Fat-wax transformation
Fatty-wax transformation, saponification (Latin saponificatio) - a post-mortem fixation process that takes place in a humid environment with complete absence of air, consisting in transforming adipose tissue into yellowish-brown adipocytes composed of hydrogenated acids Fats with calcium and magnesium soaps.
Fat is hard, can have a color from gray to brown. It is most often seen in the area of subcutaneous tissue, but can occur anywhere in adipose tissue. Saponification lasts from a few weeks to several months. The process involves endogenous lipases and bacterial enzymes (especially Clostridium perfringens).
The fat-wax transformation was first described by Sir Thomas Browne in his dissertation entitled Hydriotaphia, Urn Burial of 1658.
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