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Poly with sulfonic acid groups were readily synthesized with biphenol and 1,3-bis(4-fluorobenzoyl)benzene in the presence of excess potassium carbonate followed by sulfonation with chlorosulfonic acid.

以二氯二苯甲烷和2,6-二甲基苯酚为原料合成了含有阻碍基团的双酚单体,用此双酚单体和1,3-二(4-氟苯甲酰基苯)在无水碳酸钾存在的条件下反应制得聚芳醚酮,然后用氯磺酸磺化,控制反应条件,使磺酸基团恰好进入苯环对位,制得新型结构的磺化聚芳醚酮。

Intraoperative injection of anhydrous alcohol in inoperable pancreatic cancer;2. The long term results of injection anhydrous alcohol to treat bromidrosis and its standard protocol;3. Accordingly, it becomes the best choice in the production of anhydrous alcohol .

分子筛的晶体结构不同于硅胶、活性炭等,具有高吸附性,对H2O ,NH3,H2S,CO2 等高极性分子具有很高的亲和力,在相对湿度小于30 %时,分子筛的吸水量比硅胶和氧化铝都高得多,用其生产无水酒精是最佳方案,工艺流程分为:(1)两塔蒸馏加分子筛;(2)分子筛处理后在蒸馏塔回收;(3)分子筛处理后送专用塔浓缩。

Anhydrous magnesium chloride may be prepared from materials containing magnesium chloride such as magnesium chloride hydrate, carnallite or bittern by different dehydrating methods of organic solvent distillation or molecular sieve absorption, gas protective heating, discomposing the MgCl2-NH3 complex that can be composed from high boiling-point polar-solvent system...

无水氯化镁制备技术经历几十年不断的探索,取得了一些进步,但彻底改变耗能高、污染腐蚀严重、流程复杂的工艺过程,开发流程简单、低污染腐蚀、低成本的绿色工艺仍然需要更深入的研究。

The volume ratio of furaldehyde to acetic anhydride is 1∶2; the mole ratio of furaldehyde with anhydrous potassium carbonate is 1.00∶0.54. The best phase transfer catalyst is PEG1000, the mass ratio of PEG1000 with furaldehyde is 4.3%, the reaction time is 11 min, the reaction power of microwave is 260 W. The yield ofα-furanacrylicacid is up to 72.3% under these reaction conditions.

研究结果表明:在微波辐射功率为260 W、微波反应时间为11 min、以聚乙二醇1 000(PEG1000)为相转移催化剂,糠醛与乙酐的体积比为1∶2,糠醛与无水碳酸钾的量比为1.00∶0.55时,α-呋喃丙烯酸的产率为72.3%。

Methods: hPDLCs of passage four were treated with 0.1% absolute ethyl alcohol, 10^(-10)mol/Lor 10^(-7)mol/L E, in DMEM supplemented with 10% FBS, 10mM β-glycerophosphate and 5μg/ml ascorbic acid for 24 hours, 48 hours and 72 hours.

采用剂量对照设计,评价四代hPDLCs分别在含有0.1%无水乙醇、10^(-10)mol/L E2或10^(-7)mol/L E2的矿化诱导培养基中培养至72h,时间点的观察荧光定量RT-PCR检测RANKL和OPC mRNA的表达水平。

The mitochondrial cytochrome oxidase subunit Ⅰ gene fragments (682 bp) were amplified and cloned from two pure alcohol preserved Lingula anatina specimens collected from Qinhuangdao, northern China.

从河北秦皇岛采集的用无水乙醇保存的鸭嘴舌形贝样品中提取了DNA,经PCR扩增后进行克隆,得到了2条长度为682bp的线粒体细胞色素C氧化酶第Ⅰ亚基基因片段。

Drench:The marid''s touch puts out torches,campfires,exposed lanterns,and other open flames of nomagical origin if these are of Large size or smaller.

浸湿:水巨灵的触碰可以熄灭火炬、营火、曝露在外的灯火,以及其它大型或更小的非魔法且无保护的火焰。

The reactions catalyzed by the Lewis acids occupy an important place in organic synthesis, but these reactions are normally processing under strict moistureless conditions.

路易斯酸催化的反应在有机合成中占有重要的比重,但这些反应通常需要在严格的无水条件下进行。

The present invention discloses one kind of compound preparation comprising monopotassium glycyrrhizunate 20-75 weight portions, glycine 1-800 weight portions, L-cysteine hydrochloride 10-28 weight portions, and one or two of sodium chloride 10-30 weight portions, anhydrous sodium sulfite 10-28 weight portions and disodium edetate 1-9 weight portions.

本发明公开了一种含甘草酸单钾盐的复合制剂,由下述重量配比的组分制成:甘草酸单钾盐20-75份,甘氨酸1-800份,L-盐酸半胱氨酸10-28份,和氯化钠10-30份,无水亚硫酸钠10-28份,依地酸二钠1-9份中的一种或两种以上的混合。

The analysis of X-ray diffraction and scanning electron microscope energy dispersion spectra show that the primary hydrolysis products of antimony pentachloride and its hydrochloric acid solution are amorphous antimony oxide rather than SbO2Cl.

X射线衍射和扫描电镜能谱分析表明:五氯化锑及其盐酸溶液的初始水解产物不是SbO2Cl,而是一种非晶态锑氧化合物;随着水解母液酸度的降低,五氯化锑溶液水解产物陈化五天后的晶型由非晶态向晶态变化;五氯化锑溶液水解产物经无水乙醇洗涤后水解产物仍为非晶态,而经蒸馏水洗涤虽主要为非晶态,但有少部分结晶的Sb2O5·4H2O晶体存在。

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She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了,但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

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Several theories about reigniting and extinguishing of the arc have been refered.

本文综合考虑了几种电弧重燃和熄灭理论。