1545 results about "Gallic acid ester" patented technology

Disclosed herein is a lubricating oil for bearings comprising

(a) a diester represented by General Formula (1)

wherein R¹ and R² are the same or different, and each represents a C₃-C₁₇ linear alkyl group; A represents a C₂-C₁₀ linear alkylene group or A represents a branched alkylene group consisting of a linear alkylene group, the linear alkylene group being the principal chain, and one or more alkyl groups (branches) bonded to the linear alkylene group, wherein the total number of carbon atoms of the linear alkylene group and the one or more alkyl groups is 3 to 10; with the proviso that when A is a branched alkylene group and has two or more alkyl groups, the two or more alkyl groups are not bonded to the same carbon atom; or a mixture of the diester with an additional base oil and

(b) at least one member selected from the group consisting of phenol-based antioxidants and amine-based antioxidants, and optionally containing (c) at least one member selected from the group consisting of phosphorus-based compounds and aliphatic linear monocarboxylic acids, and further optionally containing (d) at least one member selected from the group consisting of benzotriazole-based compounds and gallic acid-based compounds.

A method of inhibiting light-induced degradation of nucleic acids includes irradiating a portion of the nucleic acids in the presence of a detection solution comprising a polyphenolic compound. A method of detecting a nucleic acid having a fluorescent tag includes irradiating at least a portion of the nucleic acid with light of a suitable wavelength to induce a fluorescence emission and detecting the fluorescence emission. Optionally, the polyphenolic compound is gallic acid, a lower alkyl ester thereof, or mixtures thereof. A kit includes one or more nucleotides, an enzyme capable of catalyzing incorporation of the nucleotides into a nucleic acid strand and a polyphenolic compound suitable for preparing a detection solution.

The invention discloses preparation and application of magnetic nano-composite material gamma-Fe2O3/PDA (Polydopamine)-GA (Gallic Acid). The preparation comprises the following steps of carrying out a hydrothermal reaction and calcinations to obtain a gamma-Fe2O3 nano particle carrier by taking FeCl3.6H2O with low price as an iron source, ethylene glycol (EG) as a reducing agent, polyvinylpyrrolidone (PVP) as a dispersing agent and a protective agent, and natrium aceticum (NaAc) as an alkali source; then wrapping a layer of polydopamine (PDA) in a buffer solution of tris (hydroxymethyl) aminomethane-hydrochloric acid (Tris-HCl) with pH of 8.5; and finally introducing gallic acid (GA) to an ethanol system by using 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and n-hydroxysuccinimide as cross-linking agents, wherein a specific synthetic schematic diagram is seen in attached drawing 1. Then the adsorption effects of the synthesized magnetic nano-particle on metal ions Cu<2+> and Pb<2+> are discussed, the detection effects of a glassy carbon electrode modified by the magnetic nano-particle on the metal ions Cu<2+> and Pb<2+> are researched. Results show that gamma-Fe2O3/PDA-GA has excellent detection and adsorption effects on heavy metal ions in a water environment.

A method of making a facile, surface-independent, polyphenol coating is disclosed. In general, the method includes contacting at least a portion of the substrate to be coated with an aqueous solution containing one or more salts and one or more nitrogen-free phenolic compounds. Substrates of all kinds may be used, and compounds used to make the coating may include epigallocatechin-3-gallate (EGCG), epigallocatechin (EGC) and epicatechin-3-gallate (ECG), tannic acid, gallic acid, pyrogallol, and/or other nitrogen-free phenolic compounds. The coating made using the method, methods of using the coating, and kits comprising the coating precursors are also disclosed.

A cleaning solution is provided for cleaning copper-containing microelectronic substrates, particularly for post etch, post-CMP or Via formation cleaning. The cleaning solution comprises a quaternary ammonium hydroxide, an organic amine, a corrosion inhibitor, and water. A preferred cleaning solution comprises tetramethylammonium hydroxide, monoethanolamine, gallic acid, and water. The pH of cleaning solution is greater than 10.

