437 results about "Diacetyl" patented technology

The invention relates to a method for producing natural cream-vanilla condiment, which comprises that using lactic acid bacteria to ferment the fresh milk or milk powder, adding cream into the fermented product, using biological enzyme as protein enzyme and / or lipase to process enzymolysis, heating, concentrating, and emulsifying. The invention can improve 100-500 times of the contents of butanedione, dimethylsulfide or the like. And the inventive condiment can be directly added into food.

The invention discloses diacetyl epoxy glyceryl oleates. The general formula of the diacetyl epoxy glyceryl oleates may be (I) or (II). The diacetyl epoxy glyceryl oleates are more stable and flowable than epoxidized soybean oil, the molecular weight of the diacetyl epoxy glyceryl oleates is low, and the diacetyl epoxy glyceryl oleates have high compatibility with polyvinyl chloride (PVC) and arehigh-performance nontoxic plastic plasticizer. The invention also discloses a method for synthesizing diacetyl epoxy glyceryl oleates by starting from oleic acid, which comprises: performing ester exchange of oleic acid and glycerol in the presence of a catalyst to obtain monooleins; compounding monooleins with acetyl to obtain diacetyl monooleins; and performing an epoxidation reaction in an environment with formic acid and hydrogen peroxide, and thus synthesizing diacetyl epoxy glyceryl oleates.

The invention discloses a preparation process of peony seed oil micro-capsule powder. The preparation process is characterized by sequentially comprising the following steps: (1) dissolving a wall material and an emulsifying agent by using warm water; (2) adding peony seed oil into the dissolved wall material and emulsifying agent, and uniformly mixing and stirring to obtain a mixed solution; (3) homogenizing the mixed solution obtained in the step (2) under high pressure to obtain a solution in a good emulsification state; and (4) spray-drying the solution obtained in the step (3) to obtain the peony seed oil micro-capsule powder, wherein the wall material is one or a mixture of more of sodium caseinate, starch sodium octenylsuccinate, gelatin, arabic gum and malt syrup, and the emulsifying agent is one or a mixture of more of mono-and diglycerides of fatty acids, sodium stearyl lactate and diacetyl monostearin tartrate. The peony seed oil micro-capsule powder prepared by virtue of the process is high in peony seed oil embedding rate and high in grease content; the process flow is simple and efficient, and facilitates large-scale production and application.

The invention relates to a cream cheese and a preparation method thereof. The technical scheme is to use milk fat raw material: 15-85%; whole milk: 10-80%; milk protein raw material: 1-10%; carbohydrate raw material: 1-10%. The present invention expands the raw material source of the cream cheese, uses milk protein raw material, carbohydrate raw material and stabilizer as ingredients, forms a stable texture without whey precipitation, and omits the process step of removing whey. The invention uses lactic acid bacteria including diacetyl lactis streptococcus to mix and ferment the ingredients of cream cheese, so that the product can form a new flavor.

The invention provides enzyme-catalyzed disulfide bond-crosslinked natural polymer hydrogel and a preparation method thereof. The hydrogel comprises a three-dimensional net structure composed of crosslink bonds of cystamine or N,N-diacetyl-L-cystine; under the conditions that horseradish peroxidase is used as a catalyst and a phenol compound is used as an enzyme substrate, sulfydryl-grafted natural polymers are rapidly oxidized to form disulfide bonds, so that the hydrogel is obtained. According to the invention, raw materials are safe in source and environment-friendly, the product has excellent biocompatibility; reaction conditions are mild, and the operation is simple; the system is not required to be additionally added with hydrogen peroxide, and physiological activity of a loaded drug or cells is completely guaranteed.

The invention provides celecoxib and a preparing method thereof. The preparing method of the celecoxib comprises the following steps: mixing 5- (4-methylphenyl) -3-trifluoromethyl-1H-pyrazole and 4-halogen benzene sulfonamide, then dissolving the mixture in the second organic solvent, and then adding alkali and catalyst to obtain the celecoxib after coupling reactions. The 5-(4-methylphenyl) -3-(trifluoromethyl)- 1H-pyrazole:(1) is prepared according to the following procedures: mixing dissolving 1-(4- methylphenyl) -4, 4, 4-trifluoro1, 3-butanedione and hydrazine hydrate in the second organic solvent, then obtaining 5-(4-methylphenyl)-3-(trifluoromethyl)-1H-crude pyrazole after heating and dehydration cyclization reaction; (2), obtaining 5-(4-methylphenyl) -3- (trifluoromethyl)-1H-pyrazole by purifying the crude pyrazole. The preparing method provide by the invention can effectively reduce the content of regional isomers in celecoxib, and dramatically improve the quality of products. The productivity can reach 81.3%, and the content of the regional isomer is 0.01%.

