These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Antioxidant activity of N-carboxymethyl chitosan oligosaccharides.
    Author: Sun T, Yao Q, Zhou D, Mao F.
    Journal: Bioorg Med Chem Lett; 2008 Nov 01; 18(21):5774-6. PubMed ID: 18842408.
    Abstract:
    Three N-carboxymethyl chitosan oligosaccharides (N-CMCOSs) with different degrees of substitution (NA: 0.28, NB: 0.41, and NC: 0.54, respectively) were prepared by the control of the amount of glyoxylic acid in the etherification process of chitosan oligosaccharide (COS). Their antioxidant activities were evaluated by the scavenging of 1,1-diphenyl-2-picrylhrazyl radical (DPPH) radical, superoxide anion and determination of reducing power. With the increasing of substituting degree, the scavenging activity of N-CMCOSs against DPPH radical decreased and reducing power increased. As for superoxide anion scavenging, the order is NB>NC>NA. The difference may be related to the different radical scavenging mechanisms and donating effect of substituting carboxymethyl group.
    [Abstract] [Full Text] [Related] [New Search]