期刊
CARBOHYDRATE POLYMERS
卷 95, 期 1, 页码 262-271出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.03.007
关键词
Bamboo leaves; Hemicellulosic polysaccharides; Chemical structure
资金
- Natural Science Foundation of China [30960304, 21266022]
- National High Technology Research and Development Programme of China (863 Program) [2012AA021205-6]
- Research Programme of Sate Key Laboratory of Food Science and Technology, Nanchang University [SKLF-TS-201111]
Bamboo leaves are considered as an important source of bioactive molecules. In this work, leaves from young bamboo (Phyllostachys pubescens Mazel) aged 3 months were subjected to aqueous extraction and 2% NaOH solution extraction followed by precipitation in ethanol-water medium with different ethanol concentrations. The dissolved hemicellulosic polysaccharides presented a total recovery of 67.83% based on the total hemicellulose content in bamboo leaves. Chemical analysis of the fractions was performed by sugar composition analysis, Fourier-transform infrared spectrometry, and 1D nuclear magnetic resonance imaging. The results revealed that all polysaccharide fractions contained xylose, arabinose, glucose, galactose, ribose, and uronic acid. The polysaccharides from young bamboo leaves mainly consisted of arabinoxylans, arabinogalactans, and non-cellulosic beta-D-glucans having (1 -> 3)- and (1 -> 4)-glucosidic linkages. The content of these polysaccharides was found to vary among the fractions depending on the separation method. Finally, the thermal behavior was also discussed. (c) 2013 Elsevier Ltd. All rights reserved.
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