Antioxidant Activity of Maleoyl κ-Carrageenans with Different Molecular Weight

Abstract:

Two κ-carrageenan oligosaccharides were prepared by acidic degradation.Then the maleyol derivatives(MA、MB) with similar degree of substitution(0.44) were synthesized with maleyol anhydride,respectively.The products were characterized by FI-IR.Their antioxidant activities were evaluated by the scavenging of hydroxyl radical,1,1-diphenyl-2-picrylhrazyl radicals(DPPH) and reducing power.The results indicated that MA showed higher antioxidant activities than that of MB,the reason may be related to the molecular weight.