脲

The X-ray crystal structure reveals that thiourea coordinates with Pd via S atom,and the complex as a whole was in complete symmetry with palladium atom at the symmetry center of the plane square structure.

硫脲是有效反萃剂，从萃合物的晶体结构看出，硫脲通过S原子与Pd配位，萃合物以Pd原子为中心构成平面正方型结构。

Materials and methods:60 patients of mucopurulont cervicitis were randomized into two groups with 30 in each.

资料与方法：临床收集符合纳入标准的60例解脲脲原体感染黏液脓性宫颈炎患者作为研究对象，随机分成治疗组和对照组各30例。

Concanavalin A is immobilized on a pre-activated chitosan microspheres, and then oriented immobilization of urease is carried out based on the strong interaction between ConA and glycoprotein.

将戊二醛将伴刀豆球蛋白和壳聚糖载体交联，然后利用ConA与脲酶糖链的特异性结合作用，实现脲酶的定向固定化。

The enzyme activity in the chrysanthemum alp and couch grass is higher than the one in spruce forest.

总体上看，绣线菊茅草灌丛群落、茅草群落的过氧化氢酶、脲酶和蔗糖酶的酶活性均高于云杉针叶林群落；而云杉针叶林群落的过氧化氢酶活性很高，脲酶和蔗糖酶活性较低。

Chapter two 4-Hydroxybenzoic acid is connected with PEG6000 through defoliant DCC at rooom temperature, then the product is refluxed with chloroacetic acid in acetone to afford PEG-bound phenyloxyacetic acid, which is reacted with thionyl chloride, ammonium thiocyanate and arylamines in turn to give PEG-bound disubstituded thioureas. After the cleavage with sodium methoxide in methanol, the eleven disubstituted thioureas are obtained.

第二章 利用PEG6000作载体，通过脱水剂DCC在室温下将对羟基苯甲酸以酯键连接在PEG6000上，再与氯乙酸在较温和的条件下生成PEG6000支载的芳氧乙酸，然后，依次与亚硫酰氯、硫氰酸铵、芳胺反应，生成PEG6000支载的硫脲，最后用甲醇钠的甲醇溶液切割PEG，得到了十一种1，3-二取代硫脲。

At first, RNase A was denatured by urea and dithiothreitol. Effect of strong denaturant urea and DTT on enzyme activity and free thiol number was investigated.

首先利用脲和DTT作为变性剂，研究了脲和DTT浓度对RNase A的酶活和自由巯基的影响规律。

These two isolates presented typical characteristics of Streptococcus iniae with gram-positive cocci in chains, catalase negative and beta-hemolytic, growth under 10℃ and non-growth up 45 ℃, hydrolyzation of esculin and arginine, Voges-Proskauer, urease, and hippurate tests negative, fermentation of glucose, salicin, sucrose and starch, non-fermentation of arabinose, inulin, lactose, melibiose, raffinose and sorbitol.

实验结果表明，两菌株具有典型的海豚链球菌特性：在显微镜下为球形细胞，呈长短不一的链状排列，革兰氏染色阳性：在血琼脂平板上显示β溶血；1O℃生长，45℃不生长；接触酶阴性；水解七叶苷、精氨酸，VP试验、脲酶和马脲酸试验阴性；发酵葡萄糖、水杨苷、蔗糖和淀粉，不发酵阿拉伯糖、菊糖、乳糖、蜜二糖、棉子糖和山梨醇等。

When 500 g/L iprodione was applied on greengrocery by 1000 times, the original residues were 41.04 mg/kg at open field and 33.15 mg/kg in greenhouse. Fourteen days after spraying, the residues were 1.34 mg/kg and 1.53 mg/kg at open field and in greenhouse, with half-lives of 1.98 and 2.45 days, respectively.

喷施500 g/L的异菌脲悬浮剂1 000倍后，异菌脲在露地青菜上原始沉积量为41.04 mg/kg，药后14 d残留量为1.34 mg/kg，消解率达到96.7%，半衰期为1.98 d，在大棚青菜上的原始沉积量为33.15 mg/kg，药后14 d残留量为1.53 mg/kg，消解率达到95.4%，半衰期为2.45 d，两者无明显差异。

The electrochemical property of PDT and PDT metal complexes were characterized by CV, from the result of CV, it can be found that PDT and PDT metal complexes possesses electrochemical activity, which arised from the heteroatom of molecules.

我们用循环伏安表征了对二苯甲醛缩氨基硫脲及其金属络合物的电化学性质，从循环伏安的结果来看，对二苯甲醛缩氨基硫脲及其金属络合物具有一定的电化学活性，并且这些电化学活性主要来自于分子中的杂原子。

Five novel molecular tweezers with hydrazide moiety as sidewalls were designed and synthesized,their structures and conformation was fully confirmed by single crystal X-ray diffraction.

合成了五个新型的基于二苯基甘脲和二乙基酯基甘脲的含有两个酰肼化合物边墙的分子钳，利用经典的手段如~3H NMR和~(13)C NYR以及单晶X-ray衍射等对它们进行了结构表征，分析鉴定。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。