The invention discloses an environment-friendly modified alta-mud and making method, which comprises the following steps: adopting natural polysaccharide without toxicity and harm such as chitosan as modifier to modify sodium-based alta-mud; disposing original mud; allocating chitosan acetic solution; weighing 50-60ml chitosan solution with density at 0. 5-1. 0% and diacetyl degree at 90%; allocating 50g alta-mud into paste-shaped material; stewing; infiltrate the alta-mud completely; placing the paste-shaped material into microwave oven; heating to dry; grinding finely; sieving in the screen at 0. 16mm; obtaining the product with low price, good property and environment friendly without any polluting; fitting for disposing industrial waste water, manufacturing drug and food industry.

The invention discloses two types of flavonoid glycoside compounds which are kaempferol-3-O-[alpha-L-rhamnopyranosyl-(1-3)-(2'' ', 4'' '-O-diacetyl-alpha-L-rhamnopyranosyl)-(1-6)]-beta-glucopyrose galactopyranoside and kaempferol-3-O-[alpha-L-rhamnopyranosyl-(1-3)-(4'' '-O-acetyl-alpha-L-rhamnopyranosyl)-(1-6)]-beta-D-glucopyrose galactopyranoside respectively. The invention also discloses a method for preparing the two types of flavonoid glycoside compounds. Moreover, pharmacological tests prove that the two types of flavonoid glycoside compounds have quite good effects of reducing blood sugar and blood fat and resisting oxidation and cerebral ischemia, and thus, the flavonoid glycoside compounds of the invention can be used for preparing medicaments, food and cosmetics for preventing and treating diabetes, reducing blood fat and resisting oxidation and cerebral ischemia.

A process for synthesizing chenodeoxycholic acid includes such steps as preparing the ester used for cholic acid, preparing diacetyl-12a-hydroxy-methyl cholate, preparing 3a, 7a-diacetyloxy-12-oxy-methyl cholanic acid, preparing 12-oxy- chenodeoxycholic acid, preparing chenodeoxycholic acid, and purifying.

The invention discloses lactobacillus plantarum CGMCC No.12227 having a diacetyl synthesis capacity and an application of the lactobacillus plantarum, and belongs to the field of microbiology. The lactobacillus plantarum has the following properties: (1) the lactobacillus plantarum has a certain acid-resistance capacity and the lactobacillus plantarum is good in growth in an acid environment (pH value is 4.0-6.0); (2) the lactobacillus plantarum has a certain salt-resistance capacity and the lactobacillus plantarum is good in growth with a salt concentration of 2-6%; (3) the lactobacillus plantarum is relatively high in cell autolysis; (4) the strain (the lactobacillus plantarum) is not high in acid producing capacity; (5) the strain is relatively high in diacetyl producing capacity; and (6) the strain is relatively weak in diacetyl decomposing capacity in cells. The lactobacillus plantarum CGMCC No.12227 disclosed by the invention can be used for fermenting food and can effectively improve the content of diacetyl in a finished product; and the lactobacillus plantarum has a certain effect on improving the sensory quality property of the finished product; therefore, the lactobacillus plantarum is quite broad in application prospect.

The invention discloses an application of bacillus subtilis in preparing 3-hydroxy butanone. The related bacteria has been stored now in ''microbiological bacterial preservation and management conmmite normal bacteria center of China'' since November, 23, 2006, the perservation number is CGMCC NO.1869. The application method comprises: (1) bacterial selection, (2) inclined-plane culture activation, (3) seed culturing, (4) fermentating, (5) checkinga nd collecting fermentation product. The invention is characterized by simple operation, low cost, high productivity and high- purity of 3-hydroxy butanone, no generation of united compound by butanedione and 2, 3- butanedione.

The invention belongs to the technical field of liquid detergents, and particularly relates to an infant liquid detergent and a preparation method thereof. The infant liquid detergent comprises water, sodium laureth sulfate, polyoxyethylene cetyl stearyl diether, cocamidopropyl betaine, coconut fatty acid diacetyl amide, a sapindus mukurossi fruit extract, a folium artemisiae argyi extract, an argania spinosa kernel extract, enzyme, sodium chloride, ethylenediamine tetraacetic acid disodium and citric acid. The infant liquid detergent is capable of strongly removing stains, softening clothes and effectively killing bacteria, is free of injury to a hand, free of a residue and can rinse easily.

