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Soot in very low concentrations is capable of darkening surfaces or making particle agglomerates, such as those from ventilation systems, appear black. Soot is the primary cause of "ghosting", the discoloration of walls and ceilings or walls and flooring where they meet.
Mongolian spot is a congenital developmental condition—that is, one existing from birth—exclusively involving the skin.The blue colour is caused by melanocytes, melanin-containing cells, that are usually located in the surface of the skin (the epidermis), but are in the deeper region (the dermis) in the location of the spot. [6]
An individual practicing spodomancy by making marks in ashes. The marks are then interpreted for meaning, omens, and portents. Spodomancy (also known as tephramancy and tephromancy) is a form of divination by examining cinders, soot, or ashes (Greek: σποδός spodós), particularly although not exclusively from a ritual sacrifice.
In many hiding complexes, soot marks left by the lamp flame have been found. This important find makes it possible to determine if niches were used and for how long. The problem today, with the transformation of hiding complexes into tourist sites, is that many visitors place lamps in niches, erasing the original soot marks.
Due to the high artistic quality, and the exceptional state of conservation of the paintings, Sautuola was accused of forgery, as he was unable to answer why there were no soot (smoke) marks on the walls and ceilings of the cave. A fellow countryman maintained that the paintings had been produced by a contemporary artist, on Sautuola's orders.
Chimney sweeps' cancer, also called soot wart or scrotal cancer, is a squamous cell carcinoma of the scrotum. It has the distinction of being the first reported form of occupational cancer , and was initially identified by Percivall Pott in 1775. [ 1 ]
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In these samples, the contrail-producing soot particle count was reduced by 50 to 70 percent, using a 50% blend of conventional Jet A1 fuel and HEFA (hydroprocessed esters and fatty acids) biofuel produced from camelina. [8] [9] [10]