A biphasic model of lifespan in nematode worm.

Ageing research focuses on identifying lifespan modifiers and understanding and appropriately interpreting their effects. One of the most relevant quantities being studied is the shape of the survival curve that can reveal crucial information on the mechanism of action. Here, we introduce a bilogistic model to describe the shape of the lifespan curves of populations.

A new necessary condition for Turing instabilities.

Reactivity (a.k.a initial growth) is necessary for diffusion driven instability (Turing instability).