EXTRACTIVES FROM GREEN HUSKS OF JUGLANS SIGILLATA AND THEIR ANTIOXIDANT ACTIVITY EVALUATION
Four secondary metabolites of phenolics, (+)-catechin (1), (-)-epicatechin (2), (+)-catechin (4α→8)-(+)-catechin (3), and 1,2,3,4,6-penta-O- galloyl-β-D-glucose (4) were isolated from the ethanolic extracts of Juglans sigillata Dode green husks by systematic Sephadex LH-20 open column chromatography and Thin Layer Chromatography. The structure elucidation and determination of the isolated compounds were based on physiochemical and spectroscopic methods, including 1H and 13C NMR, Positive FAB or MALDI-TOF MS analysis. The antioxidant activity of the ethanolic extracts, soluble fractions and isolated compounds was evaluated by DPPH free radical scavenging assay, and the results suggested that EtOAc, BuOH and H2O soluble fractions and compounds 1–4 exhibited significant activity compared with α-tocopherol and BHT which were used as positive controls.
Juglans sigillata dode extractives phenolic compounds green husks antioxidant activity
Xu Jie Si Chuanling Zhu Zhenyuan Lin Juan
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin,3004 Key Laboratory of Food Nutrition and Safety,Ministry of Education, Tianjin University of Science and College of Textiles, North Carolina State University,NC 27695, USA
国际会议
广州
英文
201-204
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）