甲醇

Said invention utilizes the control of sulfonation extent of polystyrene sulfoacid membrane and distribution of sulfoacid group to implement modification or polystyrene sulfoacid membrane, on the primise of that the protein conductivity of the membrane is not affected, the permeability of the methyl alcohol in the membrane is reduced, and the alcohol-resistance of membrane material is raised.

通过控制聚苯乙烯磺酸膜的磺化程度和磺酸基团的分布状况来对聚苯乙烯磺酸膜进行改性，在不影响膜的质子传导性能的前提下，降低了甲醇在膜内的渗透率，提高了膜材料的阻醇性能。

The present invention uses industrial polystyrene as raw material, under the protection of inert gas uses complex of acidylating agent and concentrated sulfuric acid as sulfonating agent to make sulfonation, and utilizes dector-blade casting process or other membrane-forming process to prepare polystyrene sulfoacid membrane with low sulfonation degree.

本发明涉及电化学的燃料电池技术，更具体是指低温直接甲醇燃料电池用聚苯乙烯磺酸膜及其制备方法。本发明是以工业级的聚苯乙烯为原料，在惰性气体保护下以酰化剂与浓硫酸的络合物作磺化剂，进行磺化，并通过流延法或者其它成膜方法制备低磺化度的聚苯乙烯磺酸膜。

Both of adsorption of VB〓 on sulphonic resin in Zn〓form from ethanol and caffeine on sulphonic resin in Cu〓 form from ethyl acetate is considerable, with saturation adsorption capacity 60 and 76mg/g respectively.

磺酸锌型树脂对乙醇中VB〓、磺酸铜型树脂对乙酸乙脂中咖啡因和丙烯酸铁型树脂对甲醇中的鞣酸均具较好的吸附性能，其静态饱和吸附量分别为60、76和34mg/g。

In the first part of the dissertation,the basic knowledge of methanol market、toluene oxidation technology、the clear electrochemical organic synthesis technology and the solid superacid were introduced and reviewed.

本文的第一部分对甲醇的市场概况、甲苯催化氧化技术概况、清洁的电化学有机合成技术概况以及固体超强酸概况进行了文献综述。

By using isopropyl benzene as the internal standard material, using Agilent 1100 HPLC, using methanol-acetonitrile-water as mobile phase ,using three-component grade elution program, the components that contain benzene such as TALD,PT,4-CBA,TA,BA,PX and internal standard material isopropyl benzene in liquid phase product was analysed. Shimazu6A GC was used to analyse the solvent acetic acid and internal standard material isopropyl benzne in liquid phase.

以异丙苯为内标物，应用Agilent1100高效液相色谱仪，用甲醇－乙腈－水为流动相，采用三元梯度洗脱程序分析液相产物中的含苯环组分对甲基苯甲醛、对甲基苯甲酸、对羧基苯甲醛、对苯二甲酸、苯甲酸、对二甲苯和内标物异丙苯，应用Shimazu6A气相色谱仪分析液相中的溶剂醋酸和内标物异丙苯。

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。

With the extraction efficiency of rotenone and total substance obtained as estimated index, the technology conditions of extracting rotenone from the leaves of Tephrosia vogelii were investigated by SFE-HPLC method.

采用超临界流体萃取反相高效液相色谱法，以鱼藤酮萃取率和萃取产物总得率为评价指标，研究提出非洲山毛豆 Tephrosia vogelii Hook.f中鱼藤酮的超临界流体萃取较优工艺条件为：萃取物料粒径30目，静态萃取20min，萃取温度45℃，压力27.58MPa，流体总流量30mL/g，萃取前向萃取池中加入3mL甲醇作夹带剂。

Pyrolytic methylation of G. biloba leaves in the injector at 300℃ in the presence of an organic alkali, tetramethylammonium hydroxide (TMAH, 25% methanol), allowed quantitative analysis of ginkgolic acids as their corresponding methyl derivatives.

银杏叶样品与衍生化试剂四甲基氢氧化铵（TMAH，25%甲醇溶液）同时进样，在300℃的进样口瞬间生成了银杏酸甲基衍生物，银杏叶中6种银杏酸得到很好的分离。

And to study its antitumor activities. MethodsThe active fraction of Thlaspi arvense linn was extracted and identified by nethanol-extraction,tart-Al2O3 colum chromatography,TLC and HPLC.

方法采用甲醇萃取、酸性氧化铝层析柱层析和谱图分析对寨卡有效部位进行分离提取和鉴定，采用S180荷瘤小鼠模型和CT-26荷瘤小鼠模型，探讨寨卡有效部位提取物的抗肿瘤活性。

In the original titrimetric solution, known as Karl Fischer Reagent, the sulfur dioxide and iodine are dissolved in pyridine and methanol.

在最初的滴定溶液里，已知的是卡尔费休试剂，二氧化硫和碘溶解在吡啶和甲醇中。

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。