Microbial biomethylation of metals and metalloids (antimony, arsenic, bismuth etc) Biotransformations of organoarsenic compounds Cot death (SIDS) – prevalence and survival of microbes in the cot environment Toxic metal(loids) in the food chain Toxic action of certain metabolic poisons (eg fluoroacetate, organophosphates) Development of spectroscopic techniques for characterising cells (microbial and human)