Caffeic Acids: A class of phenolic acids related to chlorogenic acid, p-coumaric acid, vanillic acid, etc., which are found in plant tissues. It is involved in plant growth regulation.Catechin: An antioxidant flavonoid, occurring especially in woody plants as both (+)-catechin and (-)-epicatechin (cis) forms.Phenylethyl Alcohol: An antimicrobial, antiseptic, and disinfectant that is used also as an aromatic essence and preservative in pharmaceutics and perfumery.Chlorogenic Acid: A naturally occurring phenolic acid which is a carcinogenic inhibitor. It has also been shown to prevent paraquat-induced oxidative stress in rats. (From J Chromatogr A 1996;741(2):223-31; Biosci Biotechnol Biochem 1996;60(5):765-68).Tea: The infusion of leaves of CAMELLIA SINENSIS (formerly Thea sinensis) as a beverage, the familiar Asian tea, which contains CATECHIN (especially epigallocatechin gallate) and CAFFEINE.Camellia sinensis: Camellia sinensis L. (formerly Thea sinensis) is an evergreen Asiatic shrub of the THEACEAE family. The infusion of leaves of this plant is used as Oriental TEA which contains CAFFEINE; THEOPHYLLINE; and epigallocatechin gallate.Coumaric Acids: Hydroxycinnamic acid and its derivatives. Act as activators of the indoleacetic acid oxidizing system, thereby producing a decrease in the endogenous level of bound indoleacetic acid in plants.Phenols: Benzene derivatives that include one or more hydroxyl groups attached to the ring structure.CinnamatesQuinic Acid: An acid which is found in cinchona bark and elsewhere in plants. (From Stedman, 26th ed)Chromatography, High Pressure Liquid: Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.Hydroxybenzoates: Benzoate derivatives substituted by one or more hydroxy groups in any position on the benzene ring.Polyphenols: A large class of organic compounds having more than one PHENOL group.Plant Extracts: Concentrated pharmaceutical preparations of plants obtained by removing active constituents with a suitable solvent, which is evaporated away, and adjusting the residue to a prescribed standard.Flavonoids: A group of phenyl benzopyrans named for having structures like FLAVONES.Propolis: A resinous substance obtained from beehives that is used traditionally as an antimicrobial. It is a heterogeneous mixture of many substances.Rutin: A flavonol glycoside found in many plants, including BUCKWHEAT; TOBACCO; FORSYTHIA; HYDRANGEA; VIOLA, etc. It has been used therapeutically to decrease capillary fragility.Antioxidants: Naturally occurring or synthetic substances that inhibit or retard the oxidation of a substance to which it is added. They counteract the harmful and damaging effects of oxidation in animal tissues.PicratesGallic Acid: A colorless or slightly yellow crystalline compound obtained from nutgalls. It is used in photography, pharmaceuticals, and as an analytical reagent.Biflavonoids: Dimers (homo and hetero) of FLAVONOIDS.Proanthocyanidins: Dimers and oligomers of flavan-3-ol units (CATECHIN analogs) linked mainly through C4 to C8 bonds to leucoanthocyanidins. They are structurally similar to ANTHOCYANINS but are the result of a different fork in biosynthetic pathways.Lignin: The most abundant natural aromatic organic polymer found in all vascular plants. Lignin together with cellulose and hemicellulose are the major cell wall components of the fibers of all wood and grass species. Lignin is composed of coniferyl, p-coumaryl, and sinapyl alcohols in varying ratios in different plant species. (From Merck Index, 11th ed)Free Radical Scavengers: Substances that influence the course of a chemical reaction by ready combination with free radicals. Among other effects, this combining activity protects pancreatic islets against damage by cytokines and prevents myocardial and pulmonary perfusion injuries.Lamiaceae: The mint plant family. They are characteristically aromatic, and many of them are cultivated for their oils. Most have square stems, opposite