Verhalten der Chroms?ure und der Uebermangans?ure gegen die niederen Oxydationsstufen des Eisens, Arsens und Antimons

Ohne Zusammenfassung     

Evolution on a smooth landscape

We study in detail a recently proposed simple discrete model for evolution on smooth landscapes. An asymptotic solution of this model for long times is constructed. We find that the dynamics of the population is governed by correlation functions that although being formally down by powers ofN (the population size), nonetheless control the evolution process after a very short transient. The long-time behavior can be found analytically since only one of these higher order correlators (the two-point function) is relevant. We compare and contrast the exact findings derived herein with a previously proposed phenomenological treatment employing mean-field theory supplemented with a cutoff at small population density. Finally, we relate our results to the recently studied case of mutation on a totally flat landscape.     

Note on the theory of solutions of strong electrolytes

Summary In the general case, assumptions of an increase in the average diameter of ions and hydration numbers with temperature contradict experiment. To explain the positive deviations of experimental heats of dilution from the Debye-Hückel theory, it is necessary to consider the existence of ionic pairs in solution and changes in the solution structure with concentration.