The invention discloses a process for preparing fresh scent strong-flavor Chinese spirit. The process comprises distiller's yeast preparation, bacterial sludge preparation, construction of bacterial sludge pits and fermenting and distilling, wherein the step of bacterial sludge preparation comprises material pretreatment, culture of methane bacteria liquid and pit sludge fermentation and culture. Sludge pits in which methane bacteria serve as a primary flora and caproic acid bacteria serve as a secondary flora are constructed by adopting common conditions such as tile crocks and pits in common liquor factories, and conditions are created for producing fresh scent strong-flavor Chinese spirits. According to the process, the technical problem of factory-like methane bacteria anaerobic culture is overcome, and preparation of the sludge pits in which methane bacteria serve as the primary flora and caproic acid bacteria serve as the secondary flora is realized. The liquor is brewed by utilizing the prepared sludge pits and process thereof, and a fresh scent strong-flavor Chinese spirit with a primary component of ethyl acetate, a secondary component of ethyl caproate and an auxiliary material of 2,3-butanedione is formed. Partial characteristics of traditional daqu liquor and Xiaoqu wine processes are combined, and a process of the fresh scent strong-flavor Chinese spirit is formed.

The invention discloses a plant composite ferment capable of adjusting intestinal floras and a preparation method thereof. The plant composite ferment is mainly prepared by uniformly mixing botanical raw materials consisting of black fungi, citrus fiber, oat bran and konjak powder according to a certain weight ratio, then adding probiotics for fermentation and carrying out blending with prebiotics and dietary fiber, wherein probiotics are one or more selected from a group consisting of Bifidobacterium adolescentis, Bifidobacterium lactis, Bifidobacterium breve, Bifidobacterium infantis, Bifidobacterium longum, Bifidobacterium bifidum, Lactobacillus acidophilus, Lactococcus lactis subsp. cremoris, Lactococcus lactis subsp. diacetyl, Leuconostoc mesenteroides subsp. mesenteroides, conventional bacterial strains for food production and processing, etc.; and the prebiotics and dietary fiber are one or more selected from a group consisting of inulin, L-arabinose and stachyose. The plant composite ferment provided by the invention can provide beneficial bacteria for the intestinal tracts of people, is applicable as a raw material for metabolism of intestinal floras and has good effect on adjustment of the functions of intestinal floras.

The present invention provides a method for preventing or reducing off-flavor in a beverage. Silane-treated silica filter media are synthesized. By contacting the beverage with the silane-treated silica filter, one or more off-flavor substances or off-flavor precursors bind to the silane-treated silica filter media and are removed. Beverages that tend to develop off-flavor upon storage such as alcoholic, fruit, and vegetable beverages, are suitable for the present invention. The present invention provides a method that can reduce the level of off-flavor substances such as trans-2-nonenal, diacetyl, and cis-3-nonenal. The present invention also provides a method that can reduce the level of off-flavor precursors such as linoleic acid. The silica filter media useful for the present method include rice hull ash, oat hull ash, or diatomaceous earth.

The invention discloses a preparing method of citral. The existing method has high production cost or low yield, thus being difficult to be suitable for scale production. The method adopts dehydrogenated linalool as a raw material which is carried out with catalytic reforming to obtain the citral under the existence of a solvent and a latent solvent and is characterized in that: a catalyst adopted for reaction is molybdenum dioxide diacetyl acetone acid ester, the catalytic reforming is carried out under the existence of acid cocatalyst which is cationic exchange resin with subacidity. The catalyst and the acid cocatalyst improve the reaction yield; in addition, the catalyst and the cocatalyst can be recycled for treatment and conveniently applied mechanically, and the castlyst is environmental friendly.

The invention discloses a bacillus subtilis of high purity 3-hydroxy butanone and appliance, which is characterized by the following: the (Bacillus subtilis)SFA-H31 have been stored in China Microbe Bacterial Preserving Management Committee Common Microbe Center with keeping number as CGMCC NO.1869; this bacillus can yeast and invert amylaceum and can generate goal-product 3-hydroxy butanone without generating butanedione and 2, 3-butanediol and so on 3-hydroxy butanone coproduction compound; this bacterial strain possesses big exploiting value.

Flavor composition suitable for imparting a yogurt flavor to a food product and obtained by fermentation, characterised by a flavor so concentrated that the composition should be diluted at least 2 times, preferably at least 10 times, more preferably at least 50 times to equal the flavor of regular yogurt, which can be obtained by a process, characterised by the following stepsa. fermenting a cheese whey containing medium with a bacterium belonging to the genus Propionibacterium,b. pasteurising the fermentation broth,c. fermenting the pasteurised broth with a yeast preferably one which is unable to ferment lactose,d. pasteurising the fermentation broth,e. optionally adding diacetyl.

