| abstract |
A method and apparatus for producing an effect of a chemical or biochemical agent on a system responsive to such agent, are disclosed. In practicing the method of the invention, the system is placed within the region of magnetic field of an electromagnetic transducer to which is applied, a lowfrequency, time-domain signal characterized, on spectral analysis, by a plurality of agent-specific spectral peaks. These spectral peaks are identified from tht spectral plot of a low-frequency, time-domain signal produced by: (i) placing such a chemical or biochemical agent in a container having both magnetic and electromagnetic shielding, and (ii) recording a low-frequency, time-dependent signal from the sample while injecting noise into the sample at a noise level effective to produce such identifiable spectral peaks in a spectral plot of the timedomain signal. The sample is exposed to the magnetic field produced by the transducer, at an applied signal power and for a period sufficient to produce in the system an agent-specific effect on the system. |