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Producing novel edible films from semi refined carrageenan (SRC) and ulvan polysaccharides for potential food applications.

Abstract：

:Edible films were developed from seaweed polysaccharides (Kappaphycus alvarezii and Ulva fasciata). The total extracted yield of semi refined carrageenan (SRC) and ulvan polysaccharide was 31.55%, and 28.86%, with total carbohydrate being 78.08% and 82.43% in SRC and ulvan polysaccharides. Results of viscometric studies revealed molecular weight to be 210kDa and 72kDa for SRC and ulvan polysaccharides. Proton NMR studies showed presence of anhydro-d-galactopyranose and glucosidic linkages in SRC, while ulvan polysaccharide had rhamnose-3-sulfate, glucosyl and β-d-glucuronic acid. Three different films developed from SRC and ulvan polysaccharides [SRC, ulvan polysaccharide and combination of SRC and ulvan polysaccharide films] with glycerol. FT-IR spectra confirmed functional group of all the edible films which corresponds with NMR results. Water vapor permeability of films indicated a range of 7.82 to 9.96×10-8gm-1s-1Pa-1 with high tensile strength varying between 36.78 and 49.12MPa. Results on antioxidant activity indicated a strong hydroxyl radical scavenging activity detected in ulvan polysaccharide based film, while metal ion chelating activity was higher in films with a combination of SRC and ulvan polysaccharides. Further, low molecular weight films had better antioxidant activity, while high molecular weight films possessed good mechanical properties.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Ramu Ganesan A,Shanmugam M,Bhat R

doi

10.1016/j.ijbiomac.2018.02.089

subject

Has Abstract

pub_date

2018-06-01 00:00:00

pages

1164-1170

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(17)33804-7

journal_volume

112

pub_type

杂志文章

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