176 results about "Quinic acid" patented technology

A bioengineered synthesis scheme for the production of quinic acid from a carbon source is provided. Methods of producing quinic acid from a carbon source based on the synthesis scheme as well as conversion of quinic acid to hydroquinone are also provided.

The invention relates to artichoke leaf extracts (Cynarae folium) that are characterized by defined absolute percentages and relative inherent percentages of typical constituents of artichoke leaves such as caffeoyl quinic acids and flavonoids The activity spectrum of the inventive leaf extracts is substantially different from known artichoke leaf extracts, said inventive leaf extracts also being different from each other. The invention also relates to methods for producing the extracts and to fields of application thereof.

A packaged beverage of pH 2 to 6 with a green tea extract mixed therein, comprising the following ingredients (A) to (E) (A) from 0.01 to 1.0 wt % of non-polymer catechins, (B) quinic acid or a salt thereof, (C) from 0.0001 to 15 wt % of a sweetener, (D) from 0.001 to 0.5 wt % of sodium ions, and (E) from 0.001 to 0.2 wt % of potassium ions, wherein a content weight ratio [(B)/(A)] of said quinic acid or salt thereof (B) to said non-polymer catechins (A) is from 0.0001 to 0.5. The packaged beverage contains catechins at high concentration, is reduced in bitterness and astringency and is suited for long-term drinking, is excellent in the stability of bitterness and astringency and also in the feeling when it is swallowed, and further, remains stable in color tone even when filled in a clear container and stored at high temperatures.

The invention provides methods for treating auditory impairments in a subject in need of treatment comprising administering to said subject an effective amount of a composition comprising, as an active agent, one or more of a carboxy alkyl ester, a quinic acid derivative, a caffeic acid derivative, a ferulic acid derivative, or a quinic acid lactone or derivative thereof or pharmaceutically acceptable salt thereof and an acceptable carrier or excipient, so as to treat auditory impairments in the subject.

A taste improver which is capable of effectively suppressing unpleasant bitter taste, harsh taste, and astringent taste peculiar to high intensity sweeteners without changing original flavor and taste of food and of reproducing taste intensity and a flavor profile by using the high intensity sweeteners, which are equal to those attained by using sugars such as sucrose.

It is possible to improve the unpleasant aftertastes of a high intensity sweetener and to reproduce taste intensity and a flavor profile which are equal to those attained by using sugars such as sucrose by adding the taste improver for high intensity sweetener, characterized by containing (A), (B), and (C), and further (D) and/or (E), to a beverage or food containing the high intensity sweetener:

• • (A) spilanthol, or an extract or essential oil of a plant containing spilanthol;
  • (B) quinic acid or a composition containing quinic acid;
  • (C) vanilla polyphenol or a composition containing vanilla polyphenol;
  • (D) green tea polyphenol or a composition containing green tea polyphenol; and
  • (E) rosaceous plant polyphenol or a composition containing rosaceous plant polyphenol.

Provided is a beverage having a concentrated or purified tea extract incorporated therein and containing the following ingredients (A) and (B): (A) non-polymer catechins from 0.092 to 0.5 wt. %, (B) quinic acid at a weight ratio of [(B)/(A)] falling within a range of from 0.01 to 0.1. The beverage of the present invention is suited for daily drinking, because it does not generate an uncomfortable aftertaste which will otherwise remain after bitterness or astringency peculiar to catechins is alleviated by a sweetener or the like.

The present invention provides a grease composition or a lubricating oil composition which is capable of effectively preventing hydrogen brittleness-caused peeling from occurring on a rolling surface of a rolling bearing, is excellent in durability in a high temperature and speed operation, and can be used for a long time. A grease-packed bearing (1) has an inner ring (2), an outer ring (3), and a plurality of rolling elements (4). A sealing member (6) for sealing a grease composition (7) is provided at openings (8a) and (8b) disposed at both axial ends of the inner ring (2) and the outer ring (3). The grease composition (7) includes a base grease composed of a base oil and a thickener and an additive added to the base grease. The additive contains at least one compound selected from among plant-derived polyphenolic compounds and compounds formed by decomposition thereof. The above-described compounds include tannin, gallic acid, ellagic acid, chlorogenic acid, caffeic acid, curcumin, quercetin, and quinic acid.

The invention relates to a method for producing dark green tea from stevia rebaudiana as a raw material. The method comprises the following steps of: selecting stevia rebaudiana tender shoots or fresh leaves or dried leaves as the raw material; after bacterial inoculation, performing pile fermentation at the temperature ranging from 15 to 35 DEG C for 1-10 d; performing roasting drying after the pile fermentation; and pressing to obtain the stevia rebaudiana dark green tea product. The stevia rebaudiana dark green tea obtained by the method provided by the invention has the effects of reducing blood pressure, resisting diabetes, resisting virus and the like as the stevia rebaudiana leaves contain bioactive substances such as stevioside, caffeoyl quinic acid, and flavone.

