Int J Biol Macromol. 2009 Jul 1;45(1):22-6. Epub 2009 Apr 2.

Preparation of the different derivatives of the low-molecular-weight porphyran from Porphyra haitanensis and their antioxidant activities in vitro.

Zhang Z, Zhang Q, Wang J, Zhang H, Niu X, Li P.

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Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.

Abstract

Porphyran extracted from Porphyra haitanensis is a sulfated polysaccharide, which possesses excellent antioxidant activities. In this study, we prepared one low-molecular-weight porphyran and its sulfated, acetylated, phosphorylated and benzoylated derivatives. Their antioxidant activities were investigated including scavenging effect of superoxide, hydroxyl and 1,1-diphenyl-2-picrylhydrazyl radicals. The results of chemical analysis and FT-IR spectrums showed the modification was successful. And in addition, we found that certain derivative exhibited stronger antioxidant activity than low-molecular-weight porphyran. The benzoylated derivative showed the most excellent antioxidant activity in three assays, so this derivative needs to be attended to.

PMID:: 19447255; [PubMed - indexed for MEDLINE]

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