查询词典 free radical

NB can make liver, brain, spleen and nephridial tissue pathology damage, to refrain theactivity of liver mixed function oxidase, induce oxidative stress, effect tissue enzymatic activity,destroy organism antioxygen defence system and function of clean up free radical, to cause proteinoxidation damage, to educe toxic action.

综上所述，NB可以造成肝、脑、脾、肾组织的病理学损伤，抑制肝内混合功能氧化酶的活性，诱导氧化应激，影响组织酶活性，破坏机体抗氧化防御系统及清除自由基功能，引起机体蛋白质氧化损伤，进而发挥其毒性作用。

Results Both of them can effectively inhibit the aggregation of neutrophilic granulocytes and had some inhibiting effect on free-radical of oxygen,especially cimetidini.

结果：两者均能有效地抑制嗜中性粒细胞在肺内的聚集，对氧自由基的产生有一定抑制作用，西米替丁的作用更为明显。

In the second part of this study, skin and muscle fibroblasts were cultured from nine patients with chronic progressive external ophthalmoplegia syndrome for studying the relationship between mtDNA mutation and free radical scavenging enzymes. The skin and muscle fibroblasts from these CPEO patients carried different mtDNA mutations at different levels.

因此，我针对CPEO病人的皮肤和肌纤维母细胞的mtDNA突变和氧化性损伤进行分析，我以南方墨渍法分析皮肤和肌肉纤维母细胞的DNA，发现这9位病人所含的mtDNA突变差异性极大，有4，977 bp、 4，366 bp、 6，190 bp、约10 kb的大片段mtDNA断损突变和粒线体tRNALeu基因的A3243G点突变。

Polystyrene-MMT nanocomposites were prepared by free radical polymerization of styrene containing dispersed clay. The organophilic MMT particles were easily dispersed and swollen in styrene monomer.

采用双－苯基二甲基十八烷基溴化铵作为有机插层剂对钠基蒙脱土进行了有机化处理，该有机化的蒙脱土粒子在苯乙烯单体中很容易地均匀分散并形成稳定的胶体溶液。

Based on relative literatures,this part has included five resesearch aspects as below.1 Fifteen compounds were isolated and purified by extraction,column chromatography,and their structures were determined on the basis of spectral analysis: acteoside(Ⅰ-1),isoacteoside(Ⅰ-2),crenatoside(Ⅰ-3),cistanoside F(Ⅰ-4),sinapoyl-4-O-β-D-glucoside(Ⅰ-5),adenosine(Ⅰ-6),β-siterol(Ⅰ-7),oleanic acid(Ⅰ-8), succinic acid(Ⅰ-9),caffeic acid(Ⅰ-10),protocatechuic aldehyde(Ⅰ-11),p-hydro xybenzyl alcohol(Ⅰ-12),β-daucosterol(Ⅰ-13),D-galacitol(Ⅰ-14),D-mannitol(Ⅰ-15).Ⅰ-4～15 were obtained from this plant for the first time,andⅠ-6,7,9,and 13 were isolated from Orobanche genus for the first time.2 The scavenging test of DPPH showed that most compounds have comparative antioxidant activity as L-ascorbic acid and part of them show better activity such as the O.coerulescens extract and phenylethanoid glycosides.Acteoside showed potent free radical scavenging effects with a median inhibition concentration of 25.6μg/ml.3 The anti-HBV activities of acteoside,isoacteoside and crenatoside were measured,and all of them showed suppressive activity on the expression of HBsAg and HBeAg in the HepG2.2.15 cell line.

本论文在文献调研基础上对紫花列当化学成分及生物活性进行了研究，并从免疫抗病毒角度探讨紫花列当中特征性成分类叶升麻苷的肝保护作用及其机制。1采用大孔树脂、硅胶和Sephadex LH-20等色谱技术对紫花列当进行系统的植物化学研究，从中分离得到19个化合物，利用UV和NMR等波谱手段及理化性质鉴定了其中的15个化合物，分别为类叶升麻苷(Ⅰ-1)、异类叶升麻苷(Ⅰ-2)、crenatoside(Ⅰ-3)、cistanoside F(Ⅰ-4)、sinapoyl-4-O-β-D-glucoside(Ⅰ-5)、腺苷(Ⅰ-6)、β-谷甾醇(Ⅰ-7)、齐墩果酸(Ⅰ-8)、琥珀酸(Ⅰ-9)、咖啡酸(Ⅰ-10)、原儿茶醛(Ⅰ-11)、对羟甲基苯甲酸(Ⅰ-12)、β-胡萝卜苷(Ⅰ-13)、D-半乳糖醇(Ⅰ-14)和甘露醇(Ⅰ-15除化合物Ⅰ-1、Ⅰ-2和Ⅰ-3外，其余化合物均为首次从该植物中分离得到。2)通过大孔树脂富集该药材有效部位苯乙醇总苷，并采用HPLC测得其所含特征性成分类叶升麻苷的含量可达80%以上。3DPPH自由基清除试验显示紫花列当提取物及其所含的苯乙醇苷类化合物均具有较好的抗氧化能力，其清除DPPH自由基能力接近于抗坏血酸。4采用卡介苗整体致敏、脂多糖离体攻击构建大鼠原代肝细胞免疫性损伤模型，在体外观察类叶升麻苷的保肝作用。

Then take the polysaccharide which withdraws as the raw material, did separately crystallized the purple method elimination hydroxyl free radical oxidability appraisal; In vivo law and in vitro law guarantee the wet appraisal.

然后以提取的多糖为原料，分别做了结晶紫法清除羟基自由基氧化性评价；体内法和体外法保湿评价。

Exercise ; free radical ; antioxidant ; oxygenic metabolism exercise

运动；自由基；抗氧化；有氧代谢运动

Anthocyanins are plant unique phenolic compounds derived from flavonoid biosynthetic pathway. The red cyanidins, orange pelargonidin, and purple-blue delphinidin are three major anthocyanins, which are reported to have anti-oxidative activity on lipid and scavenge activity on removing free radical.

花青素是植物所特有的多酚类化合物，也是类黄酮代谢路径所衍生的化合物，植物主要的花青素有紫红色的矢车菊素、橘红色的天竺葵素及蓝紫色的飞燕草素等三种，均为抗氧化物，可抑制脂质过氧化，并具有清除自由基的能力。

ObjectiveTo study the extracts from Penthorum chinense Pursh on scavenging DPPH free radical.

目的研究赶黄草提取物对DPPH自由基的清除作用。

PERCA can real-time, on-line, contimuously determine the atmospheric free radical, also volume small, the movement cost is low, is widely applied in the atmospheric chemistry research.

PERCA能实时、在线、连续地测定大气过氧自由基，且体积小，运行成本低，被广泛应用于大气化学研究中。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。