Professor Mike Ward. NYU chemistry department. This means that the lethality of DDT depends on both its chemical and crystal structure. Form II was significantly more lethal to fruit flies, possibly ...

"The finding is a surprising one as, for decades, DDT crystals were thought to exist in only one form," adds co-author Michael Ward, also a professor in NYU's Department of Chemistry. "This new ...

Ward, an N.Y.U. chemistry ... two forms,” Dr. Kahr said, “it was natural to ask, which of these forms was the historical killer of insects?” It turned out that the chaotic form of DDT ...