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The climate and temperature in which a corpse decomposes can have great effect on the rate of decomposition; [11] higher temperatures accelerate the physiological reactions in the body after death and speed up the rate of decomposition, and cooler temperatures may slow the rate of decomposition. [11]
This optimal temperature assists in the chemical breakdown of the tissue and promotes microorganism growth. Decomposition nearly stops below 0 °C (32 °F) or above 48 °C (118 °F). Moisture and air exposure: Putrefaction is ordinarily slowed by the body being submerged in water, due to diminished exposure to air.
Thermal decomposition, or thermolysis, is a chemical decomposition of a substance caused by heat. The decomposition temperature of a substance is the temperature at which the substance chemically decomposes. The reaction is usually endothermic as heat is required to break chemical bonds in the compound undergoing
Simplified control circuit of human thermoregulation. [8]The core temperature of a human is regulated and stabilized primarily by the hypothalamus, a region of the brain linking the endocrine system to the nervous system, [9] and more specifically by the anterior hypothalamic nucleus and the adjacent preoptic area regions of the hypothalamus.
The human body always works to remain in homeostasis. One form of homeostasis is thermoregulation. Body temperature varies in every individual, but the average internal temperature is 37.0 °C (98.6 °F). [1] Sufficient stress from extreme external temperature may cause injury or death if it exceeds the ability of the body to thermoregulate.
It is difficult to measure the effects as there is such a wide range of drugs, dosages and potential interactions between combinations of drugs. Genetic predisposition and epigenetic expression affect various aspects of physiology, and may influence susceptibility and response to decompression stress, but this has not yet been studied. [39]
Stability or fluctuation of the ambient temperature. The thickness (i.e. thermal insulation value) and body coverage of clothing or similar materials. The thermal conductivity of the surface on which a body lies. Diseases or drugs which increase body temperature and thereby raise the starting temperature of the corpse at the time of death
At the very high temperature of 3,000 °C (3,270 K; 5,430 °F) more than half of the water molecules are decomposed. At ambient temperatures only one molecule in 100 trillion dissociates by the effect of heat. [15] The high temperature requirements and material constraints have limited the applications of the thermal decomposition approach.