Number of found documents: 7285
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Electrochemical Study of the Supported Iron Oxide Catalysts
Gál, M.; Horváth, B.; Navrátil, Tomáš
2018 - English
Propylene oxide (PO) belongs to the group of the most important chemical industrial\nintermediates. It is mainly used for polyurethanes, pharmaceuticals, textile, and detergent\nproduction. In this short contribution we tried to characterize supported iron(III) oxide\ncatalyst with different amount of Fe and to find an optimal iron(III) oxide content for the best\ncatalysts performance. The importance of phase quality on the selectivity of respective\ncatalysts samples is also discussed. Linear sweep voltammetry was chosen for this purpose.\nResults obtained by electrochemical methods are compared with efficiency (selectivity) of\nrespective catalysts. Keywords: Catalyst; Linear sweep voltammetry; Propylene oxide Available on request at various institutes of the ASCR
Electrochemical Study of the Supported Iron Oxide Catalysts

Propylene oxide (PO) belongs to the group of the most important chemical industrial\nintermediates. It is mainly used for polyurethanes, pharmaceuticals, textile, and detergent\nproduction. In this ...

Gál, M.; Horváth, B.; Navrátil, Tomáš
Ústav fyzikální chemie J. Heyrovského, 2018

HPLC-ED/UV with Solid Phase Extraction for the Determination of 5-Hydroxyindole-3-acetic Acid
Makrlíková, Anna; Dejmková, H.; Navrátil, Tomáš; Barek, J.; Vyskočil, V.
2018 - English
Determination of 5-HIAA in human urine was successfully performed using HPLC-ED/UV with SPE. HPLC-ED is a very sensitive technique, presented method does not need any sample pre-treatment apart from SPE procedure, which replaced filtration of samples of human urine to avoid problems with clogging a HPLC column. The found native\nconcentrations of 5-HIAA in human urine using HPLC-ED with SPE fully corresponds with published normal concentrations in urine (17.8 - 58.3 micromol l-1). The found native concentrations of 5-HIAA were 18.4 micromol L-1 (calculated from peak height). The presented method is fast and could be used for simple\nscreening of human urine, because HPLC-ED/UV allows simultaneous determination of 5-HIAA, HVA, and VMA as important tumour biomarkers. Keywords: HPLC; electrochemical detection; spectrophotometric detection Available at various institutes of the ASCR
HPLC-ED/UV with Solid Phase Extraction for the Determination of 5-Hydroxyindole-3-acetic Acid

Determination of 5-HIAA in human urine was successfully performed using HPLC-ED/UV with SPE. HPLC-ED is a very sensitive technique, presented method does not need any sample pre-treatment apart from ...

Makrlíková, Anna; Dejmková, H.; Navrátil, Tomáš; Barek, J.; Vyskočil, V.
Ústav fyzikální chemie J. Heyrovského, 2018

Book of Abstracts and Programme. Polymer Networks and Gels 2018 - Prague Meeting on Macromolecules /82./, Polymer Networks Group Meeting /24.
Dušková-Smrčková, Miroslava
2018 - English
The Book of abstracts and programme contains the summaries of all the contributions to the international conference “Polymer Networks and Gels”. The participants presented 95 lectures and 75 posters. Main conference topics were: Preparation and chemical design of networks and gels - Gelation, network formation, and properties - Polymer networks and gels at work/service. Keywords: polymer networks; polymer gels; hydrogels Available at various institutes of the ASCR
Book of Abstracts and Programme. Polymer Networks and Gels 2018 - Prague Meeting on Macromolecules /82./, Polymer Networks Group Meeting /24.

The Book of abstracts and programme contains the summaries of all the contributions to the international conference “Polymer Networks and Gels”. The participants presented 95 lectures and 75 posters. ...

Dušková-Smrčková, Miroslava
Ústav makromolekulární chemie, 2018

Determination of Optical Purity of Arylpropanoic Acids.
Cuřínová, Petra; Holakovský, R.; Izák, Pavel; Hájek, P.; Janků, K.
2018 - English
Keywords: arylpropanoic acids; metabolism; nmr spectroscopy Available in a digital repository NRGL
Determination of Optical Purity of Arylpropanoic Acids.

