Validity of the law of mass action in three-dimensional coagulation processes

The law of mass action describes the speed of chemical reactions. Our model calculations demonstrate, however, that at sufficiently high reactant densities the law is violated. The deviations are attributed to many-particle effects. more

Population dynamics and the evolution of cooperation in group-structured populations

Microbes providing public goods are widespread in nature despite running the risk of being exploited by free-riders. However, the precise ecological factors supporting cooperation are still puzzling. Here, we consider the role of population growth... more