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Total antioxidant potential of resinous exudates from Heliotropium species, and a comparison of the ABTS and DPPH methods
Abstract
Total reactive antioxidant potential (TRAP) of resinous exudates from Heliotropium species was evaluated by measuring the bleaching of stable free radicals. The antioxidant capacity of the resinous exudates in Trolox equivalents, evaluated from the bleaching of ABTS derived radical cations, ranged from 2.0 M (H. huascoense) to 5.2 M (H. stenophyllum), indicating a very high concentration of phenolic compounds. Considerably smaller values were obtained by measuring the bleaching of DPPH radicals. The ratio between the values obtained employing ABTS derived radicals and DPPH, ranged from 37 (H. megalanthum) to 4.5 (H. chenopodiaceum variety typica). The magnitude of the difference can be considered as an indication of the relative reactivity of the antioxidants present in the exudates. Similar ratios were observed when stoichiometric coefficients were evaluated for representative purified flavonoids obtained from the resinous exudates.
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Citations
Cited by
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Havsteen, B. H. (2002) · Pharmacology & Therapeutics · doi:10.1016/s0163-7258(02)00298-x · Cited by 2,672
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Leong, L. P., & Shui, G. (2002) · Food Chemistry · doi:10.1016/s0308-8146(01)00251-5 · Cited by 1,091
Review of methods to determine chain-breaking antioxidant activity in food
ROGINSKY, V, & LISSI, E. (2005) · Food Chemistry · doi:10.1016/j.foodchem.2004.08.004 · Cited by 855
Self-citationMathew, S., & Abraham, T. E. (2006) · Food and Chemical Toxicology · doi:10.1016/j.fct.2005.06.013 · Cited by 451
Assay of total antioxidant capacity: comparison of four methods as applied to human blood plasma
Janaszewska, A., & Bartosz, G. (2002) · Scandinavian Journal of Clinical and Laboratory Investigation · doi:10.1080/003655102317475498 · Cited by 388
Metadata
- Authors
- Lissi, E. A., Modak, B., Torres, R., Escobar, J., & Urzua, A.
- Venue
- Free Radical Research
- Publisher
- Informa UK Limited
- Published
- 1999-01
- Volume
- 30
- Issue
- 6
- Pages
- 471-477
- ISSN
- 1029-2470 (ISSN-L)
- 1071-5762
- OpenAlex
- W2008708166
- Cited by
- 245
- References
- 0
- FWCI
- 2.14
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lissi, E. A., Modak, B., Torres, R., Escobar, J., & Urzua, A. (1999). Total antioxidant potential of resinous exudates from Heliotropium species, and a comparison of the ABTS and DPPH methods. Free Radical Research. https://doi.org/10.1080/10715769900300511
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