenzoic acid) valeric acid grafted on the surface of PS-DVB to generate a glycidyl methacrylate brush polymer, and is combined with an L-histidine modified cyclodextrin functional molecule; the positive charges of histidine groups and the hydrophobic cavities of the cyclodextrin are used for realizing electrostatic and hydrophobic interaction to synergistically and efficiently adsorb endotoxin. The materials of the blood perfusion adsorbent are easy to obtain, the cost is low, the blood perfusion adsorbent has good blood compatibility and endotoxin adsorption performance, the development of the adsorbent is beneficial to in-vitro blood perfusion treatment of septicopyemia patients, and the clinical treatment cost is reduced.

The application provides application of a walnut green peel extract in preparation of rumen fermentation regulation products, and belongs to the technical field of feed preparation.The walnut green peel extract in the application is prepared by extracting walnut green peel with an extraction solvent, concentrating the extract into a paste under reduced pressure, and drying and crushing the paste at low temperature.Adding 0.5% of the walnut green peel extract to a high-concentrate sheep feed has the effects of preventing the decrease of rumen pH, increasing the activities of rumen cellulose-degrading enzymes and the acetic acid level, and significantly reducing the concentrations of propionic acid and valeric acid.The experimental results show that, after the rumen fermentation regulation product in the application is used, the average rumen pH of sheep in a whole day is increased by 0.24, the filter paper enzyme activity is increased by 73%, the cellobiase activity is increased by 66%, the acetic acid is increased by 29%, and the propionic acid and valeric acid are respectively reduced by 28% and 43%, which indicates that the product in the application can play a high-efficiency rumen fermentation regulation role in the high-concentrate feeding process of rumen animals.

To provide a beer-taste beverage in which a grassy taste is reduced and a light and brisk aftertaste is imparted, and a method for producing the same. In a beer-taste beverage, the problem of the present application can be solved if at least one of the following (A) to (C) is satisfied. (A) The containing concentration of ethyl 2-methylbutanoate is 15 ppb or more; (B) The containing concentration of ethyl 2-methylbutanoate is 45 ppb or more; (C) The containing concentration of diethyl succinate is 520 ppb or more.

This invention provides a simple method for evaluating whether or not a peptide binds to isovaleric acid. [Solution] A method for evaluating the binding affinity to isovaleric acid, comprising a preparation step of preparing a fluorescently labeled compound in which a fluorescent group is bonded to the α-carbon atom of isovaleric acid, and a contact step of contacting the fluorescently labeled compound with a peptide fragment of an olfactory receptor.

The present disclosure relates to a body-derived odor removal composition. The composition for removing body-derived odors according to the present disclosure contains dimethylhydroquinone as an active ingredient, and thus has significantly excellent effects of removing body-derived odors, preferably body odors caused by nonenal, isovaleric acid, diacetyl, and the like.

The invention relates to the technical field of tipping paper for cigarettes, in particular to flavoring and flavoring tipping paper and a preparation method thereof.The flavoring and flavoring tipping paper comprises a base material and a gloss oil layer arranged on the base material, and the gloss oil layer is formed by printing composite gloss oil on the base material; the compound gloss oil is prepared from the following components in parts by mass: 3 to 5 parts of 2-nonyl alcohol, 3 to 5 parts of hexyl acetate, 5 to 10 parts of isoamyl butyrate, 10 to 15 parts of isoamyl isovalerate, 5 to 10 parts of leaf alcohol, 7 to 10 parts of leaf acetate, 2 to 5 parts of acetic acid, 2 to 5 parts of diethyl malate, 35 to 63 parts of ethanol, 2 to 8 parts of sweetening agent, 10 to 20 parts of acidulant, 1 to 5 parts of vitamin and 65 to 86 parts of water-based gloss oil. The sour agent, the sweetening agent and the vitamins are further introduced through aroma components of specific types and proportions, the taste level can be enriched, harmful substances in smoke can be neutralized in the cigarette smoking process, and the smoking experience of consumers is improved.

