衍生物

Aim To study the inhibitory effects of Elemene Piperazine on the proliferation of HeLa cells in vitro and the involed mechanisms.

目的研究榄香烯衍生物对人宫颈癌细胞HeLa体外增殖的抑制作用及其作用机制。

Objective: To evaluate the protective effect of Ligustrazine bisphenylmethyl piperazine derivatives on ECV-304 cells injured by hydrogen peroxide.

目的：研究川芎嗪二苯甲基哌嗪衍生物对ECV-304细胞氧化损伤的保护作用。

We have exchanged the methyl group of the piperazine ring at 3-position of rifapicin to other new groups.

我们主要是将连接在利福平3位上的哌嗪环末端氮上的甲基换成其它基团，这些新连接的基团都与一些最近报道的抗菌活性比较强的新化合物的结构中所包含的基团相似或相同，并测试了这些化合物抗结核杆菌的活性，结果显示了他们大部分都保持了与利福平相当的抗菌活性，其中衍生物81的抗菌活性是利福平的十倍，具有进一步开发的价值。

ABSTRACT］ Objective: To evaluate the protective effect of Ligustrazine bisphenylmethyl piperazine derivatives on ECV304 cells injured by hydrogen peroxide.

目的：研究川芎嗪二苯甲基哌嗪衍生物对ECV304细胞氧化损伤的保护作用。

Results: Ligustrazine bisphenylmethyl piperazine derivatives showed protective effects on ECV-304 cells injured by hydrogen peroxide, which were more effective than Ligustrazine.

结果：川芎嗪二苯甲基哌嗪衍生物具有对ECV-304细胞氧化损伤的保护作用，其活性比川芎嗪强。

The invention relates to a preparation method of chiral alpha-alkenyl-alpha'-alkyl piperidine and relative N-Cbz derivative and an application.

本发明涉及一种手性α-烯基-α'-烷基哌啶及其N-Cbz衍生物的制备方法和应用。

The piperidine and its ramification selected as raw material to synthesis α-aminonitriles were studied in detail firstly. The oxidation potentials of the amines were determined through the liner sweep voltammetry study.

首先详细研究了以哌啶及其衍生物作为合成原料，通过极化曲线法确定了其氧化电位，并首次发现了氧化电位与1H NMR的化学位移之间的相关性。

It studied that performance of extraction iron, plumbum of calix[4]arene and its derivatives by the means of TAS-986 spectrophotometer.

4用原子吸收研究了杯[4]芳烃及其衍生物对过渡金属离子铁、铅的萃取性能。

The critical wetting surface tensions and the polar component of surface tensions decrease with the increasing of lengths of hydrocarbon chains of derivatives.

得到了以下规律：颜料的临界润湿表面张力随着铜酞菁衍生物碳氢链长度的改变均有不同程度的下降；颜料的表面自由能、表面自由能的色散成分变化不大，而极性成分下降比较明显。

Calculated its molecular second-order polarizability β, and a comparative study on its pertinent derivatives is carried out.

计算了其分子二阶非线性光学系数β，并与相应的衍生物作了比较研究。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。