It detects magnetic signals that are produced by the electrical activity of brain cells—and which have about a billionth of the strength of the Earth's magnetic field.
这种方法能探测到脑细胞电活动发出的磁信号——一种信号的强度只相当于地磁场的一万亿分之一。
2
Sample stacking in capillary electrophoresis can concentrate sample species through the electricalfieldstrength gradient caused by the inhomogeneous buffer concentration field in capillary.
Electrical parameters affecting gene transfer, such as the fieldstrength ( Voltage ), pulse durations and pulse frequency ect. and optimum transfer conditions in murine hybridoma cells were studied.