Number of found documents: 371
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Developments strenght attained of the system metakaolinite – podium aluminite - quartz
Hájek, Pavel; Koloušek, D.; Andertová, J.
2009 - Czech
/: Geopolymer reactions have much in common with diagenetic transformations of the sedimentary rocks. Inside of laboratory conditions occur of geopolymer masses in alkali reaction of metakaolinite to sodium aluminate (Fastex 81) and quartz. As a result reaction is rise the zeolite phase (zeolite A) inside of relevant substance. The zeolite phase, temperature dressing materials and hydrothermal exposition influence developments strength. Results reaction were confirmed by means of X – ray diffractometry and SEM. Geopolymerní reakce mají mnoho společného s diagenetickými přeměnami sedimentárních hornin. V laboratorních podmínkách vznikají geopolymerní hmoty při alkalické reakci metakaolinitu a hlinitanu sodného (Fastex 81) a křemene. Jako výsledek reakce je objevení zeolitové fáze (zeolit A) v dané hmotě. Zeolitová fáze, tepelná úprava materiálu a hydrotermální expozice ovlivňuje trendy pevnosti. Výsledky reakce byli potvrzeny pomocí XRD a SEM. Keywords: geopolymer reactions; alkali reaction Available at various institutes of the ASCR
Developments strenght attained of the system metakaolinite – podium aluminite - quartz

/: Geopolymer reactions have much in common with diagenetic transformations of the sedimentary rocks. Inside of laboratory conditions occur of geopolymer masses in alkali reaction of ...

Hájek, Pavel; Koloušek, D.; Andertová, J.
Ústav struktury a mechaniky hornin, 2009

Biocompatibility optimization of fabric composites by calcium phosphates
Sochor, M.; Balík, Karel; Suchý, Tomáš; Sucharda, Zbyněk
2009 - English
Composite materials based on a polyamide fabric and a polydimethylsiloxane matrix were designed for application in bone surgery. In order to increase the bioactivity, 2, 5, 10, 15, 20 and 25 vol. % of nano/micro hydroxyapatite and tricalcium phosphate were added. The effect of the additives on the mechanical properties was studied. Simultaneously, changes in the inner structure of the composites were investigated by means of image analysis. Keywords: polydimethylsiloxane; aramid; hydroxyapatite Available at various institutes of the ASCR
Biocompatibility optimization of fabric composites by calcium phosphates

Composite materials based on a polyamide fabric and a polydimethylsiloxane matrix were designed for application in bone surgery. In order to increase the bioactivity, 2, 5, 10, 15, 20 and 25 vol. % of ...

Sochor, M.; Balík, Karel; Suchý, Tomáš; Sucharda, Zbyněk
Ústav struktury a mechaniky hornin, 2009

High pressure adsorption of HCI from gaseous mixture on artificial sorbent materials
Machač, P.; Balíček, P.; Bradáčová, K.; Koza, V.; Přibyl, Oldřich
2009 - Czech
High temperature adsorption of HCl was applied on simulated generator gas.The artificial sorption materials were based on CaO-Al2O3. Vysokoteplotní adsorpce HCl byla aplikována na modelovém plynu, který simuloval generátorový plyn vyráběný ze spalin dřeva. Pro adsorpci byly použíty uměle připravené sorbenty na bázi CaO-Al2O3. Keywords: flow gas; adsorption; HCl Available at various institutes of the ASCR
High pressure adsorption of HCI from gaseous mixture on artificial sorbent materials

High temperature adsorption of HCl was applied on simulated generator gas.The artificial sorption materials were based on CaO-Al2O3.

Machač, P.; Balíček, P.; Bradáčová, K.; Koza, V.; Přibyl, Oldřich
Ústav struktury a mechaniky hornin, 2009

Grant project solving and final summarization, Registration number of project: 102/07/0794, Name of project: Sensor of Rotational Movement around Vertical Axis for Seismology
Štrunc, Jaroslav
2009 - Czech
Within this project were developed prototypes of the seismic rotation motion based on the two principles and also a generator of rotational motion that can be used for seismic prospection. During the theoretical works and experiments we found that generator and sensor of rotational motion can be used in geophysical prospecting. V rámci tohoto projektu se podařilo jednak zkonstruovat a otestovat rotační senzory na dvou principech a dále připravit generátor rotačních kmitů pro testování a seismickou prospekci. Během teoretických analýz a praktických testů jsme objevili možnost použití rotačních vln jako prospekční metody. Keywords: rotation; seismograph; capacitive Available at various institutes of the ASCR
Grant project solving and final summarization, Registration number of project: 102/07/0794, Name of project: Sensor of Rotational Movement around Vertical Axis for Seismology

Within this project were developed prototypes of the seismic rotation motion based on the two principles and also a generator of rotational motion that can be used for seismic prospection. During the ...

Štrunc, Jaroslav
Ústav struktury a mechaniky hornin, 2009

Organic compounds in hardcoal waste piles studied by GC/MS and Py-GC/MS
Havelcová, Martina; Sýkorová, Ivana; Klika, Z.; Trejtnarová, Hana; Fojtíková, M.
2009 - Czech
GC/MS and Py-GC/MS techniques were used to provide information on set of samples from three waste piles localities in Czech Republic. Substituted and unsubstituted phenantrenes and other polycyclic aromatic hydrocarbons were comprised in sample extracts. The results were correlated with petrographic composition. GC/MS a Py-GC/MS techniky byly použity pro studium sady vzorků z uhelných odvalů ze tří lokalit České republiky. V extraktech ze vzorků byly nalezeny hlavně substituované a nesubstituované fenantreny a další polyaromatické uhlovodíky. Výsledky byly korelovány s petrografickou analýzou . Keywords: waste pile; hard coal; Py-GC/MS Available at various institutes of the ASCR
Organic compounds in hardcoal waste piles studied by GC/MS and Py-GC/MS

GC/MS and Py-GC/MS techniques were used to provide information on set of samples from three waste piles localities in Czech Republic. Substituted and unsubstituted phenantrenes and other polycyclic ...

