16 results about "Gallate" patented technology

This invention discloses a method for preparing alkyl gallate without a dehydrating agent, belonging to the field of chemical reaction auxiliary technology. By optimizing the raw material ratio of the reaction system, precisely controlling the reaction environment parameters and the condensate separation rate, this invention utilizes the azeotropic properties of alcohol and water to achieve efficient separation of the water generated in the reaction. It can promote the forward esterification reaction without adding any dehydrating agent, achieving the same or even better water separation and reaction promotion effects without the need for a dehydrating agent. This invention eliminates the need for a dehydrating agent, and the synthesized methyl gallate, ethyl gallate, propyl gallate, octyl gallate, and lauryl gallate can reach a maximum content of 99.2%, with a stable product yield of 50-57g. This effectively reduces production costs, avoids the pollution problems caused by dehydrating agents, simplifies the production process, and possesses both green environmental protection and promising prospects for industrial-scale application.

The invention relates to a preparation process of near-infrared fluorescent powder, in particular to nickel-containing near-infrared fluorescent powder and a preparation method thereof, a certain amount of barium carbonate, gallium oxide, nickel oxide and isopropanol are taken to be prepared into turbid liquid, and the nickel-containing barium gallate-based near-infrared fluorescent powder is prepared through the steps of grinding, drying, grinding, pressing, heat treatment, cooling, grinding and the like. Under the excitation of 635 nm light, the fluorescent powder presents ultra-wide band near-infrared luminescence composed of 1050-1400 nm light emission derived from matrix defects and 1300-1800 nm light emission of Ni < 2 + > ions; the light-emitting diode light source is more suitable for compact special near-infrared fluorescent powder conversion light-emitting diode light source design for high-resolution deep biological tissue imaging diagnosis equipment. Similarly, due to no ionizing radiation ultra-wide band NIR-II region emission, the system can be used in various biological tissue situations such as fat, muscle, endothelium and the like, and then development of multipurpose imaging diagnostic analysis technologies and equipment which are suitable for family daily medical treatment and are friendly and safe to special groups such as children, pregnant women, old people and the like can be promoted.

The invention discloses a theaflavin nano-composite with whitening and moisturizing effects, which is mainly prepared from theaflavin as an active component, an encapsulation carrier and a synergistic component, and has a core-shell structure with theaflavin as a core and a three-dimensional network formed by the encapsulation carrier as a shell, the purity of the theaflavin is not lower than 80%, and the mass ratio of the theaflavin-3-gallate to the theaflavin-3 '-gallate is 1: (0.8-1.2); the encapsulation carrier comprises modified silk fibroin, activated tamarind seed polysaccharide and self-assembly oligopeptide with pH responsiveness, and a three-dimensional network is formed through reaction; the synergistic interaction components are 2-o-ethyl ascorbic acid and eugenol. The invention also discloses a preparation method and application of the compound. The theaflavin nano-composite prepared by the invention has the advantages of high stability, good bioavailability, capability of quickly releasing active matters on the surface of skin in a weakly acidic environment, and realization of whitening and moisturizing effects.

A method of enhancing the quality of a skin scar by topical application of an agent for improving scar quality is characterised in that said agent is pre-emptively applied to a potential surgical cutaneous site in advance of surgery, including surgery involving use of lasers. The topical agent may be a polyphenol, such as (-)-epigallocatechin-3-gallate (EGCG). Use of such a topical agent in advance of surgery leads to significant beneficial effects on dermal scarring by reducing mast cells, angiogenesis, skin thickness and simultaneously increasing elastin content. The topical agent may be applied directly or incorporated in a dressing, such as in a dermal patch comprising an adhesive silicone sheet, and can be worn both in the lead up to surgery and post-operatively.

A 3D-printed cervical plug. A 3D-printed cervical plug support is filled with a nanocomposite hydrogel. The nanocomposite hydrogel is a supramolecular nanocomposite formed by self-assembly of (-)-epigallocatechin-3-gallate and metal ions in a hydrogel.

