decomposition


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decomposition

 [de-kom″po-zish´un]
1. the separation of compound bodies into their constituent principles.
2. deterioration or decay of a substance.

pu·tre·fac·tion

(pyū'trĕ-fak'shŭn),
Decomposition or rotting, the breakdown of organic matter usually by bacterial action, resulting in the formation of other substances of less complex constitution with the evolution of ammonia or its derivatives and hydrogen sulfide; characterized usually by the presence of toxic or malodorous products.
Synonym(s): decay (2) , decomposition
[L. putre-facio, pp. -factus, to make rotten]

decomposition

(dē-kŏm′pə-zĭsh′ən)
n.
1. The act or result of decomposing; disintegration.
2.
a. Chemistry Separation into constituents by chemical reaction.
b. Biology Breakdown or decay of organic materials.

de·com′po·si′tion·al adj.

decomposition

The physical putrefaction and decay of a body, which is slowed by immersion in water (especially cold water) or burial (especially in drier soils).

General sequence of external decomposition
• Discolouration of lower abdominal wall, starting in right iliac fossa.
• Distension of abdomen by gas (spread of bowel organisms).
• Discolouration of dependent areas (generalised spread of bacteria to moistest tissues).
• Face and neck turn red and swell.
• “Marbling” branching pattern on skin due to bacterial colonisation of vessels and staining of vessel walls by haemolysis—occurring at ± 1 week of corpse in ambient temperature of 18–20°C.
• Skin blistering and slippage.
• Gross distension of the abdomen, face (protrusion of tongue and eyes) and scrotum.
• Bloody fluid leaks from orifices (2–3 weeks).
• Skin discolouration deepens to dark green or black.
• Maggot infestation with increased tissue destruction.
• Skin slippage from fingers and toes (hinders identification).

Internal decomposition
Proceeds more slowly, and differs by organ:
• Intestine, adrenals and pancreas autolyse within hours.
• Brain liquefies within a month (meningeal haemorrhage/haematoma usually persist).
• Body fat liquefies to yellow fluid filling body cavities.
• Softer tissues and viscera disintegrate over several months.
• Uterus, heart and prostate persist for the longest.
• Skeletalisation with tendons—12–18 months in temperate climate.
• “Bare-bone” skeletalisation—3 years in temperate climate.

pu·tre·fac·tion

(pyū'trĕ-fak'shŭn)
Decomposition or rotting, the breakdown of organic matter, usually by bacterial action, resulting in the formation of other substances of less complex constitution with the evolution of ammonia or its derivatives and hydrogen sulfide; characterized usually by the presence of toxic or malodorous products.
Synonym(s): decay (2) , decomposition.
[L. putre-facio, pp. -factus, to make rotten]

decomposition

Separation into chemical constituents or simpler compounds often as a result of bacterial enzymatic action.

decomposition

  1. the break-up of a chemical substance into two or more simpler substances.
  2. the breakdown of organic material by microorganisms.
References in periodicals archive ?
Structural decomposition of composite hydrogels during photocatalytic activity was examined by gravimetric, FTIR and SEM analyses.
Table 1 shows the duration of the five stages of rat carcass decomposition, which were generally similar to those of Moretti et al.
The decomposition temperature of ADCA can be decreased by using activators or promoters.
When Det Gda Fitzpatrick looked at those pages he found articles headed "The five stages of decomposition" and "How the human body decomposes after death".
Therefore, in this study a probability matrix decomposition based collaborative filtering algorithm was put forward to correct up the defects of the traditional collaborative filtering algorithm and performed simulation experiments.
On the basis of experimental studies, to determine the influence of thermal decomposition parameters of tetravanadate ammonium on the processes of phase formation of anticrystalline products of vanadium oxides ([V.sub.2][O.sub.5], V[O.sub.2]).
Economic inequality in PVA was decomposed by two methods: concentration index decomposition and Blinder-Oaxaca decomposition.
The Spectral Intrinsic Decomposition Method decomposes any signal into a combination of eigenvectors of a Partial Differential Equation (PDE) interpolation operator as presented in [5, 6].
The material decomposition problem in image domain can be described by the following equation:
Microbial communities are essential to maintaining soil quality because of their involvement in organic matter dynamics, nutrient cycling, and decomposition [9].
So how does that process of decomposition work from start to finish?
Kutz, Brunton, Brunton, and Proctor present readers with a collection of academic essays and scholarly papers focused on the method and applications of dynamic systems theory, focusing specifically on the dynamic mode decomposition (DMD) algorithm.