55 results about "Palmitates" patented technology

The invention relates to the technical field of titanium dioxide production, in particular to high-retention and high-weather-resistance titanium dioxide as well as a preparation method and application thereof. Comprising a titanium dioxide base material and a coating layer located on the surface of the titanium dioxide base material, and the coating layer sequentially comprises an aluminum oxide film layer, a tin oxide film layer and an ascorbyl palmitate film layer from inside to outside. The preparation method comprises the following steps: preparing titanium dioxide-based material slurry, sequentially carrying out aluminum oxide coating and tin oxide coating, then carrying out water washing, flash evaporation and steam powdering, and adding ascorbyl palmitate in the steam powdering process to obtain the high-retention and high-weather-resistance titanium dioxide. The tin coating layer and the ascorbyl palmitate coating layer are introduced to the outer side of the aluminum oxide coating layer, so that the retention rate and weather resistance of titanium dioxide in paper are remarkably improved, and the use requirements of high-end paper are met; the white water treatment pressure can be reduced, and the economic benefit is improved.

The invention discloses application of a lycium barbarum Lb03G03224 gene in catalysis of esterification of free carotenoids, the nucleotide sequence of the lycium barbarum Lb03G03224 gene is as shown in SEQ ID NO: 1, and the amino acid sequence of encoded protein is as shown in SEQ ID NO: 2. According to the present invention, it is found that the zeaxanthin dipalmitate and the isomer 9 (Z)-zeaxanthin dipalmitate thereof can be generated when the Lb03G03224 gene is expressed in the engineering escherichia coli for generating beta-carotene, beta-cryptoxanthin and zeaxanthin, such that the zeaxanthin dipalmitate and the isomer 9 (Z)-zeaxanthin dipalmitate can be produced, the protein coded by the Lb03G03224 has the function of catalyzing esterification reaction of carotenoid containing free hydroxyl and fatty acid acyl donor, and has important application value in in-vitro biosynthesis of esterified carotenoid.

The invention belongs to the technical field of resveratrol synthesis, and particularly relates to a preparation method of resveratrol and application of resveratrol in meat preservation. The method comprises the following steps: taking 3, 5-dimethoxybenzoic acid as a raw material, and carrying out acylation reaction to obtain 3, 5-dimethoxybenzoyl chloride. Then reacting with p-acetoxystyrene to generate 3, 3 '-dihydroxy-3, 3'-dihydroxy-3 The preparation method comprises the following steps: taking 1, 5-dimethoxy-4 '-acetoxystilbene as a raw material, hydrolyzing and demethylating to obtain resveratrol, and preparing resveratrol lipid nanoparticle suspension by taking resveratrol, a ZIF-8 / chitosan compound, compound lipid, cholesterol, epsilon-polylysine, ascorbyl palmitate and phosphate buffer saline as raw materials. High load and controlled release of resveratrol are achieved, and the problems that resveratrol is poor in water solubility and prone to oxidation are solved.

This rotigotine-containing adhesive patch comprises a support layer and an adhesive layer, wherein the adhesive layer contains: at least one selected from the group consisting of rotigotine and pharmaceutically acceptable salts of rotigotine; a rubber-based adhesive base; and an antioxidant. The antioxidant includes propyl gallate, ascorbyl palmitate, and sodium pyrosulfite.

This invention discloses a soothing and repairing composition and its application, comprising the following raw materials: phytosterols, chamomile extract, hydrolyzed sodium hyaluronate, tocopherol, ceramide NP, triethanolamine, lactobacillus, macadamia seed oil, magnolia alcohol, matricaria flower extract, maltodextrin, lecithin, phosphatidylcholine, ascorbyl palmitate, inulin root juice, arginine / lysine polypeptide, squalane, jojoba seed oil, scutellaria baicalensis root extract, polygonum cuspidatum root extract, fructose, glycerin, p-hydroxyacetophenone, butylene glycol, acrylate / C10-30 alkanol acrylate crosspolymer, α-glucan oligosaccharide, 1,2-hexanediol, and water as the balance. Compared with the prior art, the soothing and repairing composition prepared by this invention has the effects of rapidly rebuilding the skin barrier, regulating skin immune function, improving skin microecology, synergistic effect, and rapid skin repair.

