阈浓度

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 .

0.1mmol硫酸锌可对抗0.4μmol哇巴因诱发的豚鼠心室肌振荡后电位，提高引起振荡后电位的哇巴因阈浓度。

Zinc sulfate ( 0.1 mmol ) inhibited the guinea pig papillary muscle oscillatory afterpotential induced by ouabain ( 0.4 μ mol ) . It increased the threshold concentration of ouabain necessary for inducing oscillatory afterpotential .

可见汞的慢性毒作用阈浓度为0.01mg／m3，与我国现行的汞车间卫生标准一致。

It is indicated that the slowing mercury poison concentration range was 0.01 mg / m3 .

目测观察不同管电压的X线图像，确定碘的探测阈浓度。

The detection threshold concentration of iodine was determined by inspecting radiographic images at a range of X-ray tube voltages and input exposure levels .

观察X线管电压、表面剂量、比释动能以及碘探测阈浓度之间的变化关系。

Surface doses were obtained from measured X-ray tube output data . The correlative changes were observed among X-ray tube voltage , surface dose , air kerma , and the detection threshold concentration of iodine .

由此认为，高浓度（206mg/m~3）为可引起机体产生明显反应的浓度，低浓度（15.3mg/m~3）为慢性阈浓度。

It is considered that the high concentration ( 206mg / m3 ) could cause pathological changes and the low concentration ( 15.3mg / m3 ) might be the threshold concentration of intoxication on chronic exposure .