Havelcová, Martina; Sýkorová, Ivana; Klika, Z.; Trejtnarová, Hana; Fojtíková, M.
Ústav struktury a mechaniky hornin, 2009

Carbon particles in mine-stone dumps after bituminous coals mining
Sýkorová, Ivana; Havelcová, Martina; Klika, Z.; Trejtnarová, Hana; Fojtíková, M.; Šulc, Alexandr
2009 - Czech
The influence of heating on optical properties and morphology of organic matter was studied in mine-stone dumps in three districts in the Czech Republic. Vliv zahřívání na optické vlastnosti a morfologii organické hmoty byl studován studovaný v odvarech ze tří uhelných revírů ČR. Keywords: coal; thermal akteration; self-heating Available at various institutes of the ASCR
Carbon particles in mine-stone dumps after bituminous coals mining

The influence of heating on optical properties and morphology of organic matter was studied in mine-stone dumps in three districts in the Czech Republic.

Sýkorová, Ivana; Havelcová, Martina; Klika, Z.; Trejtnarová, Hana; Fojtíková, M.; Šulc, Alexandr
Ústav struktury a mechaniky hornin, 2009

Al-enriched water from unsaturated zone of sandstone: The most acidified environment in the Czech Republic by the atmospheric deposition?
Bruthans, J.; Schweigstillová, Jana
2009 - Czech
The study describes chemistry and isotopic composition of water from unsaturated zone of sandstone. Studied waters are extremely acidified. Isotopic composition of H and O of studied waters lies at local line of meteoric water. Hlavním cílem této práce bylo popsat chemizmus a isotopického složení vody nenasycené zóny pískovců. Studované vody jsou extrémně acidifikované. Izotopové složení H a O studovaných vod leží na lokální linii meteorické vody. Keywords: acidification; isotopic composition; sandstone Available at various institutes of the ASCR
Al-enriched water from unsaturated zone of sandstone: The most acidified environment in the Czech Republic by the atmospheric deposition?

The study describes chemistry and isotopic composition of water from unsaturated zone of sandstone. Studied waters are extremely acidified. Isotopic composition of H and O of studied waters lies at ...

Bruthans, J.; Schweigstillová, Jana
Ústav struktury a mechaniky hornin, 2009

Particulate composites based on nano HA/TCP particles for bone graft replacements
Suchý, Tomáš; Rýglová, Šárka; Balík, Karel; Sucharda, Zbyněk; Denk, F.
2009 - English
Particulate composite materials have been developed for applications in the form of an intervertebral cage (for use in spine treatment). The intervertebral cage is composed of a bearing cage made of PEEK and a composite core with the surface contacting the bone surface and ensuring elastic linkage of two vertebral bodies, resulting in good adhesion to the bone. Mechanical analysis of different kinds of particulate composites was performed. The effect of hydroxyapatite and tri-calcium phosphate nanofiller volume fractions on the mechanical properties of particulate composites was investigated. Keywords: hydroxyapatite; tricalcium phosphate; particulate composite Available at various institutes of the ASCR
Particulate composites based on nano HA/TCP particles for bone graft replacements

Particulate composite materials have been developed for applications in the form of an intervertebral cage (for use in spine treatment). The intervertebral cage is composed of a bearing cage made of ...

Suchý, Tomáš; Rýglová, Šárka; Balík, Karel; Sucharda, Zbyněk; Denk, F.
Ústav struktury a mechaniky hornin, 2009

Bioinspired nanocomposite structures for bone tissue regeneration with gelatin nanofibres
Šupová, Monika; Hrušková, Daniela; Sucharda, Zbyněk; Svobodová, J.
2009 - English
Cílem této práce bylo připravit biologicky inspirovaný kompozitní materiál složený z želatinové matrice, želatinových nanovláken a z nanočástic hydroxyapatitu a ověření vlivu nanovláken na mechanické vlastnosti kompozitu. The aims of this work has been the preparation of bioinspired composite materials composed of gelatin matrix, gelatin nanofibers and hydroxyapaptite powder and verifying the influence of nanofibers on the mechanical properties of the composites. Keywords: composite; gelatin; hydroxyapatite Available at various institutes of the ASCR
Bioinspired nanocomposite structures for bone tissue regeneration with gelatin nanofibres

Cílem této práce bylo připravit biologicky inspirovaný kompozitní materiál složený z želatinové matrice, želatinových nanovláken a z nanočástic hydroxyapatitu a ověření vlivu nanovláken na mechanické ...

Šupová, Monika; Hrušková, Daniela; Sucharda, Zbyněk; Svobodová, J.
Ústav struktury a mechaniky hornin, 2009

Lignite deposits between Moravská Třebová and Kunštát, by Uhelná, Dolní Životice by Opava and in neighbourhood Brno
Pešek, J.; Sýkorová, Ivana
2009 - Czech
The petrographical and elemental composition and technological parameters of Cenomanian and Miocene lignite were discussed. Petrografické a prvkové složení a technologické parametry cenomanského a miocénního hnědého uhlí jsou diskutovány. Keywords: Cenomanian and Miocene lignite; geology; petrography Available at various institutes of the ASCR
Lignite deposits between Moravská Třebová and Kunštát, by Uhelná, Dolní Životice by Opava and in neighbourhood Brno

The petrographical and elemental composition and technological parameters of Cenomanian and Miocene lignite were discussed.

Pešek, J.; Sýkorová, Ivana
Ústav struktury a mechaniky hornin, 2009

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