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- W2376832517 abstract "Objective To analyze the contents of total flavonoids and vitexin from Microcos paniculata L.in different seasons,and evaluate the effect of harvest time on its quality.Methods 12 samples collected from December 2010 to November 2011 from one population of Microcos paniculata L.in Tai′An village,Daba town,Yangdong County in Guangdong province.The contents of vitexin and total flavonoids were quantitatively analyzed by HPLC and spectrophotometry method based on Al(NO3)3-NaNO2-NaOH reaction system respectively.The radical-scavenging activity of the extracts were evaluated on DPPH model.Results The highest content of vitexin was 0.068 4% in April,while the lowest was 0.008 7% in October,and the average was(0.034 9±0.013 4)%.The highest content of total flavonoids was 16.9% in August,while the lowest one was 3.21% in March,and the average was(9.975±3.425)%.The minimum EC50 of the extract was 1.461 9×10-3 mg·mL-1 in September,while the maximum was 22.820 1×10-3 mg·mL-1 in April.Conclusion The contents of vitexin and total flavonoids in Microcos paniculata L.varied greatly with months,and the higher contents of vitexin and total flavonoids were observed in those harvested from April to August for this population." @default.
- W2376832517 created "2016-06-24" @default.
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- W2376832517 date "2013-01-01" @default.
- W2376832517 modified "2023-09-24" @default.
- W2376832517 title "Seasonal variation of total flavonoids and vitexin in Microcos paniculata L." @default.
- W2376832517 hasPublicationYear "2013" @default.
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