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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Chemical composition of the volatile extract and antioxidant activities of the volatile and nonvolatile extracts of Egyptian corn Silk (Zea mays L.)
Journal of Agricultural and Food Chemistry, Volume 55, No. 22, Year 2007
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Description
A total of 36 compounds, which comprised 99.4% of the extract, were identified by gas chromatography and mass spectrometry (GC-MS) in the volatile dichloromethane extract obtained from Egyptian corn silk. The main constituents of the volatile extract were cis-α-terpineol (24.22%), 6,11-oxidoacor-4-ene (18.06%), citronellol (16.18%), trans-pinocamphone (5.86%), eugenol (4.37%), neo-iso-3-thujanol (2.59%), and cis-sabinene hydrate (2.28%). Dried Egyptian corn silk was also directly extracted with petroleum ether, ethanol, and water. All extracts from solvent extraction and the volatile extract described above exhibited clear antioxidant activities at levels of 50-400 μg/mL in the 2,2-diphenyl-1-picrylhydrazyl (DPPH)/linoleic acid assay. The ethanol extract inhibited DPPH activity by 84% at a level of 400 μg/mL. All samples tested via the β-carotene bleaching assay also exhibited satisfactory antioxidant activity with clear dose responses. This study indicates that corn silk could be used to produce novel natural antioxidants as well as a flavoring agent in various food products. © 2007 American Chemical Society.
Authors & Co-Authors
El-Ghorab, Ahmed H.
Egypt, Giza
National Research Centre
El-Massry, Khaled Farouk
Egypt, Giza
National Research Centre
Shibamoto, Takayushi Yuki
United States, Davis
University of California, Davis
Statistics
Citations: 117
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1021/jf071646e
ISSN:
00218561
Research Areas
Environmental
Food Security