查询词典 radical

Antioxidant activity of Se-PC was investigated and compared with phycocyanin by using four different free radical scavenging assays, namely, trolox equivalent antioxidant capacity assay, DPPH free radical scavenging assay, superoxide anion scavenging assay and assay for erythrocyte hemolysis mediated by peroxyl free radicals .

通过含硒藻蓝蛋白与藻蓝蛋白对4种不同的自由基清除能力的比较，即总抗氧化能力、清除DPPH自由基、过氧化物阴离子和引发红细胞溶血的过氧化氢自由基能力测定，从而对含硒藻蓝蛋白的抗氧化活性进行评价。

The results of the ability of anti-oxidation scavenging DPPH free radical shows that polyhydroxy substituted N-benzoylserotonin derivatives (compound 1-10) have the generally better ability of anti-oxidation than control group, in which the IC50 of compound 1-10 ranges 8.75 to 18.02 μg/ml and the IC50 of trolox is 13.04 μg/ml. The abilities of anti-oxidation of compound 1, 4, 5, 7, and 10 are all better than the control group, trolox. Among all, compound 10 has the best ability of anti-oxidation (IC50 is 8.75 μg/ml). This study also discovers that the ability of scavenging DPPH free radical is strongly related to the number and the position of hydroxyl.

在清除DPPH自由基的抗氧化能力结果显示，相较於对照组水溶性维生素E之IC50值13.04 μg/ml，多羟基取代之N-色洛冬宁苯甲醯胺衍生物（化合物 1 ~ 10），皆具有相当不错的抗氧化能力，十种醯胺化合物的 IC50值介於8.75 ~ 18.02 μg/ml之间，化合物1、4、5、7、10的抗氧化能力效果皆优於对照组水溶性维生素E的IC50值，其中又以化合物10的效果最佳(IC50值8.75 μg/ml)，而清除DPPH自由基的能力发现与羟基的数量及其位置有关。

We studied the radical scavenge enzyme and radical metabolite lipid peroxide in vesical carcinoma tissue and the paracancerous tissue of 32 patients by Xantine Oxidase method and propiolaldehyde method.

应用黄嘌呤氧化酶法和丙二醛法对32例膀胱癌及其癌旁组织中自由基清除酶超氧化物歧化酶活性和自由基代谢产物过氧化脂质含量测定。

During the ESR study of the effects of oxLDL on the ESR signal intensity of hydroxyl radicals in collagen (2 μg/ml)-activated platelets, we found that incubation of human platelets with collagen produced a typical four-line hydroxyl radical signal and a long-lived g = 2.005 radical detectable by spin trapper 5,5-dimethyl-1 pyrroline N-oxide.

在研究oxLDL降低由collagen 〈2 μg/ml〉刺激血小板产生的氢氧自由基〈OH●〉的ESR讯号强度的同时，我们发现以DMPO当自由基捕捉剂，collagen除了刺激血小板产生一个四线的典型氢氧自由基之外，还产生一个长半衰期 g = 2.005的自由基。

ConclusionThe determination method of scavenging radical by EPR technology was direct and quick. Water-solubility components from Rosmarinus officinalis L. has good capability of scauenging hydroxyl radical.

结论EPR技术测定迷迭香水溶性成分清除·OH自由基性能直接快速，迷迭香水溶性成分具有良好的清除自由基活性。

New reactions found in this program include: photoinduced regioselective free radical addition to aromatic imines;photoinduced Dielse-Alder reactions of aromatic imines for synthesis of tetrahydroquinoline derivatives;Photoinduced radical cation mediated selective ring opening reaction of epoxides;Formation of novel macrocyclic crown ethers by photoinduced reaction of diazonaphthaquinones;photoinduced selective desilylation of silyl ethers.

用这种方法成功的发现了下列在有机合成中有意义的新反应：(1)光诱导产生的自由基正离子诱导的自由基对芳香亚胺的区域选择性加成反应；(2)用光诱导的芳香亚胺的Diels-Alder反应合成四氢喹啉衍生物；(3)经光诱导产生的自由基正离子基诱导的环氧化物选择性开环反应；（4）重氮萘酮在环醚中经光诱导反应形成新奇的大环冠醚；（5）硅醚的光诱导选择性脱硅基反应。

The free radical scavenging activity of four Lamiaceaeplants growing in Turkey, Stachys byzantina, Salviaviridis, S. multicaulis and Eremostachys laciniata wasdetermined using a stable DPPH free radical.

一 具去除自由基活性的4种唇形科植物生长在土耳其，绵羊水苏、丹参贻贝、长梗黄花稔和沙穗是确定可使用於稳定DPPH游离基。

Piperidine oxoammonium salts oxidize aromatic amines and N, S-containing heterocycles to the corresponding radical cations, and the isotope effects in electron transfer reactions between thianthrene and N-methylphenothiazine radical cations and their respective neutral parent molecules have been reported for the first time.

啶氧铵盐氧化芳95胺和含氮、硫芳杂环为相应的自由基正离子，首次报道了及甲基吩自由基正离子与其中性母体之间电子转移的同位素效应。

Piperidine oxoammonium salts oxidize aromatic amines and N, S-containing heterocycles to the corresponding radical cations, and the isotope effects in electron transfer reactions between thianthrene and N-methylphenothiazine radical cations and their respective neutral parent molecules have been reported for the first time.

哌啶氧铵盐氧化芳香胺和含氮、硫芳杂环为相应的自由基正离子，首次报道了噻蒽及甲基吩噻嗪自由基正离子与其中性母体之间电子转移的同位素效应。

Radical abdominal trachelectomy can be successfully performed by any gynecologic oncologist who is trained in radical pelvic surgery.

根治性经腹宫颈切除术对于接受过基本盆腔手术的妇科肿瘤医生来说易如反掌

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。