The invention discloses a method for preparing and partially-synthesizing chlorogenic acid from the processing residual liquid of aqua lonicerae foliae, which belongs to a method for manufacturing chemical substances or medicines and solves the problem of the existing chlorogenic acid extraction and preparation technology that a large amount of organic solvent is used and causes environmental pollution, or the production is difficult to expand as a relatively complex separation technology is used, or the extraction efficiency is low, the utilization rate of raw materials is relatively low and so on. The method comprises a deposition step, a separation step by using macroporous absorption resin, an acid hydrolysis step, a separation step by using ion exchange column, a semi-synthesis step and a crystallization step. The invention realizes comprehensive utilization of resources by adopting the processing residual liquid of aqua lonicerae foliae as a raw material, and can make full use of the caffeoylquinic acid substances during the extraction, hydrate the compounds into caffeic acid and quinic acid, then synthesize the chlorogenic acid and finally obtain chlorogenic acid with the purity over 99% through the crystallization step. The process of the invention is simple and can be easily expanded to industrial production while greatly improving the utilization rate of the raw material.

The present invention discloses composition containing dicaffeoyl quinic acid and its preparation process. The composition is suspension, gel or solution with or without dispersing medium. The composition is easy to take, acceptable, and especially suitable for long term taking and for children, aged people and people with dysphagia. The present invention also provides the preparation process of dicaffeoyl quinic acid solution.

The present invention discloses emulsion containing dicaffeoyl quinic acid and its preparation process. The emulsion has high stability and small particle size, and may be used in intravenous injection, intramuscular injection or oral taking. The emulsion may be obtained directly via dispersing the organic solution of dicaffeoyl quinic acid and emulsifier directly into water phase component.

The invention discloses an HPLC (High Performance Liquid Chromatography) method for simultaneously determining the contents of seven components in blumea balsamifera. Seven caffeoyl quinic acid components determined by the method are 5-O-caffeoyl quinic acid, 3-O-caffeoyl quinic acid, 4-O-caffeoyl quinic acid, 1,3-O-dicaffeoyl quinic acid, 3,4-O-dicaffeoyl quinic acid, 3,5-O-dicaffeoyl quinic acidand 4,5-O-dicaffeoyl quinic acid. The HPLC method comprises the following determining steps of (1) preparation of a standard solution; (2) preparation of a tested solution; (3) establishment of content determination standard curves of seven caffeoyl quinic acid components; (4) determination of the contents of seven caffeoyl quinic acid components in a sample. According to the HPLC method disclosed by the invention, the operation is simple and convenient, the precision degree, the repeatability and the stability are good, the accuracy is high, the contents of seven caffeoyl quinic acid components in the blumea balsamifera can be simultaneously determined, and higher practical value is obtained.

The invention relates to a method for improving the active ingredients of honeysuckle flowers, in particular to a method for improving the active ingredients of honeysuckle flower by a photoenzymaticinduction technology. The method comprises the following sequential steps of (1) taking the honeysuckle flowers; (2) performing -20 DEG C freezing; (3) performing alternate illumination by UV-A being320 to 400nm, UV-B with the wave length being 280 to 320nm and UV-C with the wave length being 200 to 280nm. The method has the advantages that the contents of caffeoyl quinic acid and iridoid glycoside of the active ingredients of the honeysuckle flowers can be obviously increased; the ultraviolet treatment time is greatly shortened; the environment-friendly effect is achieved; meanwhile, small experiments prove that the method is applicable to large-scale industrial production.

A method for isolating the bioactive component of the water-soluble extract of Uncaria tomentosa known as C-MED-100®, comprising (i) precipitating the spray drying carrier from C-MED-100®; (ii) using the resulting C-MED-100® to obtain a spotting mixture for thin layer chromatography (TLC); (iii) spotting the C-MED-100® spotting mixture on pre-run TLC plates and eluting the plates to obtain the fluorescing band with R_f=0.2-0.3; (iv) scraping off the R_f=0.2-0.3 band, eluting it in ammonia and freeze drying the eluted band to form a powder; and (v) extracting the powder with methanol to remove solubilized silica gel, concentrating the methanol solution and crystalizing the concentrated solution to obtain the bioactive component. The isolated bioactive component in vitro is a quinic acid analog, preferably quinic acid lactone. By contrast, the isolated bioactive component in vivo is quinic acid, whether as free acid or as a quinic acid salt, including quinic acid ammonium salt. A pharmaceutical composition comprising a pharmaceutically effective amount of the bioactive component and a nontoxic inert carrier or diluent. The bioactive component may be used to enhance immune competency, treat disorders associated with the immune system, inhibit the inflammatory response, treat disorders associated with the inflammatory response, enhance the anti-tumor response, and treat disorders associated with the response to tumor formation and growth, all in mammals.