leaves, and two-lipped, open-mouthed, tubular corollas (united petals), with five-lobed, bell-like calyxes (united sepals).Depsides: Phenolic benzoic acid esters.Catechols: A group of 1,2-benzenediols that contain the general formula R-C6H5O2.Quercetin: A flavonol widely distributed in plants. It is an antioxidant, like many other phenolic heterocyclic compounds. Glycosylated forms include RUTIN and quercetrin.Camellia: A plant genus in the family THEACEAE, order THEALES best known for CAMELLIA SINENSIS which is the source of Oriental TEA.Molecular Structure: The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.Biphenyl CompoundsLonicera: A plant genus of the family CAPRIFOLIACEAE. Members contain iridoid glucosides.Ipomoea batatas: A plant species of the genus IPOMOEA, family CONVOLVULACEAE. Some cultivars are sweet and edible whereas bitter varieties are a source of SAPONINS. This sweet potato is sometimes referred to as a yam (DIOSCOREA).Centaurea: A plant genus of the family ASTERACEAE. Members contain 5-methyl-8-hydroxycoumarin. The common name of centaury is more often used for CENTAURIUMFlavonols: A group of 3-hydroxy-4-keto-FLAVONOIDS.Coffee: A beverage made from ground COFFEA beans (SEEDS) infused in hot water. It generally contains CAFFEINE and THEOPHYLLINE unless it is decaffeinated.Tannins: Polyphenolic compounds with molecular weights of around 500-3000 daltons and containing enough hydroxyl groups (1-2 per 100 MW) for effective cross linking of other compounds (ASTRINGENTS). The two main types are HYDROLYZABLE TANNINS and CONDENSED TANNINS. Historically, the term has applied to many compounds and plant extracts able to render skin COLLAGEN impervious to degradation. The word tannin derives from the Celtic word for OAK TREE which was used for leather processing.Wine: Fermented juice of fresh grapes or of other fruit or plant products used as a beverage.GlucosidesCacao: A tree of the family Sterculiaceae (or Byttneriaceae), usually Theobroma cacao, or its seeds, which after fermentation and roasting, yield cocoa and chocolate.Echinacea: A genus of perennial herbs used topically and internally. It contains echinacoside, GLYCOSIDES; INULIN; isobutyl amides, resin, and SESQUITERPENES.PhenylpropionatesAnthocyanins: A group of FLAVONOIDS derived from FLAVONOLS, which lack the ketone oxygen at the 4-position. They are glycosylated versions of cyanidin, pelargonidin or delphinidin. The conjugated bonds result in blue, red, and purple colors in flowers of plants.Honey: A sweet viscous liquid food, produced in the honey sacs of various bees from nectar collected from flowers. The nectar is ripened into honey by inversion of its sucrose sugar into fructose and glucose. It is somewhat acidic and has mild antiseptic properties, being sometimes used in the treatment of burns and lacerations.Anticarcinogenic Agents: Agents that reduce the frequency or rate of spontaneous or induced tumors independently of the mechanism involved.Plant Bark: The outer layer of the woody parts of plants.Methyltransferases: A subclass of enzymes of the transferase class that catalyze the transfer of a methyl group from one compound to another. (Dorland, 28th ed) EC 2.1.1.Rhodobacter: A genus of gram-negative bacteria widely distributed in fresh water as well as marine and hypersaline habitats.Antimutagenic Agents: Agents that reduce the frequency or rate of spontaneous or induced mutations independently of the mechanism involved.Protocatechuate-3,4-Dioxygenase: An enzyme that catalyzes the oxidation of protocatechuate to 3-carboxy-cis-cis-muconate in the presence of molecular oxygen. It contains ferric ion. EC 1.13.11.3.Catechol Oxidase: An enzyme of the oxidoreductase class that catalyzes the reaction between catechol and oxygen to yield benzoquinone and water. It is a complex of copper-containing proteins that acts also on a variety of substituted catechols. EC 1.10.3.1.Sulfonic Acids: Inorganic or organic oxy acids of sulfur which contain the RSO2(OH) radical.Salvia officinalis: A plant species of the Salvia genus known as a spice and medicinal plant.Spectrophotometry, Ultraviolet: Determination of the spectra of ultraviolet absorption by specific molecules in gases or liquids, for example Cl2, SO2, NO2, CS2, ozone, mercury vapor, and various unsaturated compounds. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Transition Elements: Elements with partially filled d orbitals. They constitute groups 3-12 of the periodic table of elements.Plant Leaves: Expanded structures, usually green, of vascular plants, characteristically consisting of a bladelike expansion attached to a stem, and functioning as the principal organ of photosynthesis and transpiration. (American Heritage Dictionary, 2d ed)Oxidation-Reduction: A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).Magnetic Resonance Spectroscopy: Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).Paullinia: A plant genus of the family SAPINDACEAE. The seed of P. cupana is the source of guarana powder which contains 4% CAFFEINE.Polymers: Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).Dose-Response Relationship, Drug: The relationship between the dose of an administered drug and the response of the organism to the drug.Hydroxyl Radical: The univalent radical OH. Hydroxyl radical is a potent oxidizing agent.Plant Stems: Parts of plants that usually grow vertically upwards towards the light and support the leaves, buds, and reproductive structures. (From Concise Dictionary of Biology, 1990)
438-446 Identification of autoxidation oligomers of flavan-3-ols in model solutions by HPLC-MS/MS. Fei He, Qiu-Hong Pan, Ying ... catechin and (−)-epicatechin. Weixing Sun, Miller Jack M., Journal of mass spectrometry, 2003, vol. 38, no4, pp. ... 2008 Nonenzymic Autoxidative Reactions of Caffeic Acid in Wine. Johannes J. L. Cilliers 1 and Vernon L. Singleton, Am. J. Enol ...
Caffeic, ferulic acids, Myristicin, Eugenol, Umbelliferone, aesculetin, Bergenon, Eugenin 10 C6-C4 1 Naphthoquinones Juglone, ... The aquatic plant Myriophyllum spicatum produces ellagic, gallic and pyrogallic acids and (+)-catechin.[60] ... Quantitation results produced by the means of diode array detector-coupled HPLC are generally given as relative rather than ... For example, ellagic acid is a dimer of gallic acid and forms the class of ellagitannins, or a catechin and a gallocatechin can ...
For example, ellagic acid is a dimer of gallic acid and forms the class of ellagitannins, or a catechin and a gallocatechin can ... Hypogallic acid, caffeic acid, paeoniflorin and pikuroside can be isolated from the freshwater fern Salvinia molesta. In ... Quantitation results produced by the means of diode array detector-coupled HPLC are generally given as relative rather than ... An example of such molecules is catechin. Cavicularin is an unusual macrocycle because it was the first compound isolated from ...
... often have chiral centers.[25] An example of such a molecule is catechin.[citation needed] Cavicularin is an unusual ... Caffeic, ferulic acids, Myristicin, Eugenol, Umbelliferone, aesculetin, Bergenon, Eugenin. 10. C6-C4. 1. Naphthoquinones. ... Quantitation results produced by the means of diode array detector-coupled HPLC are generally given as relative rather than ... The aquatic plant Myriophyllum spicatum produces ellagic, gallic and pyrogallic acids and (+)-catechin.[73] ...
Reversed-phase HPLC plot of separation of phenolic compounds. Smaller natural phenols formed individual peaks while tannins ... Flavonoids and caffeic acid derivatives are biosynthesized from phenyl alanine and malonyl-CoA. Complex gallotannins develop ... oligomeric catechins) by various groups[22] and of resveratrol polyphenols by the Snyder group at Columbia that included the ... Quantitation results produced by the mean of diode array detector-coupled HPLC are generally given as relative rather than ...