The invention relates to a plant active component composition with slow anti-allergic action. The plant active component composition is mainly prepared from natural plant active components: 0.1-5wt% of glycyrrhetinic acid, 0.05-1wt% of apigenin, 0.05-1% of table gallic catechin gallic acid ester, 0.1-3wt% of asiaticoside, 0.1-5wt% of baicalin and 0.1-10wt% of fucus serratus extract. The composition is used for preparing cosmetics or personal care products with a plurality of effects of resisting skin allergy, diminishing inflammation, relieving itching, resisting oxidation, moisturizing and the like. The composition is safe and free of toxic and side effects, and can be compounded with a plurality of components, sensitive skin and dry skin are effectively improved, and the barrier function of the skin is reinforced.

The present invention provides a method for the preparation of a myceliated cacao bean or other agricultural product. This method includes providing cacao beans or other agricultural substrate, optionally hydrating the cacao beans or other agricultural product, and optionally pasteurizing or sterilizing the cacao beans or other agricultural substrate to provide prepared cacao beans or other agricultural substrate, and a step of inoculating the prepared cacao beans or other agricultural substrate with a prepared fungal component and culturing the inoculated cacao beans or other agricultural substrate to prepare the myceliated product. The methods of the instant invention result in prepared cacao beans or other agricultural substrate having reduced levels of undesirable taste components, such as theobromine, catechin, epicatechin, gallic acid equivalents, and/or 2-methoxy-3-isopropylpyrazine, and increased levels of myceliation products, such as fungal β-glucans, chitin, proteins, glycoproteins, pyrazines and polysaccharides, relative to starting cacao beans or other agricultural substrate.

This invention relates to a chelated calcium fertilizer, which is prepared from: catalyst 1-2 wt. %, inorganic calcium raw material 58-69 wt. %, and chelating agent 30-40 wt. %. The chelating agent is composed of: oxalic acid 5-10 wt.%, malic acid 8-20 wt.%, citric acid 15-25 wt.%, maleic acid 10-25 wt.%, sorbitol 3-8 wt.%, gallic acid 8-10 wt.%, and lactic acid 2-8 wt.%. The catalyst is composed of: gadolinium chloride 0.1-0.35 wt.%, selenium dioxide 0.1-0.2 wt.%, chalcanthite 0.05-0.1 wt.%, KOH 0.05-0.1 wt.%, potash 0.1-0.2 wt.%, and palladium carbonate 0.05-0.2 wt.%. The chelating agent has appropriate stability and low cost, and can chelate with calcium in solid state. Besides, the chelating agent cannot be deactivated in plants by hydrolysis or reacting with phosphate, sulfate and oxalic acid. This invention also relates to a method for preparing the chelated calcium fertilizer, which specifies the production process, process parameters, and chelating agent and high-efficiency catalyst needed.

The invention provides a preparation method of graphene. The preparation method includes the steps of firstly, preparing graphene oxide; secondly, using a silane coupling agent to modify the graphene oxide; thirdly, adding an initiator in the presence of the modified graphene oxide obtained in the second step, and copolymerizing N-vinyl pyrrolidone and polyethylene glycol monoallyl ether to obtain silane coupling agent modified graphene oxide dispersing liquid using copolymer as the dispersing agent; fourthly, adding gallic acid and tannic acid into the modified graphene oxide dispersing liquid obtained in the third step to perform reduction reaction so as to obtain the end-product graphene. The prepared graphene is promising in bio-application prospect and capable of forming stable and high-concentration dispersing liquid.