The present invention provides a mutant strain of Bacillus subtilis SFA-H31 and includes an optimized method for producing of acetoin using this strain. The advantage of this method to produce acetoin has been defined by its high-yield without mixture with diacetyl or 2,3 butanedinol, both of which are usually accompanied with acetoin in other strain. This Bacillus subtilis mutant strain has been deposited in China General Microbilogical Culture Collection (CGMCC) and the accession number is CGMCC No. 1869, in which the process of fermentation for acetoin production is composed of (1) strain activation, (2) seed culture, (3) fermentation, (4) quantification of substrates and products. Based on current method, the concentration of acetoin in the ferment broth can reach to 35-55 g / L and the conversion rate of glucose to acetoin is in the range of 40-50%.

The invention relates to an anti-mosquito incense containing plant vinegar and application thereof, belonging to the sanitary insecticide article technical field. When made into a solid sheet type, the anti-mosquito incense comprises 45 to 65 percent of plant vinegar, 35 to 55 percent of binder and 0.1 to 1.0 percent of essence; when made into a liquid type, the anti-mosquito incense comprises 90 to 99 percent of plant vinegar, and 4 to 8 percent of essence. The plant vinegar is one or a plurality of bamboo vinegar, wood vinegar and / or grass vinegar; the binder is carbon powder, flour, corn starch, polyvinyl alcohol, WX-602 gelatine powder produced by Juxiang (a name of a company) and sticky wood powder; the essence is one or a plurality of benzyl acetate, citric acid, wintergreen oil, dodecanoic acid, Australian orange essence oil, 2, 3-diacetyl propyl lauric acid ester, menthol and citronella oil. The anti-mosquito incense adopts plant vinegar as the active ingredient, has three functions of killing mosquito, killing fly and killing cockroach with good control effect and solves the problem that the using of chemical anti-mosquito incense can cause the insect to generate resistance to drugs.

The present invention relates to methods and systems for remediating one or more impurities (e.g., diacetyl) that are present in manufacturing an alcohol (e.g., ethanol) from cellulosic biomass. The methods and systems include reacting the one or more impurities with at least one treatment compound (e.g., an oxidizing agent, an alkali compound, or a mixture thereof) to form a reaction product that can be separated from the alcohol.

The invention relates to a method for preparing high-transparency high-strength C.I. pigment yellow 155 (3GW) for water-based ink and water-based paint. According to the method, a diazo salt is obtained through diazotizing 2-amino dimethyl terephthalate in the presence of a transparent regulating substance and is coupled with a coupling component, namely diacetyl-acetyl-p-phenylenediamine, under appropriate conditions so as to obtain a crude pigment, and the crude pigment is subjected to pigmentation and surface treatment so as to obtain a yellow organic pigment with high transparency and high coloration strength. The pigment yellow is applied to water-based ink and water-based paint and has the advantages of good transparency, high strength and good rheological properties.

The invention discloses a synthesis method of 2-deoxy-L-ribose. The synthesis method comprises the following steps: in the presence of acetyl-protected hydroxyl, taking cheap L-arabinose as a raw material to generate beta-bromo-L-triacetyl arabopyranose through bromination under catalysis of iodine; performing elimination reaction in an acetic acid solution which takes zinc powder as a reducing agent to generate 3,4-diacetyl-L-arabinal; performing addition reaction in an acetic acid / acetic anhydride solution of hydrogen bromide to generate an intermediate 2-deoxy-1,3,4-triacetyl-L-ribose; andremoving acetyl stepwise by utilizing Amberlite IR-120 acid resin and a methanol solution containing sodium methylate to finally obtain the target product of the 2-deoxy-L-ribose. The synthesis method has the advantages that the production cost is greatly lowered by utilizing cheap and available raw materials and reagents, reaction conditions are more moderate, the operation process is simple andsafe, the yield of the obtained 2-deoxy-L-ribose is more ideal, and large-scale industrial production can be realized, thus solving the problem of demand quantity of the intermediate-2-deoxy-L-ribosein the field of pharmaceutical and chemical industry.

Zinc compounds adopting 2,6-diacetyl pyridine thiosemicarbazone as a ligand, a synthetic method of the compounds and applications of the compounds are disclosed. The zinc compounds are six Zn complexes adopting 2,6-diacetyl pyridine thiosemicarbazone as the ligand. The zinc compounds are subjected to antitumor activity experiments and are proved to have antitumor functions. A double-function mechanism of a metal active center and compounds having antitumor activity is reasonably utilized to innovatively develop efficient multi-target antitumor metal medicines. Compared with a common antitumormedicine that is cisplatin, the zinc complexes have more efficient activity, the zinc complexes have low activity on human embryonic lung fibroblast WI38, and zinc can adjust a plurality of cell processes, is adopted as an activity center of coenzymes and proteins, and is essential for more than 3000 enzymes and a plurality of macromolecule compounds.

