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Putrefaction is the fifth stage of death, following pallor mortis, livor mortis, algor mortis, and rigor mortis.This process references the breaking down of a body of an animal post-mortem.
The three characteristics of putrefaction are discoloration, disfiguration, and dissolution. There are many factors that could affect the rate of putrefaction in animals such as age, body composition, temperature, and if the body is located in a wet or dry area. [8] Temperature must be between 0 °C and 48 °C for putrefaction to occur.
The human body is composed of approximately: 64% water, 20% protein, 10% fat, 1% carbohydrate, 5% minerals. [1] The decomposition of soft tissue is characterized by the breakdown of these macromolecules, and thus a large proportion of the decomposition products should reflect the amount of protein and fat content initially present in the body. [4]
Technique: Body cooling (measure body cooling to estimate time since death) Pigs: stages of body cooling after death. In pigs, the decrease in body temperature occurs in the eyeball, orbit soft tissue, rectum, and muscle tissue. [29] Up to 13 hours after death, eyeball cooling in pigs provides a reasonable estimate of time since death. [30]
These multiply, consuming the body's carbohydrates, lipids and proteins, to produce a variety of substances including propionic acid, lactic acid, methane, hydrogen sulfide and ammonia. The process of microbial proliferation within a body is referred to as putrefaction and leads to the second stage of decomposition known as bloat. [14]
Along with common factors of temperature, humidity and element exposure, body habitus and clothing are an example of a component that can affect the rate of cooling of the body, and so its rate of decomposition. [5] [6] A very approximate rule of thumb for estimating the postmortem interval is as follows: [7] Warm and flaccid: less than 3 hours
Adipocere was first described by Sir Thomas Browne in his discourse Hydriotaphia, Urn Burial (1658): [3]. In a Hydropicall body ten years buried in a Church-yard, we met with a fat concretion, where the nitre of the Earth, and the salt and lixivious liquor of the body, had coagulated large lumps of fat, into the consistence of the hardest castile-soap: wherof part remaineth with us.
The contemplation of the nine stages of a decaying corpse is a Buddhist meditational practice in which the practitioner imagines or observes the gradual decomposition of a dead body. Along with paṭikūlamanasikāra , this type of meditation is one of the two meditations on "the foul" or "unattractive" ( aśubha ).