The present invention provides pharmaceutical compositions comprising a therapeutically effective dose of vitamin A palmitate; processes for their preparation, and uses and methods of treatment comprising them. The compositions provided by the present invention may be used in the treatment and / or prophylaxis of conditions and diseases caused by vitamin A deficiency.

The present application relates to the field of feed additive, and discloses a feed additive, a preparation method and application thereof.The feed additive contains astaxanthin, curcumin, vitamin C palmitate, vitamin E, vitamin D3, piperine and a carrier.The preparation method comprises the following steps: mixing astaxanthin, curcumin, vitamin C palmitate, vitamin E, vitamin D3, piperine and the carrier.The feed additive can significantly improve the stress resistance, immunity, antioxidant capacity and disease resistance of aquatic animals, and has significant economic benefits.

The application provides a crude oil direct oiling type spinning oil, a preparation method and application. The crude oil direct oiling type spinning oil comprises 65-75% of a composite smoothing agent, and the composite smoothing agent is composed of tetradecyl tetradec-9-enoate 25-35 parts and PEG-12 dipalmitate 65-75 parts. The composite smoothing agent is composed of specific compounds, so that the spinning oil can have smoothness, oil film strength and heat resistance; meanwhile, the friction coefficient of the yarn can be reduced and the uniformity of the yarn can be improved, and the quality of the yarn is good.

The application relates to the technical field of feed additives, and discloses a monensin premix and a preparation method thereof.The raw material composition of the monensin premix comprises monensin, a carrier, a surfactant, a binder, amino acid chelated trace elements, vitamin E, ascorbic acid palmitate and coenzyme Q10.The preparation method comprises the following steps: S1, stirring and mixing monensin and the carrier to prepare a mixture I; S2, dissolving the binder in a water bath at 80-100 DEG C, cooling to room temperature, adding the mixture I and the remaining raw materials, and stirring and mixing to prepare a mixture II; S3, uniformly treating the mixture II to prepare an intermediate product; and S4, preparing the intermediate product into granules by using a spray drying method, so that the monensin premix is obtained.The monensin premix prepared by the application is uniform in granularity, good in stability and uniformity, and high in drug efficacy.

The invention relates to eye drops containing umbilical cord mesenchymal stem cell exosomes. The eye drops are prepared from the following raw materials: sodium hyaluronate, an L-ascorbyl palmitate / hydroxypropyl-beta-cyclodextrin inclusion compound, panthenol, a solution containing the umbilical cord mesenchymal stem cell exosomes, water and normal saline, the concentration of the sodium hyaluronate is 0.2 to 0.6 mg / mL; the concentration of the L-ascorbyl palmitate / hydroxypropyl-beta-cyclodextrin inclusion compound ranges from 0.1 mg / mL to 0.4 mg / mL; the concentration of the panthenol is 0.2 to 1.0 mg / mL; the concentration of the umbilical cord mesenchymal stem cell exosome is 0.2 * 10 < 10 >-0.6 * 10 < 10 > parts / mL. The eye drops have good effects on treating xerophthalmia and repairing corneal epithelium injury.

The invention provides a method for preparing dehydroepiandrosterone, which comprises the following steps: S1, taking 4-androstene-3, 17-diketone as a raw material to react to generate 5-androstene-3, 17-diketone; s2, sodium acetate is dissolved in a buffer system, ascorbyl palmitate, L-glutathione, the 5-androstene-3, 17-diketone, ketoreductase, coenzyme and a coenzyme regeneration system are sequentially added for a reaction, and dehydroepiandrosterone is obtained. According to the invention, the ascorbyl palmitate, the L-glutathione and the sodium acetate cooperate to inhibit the side reaction of an intermediate product, active oxygen and the like to generate impurities, so that the purity and the yield of the dehydroepiandrosterone are improved, the purity of the final product dehydroepiandrosterone is as high as 99%, and the yield is as high as 95%.

