%0 Journal Article %A DI Xue-Ying %A WANG Yan %A XUE Yu %A YANG Guang %A YANG Guang-Xin %A ZHANG Li-Fan %T External Antioxidant Activity of Ethanol Extract from Pinus sylvestris var. mongolica %D 2019 %R 10.7525/j.issn.1673-5102.2019.03.016 %J Bulletin of Botanical Research %P 458-465 %V 39 %N 3 %X The ethanol extractantioxidant activity of cone, bark, leaf, xylem four parts of Pinus sylvestris var. mongolica was compared to provide theoretical basis for further exploitation and utilization of pine resources. P.sylvestris var. mongolica bark, leaves, cones, xylem four parts as raw material, the content of polyphenols and flavonoids in the ethanol extract of camphor was determined. Determination of the P.sylvestris var. mongolica ethanol extracts of polyphenols, flavonoids, and ascorbic acid(VC) is applied to make positive control evaluation of the extracts from different parts of total antioxidant capacity, total reducing power, diphenyl bitter acyl(DPPH·) cleaning ability, hydroxyl free radical(·OH) clear, super oxygen anion(O2·) remove the five indicators, evaluation of pine ethanol extractpolyphenols ofmongolica four parts in vitro antioxidant activity, draw standard curve. The results showed that:(1)mongolica polyphenols extracted from P.sylvestris var. mongolica bark showed strong antioxidant capacity, in relatively high concentrations and antioxidants(Vc) is smaller; The camphor pine polyphenols, extracted from camphor cones, also exhibit stronger restorative powers, even more than antioxidants(Vc); (2)P.sylvestris var. mongolica polyphenols extracted from which bark in diphenyl bitter acyl(DPPH·) cleaning ability, hydroxyl free radical(·OH) removal ability are the highest of the three, but no more than antioxidants(Vc) antioxidant capacity; (3)super oxygen anion(O2·) cleaning ability index, the clearance of all negative, shows that the method for determining the ultra oxygen anion(O2·) the clearance interference factors are unable to compare three size on this metric capability. Experimental results show that the polyphenols have strong antioxidant ability, which can be used as a natural antioxidant. %U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2019.03.016