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The as synthesized samples were characterized by XRD. The results show that a single phase compound Gd2Zr2O7 with a cubic pyrochlore structure is successfully synthesized at 5.2 GPa pressure and 1 873 K temperature with 30 min holding time.

通过XRD对合成样品进行了结构表征,结果证实,在5.2 GPa和1 873 K条件下,保温保压30 min,成功地合成出单一物相的、具有立方烧绿石结构的Gd2Zr2O7化合物。

For the first time we synthesized nanoscale metal hydrides of lanthanum, neodymium, samarium, dysprosium, and ytterbium with high efficiency under mild condition by complexometric catalysis instead of traditional preparation at high temperature and high pressure. It is for the first time that we synthesized lanthanide organic compounds with catalysts or initiating agents at atmosphere and ambient temperature,and some of them are new compounds. Nanometric lanthanide metal powders are prepared by thermal decomposition of the compounds in vacuum. Differently from the traditional method, size of the products prepared by our method is less than 40nm, and the activity of the reaction is very high. They are pyrophoric at atmosphere. They can make some reactions without activity or low activity show extremely high activity .We investigated influent regulations of methods, conditions to scale and special surface.

我们首次成功地用络合催化等方法取代需在高温高压下进行的传统方法,在温和条件下高效率地合成出纳米尺寸镧、钕、钐、镝、镱的金属氢化物;首次在常压常温的条件下,通过催化、引发等方法合成镧系金属有机化合物,再将其真空热分解成功地制备了纳米尺寸的镧、钕、钐、镝、镱等金属粉末;与传统方法不同,这些方法得到的产品基本颗粒尺寸小于 40 nm,遇到空气燃烧,具有极高的化学反应活性,使原来活性很低甚至观察不到活性的反应大幅度提高反应速率和产率;考察了制备方法、制备条件等因素对晶粒尺寸、比表面积大小等的影响规律。

the title compound was synthesized and its structure was studied in theory.the schiff base compound was synthesized by condensation of paeonol with furylfurylamine,then it was deoxidized by sodium borohydried.the energies,bound lengths,bound angles,the net charges of main atom and contributive percents of frontier orbital in the title compound have been calculated by software hyperchem 7.0 in half experience method.the yield rate of title compound was 65.6%.the result of calculation showed that the most of the bond lengths and angles in the system were in the the normal range,negative charge mainly concentrate on o1,o2,o3 and n1.the title compound behaves as quadridentate ligand.

目的合成标题化合物并对其结构进行了理论研究。方法以丹皮酚和糠胺为原料合成席夫碱,经硼氢化钠还原得标题化合物;使用hyperchem7.0程序,用半经验方法计算了化合物分子中能量分布、主要键长、键角以及主要原子的净电荷分布和前言轨道分布。结果标题化合物,收率65.6%;计算结果分析表明,分子中主要原子之间的键长、键角基本在正常的范围内;负电荷主要集中于o1,o2,o3和n1上。

Intermidiate 1, 2-propanediol-sebacate was synthesized with 1, 2-propanediol and sebacic acid, then a novel degradable elastomer, poly, was synthesized by melt phase polycondensation of 1, 2-propanediol-sebacate and citric acid under under certain conditions.

通过癸二酸与1,2-丙二醇反应,生成中间体癸二酸聚酯二元醇,然后将中间体与柠檬酸在一定条件下熔融缩聚制得了一种可降解弹性体聚癸二酸丙二醇柠檬酸酯。

The results show that in the case of {1 0 0}, the morphology of crystal changes from lowtemperature sheet to hightemperature tower with increasing the synthesized temperature, whereas in the case of {1 1 1} the change trend is contrary to {1 0 0}. When {1 1 1} facet or {1 1 1} was used as the growth facet, the sheetlike crystal is more difficult to incorporated for the metal inclusion regardless of synthesized temperature. With NiMnCo metal as solvent, large highquality gemgrade diamonds can also grow on {1 1 1} facet with proper temperature gradient.

结果表明:随着合成温度的升高,用{1 0 0}面生长出的晶体形貌由低温片状逐渐过渡到高温塔状,而用{1 1 1}面生长出的晶体形貌变化趋势则相反;采用籽晶{1 0 0}面或{1 1 1}面生长晶体,无论合成温度高低,包裹体都不容易进入片状晶体内部;只要存在合适的温度梯度,NiMnCo触媒同样适合利用籽晶{1 1 1}面生长优质大尺寸宝石级金刚石(≥4 mm)。

To further testify the high efficiency of these new reagents in the synthesis of sterically hindered peptides, we successfully synthesized the extensively -N-methylated peptide moiety of the antineoplastic and lipophilic depsipeptide Dolastatin 15 using reagent BEP and FEP. We also synthesized the highly hindered tetrapeptide segment of Cyclosporin A using reagent BEMT and BEP, respectively.

