NDLI: Antioxidant activity of extracts from Calocedrus formosana leaf, bark, and heartwood

Content Provider	Springer Nature Link
Author	Wang, Sheng Yang Wu, Jyh Horng Cheng, Sen Sung Lo, Chiu Ping Chang, Hsing Ning Shyur, Lie Fen Chang, Shang Tzen
Copyright Year	2004
Abstract	Calocedrus formosana Florin (Cupressaceae) is an endemic tree to Taiwan. To evaluate the antioxidant activity of the plant extracts from heartwood, bark, and leaf of C. formosana, assays for 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical and superoxide anion scavenging activities, as well as prevention of DNA strand cleavage were performed in this study. Similar IC50 values against the DPPH radical were found for the heartwood and bark extracts at approximately 23 µg/ml. Moreover, the heartwood extract exhibited the highest inhibitory activity against superoxide radicals among the test samples; a 2.3-fold lower value of IC50 for superoxide radical inhibition was found in the heartwood extract relative to that of (+)-catechin. Much less effect on inhibition of DPPH and superoxide radicals was found from the leaf extract of C. formosana. More than 70% of superoxide radicals were inhibited in the presence of 10 µg/ml heartwood extract, whereas only 15% inhibition was obtained from the leaf extract. The heartwood extract, at a dose of approximately 0.5 mg/ml, apparently completely prevented the ΦX174 supercoiled DNA cleavage induced by ultraviolet photolysis of H2O2, as judged by agarose gel electrophoresis. This report also suggests that the antioxidant activities of the plant extracts of C. formosana are in good correlation with their phenolic contents.
Starting Page	422
Ending Page	426
Page Count	5
File Format	PDF
ISSN	14350211
Journal	Journal of Wood Science
Volume Number	50
Issue Number	5
e-ISSN	16114663
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-10-25
Publisher Place	Tokyo
Access Restriction	Subscribed
Subject Keyword	Calocedrus formosana Heartwood extract Antioxidant activity Total phenolic content Characterization and Evaluation Materials Ceramics, Glass, Composites, Natural Methods Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Biomaterials Forestry

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