FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1996998750> ?p ?o ?g. }

• W1996998750 endingPage "452" @default.
• W1996998750 startingPage "443" @default.
• W1996998750 abstract "The extract from stem bark of Stryphnodendron obovatum Benth. was chromatographed on a Sephadex® LH-20 column, and yielded nine compounds: gallic acid (GA), p-hydroxybenzoic acid (PHB), gallocatechin (GC), epigallocatechin (EPG), 4'-O-methylgallocatechin (MGC), epigallocatechin-(4β→8)-epigallocatechin (EPEP), epigallocatechin-(4β→8)-gallocatechin (EPGC), robinetinidol-(4α→8)-gallocatechin (ROGC) and robinetinidol-(4β→8)-epigallocatechin (ROEP). Evaluation of the antioxidant capacity in vitro by the methods of DPPH free radical (IC50; μg/mL) and reduction of the phosphomolybdenum complex (RAC) gave the following results, respectively: crude extract 4.52 and 0.8242; ethyl-acetate fraction 4.04 and 0.9537; aqueous fraction 5.58 and 0.9275. The crude extract and ethyl-acetate fraction were shown to possess an antioxidant capacity comparable to that of vitamin C (4.93 and 1.0). The values obtained by the DPPH free-radical method for the isolated compounds were IC50 (μM): GA=8.89; PHB=10.12; GC=16.46; EPG=13.20; MGC=21.00; EPEP=6.89; EPGC=4.91; ROGC=7.78 and ROEP=6.20. Vitamin C and trolox showed 30.11 and 30.10, respectively. Dimers showed greater activity in scavenging free radicals, possibly related to the number of hydroxyls. However, compounds without a hydroxyl at position 5 of the A-ring (5-deoxy-proanthocyanidins) did not change the antioxidant activity of the DPPH free radical, as evaluated here for the first time. Among the monomers, there appeared to be a direct relationship in scavenging of free radicals because of the stereochemistry of the compounds. The presence of a methyl radical on the B-ring significantly reduced the scavenging of free radicals of gallocatechin. All compounds showed greater scavenging of radicals than vitamin C and trolox, and these two compounds showed no significant difference from each other." @default.
• W1996998750 created "2016-06-24" @default.
• W1996998750 creator A5000363280 @default.
• W1996998750 creator A5025310459 @default.
• W1996998750 creator A5033131067 @default.
• W1996998750 creator A5084739050 @default.
• W1996998750 date "2009-09-01" @default.
• W1996998750 modified "2023-10-01" @default.
• W1996998750 title "Antioxidant capacity of extracts and isolated compounds from Stryphnodendron obovatum Benth" @default.
• W1996998750 cites W1504360191 @default.
• W1996998750 cites W1966432961 @default.
• W1996998750 cites W1976333338 @default.
• W1996998750 cites W1978948185 @default.
• W1996998750 cites W1992251391 @default.
• W1996998750 cites W1995629023 @default.
• W1996998750 cites W1995687462 @default.
• W1996998750 cites W1996723631 @default.
• W1996998750 cites W2002154795 @default.
• W1996998750 cites W2003986039 @default.
• W1996998750 cites W2014990938 @default.
• W1996998750 cites W2035591681 @default.
• W1996998750 cites W2036394441 @default.
• W1996998750 cites W2054817969 @default.
• W1996998750 cites W2059856027 @default.
• W1996998750 cites W2061809139 @default.
• W1996998750 cites W2075481977 @default.
• W1996998750 cites W2077013120 @default.
• W1996998750 cites W2114509365 @default.
• W1996998750 cites W2122205720 @default.
• W1996998750 cites W2128416318 @default.
• W1996998750 cites W2135264735 @default.
• W1996998750 cites W2144483204 @default.
• W1996998750 cites W2145063401 @default.
• W1996998750 cites W2317895740 @default.
• W1996998750 cites W2913078243 @default.
