Antioxidant activity of phlorotannins from brown algae  

作　　者：Xin Liu Wenqiao Yuan Ratna Sharma-Shivappa John van Zanten 

机构地区：[1]Department of Biological and Agricultural Engineering,North Carolina State University,Raleigh,NC 27695,USA [2]Golden LEAF Biomanufacturing Training&Education Center,North Carolina State University,Raleigh,NC 27695,USA

出　　处：《International Journal of Agricultural and Biological Engineering》2017年第6期184-191,共8页国际农业与生物工程学报（英文）

基　　金：This work was financially supported by the start-up fund of North Carolina State University.

摘　　要：The antioxidant activity of the phlorotannins extracted from five marine algaespecies(Saccharina latissima,Alaria esculenta,Laminaria digitata,Fucus vesiculosusand Ascophyllum nodosum)was studied.Three phlorotannin groups,including soluble,membrane-bound,and extracted membrane-bound phlorotannins obtained by two solvent extraction methods were investigated for their DPPH radical scavenging activity.F.vesiculosusand A.nodosumshowed the highest phlorotannin yield(14.83 mg-extract/g-algae and 12.80 mg-extract/g-algae,respectively)among the five algaespecies.Their soluble phlorophannin(SP),membrane-bound phlorotannin(MP)and extracted membrane-bound phlorotannin(eMP)extracts all showed equal or greater DPPH radical scavenging activity than the commercial antioxidants of butylated hydroxytoluene and ascorbic acid.The antioxidant potential that combines phlorotannin yield and antioxidant activity of the MP extracts of F.vesiculosusand A.nodosum(5890mL/g and 5278 mL/g algae,respectively)were higher than those of SP and eMP,suggesting that the MPs of F.vesiculosusand A.nodosumhad great potential to be used as antioxidants.Different extraction methods also showed significantly different effects on the antioxidant activity of the phlorotannin extracts.

关 键 词：brown algae PHLOROTANNIN antioxidant activity antioxidant BIOSEPARATION POLYPHENOL solvent extraction methods 

分 类 号：R28[医药卫生—中药学]