Confusion and a lot of questions exist as to detonation and pre-ignition. Sometimes you hear mistaken terms like pre-detonation. Detonation is one phenomenon that is abnormal combustion. Pre-ignition is another phenomenon that is abnormal combustion.
From Wikipedia, the free encyclopedia. Martha Herbert is an American physician and assistant professor of neurology at Harvard Medical School and pediatric neurologist at Massachusetts General Hospital. Herbert is also director of the TRANSCEND program at the Athinoula A. Martinos Center for Biomedical Imaging.
Marjorie Sewell Holt (born September 17, 1920), a Republican, was a U.S. Congresswoman who represented Maryland's 4th congressional district from January 3, 1973 to January 3, 1987.