The invention provides a pet cleaning agent with dual functions of deodorization and softening and a preparation method of the pet cleaning agent, and relates to the technical field of pet supplies. According to the formula prepared by the invention, based on the principles of sterilization inhibition and neutralization degradation, a bactericide, a deodorant and a hair conditioner (a silicone oil conditioner and a cationic conditioner) are compounded to prepare the pet cleaning agent with dual functions of deodorization and softening. The pet hair conditioner can effectively improve the smoothness, bacteriostasis and deodorization performance and durability of pet hair, and can remove odor generated by ammonia gas, methyl mercaptan, isoamylamine, 3-hydroxyisovaleric acid, trimethylamine, 3-mercapto-3-methyl-1-butanol and 3-methylindole on the body surface of a pet.

This invention discloses a method for preparing capsaicin-like substances by temperature-responsive eutectic solvent extraction, comprising the following steps: drying Yunnan chili peppers (after removing stems and seeds), pulverizing, sieving, and collecting the chili powder; mixing lidocaine (HBA) with six alkane-chain carboxylic acids (valerate, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, and lauric acid) at a 1:1 molar ratio to form a homogeneous and transparent liquid, TRDES; weighing the chili powder, adding it to the TRDES aqueous solution, and extracting by shaking; after extraction, centrifuging, and diluting the supernatant to obtain capsaicin-like substances. This invention uses temperature-responsive eutectic solvent extraction to prepare capsaicin-like substances, which is simple, highly efficient, and allows for the recycling of extraction reagents, effectively saving resources. It has significant practical and industrial value for promoting the large-scale production of capsaicin-like substances and enhancing their high-value applications.

The present invention relates to a masking flavor material, a food product, a method for producing the food product, and a method for masking an odor or a smell of a food product. (1) A masking flavor material comprising isovaleric acid and / or phenylethyl alcohol and a lactone, the weight ratio of (lactone) / (isovaleric acid and phenylethyl alcohol) being 0.1 or more and 1000 or less. (2) The masking flavor material according to (1), wherein one or more selected from the group consisting of isovaleric acid, phenylethyl alcohol and a lactone is (A) a microbial fermentation product obtained from yeast and / or Aspergillus, or (B) a microbial fermentation product obtained from yeast and / or Aspergillus and lactic acid bacteria. (3) A food product comprising the masking flavor material according to (1) or (2), and the content of the lactone is 1 ppb or more on a weight basis. (4) The food product according to (3), wherein the food product does not contain an animal-derived raw material.

The invention discloses hansenula polymorpha strain hanseniaspora sp. MF1 and application of the hanseniaspora polymorpha strain hanseniaspora sp. MF1 in fermentation of mulberry wine, and belongs to the technical field of food biology. According to the invention, a strain of hanseniaspora uvarum sp.MF1 is screened from mulberry fermentation liquor, and is preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number of the hanseniaspora uvarum sp.MF1 is CCTCC NO: M 20232181. According to the compound fermentation method, after main fermentation of saccharomyces cerevisiae is completed, the MF1 strain is sequentially inoculated for secondary fermentation, so that aroma components of the mulberry fruit wine can be remarkably optimized, the proportion of alcohols and esters is generally increased, and the flavor of the mulberry fruit wine is improved; damascenone, 4-terpene alcohol, 2-undecylenal and other high-value characteristic aroma substances are more specifically increased, and the content of n-valeric acid, isovaleric acid and other bad flavor acids is reduced, so that the mulberry wine presents unique and harmonious composite flower and fruit aroma.

The invention discloses a preparation method of composite roasted peanut essence, which belongs to the technical field of essence, and comprises the following steps: preheating peanut oil and caprylic / capric triglyceride; the preparation method comprises the following steps: dissolving ethyl maltol, vanillin, methyl cyclopentenolone, 2, 3, 5-trimethylpyrazine and 2-acetylpyrazine; vanillin propylene glycol acetal, isovaleraldehyde propylene glycol acetal, triethyl citrate, delta-decalactone, delta-dodecalactone and 5-hydroxyethyl-4-methylthiazole are fused to obtain a mixture; dispersing the roasted peanut extract; 2, 3-dimethylpyrazine, 2-methoxyl-5-methylpyrazine and 4-methylthiazole are fused, and then the mixture is subjected to a reaction; the preparation method comprises the following steps: fusing cocaal, dimethyl sulfide, 2-ethyl-3, 5, 6-dimethylpyrazine, 2, 3, 5, 6-tetramethylpyrazine, 2-methylpyrazine, 2-acetylpyridine, 2-methoxy-3. 5. 6-isopropyl pyrazine, 2-methylthio-3-methylpyrazine, isovaleric acid, 1-octylene-3-alcohol, 5-methylfurfural and 3, 4-dimethyl-1, 2-cyclopentanedione; standing is performed; filtering is performed; the fragrance of the roasted peanuts is closer to that of the roasted peanuts which are just taken out of a furnace, and the natural flavor of the roasted peanut essence is increased.

