Plancitoxins, lethal factors from the crown-of-thorns starfish Acanthaster planci, are deoxyribonucleases II.

Two lethal factors (named plancitoxins I and II for major and minor toxins, respectively) with the same LD50 (i.v. injection into mice) of 140 microg/kg were purified from spines of the crown-of-thorns starfish Acanthaster planci.

Concentrations of organotin compounds in sediment and clams collected from coastal areas in Vietnam.

Levels of butyltin (BT) and phenyltin (PT) compounds were determined in sediments and clam Meretrix spp. collected from north and central coastal areas in Vietnam. Concentrations of TBT in sediments ranged from 0.