The application discloses isobutyryl amino thiazyl resorcinol dipalmitate and a preparation method and application thereof. The compound is successfully prepared by performing an acylation reaction on isobutyryl amino thiazyl resorcinol and palmitic acid. Experiments prove that, compared with the prior art, the compound not only retains excellent whitening efficacy, but also exhibits extremely low cytotoxicity and significant soothing efficacy. The compound has whitening, soothing and high safety, overcomes the defect that traditional whitening agents are strong in irritation, and can be directly applied to cosmetics or skin external drugs, and has extremely high industrial value.

The application relates to the field of biological medicine, and discloses ascorbyl palmitate nanoliposomes capable of inducing tumor cell oncosis, a preparation method and application thereof. The nanoliposomes are constructed by inserting ascorbyl palmitate as a lipid component into a phospholipid bilayer, and are prepared by a film dispersion method from lecithin, cholesterol, pegylated phospholipid and ascorbyl palmitate. The average particle size of the nanoliposomes is 80-150 nm, the encapsulation rate is high, and the stability is good. The nanoliposomes can be administered through a tail vein, utilize the specific hydrolysis of matrix metalloproteinase MMP-2 which is highly expressed by tumor cells to hydrolyze ascorbyl palmitate, release palmitic acid and ascorbic acid, thereby inducing Caspase-independent oncosis of tumor cells, effectively overcoming apoptosis-related drug resistance, and reversing a tumor immunosuppressive microenvironment. The nanoliposomes avoid the cumulative toxicity of metal-type inducers, and provide a new safe and effective option for reversing chemotherapy resistance.

The invention belongs to the technical field of imbibition oil extraction, and provides a water-based nano-emulsion imbibition oil displacement agent and a preparation method thereof. According to the preparation method of the water-based nano-emulsion imbibition oil displacement agent, polyoxyethylene lauryl ether, sorbitan monopalmitate, mahogany petroleum sulfonate, an oily solvent, nano silicon oxide and water are uniformly mixed through a phase transition component method to prepare the water-based nano-emulsion imbibition oil displacement agent. The preparation method of the water-based nano-emulsion imbibition oil-displacing agent can effectively improve the crude oil recovery rate of unconventional oil reservoirs.

The invention discloses a rhizoma polygonati anti-aging extract and a preparation method thereof. The method comprises the following steps: pre-treating raw materials by adopting a composite cleaning agent containing green tea polyphenol and a ginger extract; soaking with a sugar protecting agent containing fructo-oligosaccharide and L-ascorbyl palmitate; carrying out nine-steaming nine-drying treatment after gradient ultrasonic cleaning, and recovering polysaccharide in condensed water through spiral condensation, centrifugation and ceramic membrane filtration in the steaming process; the preparation method comprises the following steps: extracting with hot water, heating and concentrating, mixing the obtained extract with polysaccharide recovered from condensed water, compounding with a cistanche deserticola extract according to a ratio of 3: 2, mutually dissolving with a composite cosolvent, carrying out gelatin-Arabic gum microencapsulation, and finally granulating with a slow-release matrix. According to the invention, the problems of loss of pretreatment polysaccharide, waste of active ingredients of condensed water, poor stability of terminal products, asynchronous release and the like are solved through a full-chain technology, and the retention rate, the stability and the anti-aging synergistic effect of the active ingredients are remarkably improved.

