16 results about "Octanone" patented technology

This invention belongs to the field of biological control technology, specifically relating to the use of volatile compounds produced by *Serratia marcescens* for postharvest disease control and preservation of fruits and vegetables. The steps are as follows: First, a *Serratia marcescens* suspension is prepared by culturing, centrifuging, and resuspending. Then, PDA culture medium is injected into a sterile sealed box. After solidification, the bacterial suspension is inoculated, resulting in sterile sealed box A; or, sterile filter paper completely covering the bottom is placed in a sterile sealed box, and VOCs are added, resulting in sterile sealed box B. Fruits and vegetables in their natural state are placed in sterile sealed boxes A or B to achieve VOCs control of postharvest Penicillium mold. This invention creatively controls postharvest Penicillium mold in fruits and vegetables based on VOCs produced by *Serratia marcescens*, and introduces 2-octanone, 2-nonanone, or 2-nonanol as characteristic volatiles through component analysis, effectively achieving postharvest Penicillium mold control and preservation of fruits and vegetables with significant effects and broad application prospects.

The invention belongs to the technical field of biological control, and particularly relates to application of volatile compounds generated based on serratia rubra to postharvest disease control, storage and preservation of fruits and vegetables. The method comprises the following steps: firstly, preparing serratia rubra suspension through culture, centrifugation and resuspension, then injecting a PDA culture medium into a sterile sealing box, and inoculating the bacterium suspension after solidification to obtain a sterile sealing box A; or placing a sterilized filter paper sheet completely covering the bottom in the sterile sealing box, and dropwise adding VOCs to obtain a sterile sealing box B; fruit and vegetables in a natural state are placed in the sterile sealing box A or the sterile sealing box B, so that the prevention and treatment of the picked penicilliosis of the fruits and vegetables by the VOCs can be realized. The fruit and vegetable postharvest penicilliosis is creatively controlled on the basis of VOCs generated by serratia rubra, 2-octanone, 2-nonanone or 2-nonanol is introduced as a characteristic volatile matter through component analysis, control, storage and preservation of the fruit and vegetable postharvest penicilliosis are effectively achieved, the effect is remarkable, and the application prospect is wide.

The present invention relates to conjugates comprising a polysaccharide comprising a 3-deoxy-D-mannan-octanone acid (KDO) moiety, in particular conjugates produced using a random conjugation process, processes for preparing such conjugates, immunogenic compositions and vaccines comprising the conjugates, and therapeutic methods or medical uses using the compositions and vaccines.

The invention belongs to the technical field of fermentation engineering, and particularly relates to Wickerhamomyces anomalus JG-WA1 and application thereof in aroma-enhancing fruit wine. A strain of aroma-enhanced Wickerhamomyces anomalus JG-WA1 is screened from distiller's yeast, apple juice is inoculated with the strain for primary fermentation, then saccharomyces cerevisiae is inoculated for secondary fermentation, and the aroma-enhanced fruit wine is prepared. The content of unpleasant odor substances such as acetone, 4-methyl-1-pentanol, 2-butanol, dimethyl disulfide, 3-hexanone and the like with pungent smell of alcohol or mildew odor and the like in the fruit wine is obviously reduced, while the content of 2-pentanol, ethyl propionate, propyl acetate, 3-methyl-2-pentanone, 3-pentene-2-ketone, hexyl hexanoate, ethyl hexanoate, methyl acetate, heptanal, 2-octanone, 2, 3-pentanone, ethyl hexanoate, ethyl hexanoate, methyl acetate, heptanal, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate, ethyl hexanoate and ethyl hexanoate is obviously reduced. The content of fruit flavor components such as 2, 3-dimethylpyrazine is greatly increased, the brewed apple wine is obvious in ester flavor and transparent and bright in color, and the flavor quality is obviously improved.

The application provides a kind of thiazole amine-diazabicyclo octanone conjugate derivative and its use, belong to the field of medicine.The compound provided by the application has good, broad-spectrum inhibitory activity on metal beta lactamase (MBL) and serine beta lactamase (SBL), and can be used for preparing MBL and / or SBL inhibitor.The compound of the application has great potential in preparing MBL and / or SBL inhibitor and antibacterial drug (especially drug for resisting drug-resistant bacteria).

The application discloses a strain of Scheffersomyces fibuliger and a microbial agent and application thereof, and belongs to the field of biology.The Scheffersomyces fibuliger (Scheffersomyces fibuliger) Cyberlindnera fabianii ) LZLJ1-6 has a preservation number of CCTCC NO: M 2025590. Pure-strain fermentation of the strain can metabolically produce a plurality of flavor substances such as secondary octanone, nonanal and heptyl alcohol. Application of a microbial agent containing the strain to rice wine fermentation can significantly increase the richness of flavor substances in the rice wine, including a plurality of alcohol, ester, ketone, acid and phenolic compounds, and meanwhile, the content of some original flavor substances is increased. The strain provided by the application has characteristics in flavor metabolism, is particularly outstanding in synthesis of characteristic aroma components such as secondary octanone, and has important significance for enriching flavor levels and improving aroma complexity in wine production, especially rice wine fermentation, and also provides high-quality strain resources for development of new fermented foods.

