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溶解度

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A hydrate is formed when one or more water molecules combine with a drug molecule in crystal form.

这种的溶解度可能与非水合物的溶解度有明显的不同。

In this dissertation, we optimized the thinkness of each layer of TFEL devices using the layered optimization method to obtain ZnS: Ce〓 TFEL devices. Accoding to the energy level structure of Ce〓, two criteria for distinguishing the EL of Ce〓 were found out, from which it was conduded that the TFEL of ZnS: Ce〓 comes from 5d→4f transition of Ce〓. The measurement of brightness waveform showed that the TFEL of ZnS: Ce〓 was the luminescence from independent centers. and there were the field induced-delocalization in this process anf it〓s the cause of low TFEL efficiency of ZnS: Ce〓. In this dissertation, different influence factors on TFEL of ZnS: Ce〓 were sdudied. The influence of different host lattice is different: The blue/green ratio of ZnS: Ce〓 in hexagonal system of ZnS is larger than that in cubic system of ZnS, and the TFEL peaks in hexagonal system of ZnS moves toward longer wavelength compared with that in cubic system of ZnS. The adding buffer layer was used in this stage. The solubility of Ce〓 in ZnS was small and it was another limit to TFEL brightness of ZnS: Ce〓 device. The solubility of Ce〓 increased ten times when using Li ions as flux, so that the TFEL brightness of ZnS: Ce〓 was enhanced. It was found that the appearing of ZnO in active layer improves the TFEL of ZnS: Ce〓: the brightness and the wave range of ZnS: Ce〓TFEL were enhanced.

本文采用TFEL的分层优化方案,优化组合了各膜层厚度,选择最佳制备条件,得到了ZnS:Ce〓的TFEL;根据Ce〓的能级结构,找到了判别Ce〓的EL的两个简单依据,并据此断定ZnS:Ce〓的TFEL的两个发射峰分别属于Ce〓的〓和〓跃迁;亮度波形测量表明ZnS:Ce〓的TFEL属于分立中心发光,分析认为在此过程中存在着较严重的场致离化,这也是ZnS:Ce〓的TFEL效率较低的一个原因;本文考查了影响ZnS:Ce〓的TFEL的各种因素,发现:基质的晶体结构对ZnS:Ce〓的TFEL有所影响,在六角相ZnS中Ce〓的TFEL优于立方相ZnS中Ce〓的TFEL:发射峰的蓝-绿比相对较大,且光谱向短波方向移动,在此项研究中本文采用了在发光层前增镀过渡层的办法,过渡层为六角晶相的ZnO;限制ZnS:Ce〓的TFEL器件亮度的一个原因是Ce〓在ZnS中的溶解度低,本文用Li离子作助溶剂增大了Ce〓的溶解度,增大幅度为一个量级,并且ZnS:Ce〓的TFEL亮度明显提高;从ZnS:Ce〓的TFEL光谱来看ZnS:Ce〓的TFEL波长覆盖范围较小,亮度也不高,达不到做为白色TFEL材料的要求,需要寻找新的白色TFEL材料;在研究ZnS:Ce〓的TFEL中还发现:发光层中ZnO的出现有利于ZnS:Ce〓的TFEL:发射峰变宽、亮度增大。

It is found that the solubility of methyl chloride in n hexane are decreases with the temperature increased and increases with the pressure increased.

从一氯甲烷分压和溶解度的关系曲线可知,溶解度随着温度的升高而减小,随着压力的升高而增大。

Instead of Hildebrand equation to treat the results of experiment,the equation of two-dimensional solubility parameters has been used to gain the nonpolar part of solubil...

本文讨论了方法的准确性和合理性,并用二元溶解度参数公式代替Hildebrand公式对实验结果进行处理,得到了聚醚溶解度参数的非极性部分,它们分别为6.44、7.15和7.53(cal/cm3)。

Recent reviews of the solubility of carbon dioxide in water(7, 8) and hydrogen sulfide in water(9, 10) are available to those interested in the subject.

关于二氧化碳在水中的溶解度(7,8)和硫化氢在水中的溶解度(9,10),现在有了一些涉及的文献,有兴趣的读者可自行查阅。

The isopiestic method for multicomponent saturated solutions combines isotonic equilibrations with chemical analyses and determines the solubilities of saturated solutes and water activities simultaneously, which makes sure that the experimental solubilities and water activity refer to the true thermodynamic equilibrium and the most precise chemical analyses.