The application provides a kind of tea polyphenol ester-RNA self-assembly and hybrid nanovesicle of probiotic outer membrane vesicle and preparation method thereof, which first adjusts the hydrophilicity and hydrophobicity of tea polyphenol EGC through molecular modification strategy, and the EGC palmitate obtained by modification can directly wrap RNA and self-assemble into tea polyphenol ester-RNA nanovesicle, which has superior encapsulation capacity. Further introduce OMVs as intestinal targeted delivery carrier and fuse with RNA-tea polyphenol nanovesicle to form a structure stable hybrid vesicle. The hybrid vesicle of the application ingeniously integrates the advantages of both sides: tea polyphenol ester-RNA nanovesicle ensures efficient encapsulation of RNA, and OMVs provide natural protection for its translocation through gastrointestinal tract, and promote intestinal cell uptake with its inherent bioadhesion. This strategy can effectively promote the encapsulation and stabilization of oral RNA delivery.

Stabilized oils including an edible oil and an antioxidant composition comprising α-lipoic acid and least one of ascorbic acid, ascorbyl palmitate, green tea extract, lecithin, and rosemary extract or at least one of 1,2,4-benzenetriol, carnosic acid, dihydromyricetin, dihydrorobinetin, epigallocatechin, gallic acid, 3-hydroxytyrosol, myricetin, and nepodin, and methods of preparing such stabilized edible oils. The stabilized oils may have an Oxidative Stability Index (“OSI”) at 110° C. of at least 30 hours.

The application belongs to the technical field of compositions, and provides a moisturizing eye composition, a preparation method and application thereof. The moisturizing eye composition provided by the application is combined by soybean lecithin, retinol palmitate liposome, lutein, oligomeric hyaluronic acid and ethylenediaminetetraacetic acid in a specific ratio, and good synergies can be achieved among the components, the effect of relieving asthenopia, protecting eyesight and maintaining normal vision is improved, and the effect of improving and relieving the symptoms of dry eyes and dry eyes caused by various reasons (such as fatigue, wearing contact lenses, using electronic products, overuse of eyes, etc.) is improved.

The invention relates to nutritional soft sweets containing lutein ester microcapsule powder and a preparation method of the nutritional soft sweets. The soft sweets comprise the following raw materials in percentage by weight: 15-20% of lutein ester microcapsule powder, 60-70% of soft sweets matrix, 1-3% of auxiliaries and the balance of drinking water, the lutein ester microcapsule powder is prepared from the following raw materials in percentage by weight: 10 to 15 percent of lutein ester crystals, 10 to 12 percent of vegetable oil, 0.5 to 1 percent of ascorbyl palmitate, 8 to 12 percent of starch octenyl succinate, 5 to 8 percent of succinylated black bean protein, 1.5 to 2.5 percent of blueberry polysaccharide and the balance of drinking water. The soft sweets provided by the invention can realize long-acting stability of lutein ester, and finally guarantee persistence of an eye protection effect.

The application discloses a process method for co-production of L-ascorbyl palmitate and biodiesel, which comprises the following steps: performing a first enzyme catalysis reaction on L-ascorbic acid and palm oil to obtain a first enzyme catalysis mixture; performing layer separation and vacuum distillation treatment on the first enzyme catalysis mixture to obtain a first enzyme catalysis product; performing a second enzyme catalysis reaction on the first enzyme catalysis product to obtain a second enzyme catalysis mixture; and performing distillation treatment on the second enzyme catalysis mixture under online dehydration conditions to obtain L-ascorbyl palmitate and biodiesel; the application utilizes the solubility of L-ascorbic acid in short-chain alcohol, promotes mutual solubility of L-ascorbic acid and palm oil, adopts two-step enzyme catalysis reaction under mild conditions, realizes reaction of L-ascorbic acid and palm oil catalyzed by lipase to generate L-ascorbyl palmitate, and realizes reaction of palm oil and short-chain alcohol catalyzed by lipase to generate biodiesel, so that integrated co-production of various high-value-added products is realized.

