期刊
FOOD CHEMISTRY
卷 216, 期 -, 页码 355-364出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.08.056
关键词
Watermelon rinds; Polysaccharides; ACE inhibitory activity; Antioxidant activities; Functional proprieties
资金
- Ministry of Higher Education, Scientific Research and Technology, Tunisia
In the present work, optimization of hot water extraction, structural characteristics, functional properties, and biological activities of polysaccharides extracted from watermelon rinds (WMRP) were investigated. The physicochemical characteristics and the monosaccharide composition of these polysaccharides were then determined using chemical composition analysis, Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) and gas chromatography-flame ionization detection (GC-FID). SEM images showed that extracted polysaccharides had a rough surface with many cavities. GC-FID results proved that galactose was the dominant sugar in the extracted polysaccharides, followed by arabinose, glucose, galacturonic acid, rhamnose, mannose, xylose and traces of glucuronic acid. The findings revealed that WMRP displayed excellent antihypertensive and antioxidant activities. Those polysaccharides had also a protection effect against hydroxyl radical-induced DNA damage. Functional properties of extracted polysaccharides were also evaluated. WMRP showed good interfacial dose-dependent proprieties. Overall, the results suggested that WMRP presents a promising natural source of antioxidants and antihypertensive agents. (C) 2016 Elsevier Ltd. All rights reserved.
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