  The existence of specific biorhythms and the role of geomagnetic and/or solar
magnetic activities are well-established by appropriate correlations in
chronobiology. From a physical viewpoint, there are two different accesses to
biorhythms to set up connections to molecular processes: 1. Diffusion of
charged molecules in magnetic fields. 2. Quantum mechanical perturbation
theoretical methods and their resonance dominators to characterize specific
interactions between constituents. The methods of point 2 permit the treatment
of molecular processes by circuits with characteristic resonances and
'beat-frequencies', which result from the primarily fast physical processes. As
examples the tunneling processes between DNA base pairs (H bonds) and the ATP
decomposition are considered.
