Number of found documents: 684
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Understanding the Principles of Diastereomeric Complexes of Chiral Urea Derivatives.
Cuřínová, Petra; Jakubec, Martin; Storch, Jan; Holakovský, R.
2017 - English
The main target of this work based on the NMR studies is to elucidate the structural principles which are responsible for the action of the chiral selectors at hand, and thus to be able to predict the new promising structures useful as NMR shift reagents. Keywords: NMR solvating agent; chiral recognition; diastereomeri complex Available in a digital repository NRGL
Understanding the Principles of Diastereomeric Complexes of Chiral Urea Derivatives.

The main target of this work based on the NMR studies is to elucidate the structural principles which are responsible for the action of the chiral selectors at hand, and thus to be able to predict the ...

Cuřínová, Petra; Jakubec, Martin; Storch, Jan; Holakovský, R.
Ústav chemických procesů, 2017

Usage of GP750 Gasifier for Combined Heat and Power Production.
Brynda, J.; Skoblia, S.; Pohořelý, Michael; Beňo, Z.; Moško, Jaroslav
2017 - English
Contribution presents experiences with long-therm operation of GP750 gasifiers in the combined heat and power plant Kozomín. Keywords: gasification; biomass; combined heat and power production Available in a digital repository NRGL
Usage of GP750 Gasifier for Combined Heat and Power Production.

Contribution presents experiences with long-therm operation of GP750 gasifiers in the combined heat and power plant Kozomín.

Brynda, J.; Skoblia, S.; Pohořelý, Michael; Beňo, Z.; Moško, Jaroslav
Ústav chemických procesů, 2017

Changes in Sub-micron Number Size Distributions at Czech Rural and Urban Background Stations in the Last Ten Years.
Zíková, Naděžda; Ondráček, Jakub; Wagner, Zdeněk; Ždímal, Vladimír
2017 - English
In this work, not only total concentrations are evaluated, but also particle number size distributions (PNSD) are compared in the last decade at the two stations, and possible explanations for the change in concentrations and PNSD changes are looked for. Additionally, also the change in the frequency and strength of the NPF events is evaluated.\n Keywords: SMPS; long-term measurement; rural background Available in a digital repository NRGL
Changes in Sub-micron Number Size Distributions at Czech Rural and Urban Background Stations in the Last Ten Years.

In this work, not only total concentrations are evaluated, but also particle number size distributions (PNSD) are compared in the last decade at the two stations, and possible explanations for the ...

Zíková, Naděžda; Ondráček, Jakub; Wagner, Zdeněk; Ždímal, Vladimír
Ústav chemických procesů, 2017

Kinetics of Keratin Acidic Hydrolysis in Batch Autoclave.
Hanika, Jiří; Kaštánek, P.; Rousková, Milena; Šabata, Stanislav; Šolcová, Olga
2017 - English
The contribution brings novel data on the non-traditional process presented during previous ICCT 2015 conference1. According to the patent application2 the hydrolysis of waste chicken feathers was performed in a reaction mixture containing water and a soluble acid catalyst with the pKa value lower than 4, in a stirred batch reactor for 0.5 to 10 hours, in the temperature range from 90 to 130°C and at the pertinent vapour pressure of reaction mixture. Kinetics of preparing a mixture of proteins and amino acids by hydrolysis of a waste material containing chicken feathers was investigated in this study.\n Keywords: batch autoclave; reaction micture; experiments Available in a digital repository NRGL
Kinetics of Keratin Acidic Hydrolysis in Batch Autoclave.

The contribution brings novel data on the non-traditional process presented during previous ICCT 2015 conference1. According to the patent application2 the hydrolysis of waste chicken feathers was ...

Hanika, Jiří; Kaštánek, P.; Rousková, Milena; Šabata, Stanislav; Šolcová, Olga
Ústav chemických procesů, 2017

Use of Water-Modified Supercritical Carbon Dioxide for Direct Preparation of CrystallineMonolithic TiO2 Aerogels.
Cerhová, Marie
2017 - English
We studied a combination of supercritical CO2 and water for the preparation of crystalline and pure nanostructured TiO2 without any thermal processing. The effect of temperature (40–100 °C) and pressure (10–30 MPa) on the purity, structural and textural properties was investigated.\n\n\n Keywords: carbon dioxide; TiO2; pressure Available in a digital repository NRGL
Use of Water-Modified Supercritical Carbon Dioxide for Direct Preparation of CrystallineMonolithic TiO2 Aerogels.

We studied a combination of supercritical CO2 and water for the preparation of crystalline and pure nanostructured TiO2 without any thermal processing. The effect of temperature (40–100 °C) and ...

