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Nové anorganické materiály stínící ionizující záření IV
Černý, Zbyněk
2020 - Czech
Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření. Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding.
Keywords:
inorganic materials; absorbents and moderators of neutrons; ionizing radiation
Available at various institutes of the ASCR
Nové anorganické materiály stínící ionizující záření IV
Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření....
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 ...
Nové anorganické materiály stínící ionizující záření III
Černý, Zbyněk
2019 - Czech
Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření.\n Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding.
Keywords:
inorganic materials; absorbents and moderators of neutrons; ionizing radiation
Available at various institutes of the ASCR
Nové anorganické materiály stínící ionizující záření III
Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření.\n...
Speciální betony II
Černý, Zbyněk
2018 - Czech
Předmětem daného výzkumu byly speciální betony pro obalové soubory. The subject of the research was special concrete for packaging files.
Keywords:
inorganic materials; special concretes
Available at various institutes of the ASCR
Speciální betony II
Předmětem daného výzkumu byly speciální betony pro obalové soubory.
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 ...
Speciální betony
Černý, Zbyněk
2017 - Czech
Předmětem daného výzkumu byly speciální betony pro obalové soubory.\n The subject of the research was special concrete for packaging files.
Keywords:
inorganic materials; special concretes
Available at various institutes of the ASCR
Speciální betony
Předmětem daného výzkumu byly speciální betony pro obalové soubory.\n
The subject of the research was special concrete for packaging files.
Nové anorganické materiály stínící ionizující záření II
Černý, Zbyněk
2017 - Czech
Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření.\n Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding.\n
Keywords:
inorganic materials; absorbents and moderators of neutrons; ionizing radiation
Available at various institutes of the ASCR
Nové anorganické materiály stínící ionizující záření II
Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření.\n...
The deposition of germanium nanoparticles on hydrogenated amorphous silicon.
Stuchlík, J.; Volodin, V.A.; Shklyaev, A.A.; Stuchlikova, T.H.; Ledinsky, M.; Čermák, J.; Kupčík, Jaroslav; Fajgar, R.; Mortet, V.; More-Chevalier, J.; Ashcheulov, P.; Purkrt, A.; Remeš, Z.
2017 - English
We reveal the mechanism of Ge nanoparticles (NPs) formation on the surface of the hydrogenated amorphous silicon (a-Si:H) deposited by Plasma Enhanced Chemical Vapor Deposition (PECVD) on ITO and a on boron doped nanocrystalline diamond (BDD). The coating of Ge NPs on a-Si:H was performed by molecular beam epitaxy (MBE) at temperatures up to 450 degrees C. The Ge NPs were characterized by Raman spectroscopy, scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM). The nanocrystalline Ge particles are conglomerates of nanocrystals of size 10-15 nm and quantum dots (QDs) with size below 2 nm embedded in amorphous Ge phase. After coating with Ge NPs the a-Si:H thin films show better adhesion on BDD substrates then on ITO substrates.
Keywords:
Ge nanoparticles; a-Si:H; PECVD; MBE
Available at various institutes of the ASCR
The deposition of germanium nanoparticles on hydrogenated amorphous silicon.
We reveal the mechanism of Ge nanoparticles (NPs) formation on the surface of the hydrogenated amorphous silicon (a-Si:H) deposited by Plasma Enhanced Chemical Vapor Deposition (PECVD) on ITO and a on ...
The origin issue of the head of John the Baptist from Tajov
Hradilová, J.; Bezúchová, E.; Hradil, David; Šídová, K.
2017 - English
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.
Keywords:
Niclaus Gerhaert von Leiden; non-invasive analysis; painting technique; radiocarbon dating
Available at various institutes of the ASCR
The origin issue of the head of John the Baptist from Tajov
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 ...
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