Free radical scavenging activity of grape seed extract and antioxidants by electron spin resonance spectrometry in an H(2)O(2)/NaOH/DMSO system.

@article{Yamaguchi1999FreeRS,
  title={Free radical scavenging activity of grape seed extract and antioxidants by electron spin resonance spectrometry in an H(2)O(2)/NaOH/DMSO system.},
  author={Fumio Yamaguchi and Yoshihiro Yoshimura and Hiroyuki Nakazawa and Toyohiko Ariga},
  journal={Journal of agricultural and food chemistry},
  year={1999},
  volume={47 7},
  pages={2544-8}
}
The scavenging effects of grape seed extract (GSE) on free radicals formed in an H(2)O(2)/NaOH/DMSO system were examined using a spin-trapping electron spin resonance (ESR) method and compared with other natural antioxidants, ascorbic acid, dl-alpha-tocopherol, and beta-carotene. GSE reduced greatly the ESR signal intensity of superoxide radical-5,5-dimethyl-1-pyrroline-N-oxide (DMPO) adducts. GSE also exhibited weak scavenging activity on hydroxyl radical and a little scavenging activity on… CONTINUE READING

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