Producing novel edible films from semi refined carrageenan (SRC) and ulvan polysaccharides for potential food applications.
Int J Biol Macromol
; 112: 1164-1170, 2018 Jun.
Article
em En
| MEDLINE
| ID: mdl-29454950
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 ß-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.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polissacarídeos
/
Carragenina
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Alimentos
Idioma:
En
Revista:
Int J Biol Macromol
Ano de publicação:
2018
Tipo de documento:
Article