The cytoplasmic pH was measured by GFP fluorimetry [4], a technique allowing observation of both steady-state adaptation and kinetic responses on a 4-second time scale.
In contrast, PKA- and GRK-mediated negative feedback loops (B1ARPA and B1ARPG, respectively) reduced PLB phosphorylation either by enhancing steady-state adaptation (PKA) or attenuating the overall PLB signal (GRK).
For the steady pipe flow, adaptation is driven by mean stream-wise velocity measurements at 24 locations along the pipe radius.
In particular, it examines the effects of changes in the rate of flow through the chemostat, the stability of kinetic steady states, the adaptation of phytoplankton cells to their environment and competition between different species.
where applicable; h) repeat steps (b) – (g) until termination (time limit, adaptation steady states, etc).
Cells were harvested for analysis on two consecutive days during each steady state by adaptation of the technique of Kochanowski et al [ 8].
They found that populations can survive by maintaining a steady rate of adaptation as long as the rate of change in optimum is below a critical threshold, which is determined by the standing genetic variation, individual fecundity, effective population size, environmental stochasticity, and strength of selection.
For many forest trees, fecundity is several orders of magnitude higher; if an average tree produces 10 000 seeds, its rmax = 9.2, and populations could potentially sustain steady rates of adaptation when the optimum changes as much as ∼0.42 σp per generation, following these assumptions.
In contrast, inhibition of the PKA negative feedback loop raised the steady-state PLB activity and disrupted oscillations, showing that this feedback loop controlled steady-state PLB adaptation.
The study further showed that in the fed steady-state, chronic adaptation to LCn-3PUFA induces greater activation (P<0.05) of the Akt-mTOR-S6K1 signalling pathway.
