化合物

In this article, 1'-(2-hydroxyethyl)-3', 3'-dimethyl-6-nitriospiro (2H-1-benzopyran-2, 2'-indoline) was synthesized, and its absorption change by irradiation UV-vis as well as fluorescence spectral change was investigated.

本文合成了1'-羟乙基－3'，3'-二甲基吲哚啉－6-硝基螺吡喃，研究了该化合物在紫外－可见光交替照射下紫外吸收强度的变化，并测试了光照前后化合物的荧光光谱。

Results Eleven 2-substituted phenyl-5-(3'-indolyl)-oxazoles were prepared, the compounds 21 and 22 have shown antioxidative activity 3-4 times stronger than that of Vit E, and the compound 29 showed antioxidative activity almost as same as Vit E.

结果 合成了11个2-取代苯基－5-（3'-吲哚基）-恶唑衍生物，其中化合物21和22的活性比维生素E强约3~4倍；化合物29的活性与维生素E相近。

Chapter 6: Iodobenzene diacetate-mediated reactions of methylenecyclopropanes, vinylidenecyclopropanes and a methylenecyclobutane with phthalhydrazine give the corresponding [3+2] cycloaddition products in good yields under mild conditions. In these reactions, phthalhydrazine was transformed to a 1,3-dipole intermediate in the presence of iodobenzene diacetate. A plausible reaction mechanism has been proposed.

本论文对亚甲基环丙烷类化合物的一些化学反应性能进行了研究，发现了亚甲基环丙烷类化合物在不同试剂或不同催化剂作用下的一些新的化学转化并合成了一些结构简单但具有潜在应用价值的有机小分子。

ABSTRACT The ionic strength of mobile phase can significantly affect the peak shape of ionogenic compounds such as antibiotics in reversedphase high performance liquid chromatography. The influence may be attributed to overloading of ionogenic analytes in lower ionic strength mobile phase.

在反相高效液相色谱过程中，流动相的离子强度可显著影响可解离的化合物如抗生素的色谱峰形，原因在于流动相的离子强度较低时，色谱填料的固定相易于过载，使离子化的化合物的色谱峰形呈典型的过载特征――峰形接近直角三角形。

ABSTRACT The ionic strength of mobile phase can significantly affect the peak shape of ionogenic compounds such as antibiotics in reversedphase high performance liquid chromatography. The influence may be attributed to overloading of ionogenic analytes in lower ionic strength mobile phase. In such phase, peak becomes increasingly rightangled triangle in shape with increasing sample load together with increasing peak width and tailing.

在反相高效液相色谱过程中，流动相的离子强度可显著影响可解离的化合物如抗生素的色谱峰形，原因在于流动相的离子强度较低时，色谱填料的固定相易于过载，使离子化的化合物的色谱峰形呈典型的过载特征――峰形接近直角三角形。

ABSTRACT ionic strength of mobile phase can significantly affect the peak shape of ionogenic compounds such as antibiotics in reversedphase high performance liquid chromatography. The influence may be attributed to overloading of ionogenic analytes in lower ionic strength mobile phase. In such phase, peak becomes increasingly rightangled triangle in shape with increasing sample load together with increasing peak width and tailing.

在反相高效液相色谱过程中，流动相的离子强度可显著可解离的化合物如抗生素的色谱峰形，原因在于流动相的离子强度较低时，色谱填料的固定相易于过载，使离子化的化合物的色谱峰形呈典型的过载特征――峰形接近直角三角形。

Avicennin A, a new isocoumarin , was isolated from ethyl acetate extract of the mangrove endophytic fungus No.

2533号菌是从南海红树avicennia嫩叶获得的一种内生真菌，其代谢产物很丰富，从它的培养液中分离出很多有意义的化合物，其中异香豆素avicennin－A是新化合物，未见文献报道。

This project mainly exploratorily studied that polyurethane was produced via condensation reaction between polyhydroxylated compounds and methyl carbamate, which was firstly synthesized by dimethyl carbonate and amines. The process is a green route because it turns away the synthesis and the utilization of toxical isocyanic acid ester.

本项目主要探索性地研究了碳酸二甲酯和胺类化合物反应生成氨基甲酸甲酯，然后氨基甲酸甲酯再和多羟基化合物直接反应得到聚氨酯材料，从而避免了异氰酸酯的合成和使用。

In searching for novel and high active fungicides with pyridyl moiety, with Dimethomorph as a model compound and isonicotinic acid as the main starting material, twenty-seven title compounds were designed and synthesized through chlorination, Friedel-Crafts acylation, Wittig-Horner reaction and other steps. All the target structures were confirmed via 1H NMR and elementary analysis.

为了寻找具有高活性的含吡啶杂环杀菌剂，以烯酸吗啉为模板化合物，以异烟酸为起始原料，通过卤代反应、Friedel-Crafts酰基化反应、Wittig-Homer反应等，将吡啶－4-基或2-氯吡啶－4-基引入到模板结构中，设计合成了27个4-［3-（吡啶－4-基）－3-取代苯基丙烯酰］吗啉类化合物，其结构通过1H NMR和元素分析确证。

It was verified that photoinducedisomerization of isonitrile compound in condensed phase followed a free radical chainmechanism at room temperature.

再者，作者针对一系列脂肪烃基异腈化合物室温下在凝聚相中的光诱导异构化反应机理进行了探讨和论证，通过自旋捕捉ESR实验和GC产物分析证明室温下液相中异腈化合物的可见光诱导异构化反应遵循自由基链反应机制。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。