Figure 2.

Relaxation modes of linear multiscale networks. For a given timescale, monomolecular networks with total separation behave as a single step: the concentrations of some species (white) are practically constant, some species (yellow) are rapid, low concentration, intermediates, one species (red) is gradually consumed and another (pink) is gradually produced. We have represented the sequence of one step approximations of a reduced, acyclic, deterministic digraph, from the quickest time-scale t₁ = λ⁻¹₁ to the slowest one t₄ = λ⁻¹₄. These one step approximations are activated when mass is introduced at t = 0 via the “boundary nodes” A₁ and A₆.