衍生物

The mechanism of the interaction between bovine serum albumin and pyrano [4,3-b] pyran derivative, 2-amino-7-methyl-4-(4-nitrophenyl)-5-oxo-4,5-dihydropyrano [4,3-b] pyran-3-carbonitrile, was studied by means of fluorescence spectroscopy under physiological conditions.

用荧光光谱法分析了在生理条件下一种吡喃并[4，3-b]吡喃衍生物-2-氨基-7-甲基-4-(4-硝基苯)-5-氧代-4H，5H-吡喃并[4，3-b]吡喃-3-腈与牛血清白蛋白的作用机制。

Two bridged substituted styryl pyrazine derivatives have been synthesized in this work.

本工作合成了两种旋转受阻取代的苯乙烯基吡嗪衍生物。

Pyrazine derivatives have been synthesized. And the 3-keto glycosides can be employed to asymmetric synthesis.

并利用两种邻苯二胺与2-位氧化α-甲基D-葡萄糖苷反应合成了两种含糖吡嗪衍生物。

Using quantum chemistry ab initio HF and semiempirical ZINDO-SOS methods, electronic spectrum and third-order nonlinear optical coefficients of pyrazine and its derivatives were systematically investigated.

采用量子化学ab initio HF和半经验ZIND-SOS方法计算了吡嗪及其衍生物的电子光谱和三阶非线性光学系数。

In chapter 4,poly(thieno[3,4-b]pyrazine),poly(6H-pyrrolo[3,4-b]pyrazine), poly(furo[3,4-b]pyrazine),and their oligomers are studied.

在第五节中，我们分析了几种聚噻吩并[3，4-b]吡嗪的衍生物以及它们的多聚物。

In the second chapter, a series of pyridine derivatives are synthesized.

第二章，吡啶类衍生物的合成和表征，共合成了25种化合物，其中目标产物15种。

Its professionals are dedicated to the discovery of innovative pyridine derivatives, which are widely used as intermediates in the chemical and pharmaceutical industries.

公司的专业人员在各种吡啶类衍生物新产品的研制上做出了长期的努力，这类产品作为中间体广泛应用于精细化工和制药行业。

In this dissertation, Ir-catalyzed asymmetric hydrogenation of quinoline derivatives, pyridine derivatives and exocyclic enamines have been studied.

本论文研究了铱催化的喹啉和吡啶衍生物以及环外烯胺的不对称氢化。

Through the analysis of these issues come to the conclusion, on the theory of pyrrole and its derivatives have a certain reference value studies.

通过分析上述问题得出结论，对吡咯及其衍生物的理论研究有一定参考价值。

Pyrrole and its derivatives is an important chemical raw materials, its also the more theoretical research of concern in recent years.

吡咯及其衍生物是重要的化工原料，对其理论研究近年也愈受关注。

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％。