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Color possibilities of artificial sandstones based on geopolymers
Lattenberg, Pavel ; Kalina, Lukáš (referee) ; Opravil, Tomáš (advisor)
This thesis deals with the possibility of preparing artificial sandstone based on geopolymer matrix and ways to achieve a natural appearance and good mechanical properties. The theoretical part is devoted to the current state of knowledge in the field of geopolymers and their recovery potential, but also the natural sandstone and its geographic diversity. The practical part deals with the preparation of various types of binding systems based on metakaolin, ground blast furnace slag and water glass. Their comparison, and the possibility the appearance and characteristics change in the composition of the filler.
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Determination of methanol derivatives in drying oils
Horká, Hana ; Hraníček, Jakub (advisor) ; Janoš, Pavel (referee)
The formation of metal carboxylates is a major problem for historical and contemporary paintings, and therefore understanding the mechanism of their formation is a crucial step for developing appropriate conservation strategies and preserving the world's cultural heritage. The determination of reactive components in drying oils is an important step towards understanding the reaction mechanism. This work is aimed at developing a simple and rapid methodology for HPLC-DAD determination of low molecular weight degradation products of traditional drying oils, namely methanol, formaldehyde and formic acid. In this work, QuEChERS conditions for the extraction of methanol, formaldehyde and formic acid from various oil samples (olive, walnut, poppy and linseed oils) were optimized followed by purification of the samples from the oil matrix using a commercial d-SPE sorbent (Z-Sep/C18) and two nanostructured sorbents, CeO2 and ZrO2.
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Color possibilities of artificial sandstones based on geopolymers
Lattenberg, Pavel ; Kalina, Lukáš (referee) ; Opravil, Tomáš (advisor)
This thesis deals with the possibility of preparing artificial sandstone based on geopolymer matrix and ways to achieve a natural appearance and good mechanical properties. The theoretical part is devoted to the current state of knowledge in the field of geopolymers and their recovery potential, but also the natural sandstone and its geographic diversity. The practical part deals with the preparation of various types of binding systems based on metakaolin, ground blast furnace slag and water glass. Their comparison, and the possibility the appearance and characteristics change in the composition of the filler.
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