多元饱和溶液的等压法将等压平衡与化学分析统一起来,同时测定饱和溶质的溶解度和水活度,可以确保溶解度和水活度的实验值是由可靠的热力学平衡和精确化学分析确定的。

The molecular weight of broad bean vicilin and legumin measured by gel filtration chromatography were 135000 and 351000, DSC showed that their denature temperatures were 72℃ and 87℃ respectively. The legumin had a lowest solubility at pH 4. 5-5. 0 whereas the vicilin at pH5. 5. Vicilin and legumin were all possessed low levels of α-helical and high β-sheet secondary structure fractions. The total content of α-helical,β-sheet and β-turn fraction of vicilin and legumin reached to 90% and 78% separately showed that they had a high ordered structure in solution.

对两种组分的凝胶层析表明7S和11S的相对分子质量分别为135000和351000;DSC分析显示其热变性温度分别为72℃和87℃;溶解度分析表明:11S球蛋白在pH4.5-5.0之间,7S球蛋白在pH5.5时具有最低的溶解度;圆二色性分析结果显示7S和11S球蛋白的β-折叠结构含量分别高达40.5%和38.1%,证明二者都属于β-折叠型蛋白质,二者的α-螺旋、β-折叠和β-转角结构的含量总和分别达到了90%和78%,从而说明它们在溶液中的结构是高度有序的。

The standard solubility product and solubility of compound salt ammonium molybdate· molybdenum trioxide at 0~100 ℃ condition are studied.

研究了难溶复盐钼酸铵氧化钼的标准溶度积常数和不同温度下的溶解度,测定了同离子效应对溶解度的影响,并用红外光谱分析了其解离形式。

The solubilities in some solvents were investigated and solubilization abilities of OCC for water-insoluble drugs were evaluated. The results show that the degree of substitution of carboxymethyl groups and octyl groups are determined to be 115.9% and 58.0%, respectively. OCC are insoluble in organic solvents while show a much better solubility in water and formed opalescence solutions, which increased the solubility of paclitaxel up to 500 folds in water. The drug loading and drug encapsulation efficiency of OCC are 34.6% and 89.9%, respectively.

所制备的OCC羧甲基取代度为115.9%,取代主要发生在6位羟基上;辛基取代度58.0%,取代主要发生在2位氨基上;与壳聚糖相比,OCC分子间/内氢键作用减弱;OCC在常用的有机溶剂中不溶,但在水中溶解度增加,能够形成具有淡蓝色乳光的纳米胶体溶液,对难溶性抗肿瘤药物紫杉醇具有优越的增溶能力,使紫杉醇在水中的溶解度提高近500倍,载药量34.6%,包封率为89.9%。

The results suggested that chitinhad a good solubility in the new solvent when its at -30℃and below, but the solubilityof chitin no longer increasesd notable as the temperature reduced; The joined of urea, incertain degree, strengthened the solvency of alkali solvent to chitin. When theconcentration of sodium hydroxide is 8%~12%, Chitin had a good solubility, and theapparent viscosity of chitin solution could up to 4000 mpa·s~5000mpa·s at roomtemperature; In addition,the solubility of chitin in new solvent was high when therefrigerated time was three days and above, but the refrigerated time could not too long,otherwise, the deacetylize degree of chitin got more bigger. The properties of chitin solution were tested by revolving viscosimeter, FT-IR,X-RD and so on.

结果表明,在-30℃及以下甲壳素能很好的溶解于新溶剂中,但甲壳素的溶解度不再随温度的下降而有所增大,而是基本保持不变;尿素的加入,在一定程度上强化了强碱溶剂对甲壳素的溶解,当新溶剂中NaOH浓度为8%~12%时,甲壳素在试验温度下可以获得较好的溶解度,所得溶液在室温下的表观黏度达4000 mpa·s~5000mp·s;冷冻时间为3 d及以上时,有利于甲壳素的溶解,超过3 d,甲壳素的溶解度变化不大,另外,冷冻条件下,甲壳素在强碱溶剂中仍会发生脱乙酰化反应,冷冻时间不宜太长。

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