Antioxidants in medicinal plant extracts. A research study of the antioxidant capacity of Crataegus, Hamamelis and Hydrastis.
The antioxidant capacity of extracts of Crataegus oxyacantha, Hamamelis virginiana, Hydrastis canadensis, plants native to Europe and North America which have long been used in herbal medicine for the treatment of cardiac and circulatory functions, has been investigated. The total antioxidant potential conferred by all hydrogen donating antioxidants present in these extracts has been assessed by the ABTS assay and the relative order of antioxidant potential has been established. Gas chromatography coupled to mass spectrometry (GC-MS) has been used for the chemical identification of the antioxidant volatile compounds present in the extracts. The GC-MS data were related to the results obtained using the ABTS assay.
Periera da Silva
A
A
Laboratório de Genética da Faculdade de Medicina de Lisboa, 1600 Lisboa, Portugal.
Rocha
R
R
Silva
C M
CM
Mira
L
L
Duarte
M F
MF
Florêncio
M H
MH
D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification*; D052160:Benzothiazoles; D002839:Chromans / Q000737:chemistry; D005060:Europe; D005609:Free Radicals / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D007091:Image Processing, Computer-Assisted; D007202:Indicators and Reagents / Q000737:chemistry; D019684:Magnoliopsida / Q000737:chemistry; D009656:North America; D010936:Plant Extracts / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D019685:Rosales / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013451:Sulfonic Acids / Q000737:chemistry
D000975:Antioxidants; D052160:Benzothiazoles; D002839:Chromans; D005609:Free Radicals; D007202:Indicators and Reagents; D010936:Plant Extracts; D013451:Sulfonic Acids; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; C010643:6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid