Interesting Publication http://pubs.acs.org/doi/pdf/10.1021/jp952243x I know it is old, but the concept of noise to cause a threshold to be reached reminded me of another idea. This is a good one for others to see the experiment, math as well the discussion Energy as a resonance causing a chemical reaction. Makes good sense! for more familiarity see http://www.physik.uni-augsburg.de/theo1/hanggi/Papers/282.pdf From the European Journal.... Read their outlook and see what it means to biology