A UGT2B inhibitor capable of increasing the bio-availability of a drug, is a compound in a free base or a pharmaceutically acceptable salt form that is selected from the group consisting of: capillarisin, isorhamnetin, β-naphthoflavone, α-naphthoflavone, hesperetin, terpineol, (+)-limonene, β-myrcene, swertiamarin, eriodictyol, cineole, apigenin, baicalin, ursolic acid, isovitexin, lauryl alcohol, puerarin, trans-cinnamaldehyde, 3-phenylpropyl acetate, isoliquritigenin, paeoniflorin, gallic acid, genistein, glycyrrhizin, protocatechuic acid, ethyl myristate, umbelliferone, PEG (Polyethylene glycol) 400, PEG 2000, PEG 4000, Tween 20, Tween 60, Tween 80, BRIJ® 58, BRIJ® 76, Pluronic® F68, Pluronic® F127, and a combination thereof. A UGT2B enhancer capable of enhancing a clearance rate of morphine-like analgesic agents, is a compound in a free base or a pharmaceutically acceptable salt form that is selected from the group consisting of: nordihydroguaiaretic acid, wogonin, trans-cinnamic acid, baicalein, quercetin, daidzein, oleanolic acid, homoorientin, hesperetin, narigin, neohesperidin, (+)-epicatechin, hesperidin, liquiritin, eriodictyol, formononetin, quercitrin, genkwanin, kaempferol, isoquercitrin, (+)-catechin, naringenin, daidzin, (−)-epicatechin, luteolin-7-glucoside, ergosterol, rutin, luteolin, ethyl myristate, apigenin, 3-phenylpropyl acetate, umbelliferone, glycyrrhizin, protocatechuic acid, poncirin, isovitexin, 6-gingerol, cineole, genistein, trans-cinnamaldehyde, and a combination thereof.

A method and composition for preventing and treating Avian Influenza in Humans utilizes an effective quantity of polyphenolic(s) and/or its derivatives in combination with a carrier. The anti-avian influenza ingredient having a composition selected from the group consisting of theaflavin, theaflavin-3,3′-digallate, theaflavin-3-monogallate, theaflavin-3 gallate, theaflavin-3′-gallate, thearubigin, gallic acid, tannic acid, (−)-epigallocatechin gallate (EGCG), (−) epigalloatechin (EGC), (+)-epicatechin (EC), (−)-gallocatechin gallate (GCG), and catechin.

The invention relates to a preparation method and application of a fresh-cut fruit and vegetable antistaling agent, and belongs to the technical field of fruit and vegetable fresh-keeping storage techniques. The preparation method comprises the following steps: (1) adding chitosan into a buffer solution, wherein the concentration of chitosan in the obtained mixed solution is 5-15g/L; and (2) adding gallic acid and an enzymic preparation respectively into the mixed solution, wherein the concentration of gallic acid is 15-50g/L, and the concentration of the enzymic preparation is 2-10U/Ml; and stirring at room temperature for 4-8 hours so as to obtain a chitosan gallic acid derivative, and freezing and drying so as to obtain the fresh-cut fruit and vegetable antistaling agent. The fresh-cut fruit and vegetable antistaling agent is safe, effective and low in cost, can effectively inhibit the growth of free radicals and microorganisms in fresh-cut fruit and vegetable bodies, and can prolong the shelf life of the fresh-cut fruit and vegetables, thereby remedying defects of the prior art.

The present invention provides a safe and highly effective antibacterial composition without impairing the flavor of foods or drinks, which composition is used in products such as foods and oral care goods which are mainly to be taken into human or animal bodies or mainly to be used in the oral cavity.

The composition according to the present invention contains gallocatechin gallate as an agent for enhancing the activity of antibacterial catechins in which the antibacterial activity of the antibacterial catechins against Streptococcus mutans is particularly enhanced. The composition according to the present invention can be produced by mixing the antibacterial catechins with gallocatechin gallate. Alternatively, it can be produced as a composition comprising a synthetic adsorbent-adsorbed fraction as the main component, which is obtained by subjecting a solvent-extract from tea leaves to an adsorption treatment with the use of a synthetic adsorbent selected from among aromatic compound-based synthetic adsorbents and methacrylic compound-based synthetic adsorbents.

The invention relates to a method for purifying and recycling the waste water produced in the production of gallic acid, wherein, the waste water is produced during the hydrolyzation or refining process of the production of the gallic acid with nutgall or tala as the raw materials. The concrete process is as follows: the waste water is neutralized with 30 percent NaOH to a PH value between 4.5 and 5 and then is vaporized condensed in vacuum, centrifugated to reclaim salt, cooled to between 10 DEG C and 15 DEG C to precipitate gallic acid crystals, and centrifugally filtered to removel gallic acid crystals and obtain gallic acid; the filtrate is neutralized to the neutralization by adding into milk of lime, after the clarification, the clear liquid is decolored by coal-based activated carbon, then the waste water is subject to biochemical treatment by a biochemical pool to reach the drainage standard. The recycling of the gallic acid can be used to produce products such as pyrogallic acid, gallate and so on, the reclaimed salt can be taken as whitening agent, the boiler softened water and the lime can be used to produce bricks; the invention has less investment, simple process, low cost and good waste water treatment effect.