... catechin, epicatechin and epicatechin gallate) and procyanidin oligomers. Grape skin extracts contain four monomers (catechin, ... In wine they are present also in the free form (trans-caffeic, trans-p-coumaric, and trans-ferulic acids).[27] ... Mattivi F. (1993). "Solid phase extraction of trans-resveratrol from wines for HPLC analysis". Zeitschrift für Lebensmittel- ... Vinylpyranomalvidin-3O-acetylglucoside-catechin. Effects of phenolics in wine[edit]. Phenolic compounds may interact with ...
... catechin; 3, caffeic acid; 4, epicatechin; 5, epigallocatechin gallate; 6, coumaric acid; 7, rutin; 8, catechin gallate; 9, ... Typical HPLC chromatogram of phenolic and flavonoid (a) standards and (b) compounds in the Artemisia capillaris Thunb. extract ...
Figure 3 HPLC chromatogram of the phenolic fraction of COC: peak numbers (1) gallic acid; (2) catechin; (3) chlorogenic acid; ( ... catechin, chlorogenic acid, caffeic acid and elagic acid are orthophenols. They cover about 70% of the total weight and 63% of ... HPLC method used is based on the reported procedures (Seneviratne & Dissanayake, 2008; Seneviratne & Kotuwegedara, 2009). HPLC ... HPLC chromatogram of COCE is given in Figure 3. A major portion of the signals in the chromatogram were identified as either ...
HPLC characterization of phenolics showed changes on processing in content of catechin, caffeic, vanillic, protocatechuic and ...
Some of the individual phenolic compounds (gallic acid, catechin, caffeic acid, p-coumaric acid, quercetin-3-glucoside, ... The HPLC analysis for individual phenolic compounds was performed with a diode array HPLC detector, adapted from a method ... catechin (CAT), procyanidin B1 (B1), petunidin-3-gluc, caffeic acid (CAA), coutaric acid (COA), peonidin-3-glucoside, malvidin- ... catechin (CAT), procyanidin B1 (B1), petunidin-3-gluc, caffeic acid (CAA), coutaric acid (COA), peonidin-3-glucoside, malvidin- ...
1) protocatechuic acid, (2) kaempferol, (3) catechin, (4) myricetin, (5) caffeic acid, (6) quercetin, (7) ferulic acid, (8) ... HPLC conditions. A Thermo Finnigan Surveyor HPLC system (Waltham, Mass., U.S.A.) coupled with a Phenomenex C-18 column (synergi ... catechin and (-) epicatechin. All organic solvents used were of HPLC grade. Methanol, acetone, ethyl acetate and acetonitrile ... catechin hydrate and 5.7 mg/ml (-)- epicatechin. Each day working solutions were prepared by 100 × dilution with initial HPLC ...
Louis, MO, USA). Acetonitrile (HPLC), methanol (HPLC), acetic acid (HPLC), and ethanol were obtained from Merck (Darmstadt, ... Arbutin (AR), gallic acid (GA), hydroquinone (HQ), (+)-catechin hydrate (CH), vanillic acid (VA), caffeic acid (CA), Syringic ... HPLC-DAD analysis of Citrus macroptera extract showed the great presence of caffeic acid and (−) epicatechin. ... HPLC chromatogram of Citrus macroptera. Peaks: 1, caffeic acid; 2, syringic acid; 3, (−)-epicatechin; 4, vanillin; 5, benzoic ...
Chlorogenic, caffeic and rosmarinic acids were identified and quantified by HPLC/DAD. These results show that S. guaraniticum ... 0.68 mg catechin equivalents/g) and alkaloids (10.79 ± 0.06 mg/g). This fraction was effective in the scavenging of reactive ... 0.68 mg catechin equivalents/g) and alkaloids (10.79 ± 0.06 mg/g). This fraction was effective in the scavenging of reactive ... Chlorogenic, caffeic and rosmarinic acids were identified and quantified by HPLC/DAD. These results show that S. guaraniticum ...
