Chemicals and DrugsPhenomena and ProcessesHealth Care
Spontaneous CombustionCoal
Spontaneous Combustion
A circumstance where a substance or organism takes fire and burns without an exogenous source. Spontaneous human combustion differs from preternatural human combustibility in that in the latter, some spark or trivial flame sets the fire and the body tissues, which have a greatly enhanced inflammability, continue to undergo incineration without any external heat source or combustible materials. (Bergman NA. Spontaneous human combustion: its role in literature and science. Pharos 1988;Fall;51(4):18-21)
Coal
A natural fuel formed by partial decomposition of vegetable matter under certain environmental conditions.

Emergence of morel (Morchella) and pixie cup (geopyxis carbonaria) ascocarps in response to the intensity of forest floor combustion during a wildfire. (1/1)

We studied the density of ascocarps (mushrooms) of morels (Morchella) and pixie cups (Geo-pyxis carbonaria) as a function of postfire duff (forest floor organic layer) depth in the first 4 y after a wildfire. The great majority of ascocarps of both species appeared in the first summer (2004) after an Aug 2003 fire in predominantly pine-spruce montane stands in Kootenay National Park, British Columbia. The spatial distribution of the ascocarps of both species was strongly biased toward (i) microsites with thin postfire duff and (ii) proximity to standing burned tree trunks. The bases of ascocarps of both species invariably were found just below the surface of the mineral soil. A field experiment in nearby intact forest showed that complete or partial duff removal in the absence of damage to the roots or crown did not lead to ascocarps of either species. We conclude that for both fungal species an unusually large abundance of ascocarps simultaneously requires damage to the associated trees and major duff reduction.  (+info)

Spontaneous combustion is a rare phenomenon where an object, usually containing high levels of carbon, ignites without an external heat source, often due to a chemical reaction that produces heat within the object. However, it's important to note that this term is not commonly used in medical literature or context.

Spontaneous combustion is not a recognized medical term. It refers to the phenomenon where a substance ignites spontaneously, without an external source of fire or heat. This is often associated with certain organic materials like hay, coal, or oily rags that decompose thermally and release heat, which can eventually lead to ignition under specific conditions.

However, there is no scientifically accepted evidence supporting the occurrence of human spontaneous combustion, where a person's body is said to catch fire without an external source of flame. This concept has appeared in some literature and folklore, but it is not supported by credible scientific research or medical evidence.

Coal is not a medical term; it is a geological term referring to a brown or black sedimentary rock that forms from the accumulation and preservation of plant materials, primarily used as a solid fuel for heat and electricity generation, but it does not have a direct relevance or application in the medical field.

I apologize for any confusion, but "coal" is not a medical term. Coal is a black or brownish-black sedimentary rock that is formed from the accumulation and preservation of plant materials, usually in a swamp environment. It is commonly used as a fuel source due to its high carbon content. If you have any questions about medical terminology or health-related topics, I would be happy to help answer them.

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