等环的

More recently, however, Pryor et al. concluded that malonaldehyde arises, at least in part, from decomposition of prostaglandin-like endoperoxides produced during autoxidation of polyunsaturated fatty acids.

然而最近Pryor等人得出结论认为至少部分丙醛酸是在聚不饱和脂肪酸自氧化过程中产生的前列腺素状桥环过氧化物的分解产生的。

Based on the bioisosterism of malonate group with phosphate group, a series of barbiturate compounds and pyrazolidine-3, 5-dione compounds were designed and synthesized.

基于丙二酸是磷酸的生物电子等排体，我们设计了丙二酸的闭环结构的巴比妥酸及3，5-吡唑烷二酮类化合物。

Hebei Xinhui tape led the company's product is "Xinhui" brand conveyor belt-type conveyor belt of peace, including the width of the following types of specifications B1600mm ordinary cotton canvas conveyor belt, nylon conveyor belt, fire-retardant tape, heat-resistant conveyor belt , acid conveyor, oil conveyor belt, cold conveyor belt, as well as the ring-shaped belt, tread belt, the food belt, eleven major series such ashundreds of products.

河北鑫辉胶带公司的主导产品是"鑫辉"牌输送带和平型传送带，包括幅宽B1600mm以下各种规格的普通棉帆布输送带、尼龙输送带、阻燃带、耐热输送带、耐酸碱输送带、耐油输送带、耐寒输送带，以及环型带、花纹带、食品带、止水带等十一大系列上百种规格的产品。

UV and fluorescence spectrometry,〓H-NOESY charactered the non-covalent interaction between cinchonine and CDs in solution. The results indicated that the possible stoichiometry of complex formation is 1: 1 (guest: host ratio) and 2: 1 inclusion complexes coexistence simultaneously in solution.

用紫外光谱、荧光光谱、二维核磁共振等手段研究了辛可宁与β，γ-环糊精在溶液中的非共价作用，发现它们之间是以1：1结合以及2：1结合两种方式模式的方式存在的。

A ∞-semimodule over a ∞-semiring is introduced in this paper, based on which, the absorb subsemimodule and the congruence relation on a ∞-semimodule are proposed.

引入∞-半环上的∞-半模的概念，在此基础上引入吸收子半模以及∞-半模上的同余关系等概念，得到一些初步性质。

This paper is concerned with the analysis of cubic system's equivariant symmetric structure and the investigation of limit cycles bifurcation for several classes of equivariant cubic systems.

主要研究三次系统的等变对称结构以及不同结构的三次系统的极限环分枝行为。

Limit cycle flutter of a two-dimensional airfoil in cubic nonlinear aeroelastic system in incompressible flow is investigated.

引 言 在不可压缩流中的二元机翼是一个典型的自激振动的例子，在该系统中引入非线性项一般会产生如Hopf分岔，极限环颤振[1]，周期倍化及混沌等现象。

Bis(1,2,3,4-tetrahydroisoquinoline-2-ylmethyl) HBr salt (K2) guest has been synthesized from 1,2,3,4- tetrahydroisoquinoline and ethylenedibromide. The self-assembly interaction models of cucurbit[8]uril (Q[8]) with this synthetic guest have been investigated by using 1H NMR technique, single crystal X-ray diffraction determination and theoretic calculation method.

以用1，2，3，4-四氢喹啉和二溴乙烷合成的二(2-亚甲基-1，2，3，4-四氢异喹啉)的溴化氢酸盐为客体，八元瓜环为主体，利用1H NMR技术，单晶X射线衍射方法以及理论计算等方法，考察了两者的自组装模式。

Effects of different buffer pH, different 〓 concentration, et al. on the cyclization were studied.

研究了缓冲液的不同pH值，〓的不同浓度等对环化反应的影响。

The effects of various factors on the reaction were studied.It has been found that the optimum reaction conditions are that the amount of catalyst is 13.3% of the amount of cyclohexanol, the reaction time is 80 minutes and the reaction temperature is 200~210℃.

考察了催化剂用量、反应温度、反应时间等因素对脱水反应的影响，得出了其最佳的反应条件：催化剂用量为环己醇质量的13.3%，反应时间80 m in，油浴温度200~210℃。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。