Method: Free radical scavenging was assayed by DPPH method;
方法：DPPH法测定样品对自由基的清除作用；
The antioxidant activities of compounds were evaluated by DPPH free radical scavenging assay.
进一步采用清除DPPH自由基能力的方法测定红花提取物的抗氧化能力。
The free radical scavenging effects of celery extracts were determined by chemiluminescent and DPPH · method.
分别采用化学发光法和DPPH·法测定芹菜提取物清除自由基作用。
ConclusionThe extract has good scavenging effect on DPPH ·, OH · and O2 - · under the condition of experiment.
结论在实验条件下，缬草醚酯提取物对DPPH自由基、羟自由基、超氧阴离子有较好的抑制作用。
The antioxidant test found that the total phenolic, flavonoids and DPPH scavenging ability is higher with in the leaves.
在抗氧化能力方面可发现，总酚类、总类黄酮和DPPH 自由基的清除能力皆以叶 部为最高。
The antioxidant activities of each extract from two Juncaceae plants were determined by using DPPH free radical scavenging method.
采用DPPH法对两种灯心草属植物不同溶剂提取物进行抗氧化活性研究。
The scavenging capacities on DPPH radical and antioxidative activities to lard oil of the acidolysis products were improved obviously.
酸解产物清除DPPH自由基的能力和对猪油的抗氧化作用均有明显提高。
The effects of iron level in diatomite and pH value of beer on antioxidative activity of beer is studied in this paper by DPPH-spectroscopy.
本文采用DPPH 分光光度法，研究了硅藻土的铁离子含量和啤酒pH值在过滤阶段对啤酒抗氧化力的影响。
Objective: To establish a quality control method for fructus lycii based on its antioxidation scavenging 1, 1-diphenyl-2- picrylhydrazyl (DPPH).
目的：针对枸杞子的抗氧化作用，尝试建立基于清除有机自由基1，1-二苯基苦基苯肼（DPPH）的枸杞子质量控制方法。
RESULTS: In the DPPH system and the two chemiluminescence systems, Rhodiola ethanol-extract could significantly inhibit generation of free radicals.
结果：红景天醇提物对自由基的生成具有显著的抑制作用，呈现较为明显的剂量-效应关系；
Hydrolysable tannins showed much more effective antioxidant activity in DPPH assay while acetylated kaempferol glycosides displayed very low activity.
实验表明大多数水解单宁具有很高的抗氧化活性，而乙酰化的黄酮甙抗氧化活性很低。
Changes of the amount of total phenolic compounds, total flavones and percent of DPPH scavenging activity in different kinds of vinegar were analyzed.
总酚含量、总黄酮含量可作为评价食醋抗氧化性的指标，总酚含量、总黄酮含量、DPPH自由基清除率可作为鉴别不同品种食醋的指标。
For the active ingredient of Corydalis, active ingredients with DPPH free radicals scavenging activity and tyrosinase inhibitory activity were studied.
本实验对延胡索成分对DPPH自由基清除活性与酪氨酸酶抑制活性做了初步研究。
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 the total flavonoids in lotus leaves have strong capacity for scavenging DPPH free radical, and car effectively inhibit linoleic oxidation.
实验结果表明：荷叶黄酮具有良好的清除DPPH自由基的能力，能有效抑制亚油酸的氧化。
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。
The antioxidant activities of extracts from vinegar pickled garlic were determined by two methods: inhibition of lipid peroxidation and scavenging activity against DPPH.
采用DPPH法和抑制脂质过氧化法考察了醋蒜提取物的抗氧化活性。
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。
It was found that Fujian Yellow Rice Wine can inhibit the lipoperoxidation and the oxidation of TBA to some extent, which also has a scavenging effect on the DPPH radical.
结果表明：福建黄酒能在一定程度上抑制脂质过氧化反应和亚油酸的氧化，对DPPH自由基有一定的清除作用。
Folin-Ciocalteu method was used to determine the content of total phenols and the DPPH scavenging ability was detected to evaluate its antioxidant properties in this study.
并以Folin - Ciocalteu方法测定总酚含量，检测DPPH清除能力作为抗氧化活性的评估的方法。
Abstract : This study screened the most suitable prolease of preparation of bioactive peptide with the indexes of Hydrolysis (DH%) and the eliminating rate of DPPH free radical.
摘要 ： 以水解度（DH%）和对DPPH自由基清除率为指标，筛选出制备米糠蛋白抗氧化活性肽的最适蛋白酶。
Glycoprotein on the organic free radical (DPPH) and hydroxyl radical scavenging effect significantly, and with the increase of concentration of PDGP, scavenging ability increased.
玉竹糖蛋白对有机自由基(DPPH)和羟基自由基有明显的清除作用，并且随着PDGP质量浓度的增加，清除能力增强。
The antioxidant activity of Limonium simens (Girard) Kuntze root extract was examined using various antioxidant assays, such as reducing power, DPPH assay, TEAC assay, lipid peroxidation.
利用不同的方法(还原能力、DPPH法、TEAC法和脂质体过氧化)评价了中华补血草根提取物的抗氧化活性，同时测定了其总酚、黄酮和原花青素的质量分数。
There is a significant positive relationship between flavonoid content, phenolic content and DPPH scavenging capacity, and their correlation coefficients are 0.886 and 0.841, respectively.
相关性研究表明，连翘叶的总黄酮、总酚酸含量与清除DPPH自由基能力均存在显著正相关关系，其相关系数分别为0.886,0.841。
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。
The antioxidation experiment results showed that the scavenging effects of the acetone extracts of grape seed on superoxide radical(O - · 2) and 1,1 Dipheny1 2 picry1 hydrazy1(DPPH·)are strong.
抗氧化实验表明，葡萄籽丙酮浸提液对超氧阴离子自由基（O- ·2）和1，1-二苯基-2-苦肼基自由基（DPPH·）均有较强的清除作用。
The antioxidant activity of flavonoid of the 4 kinds of tea flowers were studied by DPPH. The results indicated that all had the antioxidant activities and some of them were the same as 0.01 % BHT.
利用DPPH法对茶花提取液的抗氧化性测定结果表明，4种茶花都具有一定的抗氧化作用，且可与0.01% BHT的抗氧化能力相媲美。
The antioxidant activity of flavonoid of the 4 kinds of tea flowers were studied by DPPH. The results indicated that all had the antioxidant activities and some of them were the same as 0.01 % BHT.
利用DPPH法对茶花提取液的抗氧化性测定结果表明，4种茶花都具有一定的抗氧化作用，且可与0.01% BHT的抗氧化能力相媲美。
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