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The iodide ion sensitivity of a solid-supported bilayer lipid membrane (s-BLM) containing buckminsterfullerene(C60) as an electron mediator has been investigated using the cyclic voltammetry technique. We have shown that C60 in a lipid bilayer environment produces a unique and simple s stem for the detection of iodide. The sensitivity of C60-containing s-BLM to 1-is excellent with a linear response in the range from I d t o 10.' M. The use of fullerene C60-doped s-BLMs as sensors and devices for detecting other species is proposed.

To determine the effects of extremely low-frequency (ELF) inductively coupled weak magnetic fields on the proliferation of 6B 1 hybridoma cells, we adopted 3-[4,5-dimethylthiazolyl]-2,5-diphenyl tetrazolium bromide (MTIJ colorimetry for determination of dehydrogenase production. The result shows that 0.8 mT, 30 Hz (Helmholtz coils) significantly inhibits proliferation on the order of -40%. At lower and higher frequencies, this restriction decreases to zero, or even changes to positive values. This outcome is rather rare for proliferation responses and is discussed with other ' 'electromagentic field windows."

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