39 results about "Hydrolysable tannin" patented technology

The invention provides a composition comprising a matrix of chitosan and a tannin wherein the chitosan is electrostatically bonded to the tannin to form a chitosan-tannin composite material. The chitosan can be partially or fully deacetylated, and the tannin can be a monomeric or an oligomeric proanthocyanidin or a hydrolysable tannin. The chitosan-tannin composite material can be a nanoparticle, a hydrogel film, a bio-foam, or a biogel, or the chitosan-tannin composite material can coat a liposome. The composite materials can be used for drug delivery, for antibacterial and / or antifungal applications, for tissue engineering applications, for wound healing applications, or they can be used as adjuvants for vaccination, including oral vaccinations. The invention also provides methods of preparing the composite materials and their various forms.

The invention provides a novel hydrolytic tannin of the pyran glucose category containing the coffee acyl. The chemical structure is as shown in formula (1); the compound of the invention can inhibitthe proliferation of tumor; the compound has the better anti-tumor activity and can be used to prepare the anti-tumor drugs.

A method for extracting polyphenol substances from semen juglandis with inner seed coats by the aid of combined enzyme and ultrasonic treatment. The method comprises: obtaining semen juglandis with seed coats; feeding the semen juglandis with inner seed coats into an ethanol aqueous solution according to a volume ratio of 1:3-1:15, regulating the pH of the mixture by the aid of food-grade citric acid or hydrochloric acid until the pH of the mixture is 3.5-6.5, and then adding pectinase and / or a cellulase compound to obtain a polyphenol extracted system. According to the semen juglandis polyphenol crude extract prepared by the method, the total weight of dry substances, which are obtained after freeze drying, at least accounts for 2% of the weight of the original semen juglandis with the coats, and the contents of polyphenol effective substances in the semen juglandis polyphenol crude extract can reach 15% at least; the semen juglandis polyphenol crude extract further can be separated by the aid of macroporous adsorption resin and industrial chromatographs, and accordingly products such as ellagic acid, hydrolysable tannin, and juglone can be prepared.

The invention provide a sanguisorba extract for treatment of AIDS (acquired immunodeficiency syndrome) and a preparation method thereof, and the sanguisorba extract mainly comprises gallic acid, ellagic acid, hydrolysable tannin and condensed tannin. The sanguisorba extract has excellent inhibitory activity and low cytotoxicity to R5-tropic and X4-tropic AIDS viruses.

Provided is a method for cultivating lignicolous lucid ganoderma with walnut shells as a culture medium. The walnut shells are smashed, the walnut shells are placed in warm water for soaking, after soaking, soaking liquid is removed, and hydrolysable tannin is removed preliminarily; soybeans and water are subjected to soaking together, continuous soaking is carried out at the temperature of 20 DEG C-28 DEG C for 10 h-12 h, smashing is carried out, and soybean milk is formed; and after being soaked in the soybean milk and the water, the walnut shells are subjected to full stirring and combining, even mixing is carried out, sealing is carried out at the temperature of 10 DEG C-15 DEG C for 90 h-98 h, the processed walnut shells are placed at an oven, drying is carried out, the walnut shells, cotton seed hulls, rice bran, glucose and calcium phosphate after processing are subjected to rewatering, full stirring and even bagging, after bagging, sterilization is carried out, the walnut shells are cooled to room temperature, ganoderma lucidum strains are inoculated, breeding is carried out in an incubator of 23 DEG C-28 DEG C, and the mycelial growth conditions are observed at regular intervals until lucid ganoderma buds are formed. A semisolid low-temperature fermentation technology is used for damaging the bacteriostasis of tannin, growth of lignicolous lucid ganoderma is promoted, and hydrolysable tannin is effectively lowered.

The invention discloses a compound adsorbing material capable of selectively adsorbing tannins and a preparation method thereof. The method comprises the following steps of: firstly, ultrasonically stirring and co-processing an attapulgite suspension with mass fraction of 1% to 15% in a water bath, freezing and thawing so that attapulgite crystal bundles are dissociated into attapulgite single crystal rods, and drying and grinding to obtain attapulgite nanopowders; then, modifying a suspension of the attapulgite nanopowders with a cationic surfactant to form organic attapulgite; and subsequently, mixing hide powder collagen and a suspension of the organic attapulgite, oscillating in a water bath from mixing thoroughly, and freeze-drying to constant weight, thus obtaining the compound adsorbing material. The material can selectively adsorb hydrolysable tannins with high efficiency. Since both the collagen and the attapulgite are environment-friendly, the collagen-attapulgite compound material has the advantages of environmental friendliness and has development potential.

The invention discloses a hydrolysable tannin compound, which is formed by connecting glucose and gallic acid by ester bond or glycosidic bond. According to the number of composing sugar, the compound falls into monomer, dimer and trimer hydrolysable tannin derivatives, the hydrolysable tannin compound is characterized in that the end group of soup is free hydroxyl group. Animal experiments prove that the hydrolysable tannin compound can inhibit croton oil induced mouse ear swelling and carrageenin induced mouse foot swelling, has obvious inhibitory activity on type II collagen induced DBA-1 type mouse arthritis, and can be used for prevention and / or treatment of rheumatism and rheumatoid arthritis.