酸基

Tebufenpyrad, a new high effective pyrazoleamide acaricide , was synthesized from 1-methyl-3-ethyl-4-chloro-5-pyrazolecarbon acid and 4-t-butylbenzylamine, the raw material are propionyl pyruvic ethyl ester and 4-t-butyl benzylchloride.

吡螨胺是一种新型、高效的吡唑酰胺类杀螨剂，本文以中间体1-甲基-3-乙基-4-氯-5-吡唑甲酸和4-叔丁基苄胺合成，起始原料丙酰丙酮酸乙酯和4-叔丁基苄氯，总收率为61.23%。

Antioxidative activity of three naringin-metal complexes was characterized by applying methods of 1,1-diphenyl-2-picrylhydrazyl radical and thiobaribituric acid.

采用二苯代苦味肼基自由基法和硫代巴比妥酸法对3种柚皮苷-金属配合物的抗氧化活性进行了测定。

Previously Daljeet et al, using a 14CO2 quantification method, have demonstrated the generation of hydroxyl radical by arachidonic acid in platelets.

过去由Daljeet et al等人使用14CO2 quantification 技术研究指出，花生四烯酸能使血小板产生氢氧自由基，但其使用的是间接的方法测定自由基的含量。

The methods determing the groups in the modified starch have been developed, that is acidimetry for the basicity of acidified starch, complexing titration for the substitution degree of carboxymethyl starch, and heat paste titration and carbonyl process respectively for the carboxyl and nitrogen of oxidized starch.

建立了以酸碱滴定测定酸化淀粉的碱量、络合滴定法测定羧甲基淀粉的取代度、热糊滴定和羟胺法测定氧化淀粉中羧基及羰基、消化定氮测定阳离子淀粉等几种变性淀粉的基团分析方法。

Allylic co-monomers such as diallyl adipate and triallyl citrate also formed interesting co-polymers and ter-polymers with DAP.

烯丙基共同单体如烯丙基己二酸和 triallyl柠檬酸还形成了有趣的共同聚合物和相聚合物DAP。

This research utilized the method of organic synthesis, researching different amounts and positions of hydroxy-substituted benzoic acid and serotonin into amide reaction, so as to produce a series of polyhydroxy substituted N-benzoylserotonin derivatives (compound 1-10). Accordingly, this study conducts the following four tests. I. The activity of antioxidant and the experiment of ability to scavenge DPPH free radical, II. The ability of overall antioxidant—the activity of TEAC, III. The activity test of inhibit Tyrosinase, and IV. The study of absorbing UV / VIS Spectrophotometers. This study use trolox, arbutin, and octyl salicylate as the control groups, and to test the ability of anti-oxidation, the activity of inhibit Tyrosinase, and the ability of absorbing UV. This research ultimately intends to investigate the applied value of those compounds into cosmetics.

本研究主要利用有机合成的方法，将不同数量及不同位置的羟基取代苯甲酸化合物与色洛冬宁进行醯胺化反应后，得到一系列的多羟基取代之N-色洛冬宁苯甲醯胺衍生物（化合物1 ~ 10），进行四种不同活性测试方法：一、清除DPPH自由基能力抗氧化活性测试；二、总抗氧化能力活性测试；三、抑制酪胺酸酶活性美白测试；四、紫外线／可见光光谱仪吸收测试，并以水溶性维生素E、熊果素、水杨酸辛酯当作对照组，探讨其抗氧化能力、抑制酪胺酸酶的活性能力与吸收紫外线能力，再进一步探讨其应用於化妆品上的价值。

Recently, the cDNA encoding PTA1 has been cloned from activated Jurkat cells by Sherrington and show it to be a novel member of the immunoglobulin superfamity with the unusual structure of two V domains only. This result provided a fundamental base for further study on PTA1 functions and its ligand identification.

从核苷酸推导的氨基酸序列表明PTA1由334个氨基酸组成，先导序列18个氨基酸，成熟PTA1分子为316氨基酸，胞膜外区232个氨基酸有两个Ig样结构域，属于免疫球蛋白超家族成员，胞浆区59个氨基酸中，含有3个酪氨酸，6个丝氨酸和6个苏氨酸，有PKC和PTK作用的基序，这些特征都与PTA1分子的功能密切相关，因此PTA1 cDNA克隆成功为进一步深入研究PTA1分子的作用机理奠定了坚实的基础。

Western blot was used to examine the phosphorylation of NR2A in rat hippocampus. Results Both Src and Fyn antisense ODNs could decrease the phosphorylation of NR2A induced by cerebral ischemia/reperfusion, while administration of Src antisense ODNs had more suppressive effect on the phosphorylation of NR2A than Fyn antisense ODNs.

对NR2亚基有磷酸化调节作用的是Src家族酪氨酸蛋白激酶（Src family of protein tyrosine kinase， Src PTKs），这是一类膜结合的非受体酪氨酸蛋白激酶；现已知Src家族成员中Src、Fyn、Yes、Lyn、Lck在中枢神经系统中均有表达。

The liquefied Japanese cedar was blended with PMDI (poly-4, 4'-diphenylmethane diisocyanate), and adding water as a blowing agent, organosiloxane as a surfactant and dibutyl tin dilaurate as a catalyst to prepare the polyurethane foams. The effects of the kind and dosage of surfactant and the molar ratio of NCO/ for PMDI to liquefied Japanese cedar on the properties of PU foams were investigated.

Don； Japanese cedar进行液化处理，所得液化柳杉进一步与异氰酸酯PMDI混合，并添加水为发泡剂，有机矽氧烷为界面活性剂，二月桂酸二丁锡为催化剂制造聚胺基甲酸酯发泡体，探讨界面活性剂种类、添加量及PMDI与液化柳杉之NCO/莫耳比对所制造PU发泡体性质之影响。

The role of the oxidant Ce4 in these reactions seemed ambiguous as it could also act as a Lewis acid.

在这个反应中，由于Ce4作为氧化剂的同时又兼具Lewis酸的酸性，因此，在反应的探索过程中，我们一直无法确定到底是Lewis酸催化的离子反应还是电子转移引发的自由基反应接离子反应。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。