反应混合物颜色转变成白色即反应终点。
The reaction completed when the color of the mixture turns to white.
由薄层色谱(TLC)确定每步反应终点。
并提出一种快速、简易的反应终点控制方法。
A quick and convenient method was used for controlling esterification end-point.
优化产物抑制常数可使此积分法所得反应终点产物吸收对剩余底物变化不敏感。
The optimization of product inhibition constant conferred to resistance to the variation of residual substrate concentration on the estimation of maximal product absorbance.
在加氢的过程中我们的主要问题是反应终点不要判断，请问您有没有好的终点判断的方法而不会使加氢过头而产生烷醇。
In the process of hydrogenation Our main problem is not to determine the reaction end point, may I ask you about the way to judge a good finish without excessive hydrogenation Triacontanol arising.
因此，替代终点如反应率和无进展生存率被普遍接受，尽管各方意识到风险所在。
Thus, surrogate endpoints like response rate and progression-free survival are commonly accepted, although all parties involved realize the risk involved.
当滴定终点到来时，所有的未知溶液全都完成了化学反应，溶液的颜色就会发生变化。
When the tipping point comes, and all of the unknown reagent has reacted, the solution changes colour.
二级终点包含了目标反应率，一年生存期，总生存率，化疗类型和安全性PFS评估。
Secondary endpoints included objective response rate, one-year survival rate, overall survival, PFS assessment by chemotherapy type and safety.
我是最后一组比赛的，枪响了，别人还没反应过来，我已经冲了出去，我急速奔跑，没几秒钟就到达了终点。
I am the final group game, a shot, others also have no reaction to come over, I had rushed out, I hasten to run, not for a few seconds to reach the end.
目的探讨体外凝血反应引起压电传感器频率变化的规律，建立压电凝血终点判断模型。
OBJECTIVE To study the principle of dynamic response frequency in piezoelectric coagulation and (establish) a new method for endpoint determination of the analysis.
原油蚀变后提高了甾烷异构化反应程度，某些样品远远超过异构化反应平衡终点值。
After crude oil alteration, the degree of sterane isomerization reaction is enhanced, and in some samples, the balanced endpoint value of isomerization reaction is exceeded far beyond.
主要观察终点为客观有效率、临床获益率、毒副反应发生率。
The primary end points were the overall rate of objective response, disease control rate and adverse effects rate.
用试管取少量反应溶液，往试管内加入硫化锌并摇晃，无黄色沉淀生成即为终点。
End of the reaction can be identified by the fact that when adding zinc sulfide into a test tube containing a little reaction solution, and sway the test tube and no yellow deposition can be seen.
根据氧化还原滴定的特殊规律，运用化学反应的计量关系和能斯特公式，给出了氧化还原滴定终点误差的简单计算公式。
In the paper, according to the specific law of redox titration, using stoichiometric relation and Nernst formula in the chemical reactions.
用林帮的副反应思想处理沉淀滴定平衡、得到条件平衡常数、滴定曲线方程、终点误差 。
The formula can be used to calculate the end point error of both complicated redox reactions and simple ones.
研制了一台以吸收光谱法为基础的锂系聚合反应破杂终点在线测定仪。讨论了终点在线测定的化学理论依据，终点仪的工作原理和结构。
The working principle and construction of an instrument based on absorption spectrometry for on line detection of impurity eliminating end point in Li series polymerization are discussed.
研制了一台以吸收光谱法为基础的锂系聚合反应破杂终点在线测定仪。讨论了终点在线测定的化学理论依据，终点仪的工作原理和结构。
The working principle and construction of an instrument based on absorption spectrometry for on line detection of impurity eliminating end point in Li series polymerization are discussed.
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