No (20)
Yes (2)
Number of found documents:
22
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to
Lead soaps in paintings: symptoms and the role of humidity
Garrappa, Silvia; Švarcová, Silvie; Kočí, Eva; Hradilová, J.; Bezdička, Petr; Hradil, David
2020 - English
In this study, an overview of the symptoms of lead soaps reported in artworks in combination\nwith the study of the role of humidity on the formation of these degradation products have\nbeen thoroughly investigated. The use of optical microscopy, scanning electron microscopy\n(SEM) in combination with Fourier-transform infrared spectroscopy (FTIR) proved to be an\nefficient analytical approach to highlight both the saponified area of artworks’ samples and the\nformation of metal carboxylates within mock-up model systems. Optical microscopy revealed\nto be very useful for the first screening of samples embedded in resin, while SEM helped in\nthe detection and distribution of elements within the cross-sections. On the other hand, FTIR\nmicroscope proved to be a very powerful instrument for high-resolution point measurements\nperformed in the attenuated total reflection mode (ATR) mode with mercury-cadmium-telluride\n(MCT) detector, as well as for chemical imaging of larger area of both artworks’ and mock-up\nsamples performed in the ATR mode with focal plane arrays (FPA) detector. This study provides\nnew useful insights contributing to better understanding of factors affecting the paints‘ stability,\nwhich is neccesary for developing new efficient strategies for preservation and restoration of\nfatty-based painted artworks.
Keywords:
lead soaps; paintings; oil; egg yolk; humidity
Available at various institutes of the ASCR
Lead soaps in paintings: symptoms and the role of humidity
In this study, an overview of the symptoms of lead soaps reported in artworks in combination\nwith the study of the role of humidity on the formation of these degradation products have\nbeen ...
Special concretes IV
Černý, Zbyněk
2020 - Czech
The subject of the research was special concrete for packaging files. Předmětem daného výzkumu byly speciální betony pro obalové soubory
Keywords:
inorganic materials; special concretes
Available at various institutes of the ASCR
Special concretes IV
The subject of the research was special concrete for packaging files.
New inorganic materials for shielding of ionizing radiation IV
Černý, Zbyněk
2020 - Czech
Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding. Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření.
Keywords:
inorganic materials; absorbents and moderators of neutrons; ionizing radiation
Available at various institutes of the ASCR
New inorganic materials for shielding of ionizing radiation IV
Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding.
Historic paint investigation of the Gierczyn parish church painted decoration in the context of the mining history of the region
Svorová Pawełkowicz, Sylwia; Witkowski, M.; Svora, Petr; Wagner, B.
2020 - English
The painted decoration of the Gierczyn parish church situated in the Izera Mountains was studied in the context of the rich mining history of the region known for tin, copper, and cobalt ores extraction. Smalt and copper pigments identification is discussed in the context of possible provenance studies. The aim is to determine to what extent the decoration of the parish church in Gierczyn reflects the mining history of the region and to verify whether local materials could have been used. Historic paint investigation is supported by chemical analysis of pigments. Additionally, the paper presents results of research combining archival studies of copper and cobalt extraction, and smalt production in nearby Przecznica, and of the parish church which was the main temple for local miners.
Keywords:
Przecznica (Querbach); Gierczyn (Giehren); mining history; smalt; copper pigments
Available at various institutes of the ASCR
Historic paint investigation of the Gierczyn parish church painted decoration in the context of the mining history of the region
The painted decoration of the Gierczyn parish church situated in the Izera Mountains was studied in the context of the rich mining history of the region known for tin, copper, and cobalt ores ...
New inorganic materials for shielding of ionizing radiation III
Černý, Zbyněk
2019 - Czech
Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding. Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření.\n
Keywords:
inorganic materials; absorbents and moderators of neutrons; ionizing radiation
Available at various institutes of the ASCR
New inorganic materials for shielding of ionizing radiation III
Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding.
