“…Stria has been destroyed and the spiral ligament is degenerate., 5 of dilute formaldehyde at the cellular level has been the subject of exhaustive research, and the results from in vitro experiments with liver and kidney homogenates show that the whole mitochondrial system concerned with energy transfer process is affected when exposed to between 5 and 150 ,ug formaldehyde (Bernheim 1951, Watts 1951, Sommer & Hasselbach 1967, Van Buskirk & Frisell 1969. Furthermore, dilute formaldehyde has also been shown to have adverse effects on nucleic acids (Feldman 1967, Popa et al 1967, Collins & Guild 1968).…”