DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Light micrograph (LM) of DDT (insecticide) crystals. DDT (Dichloro-diphenyl-trichloroethane), an organochlorine, is a colourless crystalline substance that is practically insoluble in water but highly soluble in fats and most organic solvents. It is the best known of a number of chlorine-containing pesticides used in the 1940s and 1950s. DDT was developed as the first of the modern insecticides early in World War II. DDT was responsible for eradicating malaria from Europe and North America. In the 1960s DDT was claimed to cause cancer and harm bird reproduction by thinning eggshells. This led to the pesticide being banned for agricultural use in most developed nations. DDT is not particularly toxic to humans, compared to other widely used pesticides. In particular, no link to cancer has yet been established. Magnification: x30 when shortest axis printed at 25 millimetres.
Model release not required. Property release not required.