The invention relates to the technical field of bioengineering, in particular to a recombinant halophilic bacterium for producing PHBV by using acetate as a single carbon source and application of the recombinant halophilic bacterium. The expression and / or activity of 2-methyl citrate synthetase and succinate dehydrogenase assembly factor 2 of the recombinant halophilic bacteria provided by the invention are reduced, 3-hydroxyvaleric acid synthetic genes scpA and scpB are overexpressed, an ADP-dependent acetyl coenzyme A synthetase gene acd is overexpressed, and a heterologous monocarboxylic acid transporter gene mctC is expressed. The strain can generate PHBV without adding precursors such as propionic acid and valeric acid, acetic acid or acetate can be used as a sole carbon source to produce PHBV, the yield is close to that when glucose is used as a carbon source, and the problems that the added precursor substances have certain toxicity, so that the growth of thalli is influenced, and the yield is reduced are solved; environmental pollution caused by addition of precursor substances is avoided, and meanwhile, the fermentation production cost of the PHBV is effectively reduced.

This invention provides a copper etching solution, its preparation method, etching method, and application. The copper etching solution comprises 1-30 parts cerium ammonium sulfate, 0-20 parts inorganic acid, 0-20 parts organic acid, and 0-90 parts water. The inorganic acid includes one or more of sulfuric acid, phosphoric acid, hypochlorous acid, chloric acid, boric acid, carbonic acid, nitric acid, nitrous acid, and hydrochloric acid. The organic acid includes one or more of citric acid, acetic acid, tartaric acid, malic acid, formic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, isovaleric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, glycolic acid, acrylic acid, methacrylic acid, lactic acid, gluconic acid, maleic acid, benzoic acid, and salicylic acid. The copper etching solution of this invention exhibits good etching properties for copper and minimal damage to nickel-chromium alloys.

A strawberry according to one embodiment of the present invention includes ethyl acetate, ethyl butyrate, ethyl 2-methylbutyrate, ethyl isovalerate, and ethyl hexanoate as aroma components, wherein the total aroma component content is 1,150-14,100 ppb inclusive.

The application discloses cupriavidus capable of producing polyhydroxyalkanoate by using various carbon sources such as ethanol and application thereof. Cupriavidus The strain sp.ZWJ01 has a preservation number of CGMCC No.37462 in the China General Microbiological Culture Collection Center. The strain can grow and accumulate poly-3-hydroxybutyric acid ester by using various substances such as ethanol, volatile fatty acid and sugar as carbon sources; can grow by using mixed carbon sources of ethanol+propionic acid or ethanol+valeric acid and accumulate poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid ester) in cells; and can grow by using mixed carbon sources of ethanol+gamma-butyrolactone or ethanol+1,4-butanediol and accumulate poly(3-hydroxybutyric acid-co-4-hydroxybutyric acid) in cells, and has a good application prospect.

A solid oral composition, including: (A) 0.00005 mass ppm to 40 mass ppm of a branched fatty acid, (B) pyrazines, and (C) 4-vinylguaiacol. A mass ratio of the component (B) to the component (A), [(B) / (A)], is 0.015 or more. a mass ratio of the component (B) to a total amount of the component (A) and the component (C), [(B) / [(A)+(C)]], is 0.01 or more. The branched fatty acid may be isobutyric acid, 2-methylbutyric acid, or isovaleric acid.