Special concretes II
Černý, Zbyněk
2018 - Czech
The subject of the research was special concrete for packaging files. Předmětem daného výzkumu byly speciální betony pro obalové soubory.
Keywords:
inorganic materials; special concretes
Available at various institutes of the ASCR
Special concretes II
The subject of the research was special concrete for packaging files.
Characterization of hydrogenated silicon thin films and diode structures with integrated germanium nanoparticles
Stuchlík, J.; Fajgar, R.; Remeš, Z.; Kupčík, Jaroslav; Stuchlíková, H.
2018 - English
P-I-N diode structures based on the thin films of amorphous hydrogenated silicon (a-Si: H) deposited by Plasma Enhanced Chemical Vapor Deposition (PECVD) technique were prepared with embedded Si and Ge nanoparticles. The Reactive Laser Ablation (RLA) of germanium target was used to cover the intrinsic a-Si: H layer by Ge NPs under a low pressure of the silane. The RLA was performed using focused excimer ArF laser beam under SiH4 background atmosphere. Reaction between ablated Ge NPs and SiH4 led to formation of Ge NPs covered by thin GeSi: H layer. The deposited NPs were covered and stabilized by a-Si: H layer by PECVD. Those two deposition processes were alternated repeatedly. Volt-ampere characteristics of final diode structures were measured in dark and under illumination as well as their electroluminescence spectra.
Keywords:
PECVD; a-Si: H; PIN diode; Ge; nanoparticles
Available at various institutes of the ASCR
Characterization of hydrogenated silicon thin films and diode structures with integrated germanium nanoparticles
P-I-N diode structures based on the thin films of amorphous hydrogenated silicon (a-Si: H) deposited by Plasma Enhanced Chemical Vapor Deposition (PECVD) technique were prepared with embedded Si and ...
Combination of cobalt bis(dicarbollide) amino derivative and antibiotic effect on growth of staphylococcus epidermidis
Lokočová, K.; Vaňková, E.; Šícha, Václav; Masák, J.
2018 - English
Nosocomial infections are often caused by bacteria from the Staphylococcus genus. The clinically relevant representatives of this species are Staphylococcus epidermidis and Staphylococcus aureus which grow predominantly as surface-attached stable communities known as biofilms. Cells in these biofilms are often highly resistant to antibiotics. Therefore, new antimicrobial or antibiofilm substances are still being developed. In this study, we investigated the influence of cobalt bis(dicarbollide) or its amino derivatives, and antibiotics (erythromycin, tetracycline)-alone and in combination-to determine the antimicrobial activity and the inhibition of biofilm formation against three type strains of S. epidermidis. We used a microcultivation device to determine the minimum inhibitory concentrations and MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay to determine the metabolic activity of the cells in biofilms. We observed the synergistic effect of cobalt bis(dicarbollide) and its amino derivatives with both the antibiotics on both the planktonic and biofilm cells.
Keywords:
cobalt bis(dicarbollide); staphylococcus genus
Fulltext is available at external website.
Combination of cobalt bis(dicarbollide) amino derivative and antibiotic effect on growth of staphylococcus epidermidis
Nosocomial infections are often caused by bacteria from the Staphylococcus genus. The clinically relevant representatives of this species are Staphylococcus epidermidis and Staphylococcus aureus which ...
Special concretes
Černý, Zbyněk
2017 - Czech
The subject of the research was special concrete for packaging files. Předmětem daného výzkumu byly speciální betony pro obalové soubory.\n
Keywords:
inorganic materials; special concretes
Available at various institutes of the ASCR
Special concretes
The subject of the research was special concrete for packaging files.
New inorganic materials for shielding of ionizing radiation II
Černý, Zbyněk
2017 - Czech
Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding.\n Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření.\n
Keywords:
inorganic materials; absorbents and moderators of neutrons; ionizing radiation
Available at various institutes of the ASCR
New inorganic materials for shielding of ionizing radiation II
Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding.\n
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