Cerhová, Marie
Ústav chemických procesů, 2017

Helicene-based Thioureas.
Jakubec, Martin
2017 - English
The main goal of this work was to introduce the helicene moiety into the structure of bis(aryl)thiourea, to prepare a new type of a helicene-based organocatalyst. Several aryl(helicenyl)thioureas were synthesized so far. Their ability to form hydrogen-bond complexes with various types of substrates was verified using NMR and the activity of the catalysts is currently being explored.\n Keywords: helicene moiety; ability; nmr Available in a digital repository NRGL
Helicene-based Thioureas.

The main goal of this work was to introduce the helicene moiety into the structure of bis(aryl)thiourea, to prepare a new type of a helicene-based organocatalyst. Several aryl(helicenyl)thioureas were ...

Jakubec, Martin
Ústav chemických procesů, 2017

High-Temperature Desulfurization of a Producer Gas by La- and Ce-based Oxides.
Brynda, Jiří
2017 - English
Keywords: desulfurization; oxide fuel cells; sorbents Available in a digital repository NRGL
High-Temperature Desulfurization of a Producer Gas by La- and Ce-based Oxides.

Brynda, Jiří
Ústav chemických procesů, 2017

Sezónní porovnání těkavosti atmosférického aerosolu na pozaďové stanici Košetice.
Kubelová, Lucie; Vodička, Petr; Makeš, Otakar; Zíková, Naděžda; Ondráček, Jakub; Schwarz, Jaroslav; Ždímal, Vladimír
2017 - Czech
Těkavost atmosférického aerosolu je důležitou veličinou, neboť nám dává informace o zdroji, životnosti a způsobu odstranění částic z atmosféry. Přesný popis těkavosti aerosolu je také důležitý pro modelování kondenzace částečně těkavých sloučenin a také umožňuje lepší identifikaci zdrojů aerosolu (Wu et al., 2009). Nicméně, naše znalosti problematiky těkavosti atmosférických organických aerosolů a s tím souvisejících procesů jsou stále značně omezené. (Han et al., 2016). Volatility is an important characteristic of atmospheric aerosols as it affects their origin, lifetime and removal. Accurate description of aerosol volatilities is important for models calculating condensation of semi-volatile species and it also enables better identification of aerosol sources (Wu et al., 2009). However, our understanding of volatilities of organic atmospheric aerosols and the related processes is still rather poor (Han et al., 2016. Keywords: organic atmospheric aerosols; volatility; aerosol sources Available in a digital repository NRGL
Sezónní porovnání těkavosti atmosférického aerosolu na pozaďové stanici Košetice.

Těkavost atmosférického aerosolu je důležitou veličinou, neboť nám dává informace o zdroji, životnosti a způsobu odstranění částic z atmosféry. Přesný popis těkavosti aerosolu je také důležitý pro ...

Kubelová, Lucie; Vodička, Petr; Makeš, Otakar; Zíková, Naděžda; Ondráček, Jakub; Schwarz, Jaroslav; Ždímal, Vladimír
Ústav chemických procesů, 2017

Breaking of Rod-shaped Model Material during Compression.
Kulaviak, Lukáš; Pěnkavová, Věra; Růžička, Marek; Punčochář, Miroslav; Zámostný, P.; Grof, Z.; Štěpánek, F.; Schöngut, M.; Havlica, Jaromír
2017 - English
The breakage of a model anisometric dry granular material caused by uniaxial compression was studied. The bed of uniform rod-like pasta particles (8 mm long, aspect ratio 1:8) was compressed (Gamlen Tablet Press) and their size distribution was measured after each run (Dynamic Image Analysing). The compression dynamics was recorded and the effect of several parameters was tested (rate of compression, volume of granular bed, pressure magnitude and mode of application). Besides the experiments, numerical modelling of the compressed breakable material was performed as well, employing the DEM approach (Discrete Element Method). The comparison between the data and the model looks promising. Keywords: granular material; numerical modelling; compression Available in a digital repository NRGL
Breaking of Rod-shaped Model Material during Compression.

The breakage of a model anisometric dry granular material caused by uniaxial compression was studied. The bed of uniform rod-like pasta particles (8 mm long, aspect ratio 1:8) was compressed (Gamlen ...

Kulaviak, Lukáš; Pěnkavová, Věra; Růžička, Marek; Punčochář, Miroslav; Zámostný, P.; Grof, Z.; Štěpánek, F.; Schöngut, M.; Havlica, Jaromír
Ústav chemických procesů, 2017

Malé rozměrem, velké významem.
Ždímal, Vladimír
2017 - Czech
Keywords: atmospheric aerosols; global change; indoor sources Available in a digital repository NRGL
Malé rozměrem, velké významem.

Ždímal, Vladimír
Ústav chemických procesů, 2017

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