This constancy of time-dependent Cd accumulation is probably related to the low external Cd concentrations (50 pM) use in these experiments.
And Mr. Arnault maintains the constancy of Internet time, in which any time might be work time.
The symmetry properties of the theory can be shown to have as mathematical consequences basic principles known as conservation laws, which assert the constancy in time of the values of certain physical quantities under prescribed conditions.
Lipsius laid particular stress on the role of constancy during times of tumultuous civic and religious change, something he experienced in spades during the course of his career.
Thus, energetic demands of incubation should constrain incubation-scheduling, that is, the length of incubation bouts, their constancy (the amount of time birds actually incubate within an incubation bout), and their timing.
An additional, more theoretical consideration is that even under an ideal model of adaptive convergence without phylogenetic signal, directional selection is expected to affect the assumption of constancy through time.
Proportional hazard assumptions for each model was investigated and confirmed by testing the constancy over time of the log-hazard ratio for each model.
Secondly, the assumptions of rate constancy over time and across lineages are often challenged.
Lipsius's philosophical interest in Roman Stoicism led to the publication of his highly successful Senecan dialogue, set in the midst of the violent religious and political struggles of the Netherlands, De constantia in publicis malis ("On Constancy in Times of Public Calamity", 1583/4).
Against this image of meditation, constancy and the passage of time (or timelessness), a sandy river of life was suggested on the floor by a winding pattern of rice.
I particularly admired his stubborn constancy of tempo at times when the temptation to indulge the thrill of the moment is always strong.
