抗氧化剂

The evaluation showed that this oil is better than the present vacuum pump oil in oil- water separativeness, oxidation stability, antirust and antifoaming properties, is suitable for lubricating machanismwhich steam is easy to get into its vacuum system.

用特定的原料油及工艺制成基础油，并添加评选出的粘度指数改进剂、抗乳化剂、抗氧化剂、防锈剂和减摩剂等凋合成耐水真空泵油。

The synthesis, types of antioxidant s and their antioxygenation mechanism were reviewed.

抗氧化剂被广泛应用于制药、功能化妆品等的生产、加工和贮藏过程中，其通过抑制生物机体活性氧簇的产生，或阻止其进一步链式氧化反应达到抗氧化目的。

The antioxygenic effects of DLTP,BHA, BHT and PG were compared and the synergistic effects of DLTP was also studied.

对DLTP与其他抗氧化剂进行抗氧化效能的比较，研究了DLTP的协同增效作用。

The free radical scavenging properties of six Aloe species are to be investigated in some modified chemical system. The antioxidant was purified by silica column and thin layer chromatography and analyzed by HPLC. A fraction was purified from A. brevifolia Mill showed the most effective scavenging activities on 〓 and ·OH (66. 01% and 38. 98% respectively). With the analysis of IR spectrum, UV spectrum and mass spectrum, the structure of FA was identifed as 8-C-D-glucopyranosyl-2- [2-hydroxy] propyl-5-methyl-7-hydroxychromone. Its scavenging activity on free radicals is higher than that of aloe-emodin. Its antioxidant activity may be due to the phenoxyl on glucosyl chromone which can be react with free radicals and form relatively stable free radicals.

本研究利用分别产生超氧阴离子自由基和羟自由基的化学模型体系研究比较了不同品种芦荟提取物的清除活性氧自由基的抗氧化作用，进一步利用硅胶柱结合薄层层析法和反相高压液相色谱法，从短叶芦荟叶子中首次分离了具有较强自由基清除能力（超氧阴离子自由基和羟自由基清除率分别为66.01％和38.98％）的成分FA，利用红外光谱、紫外光谱和质谱等仪器分析结果推断出该活性成分的分子结构为8-C-吡喃葡萄糖-2-[2-羟基]-丙基-5-甲基-7-羟基对氧萘酮，它的自由基清除能力高于芦荟大黄素，是一种天然抗氧化剂。

As evidenced by all kinds of antioxidants inhibiting the product of lipid peroxide and the electrophoretic mobility.

结果一定浓度的这五种抗氧化剂在8*！h内对LDL的氧化修饰均具有抑制作用，维生素E和硒的抗LDL氧化率？

But after 24 h,it was dosage depended,and had a random nonlinear relation.Conclusion In a certain scope of concentration,PMBE has no cytotoxity on HaCaT,and can be used in the selection of anti-inflammatory medicine for epidermic cells.

在随后的松皮、松针提取物鉴定中，发现其中含有大量的抗氧化剂———黄酮类化合物原花青素，它的抗氧化、清除自由基的能力是维生素C的20倍，维生素E的50倍[2，3]。

Considered to issue all sorts of antioxidant in 1300 ℃ and 1500 ℃ temperature, if Al, Si, SiC and B4C are opposite,magnesian carbon brick fights the action of oxidisability.

探究了在1300℃和1500℃温度下各种抗氧化剂，如Al、Si、SiC和B4C对镁碳砖抗氧化性的功能。

The concentration of volatile oil is higher, the reducing capability is stronger. Compared with common antioxidations, the antioxidant capacity of two species Michelia were stronger than that of PA, PG and Vc.

通过与常用抗氧化剂进行比较，发现两种含笑叶片挥发油的抗氧化能力均强于植酸PA、没食子酸丙酯PG和抗坏血酸Vc。

Three 5-(3'-indoyl)-oxazole compounds synthesized showed potent antioxidative effect and they would be a good antioxidants.

合成的目标化合物中有3个化合物有较好的抗氧化活性，有可能开发成为良好的抗氧化剂。

As a new antioxidant, Se plays a role in clearing oxygenic radicals, anti-oxidization, postponing the emergence of fatigue and decrease of apoptosis in movement muscle cells.

硒作为一种新型的抗氧化剂，在清除机体的氧自由基、抗氧化、延缓疲劳的出现和降低运动机体细胞凋亡率方面起一定的作用。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。