Effects of ethanol concentration and reaction time were compared on DPPH free radical scavenging activity of egg white protein hydrolysates in this paper.
对比分析乙醇浓度和反应时间对四种蛋清蛋白酶解物清除DPPH自由基活性的影响情况。
The results show that all the extracts of Magnolia Officinal obtained with different extraction solvents have scavenging effects on DPPH radical and ethanol extracts show the highest activity.
结果表明：不同溶剂厚朴提取物对DPPH自由基均有清除作用，其中以乙醇提取物清除能力最强。
Hydrolysable tannins and myricetin derivatives possessed potent DPPH free radical scavenging activities, and only myricitrin showed weak tyrosinase- inhibiting activity.
结果显示水解单宁和杨梅素衍生物具有较强的自由基清除活性，杨梅苷显示出微弱的酪氨酸酶抑制活性。
Scavenging activity of four natural flavonoids to 2,2-diphenyl-1-picrylhydrzyl free radical(DPPH) was studied by cyclic voltammetry and differential pulse voltammetry.
采用循环伏安法、示差脉冲伏安法对四种天然黄酮类化合物清除二苯代苦味肼自由基（DPPH）的能力进行了探讨。
Scavenging activity of four natural flavonoids to 2,2-diphenyl-1-picrylhydrzyl free radical(DPPH) was studied by cyclic voltammetry and differential pulse voltammetry.
采用循环伏安法、示差脉冲伏安法对四种天然黄酮类化合物清除二苯代苦味肼自由基（DPPH）的能力进行了探讨。
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