羟基

In this reaction a lag period was discovered which may be resulted from isomerism of enol and ketone.

结果表明，2-羟基吡啶、4-羟基吡啶不能被酪氨酸酶氧化，也不是酪氨酸酶的抑制剂。

In some cases, its epimer 4 was also obtained. 22 compounds were synthesized, among them 18 were new.3. Using the intramolecular Pictet-Spengler reaction to form the pentacyclic skeleton of Et-743, the byproducts 25 were obtained under various conditions. The structures of them were determined to be 1, 2-dihydro-isoquinoline compounds, and the mechanism of the reaction was proposed.B. The synthesis of the analogs of Et-743Because of the failure of removing the protective groups in compounds 14, the synthetic strategy was adjusted.

对于苄基保护的羟基化合物13a，顺利得到化合物30，然后与不同的羧酸反应得到18个酯化合物33-50；对于苄氧羰基保护的氨基化合物13b，由于脱除保护基的化合物31在空气中不稳定，所以我们采取不经分离纯化，直接与羧酸反应得到酰胺化合物53-62，然后再分别对其C-21位的羰基进行还原氰基化，得到10个酰胺目标化合物63-72，另外，我们还对羟基转化为氨基的反应进行了探索。3。

The adsorption of the materials on both resins showed a favorable characteristic, and adsorption capacity increased with the increase of equilibrium concentration, and decreased with the increase of solution temperature.

本研究主要从吸附热力学和动力学方等方面就苯酚、水杨酸、对羟基苯甲酸和2，6-二羟基苯甲酸等有机物质在NDA-800和NDA-90超高交联吸附树脂上的吸附作用及传质过程进行了研究，以期为超高交联吸附树脂在该类精细化工生产废水治理与资源化中的应用提供一定理论基础。

A better understanding of the role of PPAR in insulin action system will be critical in developing more efficacious and safe agent s that act on PPAR and benefit patients with type 2 diabetes. The main content is followed: Synthesis and analysis of 1,3-dicarbonyl compounds. Make use of easily available cheap reagent such as 2-naphthol, 6-hydroxyquinoline, 1,2-dibromoethane, 4- hydroxybenzaldehyde, dimethyl malonate, 2-{4- [(2-napthoxy)ethoxyl] benzyl} malonates and 2-{4 [(1,2,3,4-tetrahydro-6 -quinolinoxy)ethoxyl] benzyl } malonates were synthesized through 6-8 steps in virtue of Williamson, Knoevenagel reaction, Pd/C catalyzed hydrogenation with mild conditions and high yield. The total yield of 40-50%.

本论文的主要内容和研究结果如下： 1，3-二羰基类化合物的合成及分析，采用2-萘酚、6-羟基喹啉、1 ，2二溴乙烷、对羟基苯甲醛、丙二酸二甲酯等常见易得试剂，利用Williamson反应、Knoevenagel反应、钯碳加氢等条件温和且收率高的方法，分别合成了2-{4- [(2-萘氧)乙氧基]苄基}丙二酸衍生物和2-{4 [(1，2，3，4-四氢-6-喹啉氧基)乙氧基]苄基}丙二酸衍生物两个系列8个化合物，经6-8步反应，总收率为40-50%，具有一定绿色化学特性。

An exterior angle of a wall or other piece of masonry.

任何含有除自身的羟基外其他羟基的酸。

With the increase of SiO_2 content, the tensile strength of silicone rubber foam increases and the compression set

当羟基硅油的含量达到6份以后，密度的变化趋于平缓。随着羟基硅油含量的增加，硅橡胶泡沫的拉

Glyceraldehyde, glycoladehyde, glycolic acid, and formaldehyde were identified as the intermediate products.

甘油光催化降解最终产物是H_2O和CO_2，检测到了甘油醛、羟基乙醛、羟基乙酸、甲醛等中间产物。

The effect of hydroxybutanedioic acid on the stability of monodispersed hematite sol was studied and the mechanism of coagulation is discussed.

研究了羟基酸系列之一的羟基丁二酸体系对α－Fe＿2O＿3单分散溶胶稳定性的影响，讨论了该体系的絮凝机理。

The method was based on the aromatic hydroxylation of terephthalate by hydroxyl radical, produced from the homolysis of peroxynitrite in weak acid media, to yield a highly fluorescent product, 2-hydroxy-terephthalate, which was then detected fluorimetrically.

具体做法是将ONOO〓在pH 5.0的缓冲液中转化为其共轭酸ONOOH，而ONOOH本身不稳定，均裂生成·OH，·OH进攻对苯二甲酸生成强荧光产物2-羟基对苯二甲酸，利用荧光分析法测定2-羟基对苯二甲酸，从而间接确定ONOO〓的含量。

There six chapters in this dissertation: the overview on the study of probing for reactive oxygen species, spin-labelled fluorophore as probe for free radicals, Fe -EDTA chelate-induced aromatic hydroxylation of terephthalate as a new method for the evaluation of hydroxyl radical-scavenging ability, study of fluorimetric method for the determination of peroxynitrite, study of spiro-formed rhodamine B hydrazide as a novel fluorescent probe in analytical chemistry, the conclusion and prospect of the present research work.

本论文分六章，包括生物活性氧表征的研究进展、自旋标记荧光探针表征自由基的研究、利用Fe-EDTA引发对苯二甲酸芳环羟基化反应评价抗氧化剂清除羟基自由基能力的研究、荧光法表征过氧亚硝酸根的研究、螺环型罗丹明B酰肼化合物作为新型荧光探针的性质及应用的研究、结论与展望。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。