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- W1975256282 abstract "The same experimental apparatus and procedures as used in Part I[1] were utilized to study the carbonization process as it occurs for various biomaterials by the ESR technique. Coals of various ranks were heat treated and a system of curves was obtained of spin concentration I vs. HTT, which strongly indicates that the laboratory heat treatments are a continuation of the coalification process. Direct carbonization of plant and animal tissues shows that biomaterials as well as coals go through the carbonization C-radical formation and destruction process at about 100°C lower temperature than the nonbiological materials, thus forming a distinctive group of their own. A study of the kinetics of radical formation in coals and biomaterials give firm support to the assumption that the radical forming process in coals is identical with the process observed in laboratory carbonization, except that it occurs in the earth's crust at lower temperatures. Thus, it becomes possible to estimate the geological times of coal formation (or geological temperatures) by extrapolating the laboratory data. Some ESR peculiarities of biomaterials in carbonization are discussed." @default.
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- W1975256282 date "1988-01-01" @default.
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- W1975256282 title "ESR Studies of carbonization and coalification processes Part II. Biological materials" @default.
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- W1975256282 doi "https://doi.org/10.1016/0008-6223(88)90152-2" @default.
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