Phenolic compounds isolated from M. charantia are gallic acid, tannic acid, (+)-catechin, caffeic acid, p-coumaric, gentisic ... HPLC) analysis. ... Green tea catechins have also been proposed as therapeutic ... T. Nagao, Y. Komine, S. Soga et al., "Ingestion of a tea rich in catechins leads to a reduction in body fat and malondialdehyde ... Phenolic compounds isolated from the bitter melon are catechin, gallic acid, ferulic acid, p-coumaric acid, gentisic acid, ...
HPLC-DAD analysis of MBM indicated the existence of gallic acid, catechin, caffeic acid and rutin. MBM administration ... The HPLC-DAD analysis of MBM indicated the presence of gallic acid (3.329 ± 0.006 μg/mg dry extract), catechin (1.342 ± 0.004 ... Among the standards gallic acid was analyzed at 230, rutin at 257 nm, catechin at 279 nm, caffeic acid at 325 nm and quercetin ... TLC analysis of MBM indicated the presence of gallic acid, catechin, caffeic acid and rutin. The presence of these compounds ...
Ellagic acid and p-coumeric acid were detected through HPLC. A total of eight compounds including naringenin, β-sitosterol were ... Identification of compounds of the extract was made through HPLC and LCMS. Antihyperglycemic activity was assessed by oral ... Gallic acid, caffeic acid, p-coumaric acid, (+)-catechin hydrate, (−)-epicatechin, vanillic acid, rutin hydrate, ellagicacid, ... HPLC chromatogram of a standard mixture of polyphenolic compounds (peak 1: gallicacid, 2:(+)-catechin, 3:vanillic acid 4: ...
... caffeic acid, p-coumaric acid, ferulic acid, ellagic acid, catechin, epicatechin, rutin, naringin, myrecetin, quercetin, ... 2.6.2. HPLC Analysis of Sugars. HPLC determination of sugars was performed on Waters 484 system, connected to a refractometric ... 2.6.1. HPLC Analysis of Phenolic Compounds. High Performance Liquid Chromatography (HPLC) analyses of phenolic components were ... 2006) [29]. The results were expressed as milligrams of catechin equivalents (CE) per liter of juice. ...
HPLC) coupled with a multi-wavelength ultraviolet-visible (UV-vis) detector. The antioxidant capacity of the plant extracts was ... HPLC Analysis. The analytical HPLC system employed consisted of a JASCO high performance liquid chromatograph coupled with a UV ... Catechin, quercetin and rutin were the most abundant flavonoids. Quercetin has been reported to be present in a large number of ... Caffeic acid was detected in all the examined plant extracts. Ferulic acid was also detected in all the methanolic extracts, ...
... catechin (CAT), chlorogenic acid (CA), (−)-epicatechin (ECAT), caffeic acid, rutin, and phloridizin. Analytical separations ... Tsao R , Yang R, Young CJ, et al. Polyphenolic profiles in eight apple cultivars using HPLC. J Agric Food Chem2003;51:7347-53. ... This is in agreement with previous data reported in the literature.30,31 Caffeic acid and other phenolic acid were only present ... Lommen A , Godejohann M, Venema D, et al. Application of directly coupled HPLC-NMR-MS to the identification and confirmation of ...
and quantification of its phenolic constituents by RP-HPLC. Download Prime PubMed App to iPhone, iPad, or Android ... catechin, caffeic acid, p-coumaric acid and quercetin were also quantified in different extracts by RP-HPLC. SN - 1520-5118 UR ... catechin, caffeic acid, p-coumaric acid and quercetin were also quantified in different extracts by RP-HPLC. ... and quantification of its phenolic constituents by RP-HPLC. Journal of Agricultural and Food Chemistry, 56(21), 10129-34. https ...
