期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 118, 期 -, 页码 1073-1081出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.06.154
关键词
Nizimuddinia zanardini; Alginate; Polysaccharide; Antioxidant activity
Sodium alginate from Nizimuddinia zanardini (an Iranian brown algae) was extracted with acid and alkaline solutions, partially and totally hydrolyzed and analyzed for its biochemical composition. H-1 NMR spectroscopy, SEC-MALLS, HPAEC and FT-IR were performed to determine its structure and its physico-chemical properties. This alginate has a M/G ratio of 1.1, a molecular weight of 103 kDa, a polydispersity index of 1.22, and an intrinsic viscosity of 342 mL/g. Its antioxidant activity was tested by DPPH radical scavenging showing its potential for food preservation. Rheological properties of solutions of this alginate with concentrations between 1 and 5% (w/v) in water and 0.5 M NaCl were investigated indicating a Newtonian fluid type behaviour in water and a shear thinning fluid type behaviour in NaCl solutions. (C) 2018 Published by Elsevier B.V.
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