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Acetaldehyde(0\^1 mol) was treated with n propylthiol(0\^1 mol) at 35 ℃ for 20 min to yiled 72% acetaldehyde propyl mercaptal .

以 0 。1 mol乙缩醛和 0 。1 mol 正丙硫醇为原料，35℃下在四氯化碳中反应，经红外光谱，色谱，质谱，元素分析以及核磁共振谱检测，确证了产物为乙醛正丙硫醇缩醛。

Using the improved method, the standard molal enthalpies of solution ＝－29.18 kJ·mol－1 in pure water and ＝－25.79 kJ·mol－1 in aqueous sulfuric acid were obtained, respectively.

借助VOSO4水溶液的离子缔合平衡和硫酸的二级解离平衡，改进了Archer方法，并用这种改进的方法分别估算了VOSO4·2.76H2O在水中的标准摩尔溶解焓＝－29.18 kJ·mol－1，以及在0.5 mol·kg－1硫酸水溶液中的标准摩尔溶解焓＝－25.79 kJ·mol－1。

Under the same concentration, tadalafil induce higher ratio of relation responses in the smooth muscles of CRF rabbit cavernosal strips, compared with papaverine and sodium nitroprussiate, with most significant difference occurring under the concentration indicators of 10-5 mol/L and 10-4 mol/L (P.01). Conclusions The effects of tadalafil on relaxation responses in CRF rabbit cavernosal strips highly depend on its concentration. The effect of tadalafil on relaxation responses in CRF rabbit cavernosal strips is better than that of papaverine and sodium nitroprussiate. Tadalafil may be an effective drug for treating CRF reduced erection dysfunction.

同一浓度下，他达拉非对慢性肾功能衰竭兔阴茎海绵体平滑肌舒张百分比与罂粟碱、硝普钠相比较，舒张百分比均大于罂粟碱和硝普钠，且在10~(-5)mol/L、10~(-4)mol/L浓度，他达拉非对慢性肾功能衰竭兔阴茎海绵体平滑肌舒张百分比，与罂粟碱、硝普钠相比较有显著性差异(P＜0.01)结论他达拉非对慢性肾功能衰竭兔阴茎海绵体平滑肌舒张反应的影响具有浓度依赖性，他达拉非对慢性肾功能衰竭兔阴茎海绵体平滑肌舒张反应的影响优于罂粟碱及硝普钠，他达拉非可能是治疗慢性肾功能衰竭性阴茎勃起功能障碍的理想药物。

Microwave-assisted ring-opening polymerizations of DTC were carried successfully with lanthanum chloride (LaCl3) and stannous octoate Sn(Oct2 ascatalyst and the highest weight average molar mass of the obtained PDTC were 66800g/mol and 14600g/mol, respectively.

分别在氯化镧和异辛酸亚锡的催化下，DTC的微波开环聚合反应可以顺利地进行，所得PDTC的重均分子量分别达到66800g／mol和14600g／mol，二者比较而言，氯化镧的催化活性更高。

Methods Periosteal cells were isolated and cultured in vitro and then exposed to dexamethasone 10 -8 mol/L, 10 -7 mol/L an...

利用多种细胞因子促进细胞向成骨细胞的分化，以保证细胞在植入体内后能够保持并充分发挥其成骨活

The results showed that SPR angel changed very little when the concentration of phenanthroline or iron changed from 10~(-6) mol/L to 10~(-4) mol/L, but the combination of phenanthroline with iron produced great SPR response.

结果表明，在10~(-6)～10~(-4)mol／L浓度范围内，铁和邻二氮菲各自SPR角度变化较小，而它们的络合物有较大的SPR响应，据此进行它们的相互作用研究。

The reaction rate constants of Pb〓 with pheophytin a, pheophytin b and hydroxypheophytin a were 2. 0 mol〓 l s〓, 0.78mol〓 l s〓and 1. 86 mol〓 l s〓, respectively.

铅与叶绿素a直接进行反应的结果显示：铅并不能取代叶绿素中的镁生成铅叶绿素。

Experiment shows that for coated wire calcium ion-selective electrodes with copper matrix,there is a linear dependence of the electrode potential on logarithm calcium ion activities over a range of 10'(-1)-2x10~(-5) mol/L,the limit of detection is 8x10~(-6) mol/L,the electrode pote...

结果表明，铜基涂丝钙离子选择电极线性范围为10~(-1)-2×10~(-5) mol/LCa~(2+)，检测极限达8×10~(-6) mol/L，斜率为30±2mV，适用 pH 范围为4。 5-11。 0，响应时间少于15s，内阻低，选择性和稳定性好，使用寿命一般为三个月左右，并成功的用于水质分析及钙离子的有关络合物稳定常数的测定。

The floatation rate of Pd (superscript 2+) reaches 100% when the concentrations of NaNO3, KBr and cetyl pyridinium bromide in solution are 0.05 g/mL, 3.0×10^(-2) mol/L, 5.0×10^(-4) mol/L(pH 4.0), respectively. Pd (superscript 2+) could be separated from Ru (superscript 3+), Al (superscript 3+), Cr (superscript 3+), Ni (superscript 2+), Ga (superscript 3+), Fe (superscript 3+) and Zn (superscript 2+) by floatation quantiatively. A method of flotation separation and enrichment of Pd (superscript 2+) was established.

当溶液中硝酸钠、溴化钾、溴化十六烷基吡啶的浓度分别为0.05 g/mL，3.0×10^(-2)mol/L，5.0×10^(-4)mol/L，在pH 4.0时，Pd(上标 2+)的浮选率达到100%，Pd(上标 2+)可与Ru(上标 3+)，Al(上标 3+)，Cr(上标 3+)，Ni(上标 2+)，Ga(上标 3+)，Fe(上标 3+)，Zn(上标 2+)定量分离，据此建立了浮选分离和富集Pd(上标 2+)的新方法。

For example, the ratio of pyrogenation will reach 90% at around 600℃, and we can get 1.8 mol hydrogen from one mol methanol.

温度在600℃左右时，甲醇热分解率达90%，每摩尔的甲醇可产生1.8摩尔左右的氢气。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。