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Studies on the Antioxidative Activities of Hsian-tsao (Mesona procumbens Hemsl) Leaf Gum
Abstract
This study aimed at evaluating the antioxidative activity of crude hsian-tsao leaf gum extracted by sodium bicarbonate solutions and precipitated by 70% ethanol. The antioxidative activities, including the radical-scavenging effects, Fe(2+)-chelating ability, and reducing power as well as the inhibition of FeSO(4)-H(2)O(2)-induced malondialdehyde formation in rat tissue homogenate were studied in vitro. It was found that the antioxidative effect provided by hsian-tsao leaf gum was strongly concentration dependent. In general, the antioxidative activity increased with increasing gum concentration, to a certain extent, and then leveled off with further increase in gum concentration. A concentrtaion-dependent kinetics for the rate of change in antioxidative activity was proposed. The antioxidative activity constant (k) and the half-inhibition concentration (IC(50)) for each antioxidative reaction studied were calculated. From a comparison of the IC(50) values for different antioxidative reactions, it seemed that hsian-tsao leaf gum was more effective in scavenging superoxide radicals than chelating Fe(2+) or scavenging alpha,alpha-diphenyl-beta-picrylhydrazyl (DPPH) radicals. As compared to the commercial antioxidants, hsian-tsao leaf gum showed less scavenging effect on the DPPH radical and reducing power but better superoxide radical-scavenging effect and Fe(2+)-chelating ability than alpha-tocopherol and BHT.
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Cited by
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Drużyńska, B., Wołosiak, R., Grzebalska, M., Majewska, E., Ciecierska, M., & Worobiej, E. (2021) · Antioxidants · doi:10.3390/antiox10121989 · Cited by 26
Metadata
- Authors
- Lai, L.-S., Chou, S.-T., & Chao, W.-W.
- Venue
- Journal of Agricultural and Food Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2001-01-24
- Volume
- 49
- Issue
- 2
- Pages
- 963-968
- ISSN
- 0021-8561 (ISSN-L)
- 1520-5118
- OpenAlex
- W2083735100
- Cited by
- 349
- References
- 0
- FWCI
- 12.13
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lai, L.-S., Chou, S.-T., & Chao, W.-W. (2001). Studies on the Antioxidative Activities of Hsian-tsao (Mesona procumbens Hemsl) Leaf Gum. Journal of Agricultural and Food Chemistry. https://doi.org/10.1021/jf001146k
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