Cuřínová, Petra; Holakovský, R.; Izák, Pavel; Hájek, P.; Janků, K.
Ústav chemických procesů, 2018

Investigation of Single Molecule Charge Transport Properties and Geometrical Arrangement in Terpyridine Architectures Supported by the Tetraphenylmethane Tripod
Kolivoška, Viliam; Sebechlebská, Táňa; Šebera, Jakub; Gasior, Jindřich; Lindner, M.; Lukášek, J.; Valášek, M.; Mayor, M.; Mészáros, G.; Hromadová, Magdaléna
2018 - English
Tripodal platforms were engineered recently to realize a well-defined directional contact between metallic electrodes and molecular architectures dedicated to serve as working elements for electronic applications. In this work we employ cyclic voltammetry, scanning tunneling microscopy break junction technique and theoretical approaches based on the combination of density functional theory and non-equilibrium Green´s function to investigate the geometrical arrangement and single molecule charge transport in terpyridine-based architectures supported by tetraphenylmethane tripod. We demonstrate that this architecture adopts a favorable geometrical arrangement capable of forming highly conductive molecular junctions and is thus suitable to serve as a basis for working molecular switches. Keywords: molecular electronics; Molecular conductors and switches; Tripodal platforms Available at various institutes of the ASCR
Investigation of Single Molecule Charge Transport Properties and Geometrical Arrangement in Terpyridine Architectures Supported by the Tetraphenylmethane Tripod

Tripodal platforms were engineered recently to realize a well-defined directional contact between metallic electrodes and molecular architectures dedicated to serve as working elements for electronic ...

Kolivoška, Viliam; Sebechlebská, Táňa; Šebera, Jakub; Gasior, Jindřich; Lindner, M.; Lukášek, J.; Valášek, M.; Mayor, M.; Mészáros, G.; Hromadová, Magdaléna
Ústav fyzikální chemie J. Heyrovského, 2018

Influence of Adsorption on Electrochemical Reduction of Pyridinium Derivatives
Nováková Lachmanová, Štěpánka; Dupeyre, G.; Lainé, P. P.; Hromadová, Magdaléna
2018 - English
Two expanded pyridinium-based compounds 1 and 2 were studied by cyclic voltammetry in two different environments. The nonaqueous solution suppresses the adsorption of the compounds on the electrode surface. Adsorption process in aqueous environment was confirmed by typical shape of the curve as well as by the linear dependence of peak current on the scan rate. The shift of standard redox potential in aqueous solution compared to nonaqueous environment toward more negative potential indicates the adsorption of reactant on the electrode surface. Larger shift observed for flat conjugated molecule 1 confirms its stronger adsorption than for the second molecule. Keywords: pyridinium derivatives; adsorption; cyclic voltammetry Available at various institutes of the ASCR
Influence of Adsorption on Electrochemical Reduction of Pyridinium Derivatives

Two expanded pyridinium-based compounds 1 and 2 were studied by cyclic voltammetry in two different environments. The nonaqueous solution suppresses the adsorption of the compounds on the electrode ...

Nováková Lachmanová, Štěpánka; Dupeyre, G.; Lainé, P. P.; Hromadová, Magdaléna
Ústav fyzikální chemie J. Heyrovského, 2018

Study of Metabolism of Synthetic Cannabinoids. Electrochemical Properties of JWH-018
Obluková, Michaela; Sokolová, Romana; Čabala, R.
2018 - English
In the recent years, many new substances have appeared in the drug market, which are abused for their psychoactive effect. They serve as alternative to classical drugs (heroin, cocaine, ecstasy) due to their legal status. The great concern is the ineffectiveness of the current methods of toxicological screening of biological samples to identify these new compounds. It is essential to know the metabolism pathway of these psychoactive substances for a development of a new efficient method for their detection. This report is devoted to understanding of oxidation and reduction mechanism of JWH-018 and JWH-250 by means of cyclic voltammetry and to identification of their redox products. Keywords: synthetic cannabinoids; metabolism; cyclic voltammetry Available at various institutes of the ASCR
Study of Metabolism of Synthetic Cannabinoids. Electrochemical Properties of JWH-018

In the recent years, many new substances have appeared in the drug market, which are abused for their psychoactive effect. They serve as alternative to classical drugs (heroin, cocaine, ecstasy) due ...