The application discloses an EPA liposome and a preparation method and application thereof, and particularly relates to the technical field of cosmetics. The EPA liposome is prepared through self-assembly of liposomes by using the following raw materials in parts by mass: microalgae oil EPA 1-4 parts, epicatechin-3-gallate 1-2 parts, alpha-tocopherol 0.2-1 part, ginsenoside Rg3 0.02-0.1 part, lipids 2-10 parts, emulsifier 1-10 parts, and water is supplemented to 100 parts. The EPA liposome realizes the stable effect of EPA in a composite system such as a cosmetic skin care product, enhances the in-situ antioxidant and protective functions of EPA and slows down the autoxidation of EPA, improves the bioavailability and enhances the anti-aging effect through the synergy of the contained efficacy substances and the design of the nano-liposome.

This invention relates to the field of scale inhibition technology, and proposes a scale inhibitor for soda ash mother liquor and its preparation method. The scale inhibitor for soda ash mother liquor comprises the following components by weight: 50-75 parts polyacrylic acid, 30-50 parts polyepoxysuccinic acid, 5-12 parts surfactant, 2-16 parts sodium gallate, 1-10 parts sodium lactate, 1-7 parts stabilizer, 0.5-4.5 parts dispersant, and 30-50 parts water. This technical solution solves the problem of low scale inhibition rate in existing soda ash mother liquor scale inhibitors.

The disclosure relates to crystalline Form X of epigallocatetchin-3-gallate, compositions containing Form X, and methods of using Form X. The disclosure also relates to methods of making crystalline Form X of epigallocatetchin-3-gallate.

The gas-liquid separation condensing device comprises a condensing tower, a trigger switch and an electric control liquid discharge pipe, an exhaust pipe is arranged at the upper end of the condensing tower, a refrigerant inlet pipe and a refrigerant outlet pipe are installed at the upper end and the lower end of the side of the condensing tower respectively, a sleeve is arranged on the outer wall of the upper end of the refrigerant outlet pipe, and the refrigerant inlet pipe and the refrigerant outlet pipe are communicated through a pipeline. An air inlet pipe is arranged at the lower end of the side, away from the refrigerant inlet pipe, of the condensing tower, a trigger switch is mounted on the lower surface of the end of the air inlet pipe in the condensing tower, an electric control liquid discharging pipe is arranged on the surface of the condensing tower below the air inlet pipe, and a square rod is fixedly connected to the inner wall of the lower end of the condensing tower on the side of the electric control liquid discharging pipe. The outer wall of the square rod is sleeved with a floating plate, and a positioning pipe is fixedly installed at the upper end of the square rod. According to the gas-liquid separation condensing device for the amyl gallate reaction, condensate is conveniently prevented from being accumulated on the condensing structure, so that the normal work of the device is prevented from being influenced, and the practicability of the device is improved.

This invention discloses gallic acid-based MOF gas-sensitive materials, their preparation methods, and applications. The preparation method of the gallic acid-based MOF gas-sensitive material includes the following steps: dissolving a metal salt and gallic acid in an alkaline solution and reacting them at 110-150°C to obtain the gallic acid-based MOF gas-sensitive material; the metal salt is selected from one or more of the nitrates, sulfates, and hydrochlorides of cobalt, magnesium, and nickel; the molar ratio of the metal salt to gallic acid is 1:(1.5-2.5). This invention uses the gallic acid-based MOF gas-sensitive material to prepare QCM gas sensors, especially QCM-type ammonia sensors. Compared with Mg-Gallate MOF-based and Ni-Gallate MOF-based QCM gas sensors, the Co-Gallate MOF-based QCM gas sensor exhibits superior selectivity and good sensitivity for ammonia.