The determination of monomeric phenolic compounds (galic acid, catechin, caffeic acid and epicatechin) and methylxantines ( ... HPLC Method for the quantification of procyanidins in cocoa and chocolate samples and correlation to total antioxidant capacity ... The phenolic content was calculated based on the catechin calibration curve.. Determination of monomeric phenols and ... Caffeic acid was the phenolic compound with lower content detected in the samples, showing no statistical differences between ...
Caffeic acid and umbel- liferone were observed only in H. armigera-infested plants of ICG 2271 ICG 1697 JL 24 H. armigera APHID ... The HPLC system used was of Waters Series consisting of a Separation module (2695) with Controller (600) and equipped with ... This was followed by the infested plants of ICG 1697 (4304.26 ng). Catechin content was greater in the aphid-infested plants of ... HPLC fingerprinting. After six days of insect infesta- tion, leaves were collected from insect-infested and uninfested control ...
Significant value of rutin and caffeic acid was observed via high performance liquid chromatography. These results showed that ... Here, we screened R. arvensis for antioxidant activity, phytochemical and high performance liquid chromatography (HPLC) ... The HPLC profile of methanol extract of R. arvensis showed the presence of rutin (0.44%) and caffeic acids (0.017%). In ... Rutin and gallic acid were analyzed at 257 nm, catechin at 279 nm, caffeic acid at 325 nm and quercetin, myricetin, kampferol ...
... caffeic acid, ferulic acid, sinapic acid, and the ester chlorogenic acid); (c) flavonoids, the flavanols catechin and ... Traces obtained at 280 and 350 nm in HPLC runs of the ethyl acetate-soluble fractions of eight samples indicated the presence ...
Protocatechuic, catechin, caffeic and p-coumaric content of the study differed from our findings. Anticancer, antiallergy and ... HPLC analysis: The phenolic extracts of mushroom species were determined by using HPLC equipment consisting of an integrated ... 2000) Conversion of procyanidin B-type (catechin dimer) to A-type: evidence for abstraction of C-2 hydrogen in catechin during ... catechin, quercetin and rutin were determined by HPLC technic (Table I). P. ostreatus contains the analyzed phenol compounds at ...
Protective antioxidative effects of caffeic acid phenethyl ester (CAPE) in the thyroid and the liver are similar to those ... A previously reported HPLC-FLD procedure based on pre-column derivatisation with 4-methoxy-o-phenylenediamine was adopted, ... The flavonoids, kaempferol, and catechin were most abundant, followed by myricetin and naringenin. The mean moisture content, ... Caffeic acid phenethyl ester (CAPE), a component of honeybee propolis, has been suggested to be also an effective antioxidant. ...
A total of five different phenolic acids were identified, with the most abundant being caffeic acid, benzoic acid, gallic acid ... A new high performance liquid chromatography (HPLC) equipped with a UV detector method was developed for the identification of ... The flavonoids, kaempferol, and catechin were most abundant, followed by myricetin and naringenin. The mean moisture content, ...
Find out information about caffeic acid. C9H8O4 A yellow crystalline acid that melts at 223-225°C with decomposition; soluble ... in water and alcohol Explanation of caffeic acid ... HPLC standards (gallic acid, trans sinapic acid, chlorogenic ... acid, caffeic acid, ferullic acid, sinapic acid, vanillic acid, [rho]-coumaric acid, catechin, epicatechin, rutin, myricetin, ... caffeic acid. Also found in: Dictionary, Wikipedia. caffeic acid. [ka′fē·ik ′as·əd] (organic chemistry) C9H8O4 A yellow ...
The following phenolic compounds were identified in CPW, in mg L−1: caffeic acid (40.08), catechin (8.51) and gallocatechin ( ... Chromatographic analyses were performed using an Agilent HPLC equipment model 1100, equipped with a binary pump, an auto ... The major phenolic compound found was caffeic acid, followed by catechin and gallocatechin. The high concentration of these ... The phenolic standards used were: caffeic acid, gallic acid, gallocatechin, 3,4-dihydroxybenzene, catechin, chlorogenic acid, ...