为进一步检验这类吡啶正离子型缩合剂在有空间位阻的多肽合成中的性能,我们以BEP和FEP为缩合剂,成功地合成了具有抗肿瘤活性的亲脂性酯肽Dolastatin 15分子中高N-烷基化的肽链部分;分别以BEMT和BEP为缩合剂合成了生物活性肽Cyclosporin A中空间位阻最大的四肽片断。

To economize cost of S03H-functionalized ionic liquids,extend their range of application in chemistry reaction,fifteen of ionic liquids have been synthesized by using methylimidazole,tri-alkylamine,pyridine with industrial materials 1,4-butane-sultone and 1,3-propane sultone as source in this paper.The ionic liquids were synthesized by tri-alkylamine have not been reported and yields are higher than 98%.

为了降低SO_3H-功能化离子液体的成本,使其应用范围更加广泛,本论文利用N-甲基咪唑、三烷基胺、吡啶和廉价工业级原料1,3-丙烷磺内酯、1,4-丁烷磺内酯为原料来源,合成十五种SO_3H-功能化离子液体,三甲胺为原料合成的SO_3H-功能化离子液体还未见文献报道,收率大于98%。

Four phenanthroline derivatives of 2-phenyl-imazole [5,6-f]-(1,10) phenanthroline, 2-(4-hydroxy-phenyl)-imazole [5,6-f]-(1,10) phenanthroline, 2-(4-methoxyl-phenyl)-imazole [5,6-f]-(1,10) phenanthroline and 2-(4-formacyl-phenyl)-imazole [5,6-f]-(1,10) phenanthroline were synthesized, and twelve new complexes of europium were then synthesized with these phenanthroline derivatives as the first ligand and butyric acid, n-heptanoic acid and tetradecanoic acid as the second ligand.

合成2-苯基咪唑并[5,6-f]邻菲咯啉,2-(4-苯酚)咪唑并[5,6-f]邻菲咯啉,2-(4-甲氧基苯基)咪唑并[5,6-f]邻菲咯啉和2-(4-甲酰基苯基)咪唑并[5,6-f]邻菲咯啉等4种邻菲咯啉衍生物,并分别以其为第一配体,选择丁酸,正庚酸和十四酸为第二配体合成12种新的铕-邻菲咯啉衍生物-脂肪酸荧光配合物。

Four phenanthroline derivatives of 2-phenyl-imazole [5, 6-f]-(1, 10) phenanthroline, 2-(4-hydroxy-phenyl)- imazole [5, 6-f]-(1, 10) phenanthroline, 2-(4-methoxyl-phenyl)-imazole [5, 6-f]-(1, 10) phenanthroline and 2-(4-formacyl -phenyl)-imazole [5, 6-f]-(1, 10) phenanthroline were synthesized, and twelve new complexes of europium were then synthesized with these phenanthroline derivatives as the first ligand and butyric acid, n-heptanoic acid and tetradecanoic acid as the second ligand.

摘 要:合成2-苯基咪唑并[5, 6-f]邻菲咯啉,2-(4-苯酚)咪唑并[5, 6-f]邻菲咯啉,2-(4-甲氧基苯基)咪唑并[5, 6-f]邻菲咯啉和2-(4-甲酰基苯基)咪唑并[5, 6-f]邻菲咯啉等4种邻菲咯啉衍生物,并分别以其为第一配体,选择丁酸,正庚酸和十四酸为第二配体合成12种新的铕-邻菲咯啉衍生物-脂肪酸荧光配合物。

The Limit Oxygen Index also can be raised from 16.5 to 22 and 23 respectively.The Octaphenyl POSS is synthesized via the hydrolysis and condensation of phenyltrichlorosilane (PhSiCl_3) and the subsequent rearrangement reaction catalyzed by tetramethylammonium hydroxide. Poly are easily synthesized from Ph-POSS via bromination with Br_2/Fe system.

以苯基三氯硅烷为起始原料,通过水解缩合、催化重排的办法制备了八聚苯基笼型倍半硅氧烷,在Fe粉催化条件下将溴元素引入Ph-POSS的苯环得到Br-POSS;使用该种Br-POSS和Sb_2O_3的混合物(3∶1,质量比)作为聚苯乙烯树脂的添加剂,采用熔融共混法制备(Br-POSS+Sb_2O_3)/PS复合材料。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。