• W1996998750 cites W4239734049 @default.
• W1996998750 doi "https://doi.org/10.1590/s1984-82502009000300009" @default.
• W1996998750 hasPublicationYear "2009" @default.
• W1996998750 type Work @default.
• W1996998750 sameAs 1996998750 @default.
• W1996998750 citedByCount "16" @default.
• W1996998750 countsByYear W19969987502012 @default.
• W1996998750 countsByYear W19969987502014 @default.
• W1996998750 countsByYear W19969987502015 @default.
• W1996998750 countsByYear W19969987502016 @default.
• W1996998750 countsByYear W19969987502017 @default.
• W1996998750 countsByYear W19969987502019 @default.
• W1996998750 countsByYear W19969987502021 @default.
• W1996998750 countsByYear W19969987502022 @default.
• W1996998750 countsByYear W19969987502023 @default.
• W1996998750 crossrefType "journal-article" @default.
• W1996998750 hasAuthorship W1996998750A5000363280 @default.
• W1996998750 hasAuthorship W1996998750A5025310459 @default.
• W1996998750 hasAuthorship W1996998750A5033131067 @default.
• W1996998750 hasAuthorship W1996998750A5084739050 @default.
• W1996998750 hasBestOaLocation W19969987501 @default.
• W1996998750 hasConcept C133446333 @default.
• W1996998750 hasConcept C139066938 @default.
• W1996998750 hasConcept C178790620 @default.
• W1996998750 hasConcept C185592680 @default.
• W1996998750 hasConcept C18903297 @default.
• W1996998750 hasConcept C2776231299 @default.
• W1996998750 hasConcept C2778004101 @default.
• W1996998750 hasConcept C2778362808 @default.
• W1996998750 hasConcept C2779858419 @default.
• W1996998750 hasConcept C2780022331 @default.
• W1996998750 hasConcept C2781401929 @default.
• W1996998750 hasConcept C31903555 @default.
• W1996998750 hasConcept C43617362 @default.
• W1996998750 hasConcept C70899900 @default.
• W1996998750 hasConcept C77784730 @default.
• W1996998750 hasConcept C86803240 @default.
• W1996998750 hasConceptScore W1996998750C133446333 @default.
• W1996998750 hasConceptScore W1996998750C139066938 @default.
• W1996998750 hasConceptScore W1996998750C178790620 @default.
• W1996998750 hasConceptScore W1996998750C185592680 @default.
• W1996998750 hasConceptScore W1996998750C18903297 @default.
• W1996998750 hasConceptScore W1996998750C2776231299 @default.
• W1996998750 hasConceptScore W1996998750C2778004101 @default.
• W1996998750 hasConceptScore W1996998750C2778362808 @default.
• W1996998750 hasConceptScore W1996998750C2779858419 @default.
• W1996998750 hasConceptScore W1996998750C2780022331 @default.
• W1996998750 hasConceptScore W1996998750C2781401929 @default.
• W1996998750 hasConceptScore W1996998750C31903555 @default.
• W1996998750 hasConceptScore W1996998750C43617362 @default.
• W1996998750 hasConceptScore W1996998750C70899900 @default.
• W1996998750 hasConceptScore W1996998750C77784730 @default.
• W1996998750 hasConceptScore W1996998750C86803240 @default.
• W1996998750 hasIssue "3" @default.
• W1996998750 hasLocation W19969987501 @default.
• W1996998750 hasLocation W19969987502 @default.
• W1996998750 hasOpenAccess W1996998750 @default.
• W1996998750 hasPrimaryLocation W19969987501 @default.
• W1996998750 hasRelatedWork W1996998750 @default.
• W1996998750 hasRelatedWork W2069694605 @default.
• W1996998750 hasRelatedWork W2091645862 @default.
• W1996998750 hasRelatedWork W2145958305 @default.
• W1996998750 hasRelatedWork W2273075933 @default.

• next