In the research, harmful substances to oolong in Anxi were introduced and production environment, agricultural residual, heavy metal and rare earth ele-ments of oolong in Anxi were analyzed. Furthermore, the factors i...In the research, harmful substances to oolong in Anxi were introduced and production environment, agricultural residual, heavy metal and rare earth ele-ments of oolong in Anxi were analyzed. Furthermore, the factors influencing oolong quality were explored, and the control measures for guaranteeing oolong safety were proposed.展开更多
Phenolics,as the main bioactive compounds in tea,have been suggested to have potential in the prevention of various human diseases.However,little is known about phenolics and their bioactivity in Zhangping Narcissue t...Phenolics,as the main bioactive compounds in tea,have been suggested to have potential in the prevention of various human diseases.However,little is known about phenolics and their bioactivity in Zhangping Narcissue tea cake which is considered the most special kind of oolong tea.To unveil its bioactivity,three phenolic-enriched extracts were obtained from Zhangping Narcissue tea cake using ethyl acetate,n-butanol,and water.Their main chemical compositions and in vitro bioactivity were analyzed by high-performance liquid chromatography(HPLC)and ultraperformance liquid chromatography-mass spectrometry(UPLC-MS).The ethyl acetate fraction(ZEF)consisted of higher content of phenolics,flavonoids,procyanidins,and catechin monomers(including epigallocatechin gallate(EGCG),epicatechin gallate(ECG),and gallocatechin gallate(GCG))than n-butanol fraction(ZBF)and water fraction(ZWF).ZEF exhibited the strongest antioxidant capacity in vitro due to its abundant bioactive compounds.This was validated by Pearson correlation and hierarchical clustering analyses.ZEF also showed a remarkable inhibition on the growth,migration,and invasion of 4T1 murine breast cancer cells.展开更多
基金Foundation for Young Talents of Fujian Entry-Exit Inspection and Quarantine Bureau(FK2012-47)~~
文摘In the research, harmful substances to oolong in Anxi were introduced and production environment, agricultural residual, heavy metal and rare earth ele-ments of oolong in Anxi were analyzed. Furthermore, the factors influencing oolong quality were explored, and the control measures for guaranteeing oolong safety were proposed.
基金Project supported by the Science and Technology Department of Guangdong Province,China(No.2016B090918118)
文摘Phenolics,as the main bioactive compounds in tea,have been suggested to have potential in the prevention of various human diseases.However,little is known about phenolics and their bioactivity in Zhangping Narcissue tea cake which is considered the most special kind of oolong tea.To unveil its bioactivity,three phenolic-enriched extracts were obtained from Zhangping Narcissue tea cake using ethyl acetate,n-butanol,and water.Their main chemical compositions and in vitro bioactivity were analyzed by high-performance liquid chromatography(HPLC)and ultraperformance liquid chromatography-mass spectrometry(UPLC-MS).The ethyl acetate fraction(ZEF)consisted of higher content of phenolics,flavonoids,procyanidins,and catechin monomers(including epigallocatechin gallate(EGCG),epicatechin gallate(ECG),and gallocatechin gallate(GCG))than n-butanol fraction(ZBF)and water fraction(ZWF).ZEF exhibited the strongest antioxidant capacity in vitro due to its abundant bioactive compounds.This was validated by Pearson correlation and hierarchical clustering analyses.ZEF also showed a remarkable inhibition on the growth,migration,and invasion of 4T1 murine breast cancer cells.
