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Comprehensive methodology for non-destructive microanalysis of colour layers and micro-traces
Hradil, David ; Grygar, Tomáš ; Bezdička, Petr ; Kotrlý, M. ; Hradilová, J. ; Kolář, P. ; Turková, I. ; Svoboda, M. ; Kurková, H. ; Grünwaldová, Veronika ; Bláhová, Anna
Comprehensive methodology for non-destructive forensic expert examinations of microscopic samples of colour layers (i.e. fragments of lacquer systems in a broad sense, and similar materials) has been created. This comprehensive methodology encompasses sample preparation as polished sections and microtome slices, and subsequent set of non-destructive analytical methods (based on SEM, EDS, XRD, FTIR, optical microscopy and pattern analysis), which lead to identification and comparison of materials in one sample (without its exhausting or irreversible modifications). Implementation of this system into forensic-technical expert casework allows realisation of some types of expert examinations and, first and foremost, maintaining probative value of the evidence (with respect to non-destructive microanalytical procedures), primarily in terms of explaining crimes of extreme gravity in the field of violent and organized crime.
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Dating of cave sediments and reconstruction of karst morphology of the Nízké Tatry Mts
Kadlec, Jaroslav ; Danišík, M. ; Hercman, H. ; Pruner, Petr ; Chadima, Martin ; Schnabl, Petr ; Šlechta, Stanislav ; Grygar, Tomáš ; Granger, D.
The paleomagnetic polarities were measured both in clastic and chemogenic cave sediments preserved in eleven horizontal cave levels occur at different alitudes in the Jánska, Demänovská and Mošnica karst valleys in the Nízké Tatry Mts. Based on the obtained polarity data were are able to distinguish cave sediments deposited during the Brunhes, Matuyama and Gauss chrons. The stratigraphic interpretation was partly verified by U-series datings of speleothems preserved in the sedimentary sections. Except for the horizontal cave levels located in karst valleys, additional cave systems were formed at extremly high alitudes in the Nízké Tatry Mts. Preliminary data show predominantly reverse paleomagnetic orientations in fluvial activity in these caves and deposition of clastic sediments during Gilbert Chron.
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The modern method analysis pointings
Bezdička, Petr ; Grygar, Tomáš ; Kučková, Štěpánka ; Hradilová, J.
Baseline identification of pigments is not sufficient for the description of technical style of painting and its authentication. Qualified interpretation of the stratigraphy of colour layers accompanied by the description of their microstructure is only able to help with the evaluation of origin and authenticity of the painting. Wide comparative database and close cooperation of scientists, restorers and art historians is always necessary. Diversity of forms, in which titanium occurs in nature, could be given as an example documenting the necessity of highly professional and sensitive approach to data within this research area.
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The origin and forms of titanium in historical and modern paintings
Hradilová, J. ; Hradil, David ; Grygar, Tomáš ; Šímová, Veronika
Baseline identification of pigments is not sufficient for the description of technical style of painting and its authentication. Qualified interpretation of the stratigraphy of colour layers accompanied by the description of their microstructure is only able to help with the evaluation of origin and authenticity of the painting. Wide comparative database and close cooperation of scientists, restorers and art historians is always necessary. Diversity of forms, in which titanium occurs in nature, could be given as an example documenting the necessity of highly professional and sensitive approach to data within this research area.
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