This seminar is the continuation of a series in Physics of the Living State (Applied Physics Scientific Section). You will be especially welcome if you are visiting the Centre, or other Trieste Institutes, as Associate Members, TRIL Fellows, or if you are from Affiliated Institutes in the various areas of Applied Physics. The summary of the seminar can be consulted at: http://www.ictp.it/~chelaf/ss60.html Refreshments will be served at the end of the seminar.