The formation of adipocere slows decomposition by inhibiting the bacteria that cause putrefaction. In alchemy, nigredo, or blackness, means putrefaction or decomposition. Reek of Putrefaction is the debut album by British extreme metal band Carcass. "Reek of Putrefaction" was first released in 1988. The limited oxygen in the ischemic limb limits putrefaction and bacteria fail to survive. Certain poisonous substances to the body can delay the process of putrefaction. Cadaverine is a foul-smelling diamine compound produced by the putrefaction of animal tissue. The original CD release contained 16 bonus tracks taken from the "Reek of Putrefaction" album. After death, the vitreous resists putrefaction longer than other body fluids. Many species float when dead, due to the gases of putrefaction. Necrophagist's debut album "Onset of Putrefaction" has been out of print for years. Methylamine arises as a result of putrefaction and is a substrate for methanogenesis. The body was discovered on the 31st of March due to the smell of putrefaction. However, this diamine is not purely associated with putrefaction. The rate of putrefaction is greatest in air, followed by water, soil, and earth.