查询词典 compounds

OBJECTIVE To investigate qacE-sull gene resistant to the quaternary ammonium compounds and sulphonamide compounds in Gram negative bacteria in order to provide the information of bacterial resistance to disinfectants.

目的检测革兰阴性菌中耐季铵盐消毒剂-磺胺复合物的qacE-sul1基因，为临床提供细菌对消毒剂的耐药信息。

Objective: To investigate qacE-sul1 gene of resistant to the Quaternary Ammonium Compounds and Sulphonamide Compounds in Gram negative bacterium in order to provide the information of bacterial resistance to disinfectants.

目的：检测革兰阴性菌中耐季铵盐消毒剂-磺胺复合物的qacE-sul1基因，为临床提供细菌对消毒剂的耐药信息。

This could be a fascinating method for the practical syntheses of chiral synthons as valuable building blocks and important medicinal intermediates.3.Series of novel optical pureγ-aryl-1H-1,2,4-triazole derivatives were designed and synthesized by using the chiral auxiliary(Oppolzer\'s sultam),and all these target compounds were structurally characterized by ~1H NMR,~(13)C NMR,MS and elemental analysis,at the same time,some representative compounds have been elucidated by X-ray diffraction analysis.

应用手性辅剂樟脑磺内酰胺的手性诱导作用，设计合成了一系列光学纯的γ-芳基-1H-1，2，4-三唑类衍生物，所有目标化合物都采用了~1H NMR、~(13)C NMR、MS和元素分析进行了结构表征，同时也获得了部分代表性化合物的晶体结构，进一步确证了化合物的结构。

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。

Temperature and 30 mL CO:. Under this condition, the highest ratio of rotenone can meet 0.359% counted with engineering calculation. For total compounds extraction. 6000psi. 70癈. 40mL and the ratio is 10.06%. For rotenone content in total compounds. 3000psi. 35 癈. lOmL and the high content percent is 7.59%. So when conducting SC-CO: extraction of Tephrosia vogelii.

非洲山毛豆的SC-CO_2萃取应根据萃取目的选用相应的工艺条件SC-CO_2萃取非洲山毛豆生产杀虫剂，应选用压力5000psi，温度45℃，流量30mL的工艺条件；(5)通过夹带剂对萃取效果的影响研究，结果表明加入夹带剂可显著影响非洲山毛豆的SC-CO_2萃取效果。

The studies was proceeded on the the supercritical CO2 extraction technique of rotenone from Tephrosia vogelii. The extraction influences of technology conditions were systematically groped, The research results were listed as follows:1 The analysis method applied in this paper has been proved to be suitable to technology research of the studies on the SC-CO: extraction technique of rotenone from Tephrosia vogelii. 3 indexes, extraction ratio of rotenone. extraction ratio of total compounds and rotenone content percent in total compounds weight, were carried out with HPLC quantitatively determination combined with the sample weight loss after extraction. With these 3 indexes. The extraction influences of technology conditions were evaluated by synthesis. Then the best technology conditions were ascertained for different extraction aims.2 The pretreatment of rough material should be needed before extraction. Comminuting the material to 0.28mm size is most fit to SC-CO: extraction.3 Firstly static extracting 20 min then turn to dynamic doing is the better extraction mode than other ones.4 The orthogonal experiment was conduct with 3 factors and 5 levers.

本论文通过对非洲山毛豆SC-CO_2萃取中影响萃取效果的工艺条件的研究，初步得出如下结果：(1)本论文中所采用的萃取效果评价方法适宜于非洲山毛豆中鱼藤酮的超临界流体萃取技术研究，该方法具体为：HPLC定量分析非洲山毛豆SC-CO_2萃取物中的鱼藤酮含量，再结合萃取前后处理样品的重量损失，得出鱼藤酮萃取率、萃取所得粗物质萃取率和粗物质中鱼藤酮含量三个参数，以此三个指标综合评价萃取条件对萃取效果的影响；(2)通过对原料粒度对萃取效果影响的研究，结果表明SC-CO_2萃取非洲山毛豆复叶中的鱼藤酮，原料粉碎成30目粒度叶粉时萃取效果较好；(3)通过对萃取方式与萃取效果之间关系的研究，结果表明SC-CO_2萃取非洲山毛豆中鱼藤酮应采用先静态后动态的萃取方式，静态萃取时间为20min；(4)通过温度、压力和CO_2流量三因素五水平的正交试验，结果表明温度是最主要的影响因素，压力因素对鱼藤酮萃取率的影响程度高于CO_2流量，而对于粗物质萃取率和粗物质中鱼藤酮含量CO_2流量因素高于压力。

The biomarker compounds include n-aldane, sterane and terpane, they obviously differ in terms of the chemical composition as reflected by their geochemical parameters :the CPI value, content of C17 and C18 compounds, the ratio between light hydrocarbons and heavy hydrocarbons, the conversion of configuration and the maturity.

由于它们所处的沉积环境和生源母质上的差异，反映在正构烷烃的CPI值、C_(17)和C_(18)的含量、轻重烃比值、化合物构型的转化、有机质的成熟度和17α-22，29，30-三降藿烷与18α-22，29，30-三降新藿烷的比值等地球化学参数上的差别。

Provided are carbide derived carbon materials prepared by thermochemically reacting carbide compounds and a halogen containing gas and extracting all atoms of the carbide compounds except carbon atoms, wherein the intensity ratios of the graphite G band at 1590 cm -1 to the disordered-induced D band at 1350 cm-1 are in the range of 0.3 through 5 when the carbide derived carbon is analyzed using Raman peak analysis, wherein the BET surface area of the carbide derived carbon is 1000 m 2 /g or more, wherein a weak peak or wide single peak of the graphite (002) surface is seen at 2 = 25 DEG when the carbide derived carbon is analyzed using X-ray diffractometry, and wherein the electron diffraction pattern of the carbide derived carbon is the halo pattern typical of amorphous carbon when the carbide derived carbon is analyzed using electron microscopy.

提供了得自碳化物的碳，其通过热化学反应碳化物化合物和含卤族元素的气体并提取除了碳原子之外的碳化物化合物的全部原子制备，其中当使用拉曼峰分析法分析该得自碳化物的碳时，在1590cm -1 的石墨G波段与在1350cm -1 的无序引发的D波段的强度比为0.3至5，其中该得自碳化物的碳的BET表面积是1000m 2 /g或更大，其中当使用X射线衍射法分析该得自碳化物的碳时，在2θ＝25°观察到石墨(002)面的弱峰或宽单峰，以及其中当使用电子显微法分析该得自碳化物的碳时，得自碳化物的碳的电子衍射图是代表无定形碳的晕图案。该发射体具有良好的均匀性和长寿命。可以使用比用于生产常规碳纳米管的方法更廉价的方法制备发射体。

Some thiadiazole compounds display excellent inhibitory activity against TMV, and at the same time, these compounds possessed some plant growth regulation activity.

此外，1，2，3-噻二唑类化合物对植物比较安全，并且有一定的植物生长调节活性，这一特点弥补了许多商品抗植物病毒药剂的不足。

The shape and size of the cluster can be adjusted.πconjugate aryl alkynyl thio ethers containing thiomethyl in the end are important compounds. We can use such compounds to get some functional molecules that have good assemblied effect, especially in controlling the shape and the size of the cluster.

设计并合成一些形态多样的π共轭系多-SCH_3功能基的芳炔硫醚类分子对获得一些具有良好组装效果，尤其是能够控制团簇形态或控制团簇尺度有用的功能分子有着重要的理论和实际意义。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。