Figure 2.

Schematic representations (thick black lines) of the dependence of the triplet reaction yield (Φ_T) on the strength of a quasistatic magnetic field. The orange arrows indicate the yields for the maximum and minimum values of B_QS in Equation (2) that correspond to extrema in sinusoidal LFMF. The green arrows show the yields when B_QS = B_DC. The blue arrows mark the free radical yields averaged over the phase of the LFMF. (A) When Φ_T depends linearly on B, the effect of the static magnetic (geomagnetic) field and the LFMF together equals that of the static field alone; the blue and green arrows are at the same point of the ordinate axis, i.e., there is no effect of LFMF. (B) When Φ_T depends non-linearly on B, the effects of static magnetic field plus LFMF and static magnetic field alone differ. Φ_T in (B) has been drawn with negative curvature (concave downward), with the result that the triplet reaction yield under LFMF plus the static magnetic field is lower than the static magnetic field alone. A positive curvature (concave upward) would give the opposite signs. Adapted with permission from [83] 2019, eLife Sciences Publications, Ltd.