Welcome to nonlinearity in biology, toxicology and medicine.

Clinical trials of TCDD.

NIH-98-134: Contemporary Medicine as Presented by its Practitioners Themselves, Leipzig, 1923:217-250.

Finding the baby: is there clinical utility to low-dose effects?

On the shoulders of giants: remembering e.p. Odum.

Modeling the effect of density-dependent chemical interference upon seed germination.

A mathematical model is presented to estimate the effects of phytochemicals on seed germination. According to the model, phytochemicals tend to prevent germination at low seed densities. The model predicts that at high seed densities they may increase the probability of seed germination and the number of germinating seeds. Hence, the effects are reminiscent of the density-dependent effects of a...