The invention discloses a reslurrable organic silicon waterproof and oil-proof coating as well as a preparation method and application thereof, and belongs to the technical field of new organic silicon materials. The preparation method comprises the following steps: preparing amino silicon oil by taking methylcyclosiloxane, N-beta-aminoethyl-gamma-aminopropyl methyl dimethoxy silane and tetramethyl amine hydroxide as raw materials; performing epoxidation on the alkyl gallate to prepare alkyl gallate epoxy; the surface of paper is coated with amino silicon oil and alkyl gallate epoxy in a roller coating mode, and the waterproof and oil-proof coating of the paper is prepared through the ring-opening reaction of epoxy and amino. After paper is coated with the waterproof and oil-proof coating, the waterproof and oil-proof coating can be directly used as food packaging paper, the conventional waterproof and oil-proof effect can be achieved, hot water and hot oil contact scenes can be better resisted, the excellent repulping recycling performance is achieved, after the packaging use period is completed, fiber recycling can be achieved through a conventional papermaking repulping process, and the production cost is reduced. Environmental burden caused by difficult degradation and incapability of recycling is avoided, and resource recycling in the packaging industry is facilitated.

The invention relates to liquorice extract microcapsule powder, and relates to the technical field of medicines and foods, and the liquorice extract microcapsule powder is prepared from the following raw materials in parts by mass: 20-30 parts of liquorice extract, 15-25 parts of whey protein, 40-60 parts of taro starch, 5-10 parts of trehalose and 0.5-1.5 parts of a cross-linking agent. The whey protein is subjected to modification treatment by using epigallocatechin-3-gallate, so that the modified whey protein is obtained. According to the invention, by enhancing the compactness and interface stability of the wall material, the encapsulation effect of the active components is effectively improved, and the licorice extract microcapsule powder has good storage stability.

The application belongs to the technical field of biology, and discloses application of gallic acid derivatives in preparation of products for treating or preventing liver diseases, wherein the gallic acid derivatives are one or more combinations of 2-Phenylethyl 1-O-beta-D-(6'-O-galloyl)-glucopyranoside, 2,3-digalloyl-D-glucopyranose, Kaempferol 3-O-glucoside-2"-gallate and Quercetin 3-O-(6'-O-Galloyl)-beta-galactoside; the four gallic acid derivatives can better reduce AST and ALT activities in alcohol-induced HepG2 cells relative to a model group, and 2,3-digalloyl-D-glucopyranose and Quercetin 3-O-(6'-O-Galloyl)-beta-galactoside have better effects than gallic acid and positive drug Silybin (Silybin).

The invention belongs to the technical field of biomedicine, and discloses mucus excitation hydrogel with regeneration activity and a preparation method thereof, the mucus excitation hydrogel is composed of dihydrocaffeic acid modified boloxamide, hyaluronic acid, epigallocatechin-3-gallate and bioactive factors, and the bioactive factors are KPV tripeptide and epidermal growth factors. The PHE-EK is a flowable liquid at room temperature and is gelled within 10 seconds at the body temperature. And the strain of the PHE-EK hydrogel is 77.8%. The PHE-EK hydrogel specifically adheres to the inflammatory colon through electrostatic interaction. The PHE-EK solution provided by the invention has good temperature sensitivity. The PHE hydrogel has relatively high mechanical strength and relatively high fracture strain. The PHE hydrogel can specifically adhere to the inflammatory colon by electrostatic interaction. PHE-EK enema is a promising method for treating ulcerative colitis.

Provided herein are compositions, methods, systems and / or kits for preventing and / or treating neoplasms using at least one modulator selected from quercetin, sodium phenyl butyrate and epigallocatechin-3-gallate in combination with one or more anti-cancer agents. The compositions, methods, systems and / or kits are used to prevent and / or treat neoplasms that are resistant to the one or more anti-cancer agents when administered alone. Also provided are nanoformulations based on nanoparticles with one or more anti-cancer agents and / or one or more modulators for preventing and / or treating neoplasms.