The invention discloses a recyclable bio-based composite material and a blow molding process thereof. The composite material is prepared from the following components in parts by mass: 70 to 80 parts of bio-based PE (Polyethylene), 10 to 25 parts of polyhydroxybutyrate-hydroxyvalerate, 5 to 10 parts of bio-based polyethylene grafted maleic anhydride, 0.2 to 0.6 part of antioxidant and 0.3 to 0.8 part of nucleating agent. The bio-based PE, the poly (hydroxybutyrate-hydroxyvalerate) and the bio-based polyethylene grafted maleic anhydride are compounded, so that the components have a synergistic effect, and the bio-based PE and the poly (hydroxybutyrate-hydroxyvalerate) are combined, so that the possibility of degradation is provided while high melt strength and cycling stability are provided; the bio-based polyethylene grafted maleic anhydride is beneficial for keeping the flowerpot tough in the use and recovery periods and hydrolyzing in the composting period, so that the blow-molded flowerpot has high melt strength, excellent cycle stability and controllable biodegradability at the same time.

This invention discloses an antifouling and antibacterial TPU yacht film and its preparation method, relating to the field of polymer materials technology. In preparing the antifouling and antibacterial TPU yacht film, this invention involves reacting amino POSS with 2-maleimide acetaldehyde, 5-(4-hydroxy-3-methoxy-benzylcarbamoyl)-valeric acid, and ethyl isocyanate to obtain modified POSS; reacting 5-hydroxymethylfurfural with 3-aminopropyl-3-hydroxypropyl dimethylammonium chloride to obtain a chain extender; reacting isophorone diisocyanate sequentially with hydroxyl-terminated methyl-3,3,3-trifluoropropyl (siloxane and polysiloxane) and the chain extender to obtain modified thermoplastic polyurethane; mixing the modified thermoplastic polyurethane with the modified POSS, pouring the mixture into a mold, and thermosetting to obtain the antifouling and antibacterial TPU yacht film. The antifouling and antibacterial TPU yacht film prepared by this invention exhibits excellent antibacterial, antifouling, self-healing, and mechanical properties.

The invention discloses a fried bean sauce flavor essence and a preparation method and application thereof, and the fried bean sauce flavor essence is composed of the following components by weight: soybean salad oil, 2-methyltetrahydrofuran-3-mercaptan, 2-methyl-3-mercaptofuran, methyl cyclopentenolone, 2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, the ointment is prepared from 2, 5-trimethylpyrazine, hexadecanoic acid, octadecanal, allyl disulfide, 2-acetylfuran, isoamyl acetate, soy ketones, anethole, sesame oil, ethyl maltol, ethyl enanthate, 4-ethyl guaiacol, furanone, glacial acetic acid and isovaleric acid. The fried bean sauce flavor essence disclosed by the invention has the characteristics of classic fried bean sauce flavor, strong sauce flavor and mellow meat flavor.

This document discloses personal care compositions and personal care compositions having one or more UV filters. In one aspect, a personal care composition is provided comprising: a mineral UV filter; an SPF enhancer comprising at least one of butyl octyl salicylate, ethylhexyl methoxypropene, octyl dodecyl neovalerate, or water celery extract; and an amino acid.

The present application belongs to the technical field of regenerated cellulose fibers, and particularly relates to a preparation method of chlorophyll modified regenerated cellulose fibers. The present application uses modified aerogel to load chlorophyll, greatly reduces the loss of chlorophyll in the fiber preparation process and subsequent washing process, improves the functional durability of the fiber, and avoids the influence of chlorophyll aggregation in the spinning dope on the mechanical properties of the fiber. The chlorophyll modified regenerated cellulose fiber prepared by the present application is light green in color, has good antibacterial effect while having natural dyeing effect, and the detection shows that the antibacterial rates of the fiber to Staphylococcus aureus, Escherichia coli and Candida albicans are all above 95% after 50 times of washing; the fiber has deodorizing effect, and the removal rates of the fiber to ammonia, acetic acid and iso-valeric acid are all above 90%, the fiber is safe and environmentally friendly, and can be used in various fields such as home textiles, underwear and home clothes.

