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Radical scavenging activity of hetero-chitooligosaccharides

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Abstract

Nine hetero-chitooligosaccharides (hetero-COSs) consisting of relatively high molecular weights (90-, 75-, and 50-HMWCOS), medium molecular weights (90-,75-, and 50-MMWCOS), and low molecular weights (90-, 75-, and 50-LMWCOS) were prepared from partially deacetylated hetero-chitosans (90%, 75%, and 50% deacetylated chitosan), and their antioxidant activity based on their scavenging potency on the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical was investigated. The results showed that the 90-MMWCOS, prepared from 90% deacetylated chitosan, showed the highest scavenging activity on the DPPH radical. Their scavenging pattern was dose- and time-dependent. Electron spin resonance (ESR) spectrum of DPPH treated with 90-MMWCOS decreased in a time-dependent manner and the reducing power of hetero-COSs increased in a dose-dependent manner. These results indicated that hetero-COSs have an antioxidant activity which is dependent on their degree of deacetylation and molecular weight.

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Acknoledgements

This work was supported by the Brain Korea 2.1 project in 2003.

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Authors and Affiliations

  1. Department of Chemistry, Pukyong National University, Busan 608–737, Korea

    Jae-Young Je, Pyo-Jam Park & Se-Kwon Kim

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  1. Jae-Young Je
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  2. Pyo-Jam Park
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  3. Se-Kwon Kim
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Correspondence to Se-Kwon Kim.

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Je, JY., Park, PJ. & Kim, SK. Radical scavenging activity of hetero-chitooligosaccharides. Eur Food Res Technol 219, 60–65 (2004). https://doi.org/10.1007/s00217-004-0881-x

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  • DOI: https://doi.org/10.1007/s00217-004-0881-x

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