苯并

Unoxidated and oxidized wheat stalks were extracted sequentially with CS2, benzene, methanol, acetone and THF, and the extraction solutions were analyzed with GC/MS. The relative contents and compositions of fractional extracts of un-oxidized and oxidized wheat stalks were compared.

采用二硫化碳、苯、甲醇、丙酮和四氢呋喃对未氧化和氧化的麦秆进行分级萃取，比较麦秆各级萃取物的相对含量和组成差异，并对各级萃取物的组成进行GC/MS分析。

In order to reflect the catalyst deactivation during the oxidative polymerization and difference of the reactivity between monomer,the oligomer soluble in water,and the oligomer unsoluble in water,a new heterogeneous kinetic model was proposed according to Flory statistical theory.It was found that the polymerization rate estimated by the new model was consistent with the calculated data.

根据DMP氧化聚合过程中催化剂随时间延长而逐渐失活，不同种类的苯氧阴离子活性不同以及非均相聚合特点，提出了水介质中DMP氧化聚合动力学模型，并采用多元非线形回归计算得到模型参数，采用模型计算得到的聚合速率与实验测定值一致，证明所提出模型的正确性。

The costuslactone and dehydrocostuslactone in the supercritical CO 2 extract of aucklandia were identified by TLC using a mobile phase of petroleum ether,ethyl acetate and benzene (70∶5∶15) and the colour developing reagent of 5% vanillic aldehyde dissovled in sulfuric acid.

用薄层色谱法，以ψ(石油醚∶乙酸乙酯∶苯)=70∶5∶1 5为展开剂，质量分数为 5 %香草醛硫酸为显色剂对木香超临界萃取物中的木香烃内酯与去氢木香内酯进行鉴别；并建立高效液相色谱法同时测定木香烃内酯与去氢木香内酯的含量方法。

It was discussed in the paper the basic electroluminescent theory of polymers as well as the current study and the development trend of electroluminescent polymers and, especially that of polyphenylene vinylene. On this basis, the relationship among structure, solubility and electroluminescent properties was studied.

本文在讨论了电致发光聚合物的基本发光原理并深入分析了国内外有机电致发光聚合物尤其是聚苯撑乙烯的研究现状与发展趋势的基础上，着重研究了PPV衍生物的结构与它的可溶性以及电致发光特性的关系。

On the basis of the summarization and review on the researches and developments of the third-order optical nonlinear materials, the third-order optical nonlinearities of poly(l,4-phenylene vinylene) derivatives and metalloorganic compounds as well as the optical switching effects of poly(l,4-phenylene vinylene) derivatives are investigated.

在总结和回顾前人对三阶非线性光学材料研究的基础上，合成并研究了聚(1，4-苯亚乙烯)及其衍生物以及金属有机化合物的三阶光学非线性，同时对PPV及其衍生物的光开关特性进行了初步研究。

The physio- biochemical characterization,Biolog analysis and 16S rDNA molecular identification were performed.

本论文旨在考察1株新分离的Dyella属菌株LA-4对联苯的降解特性并对其代谢基因进行分子遗传学研究。

The method was validated for acetylated peptides and allowed an assessment of even the basal protein phosphorylation of phenylalanine hydroxylase in intact cells.

该方法被确证乙酰酶多肽，并允许在不完整细胞中对苯丙氨酸羟化酶的基本蛋白质磷酸化的评估。

The CAWs, graphite and mineral oil were directly mixed to make the CAW modified carbon paste electrode and the electrocatalysis of the modified electrode to hydroquinone was studied.

用直接混合法制备了碳原子线修饰碳糊电极，并研究了对苯二酚在该电极上的电化学行为。

C NMR, IR, GC MS and TG combined with some techniques including solvent extraction method, TPO and structure characterization were applied to determine the components of the deposit on the coked β zeolite catalyst after reaction for 8?000 h in pilot plant scale. It was shown that the composition of the deposit ...

用13CNMR ，IR ，GC MS ，TG等手段，并结合溶剂萃取法、TPO和结构分析等方法，确定了改性β沸石催化剂上沉积物的主要成分是多异丙基苯和四氢化萘，且主要分布在沸石孔道内；同时，快速升温后恒温烧炭的效果优于慢速升温后恒温烧炭的效果

The application results from fluorination showed microwave heating could accelerate chemical reactions markedly. The reaction time could be shortened 50% at least than that of conventional heating. The relationship between fluorinating agents\' structure and their activity was studied systematically. In addition, an anhydrous KF with higher activity was prepared by using expansion effect of microwave heating. As we known, solvents were very important to reaction. The comprehensive study showed some less polar aromatic solvents could be used as dipolar solvents. In addition, they had better effect than dipolar solvents in some occasions, such as fluorination of chlorobenzaldehydes and chlorinated diphenyl ketones etc. The primary applications of ionic liquids were also studied which indicated reactions with ionic liquids as solvents were more efficient and simple.

研究表明，微波是一种节能高效的加热方式，在微波作用下的卤素交换氟化反应具有反应速度快、转化率高、选择性好的优点，其反应时间可较常规加热缩短50%以上；同时也系统地研究了氟化剂种类及制备方式对其反应活性的影响，并利用微波加热的膨化作用制备出了一种活性较高的KF，其活性与喷雾干燥KF相差不大；溶剂对反应具有重要的作用，在此系统地研究了强极性非质子溶剂和中等极性非质子溶剂的应用情况，发现一些中等极性的非质子溶剂如硝基芳烃和氯代芳烃类溶剂在氯代苯甲醛类化合物的氟化反应中具有比强极性非质子溶剂更好的使用效果。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。