The present invention relates to a biocatalytic process for the production of aroma chemicals by carboligation using a transketolase (EC 2.2.1.1) as shown for transketolase from Geobacillus stearothermophilus and several sequence variants to catalyse the conversion of a donor molecule selected from 2-oxobutanoic acid and 3-methyl-2-oxopentanoic acid and an acceptor molecule selected from propanal and 2-methylbutanal, two identical or different donor molecules, or two identical or different acceptor molecules, thereby obtaining a coupling product in the presence of coenzyme thiamine diphosphate, the products being 3-hydroxy-5-methyl-heptan-4-one, 4-hydroxy-5-methyl-heptan-3-one, 5-hydroxy-3,6-dimethyl-octan-4-one and 4-hydroxy-hexan-3-one as precursor for filbertone.

The invention discloses a simple preparation method of fresh alcohol, and belongs to the technical field of fine chemical engineering and flavors and fragrances. According to the method, 3-octanone and propionaldehyde are used as reaction raw materials, aldol condensation reaction is firstly carried out under the action of a catalyst, then the aldol condensation reaction is reduced by using a reducing agent, and finally the fresh alcohol is obtained after flash evaporation and purification. The reaction conditions are mild; the nitrogen-containing organic alkali is used as a catalyst, so that the use of corrosive liquid alkali is avoided, and the problems of equipment corrosion and wastewater treatment are reduced; the nitrogen organic base catalyst can be in full contact with a liquid reactant, and a flash evaporation purification process is utilized, so that the yield is high; raw materials are easy to obtain, process steps are simple, the method is suitable for large-scale industrial production, and production cost is reduced; in conclusion, the method has the advantages of simplicity in operation, mild reaction conditions, high safety, high product purity and low cost, industrial production is easy to realize, and the method has important application value in the technical field of preparation of fresh alcohol.

The present application relates to the technical field of leather processing, specifically disclosing a leather suede finishing agent, a finishing process, and leather. The leather suede finishing agent is primarily made from the following raw materials: a water-based acrylic prepolymer emulsion, fatty alcohol polyoxyethylene ether, isopropyl alcohol, dipropylene glycol methyl ether, and anionic dye water; the water-based acrylic prepolymer emulsion is primarily made from the following raw materials: butyl acrylate, styrene, 5-hexanenitrile, dimethylpropylsulfonamide ethyl methacrylate, methacrylic acid, an initiator, p-toluenesulfonic acid, 8-hydroxy-2-octanone, succinic acid dihydrazide, an emulsifier, a feel agent, and water. This leather suede finishing agent not only reduces the amount of dye water used but also improves the leather's color fastness to friction, water, and aging. It also makes the leather suede surface more uniform, feels fuller, has high color fastness, and produces bright and natural colors.

The invention belongs to the technical field of new energy battery recovery, and discloses an electrolyte leaching solvent as well as a preparation method and application thereof. The electrolyte leaching solvent comprises a first component, a second component, a third component, a fourth component and a solubilizing solvent; the first component is selected from esters; the second component is selected from nitriles; the third component is a compound as shown in a formula I, and R1-R6 in the formula I are the same or different fluorine substituent, methoxyl, ethoxyl, fluorine-substituted methoxyl, fluorine-substituted ethoxyl or phenoxyl. And the fourth component is at least one of perfluoro hexanone, perfluoro heptanone, perfluoro octanone and perfluoro nonanone. The electrolyte leaching solvent has the good lithium salt leaching rate, through cooperative use of the third component, the fourth component and the hydrotropy solvent, flame retardance of the volatile solvent is synergistically achieved, the leaching solvent has the property of high flash point or even no flash point, and the safety of the leaching solvent in the large-batch use process is greatly guaranteed.

The application provides a method for predicting volatile substances in breast milk and mother's diet and application thereof, comprising: obtaining diet information of a mother, performing nutrition element calculation on the diet information, inputting a prediction model, and predicting the content of volatile substances in breast milk; obtaining volatile substances in breast milk, inputting the prediction model, and predicting the diet information of the mother; the prediction model is obtained by using single factor variance analysis and multivariate linear regression analysis; wherein the volatile substances in breast milk include one or more of caprylic acid, 4-octanone, ethyl caprylate, nonanal, ethylbenzene and decane; and the mother's diet includes one or more of protein, fat, dietary fiber, cholesterol and folic acid. The volatile components in breast milk are separated by using HS-SPME-Arrow for the first time, and combined with chemometrics, so that the change of volatile flavor substances in breast milk can be rapidly and accurately detected.

