查询词典 derivative

In acidic solutions containing propargyl derivative inhibitors,the changes in electrochemical parameters and inhibition performance with inhibitor concentrations were investigated using electrochemical measurements.

发现在硫酸溶液中；双电层电容、电荷迁移电阻及缓蚀效率均随缓蚀剂浓度变化呈现极值行为。但是，这些参数在盐酸溶液中不存在极值行为。

Physical chemistry ; energetic materials ; theoretical study ; derivative of pyrazolo pyrazole ; structure and property ; detonation performance

物理化学；含能材料；理论研究；吡唑基[4； 3-c]吡唑环体系衍生物；结构和性质；爆轰性能

In this paper, we have investigated the development of organic-inorganic composite PR material, prepared a new organic-inorganic nanocomposite PR material of PVK-CdS/DMNPAT, characterized every component and tested it photorefractivty by two beam coupling experiment.The work of this paper includes mainly three parts as followed:(1) An azo dye DMNPP was prepared via reoxidation and coincidence reaction and its derivative DMNPAT was prepared by attaching a long methacrylate chain in DMNPP.

本学位论文分析了国内外有机无机复合光折变材料的研究现状，根据目前有机无机纳米复合光折变材料研究中存在的问题，依照有机无机纳米复合光折变材料各功能组分的基本要求设计并制备了PVK-CdS/DMNPAT的有机无机纳米复合光折变材料，对各组分的合成表征以及光折材料的光折变性能做了较系统的研究。

A new fullerene derivative containing energy-producing groups was prepared, and the reaction conditions affecting the yield were studied by the kroenecker method. The optimal reaction conditions with a 53.5% yield (based on consumed C60) are: 1:3:6 of molar ratio of C60 , o–nitrobenzaldehyde and sarcosine , 55℃ of reaction temperature, 12 h of reaction time, 40mL of toluene solvent.

利用N-甲基甘氨酸、邻-硝基苯甲醛和C60反应，合成分离出了含有硝基的新型富勒烯吡咯烷衍生物，通过正交试验对其工艺条件进行了研究，探讨了反应物剂量比、温度、时间和溶剂体积对产物产率的影响，得到了合成产物的最佳工艺条件：反应物剂量比为1：3：6、温度为55℃、反应时间为12h、溶剂甲苯体积为40mL，此时产物产率可达到53.5%（以消耗的C60计）。

Besides this,the other types of scrotal skin flaps are derivative forms of the flapsmentioned above.

除此以外，其它类型的阴囊皮瓣切取方式，是上述四种方式的变化形式。

Part D. Melting Point of Semicarbazone Derivative

D部份。缩胺基脲衍生物的熔点测定

Because the limonene does not have a carbonyl group, the small amount of it which remainsin the carvone fraction will not form a semicarbazone derivative.

由于柠檬烯没有羧基，留在香芹酮馏份中少量的柠檬烯将不会产生缩胺基脲的衍生物。

Measure the optical rotation of the semicarbazone derivative solution in the polarimeter, following the procedure outlined in the Techniques Manual.

用旋光仪测得缩胺基脲衍生物水溶液的旋光度。

The result shows that single linear regression model with the first derivative reflectance spectra in 683 nm can accurately predict SPAD values.

结果表明，684 nm处一阶微分光谱的线性回归模型可较好地预测油菜叶片的SPAD值，预测样本的相关系数达到0.801。

Notice that we had to use squiggly brackets to make the derivative.

必须使用花括弧来表示微分。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