The invention discloses a method for separating ethylene and acetylene from a mixed gas. The method comprises the step of using a metal organic frame material as an adsorbent for separating the ethylene and the acetylene from the mixed gas containing the ethylene and the acetylene; the metal organic frame material has a structural formula of M(C7O5H4).2H2O, wherein M is a metal ion, and the metalorganic frame material is a three-dimensional network structure formed by coordination bonds or intermolecular forces from a transition metal ion or alkaline earth metal ion and gallic acid. The metalorganic frame material has a large adsorption capacity for the acetylene and an excellent selectivity for adsorption and separation of ethylene/acetylene. The materials for the synthesis of the material is cheap and easy to obtain, the material preparation process is simple, and the cost is low; and the material has good regeneration and repetition performance, can still maintain the original adsorption effect after vacuum or heating regeneration, and has broad industrial application prospects.

The invention relates to a floatation depressant for obtaining molybdenum concentrate and copper concentrate by mineral separation, particularly by separation of copper-molybdenum mixed concentrate, and methods for preparing and using the floatation depressant. The floatation depressant is characterized by being an organic liquid agent obtained through chemical reaction by using mercaptoacetic acid, gallic acid and sodium hydroxide as raw materials. The floatation depressant is the organic liquid agent obtained through the chemical reaction of pyrogallic acid, the mercaptoacetic acid and the sodium hydroxide, and can be used for effectively depressing primary and secondary copper sulfide ores such as copper pyrite and chalcocite, and the copper-molybdenum mixed concentrate can be effectively separated. The defects of large usage of common sodium sulfide, severe operation environment and serious pollution are overcome, and the floatation depressant has the advantages of convenience in addition, safety in use and the like. An effective method which is small in agent usage, convenient to use and low in environmental pollution is provided for the separation of molybdenum copper sulfide mixed concentrate.

A residue remover for removing polymeric material and etch residue includes 2-(2-aminoethylamino)-ethanol and optionally another two-carbon atom linkage alkanolamine compound, gallic acid or catechol, water, a polar organic solvent, and hydroxylamine. A process for removing photoresist or other residue from a substrate, such as an integrated circuit semiconductor wafer including titanium metallurgy, includes the steps of contacting the substrate with the above composition for a time and at a temperature sufficient to remove the photoresist or other residue from the substrate. Use of 2-(2-aminoethylamino)-ethanol in the composition and process provides superior residue removal without attacking titanium or other metallurgy on the substrate. The composition preferably has a flash point greater than about 130° C.

Provided are packaged, tea-based beverages, which stably contain catechins at high concentration, are free of any salty taste, and have the inherent flavor and taste of tea. They contain the following ingredients (A) and (B): (A) from 320 mg/500 mL to 1,300 mg/500 mL of non-polymer catechins, and (B) water, wherein: (C) the content of non-epicatechins in the non-polymer catechins is from 40 to 80 wt. %, (D) the content of gallates in the non-polymer catechins is from 35 to 100 wt. %, (E) the weight ratio of the non-polymer catechins to sodium ions is from 12 to 16, and (F) the pH is from 5 to 7.

The invention discloses a metal organic frame material for separating ethane and ethylene and a separation method of the ethylene and the ethane .The metal organic frame material has the advantages ofgood stability, high adsorption capacity, good adsorption and separation selectivity, simple preparation method and low preparation cost. The general structural formula of the metal organic frame material is M(C7O5H4).2H2O, wherein M is a metal ion, and the structure of the metal organic frame material is a three-dimensional network structure formed from a transition metal ion or an alkaline earth metal ion and gallic acid through coordinate bonds or intermolecular forces. A preparation method is as follows: (1) an inorganic salt, the gallic acid, an alkali, and deionized water are mixed according to a ratio, stirred and dissolved, and then put into a reaction kettle for hydrothermal reaction; the inorganic salt is a chloride salt, a nitrate salt, an acetate, a carbonate, a sulphate or aperchlorate of the metal ion; and (2) after the end of the hydrothermal reaction, the deionized water and absolute ethanol are in turn used for washing, and vacuum drying is performed. The metal-organic frame material is used as an adsorbent to perform adsorption separation of a mixed gas containing the ethylene and the ethane.

