Cutting is initiated by heating the edge or leading face ( as in cutting shapes such as round rod ) of the steel to the ignition temperature ( approximately bright cherry red heat ) using the pre-heat jets only, then using the separate cutting oxygen valve to release the oxygen from the central jet.
42.
In particular, the pyrolysis of proteins and carbohydrates begins at temperatures much lower than the ignition temperature of the solid residue, and the volatile subproducts are too diluted in air to ignite . ( In flamb?dishes, the flame is due mostly to combustion of the alcohol, while the crust is formed by pyrolysis as in baking .)
43.
"' Cyanuric triazide "'( C 3 N 12 or ( NCN 3 ) 3 ) is described as an environmentally friendly, low toxicity, and organic primary explosive with a detonation velocity of about 7, 300 m�s " 1, and ignition temperature at 205 �C . Primary research on this compound focuses on its use as a high energy density compound.
