波谱

Their structures were elucidated on the basis of detailed spectroscopic analysis and chemical methods.

通过详细的波谱学分析及化学方法，对分离到的化合物进行结构鉴定，其中有6个新化合物。

The 1HMRS indexes at genu and splenium of corpus callosum, and basal ganglia could serve as effective indexes for the diagnosis of DAI.

胼胝体膝部、压部和基底核各氢质子MR波谱指标可作为弥漫性轴索损伤有效的诊断指标。

On the basis of our research on Stellera chamaejasme L. and the literatures, the spectral and structural characteristics, the stereochemical researching methods, the distribution in the 3 subtribes of Thymeleaceae and chemotaxonomy of biflavonoids were concluded. We found that biflavonoids played a very important role in the chemotaxonomy of Thymelaeaceous plants.

通过对瑞香狼毒中双黄酮类化合物的研究，结合文献，总结了瑞香科中双黄酮类化合物的结构特点、波谱规律和立体化学研究方法；同时对双黄酮类化合物在瑞香科植物中的分布规律进行了总结，发现双黄酮类化合物在瑞香科的植物化学分类学方面具有重要作用。

Structures of seven compounds were elucidated mainly by the use of spectroscopic methods, especially by detailed analyses of 〓 and 〓 NMR spectra with the aid of 2D NMR spectroscopy including 〓 COSY,〓 COSY, HMQC, HMBC, COLOC, and MS techniques including EI-, CI-, SI-, ESI-MS and HR-EI-MS. Stereochemical structures of some of them were also determined on the basis of results of their NOEDS, NOESY and coupling relation.

利用现代的各种波谱学方法，特别是在确定未知化合物结构中起重要作用的各种NMR技术（-维〓、〓 NMR、DEPT、NOEDS和二维〓COSY、〓COSY、HMQC、HMBC、COLOC、NOESY谱等）和MS技术（EI-、CI-、SI-、ESI-MS及HR-EI-MS等），鉴定了这7个化合物的平面结构和部分立体结构。

Methods The target compounds were prepared by using Pechmann reaction under catalysis by sulphamic acid and microwave irradiation. All the structures were confirmed by IR, 1H-NMR spectra.

在微波辐射和氨基磺酸的催化作用下经Pechmann反应得到相应产物，其结构经IR、1H-NMR波谱确证。

Bycomprehensive use of phytochemical isolation methods, 37 compounds were isolated 5from the methnol-chloroform extract of P. telfairia, by methods of modern spectroscopy,six compounds' structures were elucidated, including 2 kinds of fatty acids, 2 kinds ofsterols and 2 kinds of are esters of sterol and fatty acids. Five of them were reported forthe first time on the chemical constituents' research of P. telfairia. Otherwise, weperformed GC-MS analysis of the volatile fraction in this extracts, the result revealedseveral constituents such as alkyl hydrocarbons and methyl esters of fatty acids.

综合利用各种植物化学分离手段，从海头红的甲醇-氯仿（1 ：1）提取物中分离到单体化合物 37 个，采用多种现代波谱技术手段鉴定了其中 6 个化合物的结构，包括 2 个脂肪酸类成分，2 个甾醇类成分，以及 2 个甾醇的脂肪酸酯，其中 5 个在海头红化学成分研究中为首次报道；另外还对该提取物的挥发性成分作了 GC-MS 分析，显示含有烷烃及脂肪酸甲酯等成分。

A series of polys based on pyromellitic dianhydride, biphenylyl tetracarboxylic dianhydride, thiodiphthalic dianhydride bis benzene dianhydride and oxydiphthalic dianhydride were prepared in different solvents.

以所合成的AB_2单体为原料，合成了一系粘度较低、溶解性良好，带端酚羟基、苯甲酰基、乙酰基、氰代苯基和苯酰苯亚胺基的芳香族超支化聚酰亚胺，通过核磁波谱、红外光谱分析和元素分析对其结构进行确证。

In chapter 3, 83 volatile chemical constituents have been identified from the petroleum ether extracted part of ethanol extract of Debregeasia longifolia Wedd., and the relative percentages of the compounds are determined by GC method. From the extract of trichloromethane and ethyl acetate, 8 compounds have been isolated.

第三章首次对长叶水麻乙醇提取物的石油醚萃取部分分离并鉴定出83种成分，并用毛细管气相色谱面积归一化法测定了各组分的相对百分含量；从氯仿和乙酸乙酯萃取部分分离得到了8种化合物，用波谱学方法鉴定了其中2种成分。

In this paper, we synthesized a series of new tripodal schiff base compounds and their transition mental ion complexes.

本文设计合成了一系列三脚架结构的含硫西佛碱及其与过渡金属离子的配合物，研究了它们的波谱性质并对其进行了生物杀菌活性研究。

The structures of the triterpene glycosides were elucidated based on spectral data, chemical reactions, and related references.

利用大孔树脂柱层析、正相硅胶柱层析、反相硅胶柱层析、Sephadex LH-20以及HPLC等层析手段，对一种辐肛参的皂苷类成分进行分离，应用波谱技术和化学方法，并结合文献对照，对所得的化合物进行结构鉴定。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。