Exposure limits set for microwave radiation assume that any biological effects result from tissue heating1: non-thermal effects have been reported but remain controversial. We show here that prolonged exposure to low-intensity microwave fields can induce heat-shock responses in the soil nematode Caenorhabditis elegans. This effect appears to be non-thermal, suggesting that current exposure limits set for microwave equipment may need to be reconsidered.
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de Pomerai, D., Daniells, C., David, H. et al. Non-thermal heat-shock response to microwaves . Nature 405, 417–418 (2000). https://doi.org/10.1038/35013144
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