阈浓度是指在化学物质毒性实验中引起要害作用的最低浓度。
去甲麦普替林、活性部分的浓度高于阈浓度时，会增加出现不良反应的可能。
When the concentrations of N-demethylmaprotiline and active moiety are higher than threshold concentration, the possibility of side effects may be increased.
利用系综平均的方法，计算了在单峰高斯分布适应面上准物种的浓度分布和误差阈。
By ensemble average method, the concentration distribution and error threshold of quasispecies on single peak Gaussian distributed fitness landscapes were evaluated.
结果在噪声刺激期腹膜内注射不同浓度普萘洛尔，对耳蜗血流和噪声暂时性阈移无影响。
Results The cochlear blood flow and noise-induced level of temporary threshold shift were not affected by different concentration of Propranolol during noise exposure.
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