Journal of The Chilean Chemical Society | |
ULTRASOUND-ASSISTED EXTRACTION AND CHARACTERIZATION OF POLYSACCHARIDE FROM MARYLAND TOBACCO LEAVES | |
TIAN, ZHAOFU1  LI, XIAOLAN1  LIU, SHAOHUA1  XU, CHUNPING2  HE, PEIXIN2  | |
[1] China Tobacco Guangxi Industrial Co. Ltd, Nanning, China;Zhengzhou University of Light Industry, Henan, China | |
关键词: antioxidant activity; extraction; optimization; Maryland tobacco leaves; polysaccharide; | |
DOI : 10.4067/S0717-97072015000100001 | |
学科分类:化学(综合) | |
来源: Sociedad Chilena de Quimica | |
【 摘 要 】
Ultrasound-assisted extraction (UAE) of polysaccharide from Maryland tobacco leaves was studied by response surface methodology. Furthermore, the crude polysaccharide was purified and two components (Fr-I and Fr-II) were obtained. FT-IR spectral analysis of the purified polysaccharide revealed prominent characteristic groups. The monosaccharide composition analysis by gas chromatography-mass spectrometry (GC/MS) indicated the main composition between Fr-I and Fr-II was different. Furthermore, thermo gravimetric analysis (TGA) indicated the degradation temperature (Td) of the Fr-I (241 oC) was higher than those of Fr-II (216 oC). Detected by the pyrolysis gas chromatography-mass spectrometry (py-GC/MS), it was found that the main kinds of pyrolysis products from both Fr-I and Fr-II were similar. Finally, On the basis of hydroxyl and DPPH radical scavenging assay, Fr-II has stronger antioxidant activities than Fr-I. The thermal behavior and antioxidant activity might be attributed to the configuration of the chemical compositions.
【 授权许可】
Unknown
【 预 览 】
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