Obluková, Michaela; Sokolová, Romana; Čabala, R.
Ústav fyzikální chemie J. Heyrovského, 2018

Miniaturized Boron Doped Diamond Film Electrode for Neuroblastoma Biomarkers Determination
Hrdlička, Vojtěch; Barek, J.; Navrátil, Tomáš; Taylor, Andrew
2017 - English
Cathodically pretreated miniaturized boron doped diamond film\nelectrode was successfully tested for the purposes of in-situ determination\nof neuroblastoma biomarkers after hollow-fibre based\nmicroextraction. Electrode was tested using K3[Fe(CN)6] and vanillylmandelic\nacid as model substances . Limits of detection and\ndetermination are 2.2 and 6.6 mu mol L-1, respectively. Linear range was\n2.2-100 mu mol L-1, repeatability 1.34% (n = 10). Keywords: biomarkers; boron doped diamond film; voltammetry Available on request at various institutes of the ASCR
Miniaturized Boron Doped Diamond Film Electrode for Neuroblastoma Biomarkers Determination

Cathodically pretreated miniaturized boron doped diamond film\nelectrode was successfully tested for the purposes of in-situ determination\nof neuroblastoma biomarkers after hollow-fibre ...

Hrdlička, Vojtěch; Barek, J.; Navrátil, Tomáš; Taylor, Andrew
Ústav fyzikální chemie J. Heyrovského, 2017

Development and optimization of the production of recombinant epimerases for pharmaceutical industry. Scale-up of a submerged cultivation technology and down-stream processing
Prell, Aleš; Kujan, Petr; Sobotka, Miroslav; Šafář, Hynek; Vavruška, Tomáš
2017 - English
Development and optimization of the production of recombinant epimerases for pharmaceutical industry. Scale-up of a submerged cultivation technology and down-stream processing. Keywords: enzyme production Available at various institutes of the ASCR
Development and optimization of the production of recombinant epimerases for pharmaceutical industry. Scale-up of a submerged cultivation technology and down-stream processing

Development and optimization of the production of recombinant epimerases for pharmaceutical industry. Scale-up of a submerged cultivation technology and down-stream processing.

Prell, Aleš; Kujan, Petr; Sobotka, Miroslav; Šafář, Hynek; Vavruška, Tomáš
Mikrobiologický ústav, 2017

Komplexní průzkum rybí obsádky jezera Most v roce 2016
Peterka, Jiří
2017 - Czech
Cílem ichtyologického průzkumu jezera Most bylo zmapování stavu a vývoje rybí obsádky, přičemž důraz byl kladen zejména na odhad početnosti a biomasy jednotlivých druhů ryb, na odhad rizik dalšího vývoje rybí obsádky a doporučení dalšího obhospodařování jezera. Sumarizace dosažených výsledků a návrh doporučení pro další sledování jsou obsahem předkládané zprávy. Aim of the complex ichthyological survey of Lake Most was to map the current state and succession of lake’s fish stock with particular emphasis put on abundance and biomass estimates of all fish species, evaluation of possible risks to the further development of the fish stock and recommendations for the lake management. Summarization of achieved results and recommendations for further monitoring are included in the presented report. Keywords: revitalization; community succession; ecosystem monitoring Available at various institutes of the ASCR
Komplexní průzkum rybí obsádky jezera Most v roce 2016

Cílem ichtyologického průzkumu jezera Most bylo zmapování stavu a vývoje rybí obsádky, přičemž důraz byl kladen zejména na odhad početnosti a biomasy jednotlivých druhů ryb, na odhad rizik dalšího ...

Peterka, Jiří
Biologické centrum, 2017

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