在岩石上的磨片上投影带格子数的网,仔细计算有色矿物的格子数占全部格子数的比例,这个比例就是比色指数,由此可以看出带白和带黑的程度如何。计算比色指数的时候要特别小心,千万别被视觉所迷惑,一切绝对依所算得的格子数来决定。
在比色分析中,由指数曲线函数方程转换的直线化回归方程的图形,是表达指数曲线相关的最佳直线。
The figure of regression equation of linearise turned from the functional equation of exponential curve is the best line to express the correlation of exponential curve in colorimetric analysis.
通过观察细胞病变效应,用噻唑蓝(MTT)比色法检测细胞存活率,以确定该药物治疗指数。
By means of observing cytopathic effect and adopting MTT colorimetric assay for cell survival rate, their therapeutic index was calculated.
采用四甲基噻唑兰(MTT)比色法测细胞毒性作用,并计算细胞的存活率利治疗指数(TI)。
MTT method was used to evaluate the cytotoxicity, and the cell viability and therapeutic index (ti) was calculated.
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