The invention discloses an epoxy resin based on gallic acids with a structure shown as the formula I, which has high epoxy values and also has higher crosslinking density after being cured, thus having good mechanical property and thermal property. The invention also discloses a preparation method of the epoxy resin based on the gallic acids, comprising the following steps: mixing the gallic acids, epoxy halogenopropane and a catalyst and reacting for 2-5 hours at the temperature of 100-120 DEG C; cooling to 20-40 DEG C; adding alkaline compounds and water and continuing to react for 2-5 hours; and washing, removing a solvent and drying to obtain the epoxy resin based on the gallic acids. The preparation method is simple in process, good in controllability and easy to implement industrially. The invention also provides an application of the epoxy resin based on the gallic acids. The epoxy resin based on the gallic acids is particularly applied to preparing composite materials, epoxy adhesives and coatings.

The invention discloses a method by which the gallic acid in high-temperature liquid water medium is non-catalystically decarboxylated to prepare pyrogallic acid. The method includes three steps; firstly, deionized water and gallic acid are added into a high-pressure reaction kettle, the mass ratio between the deionized water and the gallic acid is 2 : 1 to 6 : 1, stiring is started, temperature under the normal pressure is raised until boiling, and an exhaust valve is opened for two to five minutes; secondly, the exhaust valve is closed, the temperature is continuously raised to 180 DEG C to 250 DEG C, and reaction lasts half to four hours; thirdly, after being cooled down until room temperature, a reaction product is extracted by organic solvent, crude pyrogallic acid is produced after the organic solvent is evaporated from extract, and after the crude pyrogallic acid resolved in deionized water is decoloured, recrystallized and undergoes vacuum drying, the pyrogallic acid product is produced. The invention has the advantages of simple reaction process, high utilization ratio of materials, high product yield, environment-friendly production procedure and high quality of pyrogallic acid product, and as a result, the invention resolves the major problem that the current preparation of pyrogallic acid by catalyzing acid and alkali pollutes envrionment.

The invention provides a preparation method and use of a polygonum capitatum extract. The preparation method comprises the following steps of: extracting polygonum capitatum by using water or an aqueous alcohol system, recovering ethanol and making the extracting solution pass through a macroporous absorption resin; eluting by using water or eluting by using water and low-concentration alcohol, and eluting by using high-concentration alcohol; and collecting eluant, recovering a solvent under reduced pressure, and drying to prepare the polygonum capitatum extract, wherein the content of general flavone is no less than 8 percent and the content of gallic acid is no less than 2 percent. The extract has effects of clearing away heat and reducing fire and promoting diuresis for stranguria, mainly treats pyretic stranguria, and is used for treating urinary system infection and inflammation and other diseases.

The present invention discloses an extraction method of sweet tea active ingredients, the steps are as follows: 1) sweet tea leaves are placed into the water and the complex enzyme is used for enzyme hydrolysis; 2) the enzymatic inactivation and filtration are carried out for the obtained enzymatic hydrolysate to get the filtrate; 3) the separation is carried out for filtrate to get the ellagitannin and the separation liquid; 4) the absorption and separation are carried out for the separation liquid by using the anion exchange resin, then the anion exchange resin is eluted and the solvent used for elution is recovered and dried to get the gallic acid; 5) the liquid is flowed out after the absorption and separation of the separation liquid by the anion exchange resin, the liquid is treated with absorption and separation by macroporous absorption , then the macroporous absorption resin eluted, the solvent used for elution is recovered and dried to get the rubusoside. The extraction method of sweet tea active ingredients of the present invention can separate the ellagitannin, gallic acid, rubusoside and other active ingredients in the sweet tea leaves sequentially. The extraction method has simple operation and can lower the energy consumption, improve the comprehensive utilization rate of the sweet tea and provide the raw materials and intermediates for the health care drugs.