The invention discloses a degradable low-temperature-resistant adhesive for polar equipment and a preparation method thereof, and the degradable low-temperature-resistant adhesive is prepared from the following components in parts by mass: 30-40 parts of polyhydroxybutyrate valerate, 25-35 parts of rosin modified phenolic resin, 20-30 parts of hydrogenated styrene-butadiene-styrene block copolymer, 5-10 parts of modified nano cellulose, 3-6 parts of sepiolite fiber and 1-3 parts of titanate coupling agent. 8-12 parts of a polyurethane prepolymer curing agent and 0.5-2 parts of an organic zinc catalyst; the total parts of the raw materials are 110 parts. The degradable low-temperature-resistant adhesive disclosed by the invention shows excellent adhesive performance at room temperature and 50 DEG C below zero, has a relatively high degradation rate and a relatively low glass transition temperature, and meets the use requirements of polar scientific investigation equipment.

The application discloses a method for preparing methyl valerate by butene carbonylation, and belongs to the field of catalytic chemistry. Raw materials containing butene, carbon monoxide and methanol are introduced into a reactor loaded with a solid acid catalyst, and a product containing methyl valerate is obtained through reaction. The application provides a new method for preparing methyl valerate by butene carbonylation with a solid acid catalyst. The method for preparing methyl valerate has the advantages of cheap and easily obtained raw materials, small corrosion of the system, easy separation of the product, less waste discharge, easy engineering of the fixed bed process, and suitability for single large-scale production.

This invention relates to a method for reducing malodor by bacterial metabolization of valeric acid, which is a source of malodor. The method comprises contacting valeric acid (VA) with at least two components S1 and S2, and incubating, so that S1 and S2 metabolize valeric acid VA. The invention further relates to a mixture M comprising valeric acid VA, at least one component S1 and at least one component S2. S1 is selected from Bacillus velezensis DSM 34978 and preparations thereof, mutants of Bacillus velezensis DSM 34978 and preparations thereof, Bacillus velezensis DSM 34674 and preparations thereof, mutants of Bacillus velezensis DSM 34674 and preparations thereof. S2 is selected from Bacillus licheniformis DSM 34977 and preparations thereof, mutants of Bacillus licheniformis DSM 34977 and preparations thereof, Priestia megaterium DSM 34980 and preparations thereof, mutants of Priestia megaterium DSM 34980 and preparations thereof, Bacillus subtilis DSM 34981 and preparations thereof, mutants of Bacillus subtilis DSM 34981 and preparations thereof.

The present application relates to a kind of polyester film with environmental response function, it includes the following weight parts component is made: polyhydroxy butyric acid valeric acid copolyester 55-70 parts, polybutylene adipate terephthalate 25-40 parts, modified graphene oxide 3-6 parts, dynamic covalent bond compatibilizer 1-3 parts, nanocellulose whisker 0.5-2 parts and antioxidant 0.5-1.5 parts;The modified graphene oxide is the graphene oxide that surface is sequentially grafted by carboxyl, ester group and alkylamine group, with gradient polarity structure;The dynamic covalent bond compatibilizer is maleic anhydride grafted polypropylene that dynamic covalent bond is introduced in molecular structure, the dynamic covalent bond is selected from at least one of disulfide bond, imine bond, borate bond.The film is reinforced by blending modification and nano filler, significantly improve barrier property and mechanical strength, and all biodegradable, process efficient, applicable to high barrier food packaging, medical sterilization packaging, intelligent response type packaging, flexible electronic device substrate or agricultural mulching film and other fields.

The present application relates to the technical field of tobacco, in particular to a tobacco extract, a preparation method thereof, an aerosol generating substrate and an atomization device. The tobacco extract provided by the present application comprises solanone, maltol, furanone, methylcyclopentenolone, guaiacene, 2-acetylpyrrole, 3-methylvaleric acid, neophytadiene, cedrene diol and nicotine; the mass ratio of the solanone, maltol, furanone, methylcyclopentenolone, guaiacene, 2-acetylpyrrole, 3-methylvaleric acid, neophytadiene, cedrene diol and nicotine is (0.05-0.52):(0.01-0.2):(0.02-0.7):(0.01-0.27):(0.02-0.65):(0.03-0.42):(0.06-0.7):(0.01-0.2):(0.1-3.0):(4.3-15.0). When the specific tobacco extract provided by the present application is heated by an electronic atomization device, most of the smoke flavor substances are easily released, and the cigarette-like feeling is strong.