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；

It has been approved that apple extracts has stronger scavenging abilities of DPPH ·.

通过试验证明苹果提取物具有较强的清除DPPH·自由基的能力。

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。

Some beans are efficient in OH -, O2 -, DPPH clearing ability and the corresponding reduction ability.

几种豆类均有一定的清除·oh、·o2 -、·dpph的能力和相应的还原能力。

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 paper focus on the estimation of antiolding and antidiseases abilities of the extract of broccoli with the method DPPH.

利用DPPH法对西兰花提取物的抗衰老、抗疾病能力进行了测定。

The main result is as follow: 1. Carried out the concentration of tea infusion clearance of DPPH free radical screening research.

主要结果如下：1。开展了茶汤清除DPPH自由基的浓度筛选研究。

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。

The antioxidant behavior of sorghum pigment on DPPH and oils and the related activity-structure relationships were investigated in this study.

研究了高梁红色素对自由基和不同种类油脂的抗氧化作用，并阐述了高梁红色素的抗氧化机理。

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。

Pecan different storage conditions by measuring the reducing power, DPPH scavenging rate and moisture content, explore the best pecan storage conditions.

通过测不同储藏条件山核桃的还原力，DPPH清除率和水分含量，探究最适山核桃储藏的条件。

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 anti-oxidative effect of hawthorn extracts origin from different process were study by using DPPH and pyrogallol autooxidation methods in this manuscript.

采用不同提取方法提取山楂活性成分，分别用DPPH法、邻苯三酚自氧化法测定了不同提取物的抗氧化作用。

Besides, the antioxidant capacity of yellow rice wine in vitro was studied by DPPH and salicylic acid method, the results showed that polyphenol substances h.

通过DPPH·法、水杨酸法及邻苯三酚法测定不同茶叶中多酚、多糖含量对自由基的清除作用的影响，对比研究八种茶叶的抗氧化能力。

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。