期刊
FOOD HYDROCOLLOIDS
卷 40, 期 -, 页码 128-137出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2014.02.013
关键词
Mastocarpus stellatus; Carrageenan; Seaweed extraction; Edible film; Pigment
资金
- Spanish Ministry of Science and Innovation, I+D+I National Plan [AGL2011-27607]
- Xunta of Galicia Sectorial program: PEME I+D E I+D SUMA
- JAE-Predoc CSIC scholarship
Four sequential aqueous extracts (M1 to M4) were obtained from Mastocarpus stellatus at different temperatures. M1 (extracted at 3 degrees C overnight) showed higher extraction yield and antioxidant activity than M2 (extracted at 45 degrees C for 45 min). Extracts M3 and M4, obtained both at 91 degrees C, were composed predominantly of a kappa/L-hybrid carrageenan. M4 contained higher protein proportion. Based on compositional and structural properties, four films were developed: FM3, FM4, FM3 + M4 and FM3 + M4 + M1. FM4 was green colored, more opaque, and water resistant, stronger and slightly less stretchable than FM3. The mixture of M3 and M4 for film development resulted in a film with intermediate characteristics. The addition of M1 to FM3 + M4 provided mainly proteins and sulfated compounds, resulting in a more water resistant film, with suitable mechanical properties in both tensile and puncture test, and much higher antioxidant activity. (C) 2014 Elsevier Ltd. All rights reserved.
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