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Through experiment, we have found that the combination of naphthol/sodium naphtholate is a high efficient bifunctional catalyst for direct aldol reaction.

通过实验,我们发现并筛选出了一组活性较高的β-萘酚和其钠盐双功能催化剂,该方法不需要预先活化Aldol反应的底物就能直接反应,且反应可在室温进行,条件温和,速度快,收率高达98%。

For that question: how a probability event becomes to be a certainty event after some time.The answerer is that the Probability is changing along the development of time since many factors will affect the Probability in that time interval and Probability=1 at the point it happened.

又如生化反应,在刚开始的时候,那些化学物质发生反应的概率可能很小,加入催化剂(或者即使不加入催化剂,由于各物质的溶度随着反应进行,时间的推移而改变)影响着后来某一时刻这些化学物质能否完全反应。

The results showed that:(1) The characteristic frequency of IC neurons of house mouse was increased with increasing recording depth, and the masker intensity used was positive relevant to the IC neurons\' minimum threshold. When the minimum threshold was high, the masker intensity needed was loud, vice versa.(2) According to the masking rate at MT+10dB of IC neurons to frequency modulation and tone burst, the IC neurons were classified as three types: type I neurons ( 72/113, 63.7%), in which the masking effect of TB was better than frequency modulation ;type II neurons (32/113, 28.3%), in which the masking effects of the two maskers were same; type III neurons( 9/113, 8.0%), in which the masking effect of FM was better than TB.(3) Type I neurons, the minimum threshold of which was low, but the Q_(10) and DR values of which were large; in type III neurons, the minimum threshold was high, the Q_(10) and DR values were narrow; in type III neurons, the MT Q_(10) and DR values were in between.(4) Both FM and TB could make the MT of type I neurons shift upward distinctively, but the effect of TB was more significant than FM.(5) The Q_(10) values of type I neurons became narrower under the influence of TB, were unaffected under the influence of FM.

结果显示:(1)小鼠下丘神经元的特征频率随着记录深度的增加而增高,掩蔽声强度与神经元的最小阈值呈正相关,即对高最小阈值的神经元进行掩蔽时需要的掩蔽声强度高,对低最小阈值神经元进行掩蔽需要的掩蔽声强度低:(2)根据调频声(frequency modulation, FM)和短纯音(tone burst, TB)对下丘神经元阈上10dB处反应的掩蔽,将小鼠IC神经元分为三类:Ⅰ类神经元(72/113,63.7%),短纯音的掩蔽效果比调频声更好;Ⅱ类神经元(32/113,28.3%),两者对神经元声反应的掩蔽率相同;Ⅲ类神经元(9/113,8.0%),调频声的掩蔽效果更好;(3)Ⅰ类神经元的最小阈值低、Q_(10)值和动态范围大,Ⅲ类神经元最小阈值高、Q_(10)值和动态范围小,Ⅱ类神经元的最小阈值、Q_(10)值和动态范围介于Ⅰ和Ⅲ类神经元之间;(4)短纯音和调频声都可以使Ⅰ类神经元声反应的最小阈值明显上移,但短纯音使神经元最小阈值的上移更显著:(5)短纯音使Ⅰ类神经元的Q_(10)值变小,调频声使神经元的Q_(10)值增大不显著,短纯音与调频声对神经元Q_(10)的影响差别显著;(6)短纯音与调频声都使神经元的动态范围减小,并且作用显著,但短纯音的效果更显著:(7)短纯音与调频声都使神经元反应的潜伏期延长,效果显著,但TB的延长作用更为显著;(8)随着探测声强度的升高,短纯音和调频声对Ⅰ类神经元声反应的掩蔽率都降低,但在各个探测声强度短纯音的掩蔽率都比调频声高。

The experimental results show that the content of SiC in RBSC increases with carbon content while α-SiC is chosen as a filler. However, the residual carbon would appear in specimens when the carbon content exceeds 30% by weight. Using carbon felt, the reaction-formed SiC particles are small and uniform in size and distribution. However, when carbon felt is impregnated with phenol resin, the reaction-formed SiC is nonuniform in size and distribution. X-ray diffraction shows that the fabricated RBSC is composed of α-SiC,β-SiC, and free Si. The polytype of SiC is related to the reaction-heat during sintering.

结果表明:选用α-SiC+C粉的混合物作为生坯,SiC相的体积分数随生坯中wC的增加而增加,但过大的wC将使硅化后的试样出现残碳;选用碳毡作为生坯,反应烧结碳化硅的显微组织特点是C/Si反应生成的碳化硅颗粒均匀细小,并呈线状分布在游离硅中;浸渍过树脂的碳毡硅化处理后的显微组织特点是反应生成的碳化硅颗粒粗大且呈不均匀分布。X射线衍射结果也表明,反应烧结碳化硅陶瓷由游离Si、α-SiC、β-SiC组成,试样中不同晶型碳化硅的出现与C/Si反应的放热过程有关。

Result:The grades of the abilities of mass motor and balance were positively correlated with the A reaction time,total reaction time of Stroop Test,and negatively correlated with the score of down-reciting in Wechsler Memory Scale.The standard score of lack of learning ability or mal-coordination was positively correlated with the D reaction time,total reaction time and the number of D errors and total errors in Stroop Test,and positively correlated with the standard grade in Ravin's Standard Progressive Matrices.The negative correlation was existed between the grade of touch excessive defense,emotionalinstability and the errors in C part and the reaction time in interference of word color in the Stroop Test.