The invention discloses a synthesis process of diacetyl epoxy glyceryl oleate. The synthesis process of the diacetyl epoxy glyceryl oleate comprises the following steps: a, performing esterification reaction: performing esterification reaction on esterification raw materials comprising glycerin and oleic acid under the action of an esterification catalyst at 115 to 190 DEG C for 1.5 to 4.5 hours to produce monoolein; b, performing acetylation reaction: performing acetylation reaction on the monoolein and an acetylation reagent under the action of an acetylation catalyst at 90 to 160 DEG C for 2 to 10 hours to produce diacetyl glyceryl oleate; c, performing epoxidation reaction: performing reaction on the diacetyl glyceryl oleate and hydrogen peroxide under the catalytic action of an epoxidation catalyst and a weak acid at 60 to 80 DEG C for 2 to 4 hours to produce the diacetyl epoxy glyceryl oleate. The prepared diacetyl epoxy glyceryl oleate serving as a plasticizer is applied to plastic, and has the advantages of high stability, high flowability and high compatibility with the plastic.

The invention discloses disinfectant wipes. The disinfectant wipes comprises a wipes body, wherein a mixed liquid is dissolved in the wipes body, and is prepared from a humectant, a solubilizer, a disinfectant, a preservative, a flavor enhancer and deionized water; the humectant is one or more of potassium sorbate, xylitol and chloroacetic acid; the solubilizer is one or more of sodium carboxymethyl cellulose, sodium dodecyl sulfate, polyvinylpyrrolidone, dipotassium glycyrrhizinate and benzalkonium bromide; the disinfect is one or more of alcohol, paeonol, chlorhexidine acetate, baicalin, aloe extract and citric acid; the preservative is one or more of methylparaben, ethylparaben, diacetyl acetoacetate, salicylic acid and aluminum silicate; and the flavor enhancer is one or more of vanillin, menthol, hexanal and leaf acetate. The wipes have soft texture, bright surface and fragrant smell, and the storage time of the wipes can be prolonged.

The invention relates to the technical field of organic solar cells, and specifically relates to an electronic transmission layer applied to a solar cell device. The electronic transmission layer comprises a titanium dioxide layer and an interface decoration layer, wherein the titanium dioxide layer is made of titanium dioxide nanoparticles and chelating agent diacetyl acetone titanic acid diisopropyl ester, and the interface decoration layer is made of ethanol amine. The method effectively improves the electrical properties of a titanium dioxide film through component adjustment and interface decoration, and passivates the surface defects of titanium dioxide. The preparation technology of the electronic transmission layer is simple, and a high-efficiency, stable and no-light-bath solar cell device is obtained.

The invention discloses a method for measuring content of diacetyl in white spirit, and belongs to the field of research for flavor of white spirit. The static headspace sampling technology and the gas chromatography-mass spectrometer (GC-MS) technology are applied to build the method for quickly measuring the content of the diacetyl in the white spirit. A static headspace sampling method is optimized to obtain the optimal static headspace sampling analysis condition including that the alcohol content of a white spirit sample is diluted to range from 10%(V / V) to 30%(V / V), and then gas is sampled after the white spirit sample is incubated at the constant temperature ranging from 70 DEG C to 80 DEG C for 10-25 minutes. Results show that the method has excellent selectivity and sensitivity, and is applicable to quantitatively researching for the diacetyl in the white spirit.

The invention discloses a method for preparing 1,8-menthane diacetyl amide from turpentine, which comprises the following steps: reacting a raw material turpentine or industrial pinene with acetonitrile by using a strong protonic acid water solution as a catalyst to prepare the product; and after the reaction is sufficient, neutralizing the reaction solution with an inorganic strong alkali water solution, adding a non-water-soluble organic solvent for extraction, collecting and standing the organic layer to precipitate the product, filtering, and washing the precipitate to obtain the 1,8-menthane diacetyl amide solid. The 1,8-menthane diacetyl amide product obtained by the method has the advantages of high yield and favorable purity. Compared with the original preparation process, the method uses the cheaper and more accessible turpentine or industrial pinene as the raw material, is simple in process route, and greatly lowers the production cost of the 1,8-menthane diacetyl amide and downstream products thereof. Besides, the method has the advantages of low toxicity, simple operational process and the like.