70 results about "Gallocatechin" patented technology

The invention discloses marker screening identification and application of non-concentrated reduced apple juice based on non-targeted metabonomics, and relates to the technical field of fruit juice identification. The invention discloses a marker for identifying non-concentrated reduced apple juice. The marker is selected from the following molecules: gallocatechin, catechin, taxifolin, p-hydroxybenzaldehyde, 5-methoxysalicylic acid, azelaic acid, caffeic acid, chlorogenic acid, epicatechin, eriodictyol, ferulic acid, isoquercetin, naringenin, fructosyl isoleucine, p-coumalaldehyde, p-coumaricacid, phloretin, phlorizin, procyanidine B1, quercetin-3-O-galactoside and rutin. The marker can be used for identifying non-concentrated reduced apple juice and concentrated reduced apple juice, andhas high accuracy.

The present invention discloses anti-influenza virus nasal mucosa absorbent and a preparation method thereof, in the invention, epi-gallocatechin-3-O-gallate (EGCG) or epicatechin-3-O-gallate (ECG) solid preparation is used as efficacy component and acetic acid-sodium acetate buffer solution is used as solvent. The EGCG or the ECG solid preparation is dissolved into the acetic acid-sodium acetate buffer solution. The concentration of the nasal mucosa absorbent is 6 to 7mg / ml. The EGCG and ECG are considered as anti-influenza virus efficacy component to be made into solid and liquid to be packed separately and are mixed and dissolved for using, which effectively solves the problem that the EGCG and the ECG are not stable in the solution with short shelf life and prolongs the usage period of the EGCG and the ECG preparation. The nasal mucosa absorbent of the present invention acts on the influenza virus directly with fast absorption speed and can effectively inhibit the influenza virus.

The invention relates to an aqueous zinc ion battery electrolyte. The electrolyte is composed of a matrix electrolyte and a high-adhesion organic matter containing a catechol functional group, the high-adhesion organic matter containing the catechol functional group is one of catechol, [alpha]-methyldopa, [alpha]-methyldopamine, noradrenaline, gallic acid, gallocatechin, 6-hydroxydopamine, dihydroxyphenylacetamide, dihydroxyphenylethyl thiourea, dihydroxyindoline, dihydroxytryptamine, trihydroxyindole, catechin and tannic acid. The preparation method comprises the following steps: dissolving one of zinc sulfate, zinc chloride and zinc trifluoromethanesulfonate in deionized water, and stirring and dissolving at normal temperature to prepare a matrix electrolyte; d anadding the organic matter into the matrix electrolyte to prepare the electrolyte. The electrolyte can form a stable mussel bionic solid electrolyte interface film on the surface of a zinc negative electrode in situ, dendrite-free deposition of zinc is induced, the cycle performance and coulombic efficiency of the zinc negative electrode are improved, and the electrochemical performance of a zinc ion battery is improved.

The present invention provides synthetic processes for preparing racemic and / or optically pure epicatechin, epigallocatechin and related polyphenols as such or as their variously functionalized derivatives. A principle objective of the disclosure is to provide a new and useful method of synthesis to obtain polyphenols in isomerically pure and / or racemic forms.

The invention discloses an organic-inorganic hybrid antibacterial nanomaterial, and a preparation method and a use thereof. The antibacterial material is a core-shell structure, wherein the core is aninorganic antibacterial material, and the shell is an organic antibacterial material; the inorganic antibacterial material is one or more of Ag2O, TiO2, ZnO, CaO, MgO, CuO and Cu2O; the organic antibacterial material is a polymerization product of a polyphenol compound and a polyamine compound, and the polyphenol compound is one or more of dopamine, tannic acid, gallocatechin, catechin and catechol; and the polyamine compound is one or more of polyethylene polyamine compound. The organic-inorganic hybrid antibacterial nanomaterial has the advantages of excellent synergistic antibacterial property, good dispersibility, good interfacial properties, and facilitation of uniform dispersion of the material in a polymer material. The preparation method of the invention has the advantages of simplicity, greenness, environmental protection, and low price and low toxicity of cuprous oxide nanoparticles.