HPLC analysis of wild-type A. carvifolia revealed the presence of flavonoids such as caffeic acid (30 μg/g DW), quercetin (10 ... HPLC analysis was performed to detect the antioxidants. With the aim of increasing flavonoid content, Rol gene transgenics of A ... was carried out using an HPLC-DAD system. Eight flavonoid markers (caffeic acid, quercetin, isoquercetin, rutin, catechin, ... HPLC analysis of wild-type A. carvifolia revealed the presence of flavonoids such as caffeic acid (30 μg/g DW), quercetin (10 ...
... were also identified and quantified by HPLC/UV-DAD. Key words: Hancornia speciosa Gomes; medicinal plants; Gas chromatography; ... Some compounds such as Chlorogenic acid ( 35 mg g-1 in leaves and fruits), Catechin ( 35 mg g-1 in leaves, peels and fruits ... Caffeic acid, p-coumaric acid, ferric acid, rutin, chlorogenic acid, catechin, isoquercetin, quercetin, and luteolin (purchased ... HPLC-UV-DAD analyses. The HPLC analysis of the extracts was performed on a Liquid Chromatograph (Shimadzu model LC-20) equipped ...
  • 2,2-diphenyl-1-picrylhydrazyl) were acquired from E. Merck, Darmstadt, Germany, while the reagents for the high-performance phenolic liquid chromatography (HPLC) and enzyme analyzes were acquired from Sigma-Aldrich (except for piceid HPLC grade, which was acquired from Polyphenols Laboratories AS, Sandnes, Norway). (plksignaling.com)
  • In the present study, our objective was to evaluate its in vivo antioxidant potency against CCl 4 induced nephrotoxicity and investigates the bioactive phytochemicals by HPLC-DAD analysis. (biomedcentral.com)
  • A kaempferol-catechin adduct was also identified, whose content increased during aging in CDC Pintium, suggesting that it is formed during the process of oxidation. (springer.com)
  • Apricots are a strong dietary source of catechins, a broad family of flavonoid phytonutrients (you may be familiar with these phytonutrients since they are often cited for the benefits provided by green tea). (whfoods.org)
  • But we have seen human research where diets rich in catechins-not specifically from apricots but from other catechin-rich foods like tea or cocoa-have led to significant beneficial changes. (whfoods.org)
  • Researchers have discovered that catechins can inhibit the activity of an enzyme called cyclooxygenase-2 (COX-2), one of the critical steps in the process of inflammation. (whfoods.org)
  • Métodos: la composición química se determinó por métodos cromatográficos (HPLC-ESI-MS). La capacidad antioxidante se evaluó por los métodos DPPH, ABTS, y la estabilización del radical hidroxilo. (bvsalud.org)
  • A DPPH-HPLC method was developed recently for DPPH radical scavenging activity of colored foods (Tomoko, 1998). (regional.org.au)
  • High performance liquid chromatography (HPLC) fingerprinting of phenols of groundnut (Arachis hypogaea) plants with differential levels of resistance was carried out in response to Helicoverpa armigera (chewing insect) and Aphis craccivora (sucking pest) infestation. (slideshare.net)
  • Here, we screened R. arvensis for antioxidant activity, phytochemical and high performance liquid chromatography (HPLC) analyses. (biomedcentral.com)
  • The phytochemical content of S. cordata ethyl acetate fractions was also evaluated using high-performance liquid chromatography with diode array detection (HPLC-DAD). (health.news)
  • The great beneficial influence of GTE was attributed to the high content of catechins. (springeropen.com)
  • For instance, multiple studies have shown that catechin-rich foods can protect blood vessels from inflammation-related damage, leading to better blood pressure control. (whfoods.org)
  • Traces obtained at 280 and 350 nm in HPLC runs of the ethyl acetate-soluble fractions of eight samples indicated the presence of many more phenolic substances, most at very low concentration with some varibilities in peak heights, but not in retention times, among the syrups. (gc.ca)