[Studies on the antioxidant activities of leaves from Senecio argunensis].
OBJECTIVE
To study antioxidant activities of different extracts of Senecio argunensis.


METHODS
The antioxidant activities of S. argunensis extracts with acetoacetate, n-Butanol and water were detected by DPPH * free radical-scavenging method and beta-carotene/linoleic acid system.


RESULTS
The acetoacetate, n-Butanol and water extracts from S. argunensis eliminated DPPH * in dose-dependent manner, their EC50 values were 0.0198, 0.0219 and 0.092 mg/ml, respectively. The strength order of the antioxidant activities of the three parts in beta-carotene/linoleic acid system was acetoacetate, n-Butanol and water extracts.


CONCLUSIONS
The extracts of the three parts of S. argunensis all have antioxidant activities. Among these extracts, extracts with acetoacetate have the highest antioxidant activity.
Zhou
Yan-Juan
YJ
Key Laboratory of Ministry of Education for Medicinal Plant Resource and Natural Pharmaceutical Chemistry, Xi'an 710062, China. zyjuan2005@stu.snnu.edu.cn
Li
Cui-Qin
CQ
Wang
Zhe-Zhi
ZZ
D000090:Acetoacetates; D000975:Antioxidants / Q000494:pharmacology*; D019659:Asteraceae / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D016166:Free Radical Scavengers; D019787:Linoleic Acid; D010851:Picrates / Q000378:metabolism*; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry; D012997:Solvents; D019207:beta Carotene
D000090:Acetoacetates; D000975:Antioxidants; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010851:Picrates; D010936:Plant Extracts; D012997:Solvents; D019207:beta Carotene; C016635:acetoacetic acid; D019787:Linoleic Acid; C004931:1,1-diphenyl-2-picrylhydrazyl