This invention provides an environmentally friendly and non-toxic fire extinguishing agent and its preparation method, relating to the field of fire extinguishing technology. The environmentally friendly and non-toxic fire extinguishing agent includes a fire extinguishing material that decomposes and releases substances with fire extinguishing properties during heating, and a heat-sensitive controlled-release layer. The fire extinguishing material is composed of the following components by weight: 60-70 parts of nano-sized sodium bicarbonate and 1.5-2.5 parts of silica aerogel particles. The heat-sensitive controlled-release layer is composed of modified natural sodium-based montmorillonite and palmitate. In the early stages of lithium battery thermal runaway, when local temperatures rise to 50-90°C, ThermoCap-SB can actively trigger and suppress the chain reaction before the flames ignite, thus extinguishing the fire and preventing it from escalating. The components are non-toxic and have a resistivity >10. 12 It is Ω·cm and pH neutral, and can be used to extinguish fires involving live equipment. It does not damage the BMS circuit board, does not cause secondary short circuit risks, and does not require strong acid neutralization after extinguishing the fire, which greatly reduces operation and maintenance costs.

To provide a method for producing dextrin fatty acid esters, and a transparent oil gel and a transparent solid cosmetic containing dextrin fatty acid esters produced by the said method. [Solution] Dextrin can be dispersed in an organic mixed solvent containing a hexane-based solvent, then a fatty acid halide is added and reacted, and after the reaction is complete, water is added to induce layer separation and separate the upper layer liquid, and crystals can be precipitated from the upper layer liquid to provide a dextrin fatty acid ester. In particular, by providing a transparent dextrin palmitate that has strong gel strength, it is possible to provide a transparent oil gel composed of the dextrin palmitate and oil, and a variety of transparent solid cosmetics using the same.

The invention discloses a moisturizing and repairing matte lipstick and a preparation method thereof in the field of cosmetics. The lipstick comprises a polydimethylsiloxane vinyl polydimethylsiloxane cross-linked polymer, two novel modified compounds, namely a silica supported titanium complex pigment anchoring agent and amphiphilic block polyamide microspheres, jojoba oil, caprylic / capric triglyceride, isononyl isononanoate, hydrogenated polydecene, a colorant, namely titanium dioxide iron oxide red iron oxide yellow, and a colorant, namely silica supported titanium complex pigment anchoring agent, amphiphilic block polyamide microspheres, jojoba oil, caprylic / capric triglyceride, isononyl isononanoate and hydrogenated polydecene. The anti-aging agent is prepared from mica, tocopherol, ascorbyl palmitate, butylated hydroxytoluene, vanillin and carnauba wax microcrystalline wax ozokerite. Wherein the silica supported titanium complex pigment anchoring agent is prepared by step-by-step reaction of titanium silicalite, titanate and stearic acid, and the amphiphilic block polyamide microspheres are formed by amidation polycondensation of dimethyl acetone diformate and amino polydimethylsiloxane. The lipstick ingeniously solves the contradiction between the matt makeup effect and the moisturizing and repairing performance, and has the remarkable advantages of being durable in color, comfortable in skin feeling and capable of fading cheilogramma.

The invention relates to the technical field of skin care products, and discloses a whitening active component loaded mesoporous silica nanoparticle whitening essence, which comprises 5-10 parts of a functional mesoporous silica carrier, 2-8 parts of a cosolvent, 10-25 parts of a humectant, 0.1-1 part of a stabilizer, 0.1-0.5 part of a pH regulator, and 70-82 parts of water. The oil-soluble phenylethyl resorcinol / butyl resorcinol and the water-soluble alpha-arbutin are efficiently loaded through the high specific surface area and the controllable aperture structure of the functional mesoporous silica carrier, so that stable coexistence and synergistic effect of double whitening components are realized; vitamin E, ascorbyl palmitate, glutathione, amphiphilic calcium peptide and other components form a synergistic protection system, skin photoaging is delayed, skin endogenous collagen and elastic fiber regeneration is promoted, in addition, sodium hyaluronate, sodium polyglutamate and other moisturizing components can strongly lock water, and moisturizing is achieved.

A rotigotine-containing patch comprising a support layer and an adhesive layer, wherein the adhesive layer contains at least one selected from the group consisting of rotigotine and pharmaceutically acceptable salts of rotigotine, a rubber-based adhesive base, and an antioxidant, wherein the antioxidant comprises propyl gallate, ascorbyl palmitate, and sodium pyrosulfite.