The invention discloses a preparation method of a cobalt oxide-based composite material for 3-octanone detection, which comprises the following steps: respectively dissolving cobalt nitrate hexahydrate and 2-methylimidazole in methanol to obtain a cobalt nitrate methanol solution and a 2-methylimidazole methanol solution; injecting the titanium dioxide quantum dot colloid into a cobalt nitrate methanol solution, and stirring to form a uniform colloid; slowly adding the mixed colloid into a 2-methylimidazole methanol solution, continuously stirring to generate purple suspension, centrifuging, cleaning and drying to obtain purple powder; and calcining to obtain the cobalt oxide-based composite material. Due to the introduction of titanium dioxide, the hollow structure of cobalt oxide is distorted, the grain size is reduced, the specific surface area is increased, and an energy band is bent; the charge modulation effect of the titanium dioxide / cobalt oxide heterojunction interface significantly improves the sensitivity and selectivity of the cobalt oxide-based sensor to 3-octanone.

The invention discloses a deodorizing method of a regenerated polypropylene material. According to the deodorizing method of the regenerated polypropylene material, supercritical CO2 extraction treatment is carried out on the regenerated polypropylene material by adopting an extracting agent, wherein the extracting agent comprises supercritical CO2 and a cosolvent; wherein the volatile odor substance of the regenerated polypropylene material comprises one or more of isoparaffin with 10 to 20 carbon atoms, isoolefin with 10 to 20 carbon atoms, decane, n-dodecane, n-tetradecane, octanal, hexanal, limonene, isoterpinene, octanone and terpene alcohol. The odor removal method can effectively remove volatile odor substances in the regenerated polypropylene material, and the odor grade of the obtained regenerated polypropylene material can meet the application requirements of automotive interiors.

The application provides a Leuconostoc mesenteroides, which is Leuconostoc mesenteroides zqw123 preserved in the China General Microbiological Culture Collection Center, and has a preservation number of CGMCC No.25154. The Leuconostoc mesenteroides has the capability of simultaneously producing organic acids such as acetic acid, isovaleric acid, hexanoic acid, iso-octanoic acid, octanoic acid, nonanoic acid and n-decanoic acid, organic alcohols such as n-heptanol and 1-nonanol, and aldehyde ketone compounds such as phenylacetaldehyde, 2,3-dihydro-2,2,6-trimethylbenzaldehyde, sec-octanone and geranylacetone, and can provide rich flavoring substances for liquor brewing, and has a good application prospect.

Low molecular weight heparin (LMWH) suitable for equivalent use with USP enoxaparin sodium is prepared from starting materials isolated from engineered E. coli K5 capsular polysaccharides (e.g., E. coli K5 heparin precursors). The Escherichia coli CPS is treated with an acid to remove 3-deoxy-D-mann-oct-2-ketonic acid (Kdo) residues and is further hydrolyzed by alkali treatment to form a low molecular weight N-sulfo, N-acetylheparin precursor (LMW-NSNAH) having a molecular weight and a degree of N-acetylation comparable to that of enoxaparin. The LMW-NSNAH is modified and converted into the LMWH through a series of enzymes of C < 5 >-epimerase, 2-O-sulfotransferase, 6-O-sulfotransferase and 3-O-sulfotransferase. The composition including LMWH is prepared without the use of porcine heparin, so that the raw materials can be obtained more easily, the production process can be better controlled, and the concern of contamination, adulteration or animal viruses or impurities is reduced. In addition, the LMWH product is proved to be structurally and functionally comparable to the traditional drug LMWH.

The invention belongs to the technical field of proton exchange membrane fuel cells, and provides catalyst slurry and a preparation method thereof, and a membrane electrode and a preparation method and application thereof. The catalyst slurry provided by the invention comprises a Nafion ionomer, a platinum carbon catalyst, naphthenone (including one or more of cyclobutanone, cyclohexanone and cyclooctanone), water and isopropanol. According to the invention, cycloalkanone is added, and cycloalkanone can form a stable structure with water and Pt in the platinum-carbon catalyst through specific adsorption, which is specifically embodied in that on one hand, cycloalkanone and water molecules form hydrogen bonds to capture water and participate in construction of a proton transmission channel; on the other hand, the naphthenone and Pt in the platinum-carbon catalyst interact to firmly fix water molecules around the Pt, so that when the overall temperature exceeds the vaporization temperature of the water, the naphthenone molecules cannot be lost due to vaporization of the water, the structural damage cannot be caused, and the constructed proton transmission channel is stabilized.