ABSTRACT
The ethanol and methanol extracts of Arbutus unedo leaves were screened for antioxidant activity. The antioxidant activity was determined by an improved assay based on the decolorization of the radical monocation of [2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid)] (ABTS). The ethanol and methanol extract of A. unedo leaves displayed potent antioxidant activity.
Subject(s)
Antioxidants/chemistry , Ericaceae , Phytotherapy , Plant Extracts/chemistry , Chromans , Humans , Plant LeavesABSTRACT
A quantitative determination of alpha-tocopherol in Arbutus unedo leaves was established by TLC-densitometry and colorimetry. Data obtained by TLC-densitometry were compared with those obtained by colorimetry. Also, the alpha-tocopherol content in leaves collected at different times of the year was studied comparatively. The highest amount of alpha-tocopherol was found in the March collection.
