National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Application of geochemical analysis in the research of chemical fossils
Havelcová, Martina ; Sýkorová, Ivana ; Trejtnarová, Hana
Biomarkers (also termed chemical fossils) are specific organic compounds in geological samples which are derived from biochemical precursors by reductive or oxidative alteration processes. Chemical structures of biomarkers can be related back to the original compounds and utilized as indicators of biogenic, paleoenvironmental and geochemical processes. Examples of identified biomarkers in several studied coals, sediments, and wood fossils remnants are presented.
Coalification – properties and classification of coal
Sýkorová, Ivana
The rank, properties and composition of peat and coal are discussed in relation to classification and utilization of coals.
Pyrolysis of coal/waste plastic mixtures in cokemaking
Melegy, A. ; Sýkorová, Ivana ; Kříž, Vlastimil ; Havelcová, Martina
In the recycling process of waste plastic using coke oven, sub-bituminous coal and added 5 vol. % of plastics are carbonized and changed into coke of optimal properties, tar and gas .

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