National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
The origin issue of the head of John the Baptist from Tajov
Hradilová, J. ; Bezúchová, E. ; Hradil, David ; Šídová, K.
The significant work of art, the Head of John the Baptist from Tajov, from the Museum of Central Slovakia in Banska Bystrica, which is probably part of the works of Niclaus Gerhaert von Leiden (1420/30 - 1475), was subject to conservation as well as detailed material analysis - first using non-invasive methods (radiography computer tomography, X-ray fluorescence), then laboratory analysis of taken samples (elemental and phase analysis, analysis of organic binders, dendrochronology, radiocarbon dating). The specific painting technique was described. Gilding of the head was performed without any ground only on brown preparatory layer for oil gilding (mixtion), however, the incarnates with an oily binder did contain a light dolomitic ground layer. The blood drops painting employed madder lake including sheep wool shearlings. The work consists of two parts - the head and the bowl, which was understood not to be original. Both parts are made from poplar wood. The results of the dating indicate that the head was created in the second half of the 15th century. The bowl could have been added later, but no later than the beginning of the 16th century. Its inclusion may have happened (albeit it is less probable) in the 17th century, but any period of time after that can be ruled out. The original colouring of the bowl was different the earth pigments of specific composition used in the ground layer imitated terracotta - a clay bowl. Based on the location of the existing hanging points the head was probably on display occasionally in a vertical position with a slight bottom view of 45 degrees.
Mineralogical and petrographic study of opuka stone from various constructional phases of the Church of the Beheading of St. John the Baptist in Dolní Chabry
Šídová, Kateřina ; Přikryl, Richard (advisor) ; Krutilová, Kateřina (referee)
The objective of this thesis is to determine the mineralogy and petrography of 13 'opuka' stone samples taken out from different construction phases of the Church of the Beheading of St. John the Baptist in Dolní Chabry. The analysis of a mineralogical composition and structural properties of the extracted samples alongside with a comparison of their physical characteristics provided a basis for estimation of the samples' origin within the construction phase. Methodology used for the samples analysis has been inspired by the methods described in project NAKI (no. DF13P01OVV008 ) also known as "Materiálový rozbor přírodního kamene - opuky - exaktními laboratorními metodami jako nástroj ke stanovení zdrojové oblasti". These methods includes besides macro and microscopic analysis also X-ray powder diffraction and high pressure mercury porosimetry which together provided a complete set of data about the samples. For the purpose of obtaining the general characteristic of the rock and the initial estimate of the content of mineral phases within it the optical microscopy was used. The results made it possible to classify the samples into four groups depending on content of a silica matrix. This in turn allowed to link some of the samples conclusively with some of the older construction phases of the site....
Tar sands exploitation in the Alberta Province, Canada and its environmental impact
Šídová, Kateřina ; Opluštil, Stanislav (advisor) ; Pešek, Jiří (referee)
This thesis provides an overview about the tar sands exploitation in the province of Alberta, Canada and environmental impacts related to their exploitation. Canadian's tar sands deposits represent the 3rd largest crude oil reserve in the world. The economically recoverable reserves were estimated to 168, 7 billion barrels. The introductory part of the thesis explains process of oil formation, including a theory about the tar sands deposits formation. The main part of the thesis describes four most significant tar sands deposits in the Alberta province which differ in physical-chemical properties of extracted crude oil (eg. specific gravity) but also in geology of their deposits. Differences in geological setting require individual approach to extraction of particular deposits. The most common exploitation methods are described. Among them, the surface mining results are the most apparent exploitation impact on a landscape and therefore the major environmental problems are presented through it.

See also: similar author names
1 Šidová, Karolina
2 Šídová, Kateřina
1 Šídová, Kornélie
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