The invention relates to an Aspergillus niger with a high yield of chlorgenic acid hydrolase screened from plant soil rich of chlorgenic acid, which is nominated as Aspergillus niger LN-1 by classification. The collection unit of the strain is the Center of General Microorganisms, China Committee for Culture Collection of Microorganisms, the collection date is July 14, 2008, and the collection registration number is CGMCC No.2589. The invention further mainly relates to a screening method of the strain, an enzyme production method and the application thereof for the preparation of caffeic acid and quinic acid. The Aspergillus niger LN-1 screened by the method is an aerobic fungus that is easy to be cultivated, produces a plurality of complex enzymes and has the advantages of rapid growth speed, strong reproduction, high-efficiency enzyme production, safeness, high efficiency, the production of chlorgenic acid hydrolase that has activity of orientatedly catalyzing and hydrolyzing the chlorgenic acid so as to compose the caffeic acid and the quinic acid, and high transformation efficiency.

The invention improves the unpleasant taste characteristic of potassium salts without affecting the original flavor of foods or drinks and increases the value of potassium salt as a salt substitute, in order to provide means and a salt composition for reducing sodium in foods and drinks.

By adding one or more of the following: quinic acid or a quinic acid-containing composition, spilanthol or a spilanthol-containing plant extract or plant essential oil, or an Allium plant extract, to a potassium salt or a potassium salt-containing food or drink, the unpleasant tastes such as acrid taste and metallic taste characteristic of potassium salts are improved while the salt flavor and taste are augmented.

An object of the present invention is to provide a beverage packed in a sealed container, which can suppress occurrence of precipitation for a long period and retain high flavor. The above-described problem can be overcome by containing (1) theanine ranging from 100 mg to 1000 mg and (2) quinic acid ranging from 30 mg to 300 mg per 500 ml beverage.

The invention discloses a novel use of artemisia annua and provides a novel raw material source for caffeoylquinic acid preparation. The use provided by the invention has the advantages that limitation of artemisia annua development and utilization are overcome; comprehensive and effective utilization of an artemisia annua resource is realized; and artemisia annua industrial-extraction residues are changed into things of value so that large economic benefits, social benefits and environmental benefits are obtained.

The invention discloses a Miao medicine Periploca forrestii Schltr. HPLC fingerprint study and multi-component content determination method. An HPLC method is used to establish fingerprints of Periploca forrestii Schltr. of different producing areas, contents of four kinds of caffeoyl quinic acid-type chemical constituents therein are determined, and a basis is provided for Periploca forrestii Schltr. medicinal material quality evaluation; a chromatographic column is Xtimate C18 (4.6mm x 250mm, 5[mu]m); 0.1% phosphoric acid aqueous solution (A)-acetonitrile (B) is used as mobile phases, and gradient elution is carried out; a flow rate is 1 mL/min; a column temperature is 30 DEG C; injection volume is 10[mu]L, and detection wavelength is 330nm; and a similarity evaluation system for chromatographic fingerprint of TCM (version 2012) is used for similarity analysis on samples, contents of four kinds of caffeoyl quinic acid-type chemical constituents can be determined simultaneously through the Periploca forrestii Schltr. HPLC fingerprints and content determination, the four kinds of constituents of the different producing areas have large differences, the content of each constituent has a certain relationship with a producing area, and a foundation is laid for later Miao medicine Periploca forrestii Schltr. quality standard study.

The invention belongs to the field of organic acid extraction and separation, and relates to a method for extracting shikimic acid and quinic acid from ginkgo leaves. The problems of long consumed time, large wastewater treatment capacity, environmental pollution, complicated operation and the like in the existing method are solved; the chemical properties of each component in the ginkgo leaves are compared; a carbon dioxide supercritical extraction-extraction-membrane filtration-electrodialysis-crystallization method is combined for use; on the premise of commercial value, various active ingredients, including chlorophyll, ginkgetin, bilobalide, gingko polysaccharide and the like, in the ginkgo leaves are developed to the maximum extent, and finally, shikimic acid and quinic acid productsare obtained through separation, and the content of the shikimic acid and the content of the quinic acid are respectively greater than 98%.