四唑

The best result is obtained for the film of 1-ethyl-4-[5--1,3,4-oxadiazol-2-yl] pyridinium tetrafluoroborate.

在这些离子液体中，N-乙基-4-[5--1，3，4-噁唑-2-]吡啶四氟硼酸盐的摩擦学性能最好。

The influence of chain extender kind, content and reactive processing condition on molecular weight (averageM(subscript η) of recycled PET was studied carefully based on chain extenders of 2, 2'-Bis(2-oxazoline), Pyromellitic dianhydride and the mixture of the both during reactive extrusion processing.

分别使用双恶唑啉、均苯四酐及两者的混合物作为回收PET瓶的扩链剂，研究扩链剂的种类、扩链剂用量和反应挤出机加工工艺条件对PET产品相对分子质量

The literature about the synthesis of the ion exchange and chelating adsorbents used in the off-line separation and preconcentration of the noble metals and the development of the on-line microcolumn separation and preconcentration of the noble metals were reviewed. Four silica gel-based adsorbents with rhodanine, 2-mercaptopyrimidine, 2-mercaptothiazoline and isophenylthiourea as the functional groups were first synthesized and applied to the on-line separation and preconcentration of silver, gold, palladium and platinum for their FAAS determination.

本论文在回顾螯合吸附材料的合成及其在贵金属的离线和流动注射在线预浓集分离发展状况的基础上，首次合成了含罗丹宁、2-巯基嘧啶、2-巯基噻唑啉和异二苯基硫脲等四种以硅胶为载体的螯合吸附剂，并用于银、金、钯和铂的流动注射微填充柱在线预浓集分离、火焰原子吸收光谱分析。

Methods The cultured 3T3 -L1 cells were pretreated with naringin, and then MTT method was used to detect the proliferation of the cells, oil red O staining method and spectrophotography were applied to analyze the degree of differentiation.

培养3T3-L1细胞，并用不同浓度的柚皮苷进行干预，以四甲基偶氮唑盐法检测细胞增殖，用油红O染色和染色比色法分析脂肪细胞的分化程度。

The effects of FLLPS on the immunoactivity of mouse speen lymphocyte were studied in vitro or vivo by means of MTT.

采用四甲基偶氮唑盐比色分析法，对其多糖成分进行了小鼠体内外免疫活性观察。

After treated with CuAz, the hydrogen from phenolic hydroxyl group in lignin was replaced by Cu from treated solution, being N-Cu-O complex, or two of the ammonia ligands of the tetrammine complex were replaced by copper-oxygen bonding from hydroxyl, being Cu-N-lignin complex.

在铜唑防腐剂处理后，木质素上酚羟基的H可以被Cu取代，形成&N-Cu-O&形式的络合物；或者处理液中四氨络合物中的2个氨配体被羟基取代，形成芳香族-铜络合物。

In addition, we have discovered a new reaction, it is that Dy/SiCl_4 can promote imines to give imidazolidines and tetrasubstituted hydrazines.

Dy／SiCl_4体系具有另外一个重要特性，就是我们发现它能够促进亚胺一步生成五取代的咪唑烷和四取代的肼，这是用其它自由基或直接用稀土金属和亚胺反应无法得到的。

The pyrrole, oxazoles, pyridinones, quinolines, dibenzodiazepines, tetrahydrobenzoxazines and tetronic acids have been prepared from enaminones.

吡咯、唑烷、嘧啶酮、喹啉、二苯并二氮杂环类、四氢苯并噁嗪酮和特窗酸等都可以由烯胺酮类化合物制得。

In order to probe the existence of nonthermal microwave effects, four synthetic transformations (Diels-Alder cycloaddition, alkylation of triphenylphosphine and 1,2,4-triazole, direct amide bond formation) were reevaluated under both microwave dielectric heating and conventional thermal heating.

为了探测非能微波效应的存在，四种合成转化反应（Diels-Alder环加成、三苯基膦和1，2，4-三唑的烷基化、酰胺键的直接合成）在微波介电加热和传统热加热两种情况下的重新评价。

Trypan blue dye exclusion method and MTT assay were used to determine the uncytoxic dose ranges of PEA.

采用台盼蓝染色排除法及四甲基偶氮唑蓝法确定PFA对淋巴细胞的非毒性剂量范围。

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。