The application relates to a method for detecting trace sulfur dioxide in food. The application aims to develop a method for enriching distillated sulfur dioxide in food, removing interference background color in a sample to be detected, amplifying a signal to be detected, and realizing detection of trace sulfur dioxide in food to be detected. The main technical scheme of the application is as follows: the food to be detected is acidized and distilled through water vapor, and the distillate is introduced into an enrichment liquid; after the distillation is completed, the enrichment liquid is rapidly heated, and the released sulfur dioxide gas is concentrated and absorbed by a receiving liquid; the enrichment liquid comprises the following components: 1.0-2.0 mol / L triethyl phosphate, 0.1-0.5 mol / L ascorbic acid palmitate and 0.1-0.5 mol / L Na2HPO4. It is verified that the above method can realize detection of trace sulfur dioxide, the detection limit reaches the ng level, and the method based on spectral characteristics for detecting some colored food is expanded.

This invention discloses a method for detecting the encapsulation efficiency of dexamethasone palmitate injection, belonging to the technical field of encapsulation efficiency detection. The method involves mixing dexamethasone palmitate injection with a solvent for extraction; the dexamethasone palmitate injection comprises a fat emulsion and free dexamethasone palmitate; after extraction, the fat emulsion and free dexamethasone palmitate are separated, and the encapsulation efficiency is calculated by quantitative analysis using HPLC; the polarity of the solvent is similar to that of the dexamethasone palmitate. This invention utilizes the principle of "like dissolves like" to develop a method for determining the encapsulation efficiency of dexamethasone palmitate injection extracted with an organic solvent. This method effectively separates the fat emulsion from the free dexamethasone palmitate while ensuring that the structure of the fat emulsion is not damaged during the measurement process, thus avoiding falsely low encapsulation efficiency due to drug leakage.

The invention relates to a sunscreen composition with strong waterproof performance and application of the sunscreen composition in a sunscreen product. The sunscreen composition with strong waterproof performance is prepared from the following components: polysiloxane 15, dextrin palmitate, trimethylsiloxy silicate, a VP / hexadecene copolymer and a sunflower seed oil unsaponifiable matter. According to the invention, five components including polysiloxane-15, dextrin palmitate, trimethylsiloxy silicate, VP / hexadecene copolymer and sunflower seed oil unsaponifiable matter are creatively combined for use, and the five raw materials cooperate with each other to form an excellent and stable waterproof film-forming system, so that erosion of scenes such as water immersion, sweating and the like can be effectively resisted after use, and the service life of the waterproof film-forming system is prolonged. The waterproof durability is far better than that of an existing waterproof sunscreen product with a single film-forming agent, and the waterproof sunscreen product can still keep good sunscreen and waterproof effects after being soaked in water through tests, and meets the high-strength waterproof requirements for outdoor use, swimming and the like.

The invention particularly relates to a method for detecting trace sulfur dioxide in food. The invention aims to develop a method for enriching distilled sulfur dioxide in food, which can remove interference ground color in a to-be-detected sample, amplify a to-be-detected signal and realize detection of trace sulfur dioxide in the to-be-detected food. According to the main technical scheme, the method comprises the following steps: acidifying food to be detected, distilling through steam, and introducing distillate into enrichment liquid; after the distillation is finished, rapidly heating the enrichment liquid, and intensively absorbing the released sulfur dioxide gas through the receiving liquid; the enrichment liquid is prepared from the following components: 1.0 mol / L to 2.0 mol / L of triethyl phosphate, 0.1 mol / L to 0.5 mol / L of ascorbyl palmitate and 0.1 mol / L to 0.5 mol / L of Na2HPO4. Through verification, the method can realize detection of trace sulfur dioxide, the detection limit reaches ng level, and the method for detecting part of colored food based on spectral characteristics is expanded.