结果:感觉统合功能量表中,大肌肉及平衡能力的等级评分与Stroop测验的A反应时、总反应时呈正相关,与韦氏记忆中倒背数字得分呈负相关;触觉过度防御及情绪不稳的等级评分与Stroop测验的C错误数和色干扰呈负相关;本体感不佳、身体协调不良的等级评分与Stroop测验的C错误数和总错误数呈负相关;学习能力发展不足或协调不良的等级评分与Stroop测验的D反应时、总反应时、D错误数、总错误数以及瑞文标准推理测验的标准等级分呈正相关;大年龄的特殊问题的等级评分与Stroop测验的C错误数、D错误数、总错误数呈负相关。

In order to develop an useful synthestic process, we have synthesized amides with various substitutents. The isoquinoline skeleton was constructed through Bischler-Napieralski reaction, followed by asymmetric reduction of the imine intermediates with a Ru complex to form the only chiral center. Finally, we connected the two phenyl groups by Heck reaction and effectively obtained optically active aporphine alkaloids.

为了发展一套实用的合成方法,我们首先制备於苯环上具有不同种取代基的苯乙醯胺,接著透过Bischler-Napieralski反应进行分子内合环,并利用钌金属对亚胺中间体进行不对称的还原反应,建立出产物中唯一的光学活性中心,最后再利用Heck反应连结两个苯环,就可以顺利得到具有光学选择性的阿朴吩类天然物。

The optimal measuring conditions were investigated. The results indicated that the catalytic reaction to Pt and bromocresol purple was the first-order reaction. The apparent activation energy was 217.4kJ/mol and the maximum absorption wavelength of fading reaction was at 434 nm. The linear range of Pt was 0.16-4.0μg/L and the detection limit was 2.5×10^(-11)g/mL. Most of common ions had no interference with the determination, while ten multiples of Ru, Rh and Os had interference with the determination of Pt. Therefore.

选择了最佳测定条件,实验结果表明,催化反应对铂和溴甲酚紫为一级反应,反应的表观活化能为217.4kJ/mol,褪色反应的最大吸收波长为434nm,方法测定R哪的线性范围为0.16~4.0μg/L,检出限为2.5×10^(-11)g/mL,大多数常见离子不干扰测定,10倍以上的Ru,Rh和Os对测定有干扰,可在测定前分离除去。

The asymmetric esterification of glycidol catalyzed by lipase was carried out in a nonaqueous medium. The effect of the replacement of water necessary for the function of lipase with water-mimicking solvent on the resolution was investigated.

利用脂肪酶在非水介质中对外消旋环氧丙醇进行不对称酯合成反应,重点研究了强极性有机溶剂作为仿水溶剂完全替代反应体系中的微量&必须&水对酶促拆分反应的影响。

The metals, such as Fe, Cu and Co, which can be reduced by KBH〓, can not change the catalytic properties obviously if only small amount of them are added to Ni-B alloys; those who can not react with KBH〓, such as Zn〓, are washed out during the preparation, so they also can not change the catalytic properties; while addition of the elements in VIB group, such as Cr, Mo and W, can increase the hydrogenation activity magnificently.

同样,我们通过添加第三组分来修饰Ni-B合金,可以被还原的金属,如Fe、Co、Cu等,少量添加并不能明显改变其反应性能;而与KBH〓不发生反应的金属,如Zn,以离子形式加入后,除了少量离子被吸附在催化剂表面外,基本不残留在催化剂里,因此对反应性能也没有太大的改变;只有VIB族元素,如Cr、Mo、W的加入才会很大改进Ni-B催化剂在蒽醌加氢中的催化性能,尤以Cr的修饰作用最好。

The formal potentials in cyclic voltammograms of these 3+ valence complexes are followed: Co〓-TPPS (-0.08V )>Fe〓TPPS (-0.14V)>Mn〓-TPPS (-0.23V). The electrochemical reaction of Mn〓-TPPS is reversible, and both of Co〓-TPPS and Fe〓-TPPS are quasi-reversible. The standard heterogeneous rate constants of Co〓-TPPS and Fe〓-TPPS were determined to be 1. 4×10〓cm/s and 1.4×10〓cm/s respectively. The rates of electrode reaction are as followed: Mn〓-TPPS>Co〓-TPPS>Fe〓-TPPS, e.i. Mn〓-TPPS is the most easily oxidized by the dissolved oxygen, and Fe〓-TPPS is oxidized slower than Co〓-TPPS. Ni〓-TPPS can not be oxidized. It is considered that oxygen plays an important role in the valence change of central metal atom and the rate of electron transfer in some metalloporphyrins.

三价金属卟啉络合物在循环伏安图上可得到三价到二价的还原和氧化响应,电极电位从大到小排列为:Co〓-TPPS(-0.08V)>Fe〓-TPPS(-0.14V)>Mn〓-TPPS(-0.23V),电极反应可逆性也不相同,Mn〓-TPPS是可逆过程,Co〓-TPPS、Fe〓-TPPS是准可逆过程,实验测得Co〓-TPPS的标准电极反应速率常数ks=1.4×10〓cm/s,Fe〓-TPPS的ks=1.4×10〓cm/s,电极反应的速率从大到小为:Mn〓-TPPS>Co〓-TPPS>Fe〓-TPPS,即Mn〓-TPPS最容易被溶解氧所氧化,Fe〓-TPPS被氧化的速度最慢,Ni〓-TMPyP不能被氧化,因此我们认为溶解氧对金属卟啉中心离子的价态和电子转移速率起着重要作用。

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