Chemical Composition of PM2.5 at Rural Backround Site Košetice
Schwarz, Jaroslav; Havránek, Vladimír
2011 - anglický PM2.5 generally represents fine fraction of atmospheric aerosol. Fine particles may remain in the atmosphere for days or even weeks and therefore they may be transported over long distances. Moreover, they may increase the background levels of atmospheric aerosol mass far from their origin. They have important adverse health effects and in the same time, they influence climate due to their direct and indirect effects on Earth radiative balance. To know the origin of PM2.5 aerosol, its chemical composition can serve as the diary of contacts with aerosol sources and transformations. Therefore it is necessary to study PM2.5 chemical composition if the fine aerosol sources should be revealed. A rural background site study can serve as a basis enabling to determine the real influence of larger sources like cities or an industry. Klíčová slova: PM2.5; elemental composition; chemical composition Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Chemical Composition of PM2.5 at Rural Backround Site Košetice

PM2.5 generally represents fine fraction of atmospheric aerosol. Fine particles may remain in the atmosphere for days or even weeks and therefore they may be transported over long distances. Moreover, ...

Schwarz, Jaroslav; Havránek, Vladimír
Ústav chemických procesů, 2011

Critical Notes on Heterogeneous Photocatalysis on TiO2 Photocatalysts
Klusoň, Petr; Hejda, S.
2011 - anglický In our recent works we described different types of titania based materials used as either colloids or thin films. These were functionally characterized in photo-induced electrochemical measurements and/or in photocatalytic oxidations. Special attention was paid to the effect of organized internal structure induced by templating principles as an alternative to plasma enhanced physical methods. Considerable work has also been undertaken on research of porphyrine based photoactive macromolecules, which are efficient producers of singlet oxygen species upon well defined illumination. Klíčová slova: titanium oxide; heterogeneous photocatalysis; thin films Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Critical Notes on Heterogeneous Photocatalysis on TiO2 Photocatalysts

In our recent works we described different types of titania based materials used as either colloids or thin films. These were functionally characterized in photo-induced electrochemical measurements ...

Klusoň, Petr; Hejda, S.
Ústav chemických procesů, 2011

Carbosilane Dendrimers Containing Titanium Complexes on Their Periphery
Strašák, Tomáš; Čermák, Jan
2011 - anglický Klíčová slova: carbosilane dendrimers; titanium complexes Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd. Carbosilane Dendrimers Containing Titanium Complexes on Their Periphery

Strašák, Tomáš; Čermák, Jan
Ústav chemických procesů, 2011

Excimer Laser-Induced CVD of Carbon Encapsulated Cobalt Nanoparticles
Fajgar, Radek; Maryško, Miroslav; Dřínek, Vladislav; Kupčík, Jaroslav; Šubrt, Jan
2011 - anglický Decomposition of acetylene / Co(CO)(3)(NO)mixtures induced by excimer ArF laser pulses is an efficient technique for preparation of amorphous cobalt nanoparticles encapsulated in carbon. Vacuum heating up to 900 degrees C leads to crystallization the metal core. The cobalt core crystallizes in a face-centered cubic (beta) form as revealed by X-ray and electron diffraction techniques and carbon affords graphite outer part. Properties of the Co(core) - carbon(shell)nanocomposites were examined by spectroscopy and microscopy techniques. Magnetization studies revealed paramagnetic behavior of the as-prepared amorphous deposit and superparamagnetic behavior of the annealed samples. Klíčová slova: amorphous cobalt nanoparticles; carbon encapsulation; magnetic properties Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Excimer Laser-Induced CVD of Carbon Encapsulated Cobalt Nanoparticles

Decomposition of acetylene / Co(CO)(3)(NO)mixtures induced by excimer ArF laser pulses is an efficient technique for preparation of amorphous cobalt nanoparticles encapsulated in carbon. Vacuum ...

Fajgar, Radek; Maryško, Miroslav; Dřínek, Vladislav; Kupčík, Jaroslav; Šubrt, Jan
Ústav chemických procesů, 2011

Adsorption Assisted Ion Exchanger Catalyst for Fatty Acid Esterification
Jeřábek, Karel; Holub, Ladislav; Hanková, Libuše; Corain, B.; Centomo, P.; Zecca, M.
2011 - anglický Klíčová slova: fatty acid; esterification Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Adsorption Assisted Ion Exchanger Catalyst for Fatty Acid Esterification

Jeřábek, Karel; Holub, Ladislav; Hanková, Libuše; Corain, B.; Centomo, P.; Zecca, M.
Ústav chemických procesů, 2011

Optimized Doped Titania for Photocatalysis Applications
Krejčíková, Simona; Kočí, K.; Obalová, L.; Čapek, L.; Šolcová, Olga
2011 - anglický This study is focused on preparation and characterization of the specially designed TIO2 and its modified versions (doped by metal) suitable for photodegradations of organic pollutants. Klíčová slova: titanium dioxide; siver; photocatalysis Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Optimized Doped Titania for Photocatalysis Applications

This study is focused on preparation and characterization of the specially designed TIO2 and its modified versions (doped by metal) suitable for photodegradations of organic pollutants.

Krejčíková, Simona; Kočí, K.; Obalová, L.; Čapek, L.; Šolcová, Olga
Ústav chemických procesů, 2011

Domain Averaged Fermi hole Orbitals for Extended Systems
Baranov, A.I.; Kohout, M.; Ponec, Robert
2011 - anglický Current contribution presents the results of DAFH orbital analysis for several simple model systems like hydrogen lattices as well as for prototypic real solids with covalent, ionic and metallic bonding. Klíčová slova: domain averaged fermi holes; bonding in solids Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Domain Averaged Fermi hole Orbitals for Extended Systems

Current contribution presents the results of DAFH orbital analysis for several simple model systems like hydrogen lattices as well as for prototypic real solids with covalent, ionic and metallic ...

Baranov, A.I.; Kohout, M.; Ponec, Robert
Ústav chemických procesů, 2011

Theoretical Interpretation of Enantioselectivity Trends in (R)-Ru-BINAP Catalyzed Hydrogenation of Methylacetoacetate in the QAS Ionic Liquid Phase
Dytrych, Pavel; Klusoň, Petr; Floriš, Tomáš; Lísal, Martin; Slater, M.
2011 - anglický An essential part of this work was focused on the role of the alkyl chain length in NR 222Tf2N and its reflection in the evaluated kinetic parameters. For this screening NR 222Tf2N was mixed with methanol using the one-to-one weight ratio. Klíčová slova: kinetic parameters; molecular simulation methods; evaluation Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Theoretical Interpretation of Enantioselectivity Trends in (R)-Ru-BINAP Catalyzed Hydrogenation of Methylacetoacetate in the QAS Ionic Liquid Phase

An essential part of this work was focused on the role of the alkyl chain length in NR 222Tf2N and its reflection in the evaluated kinetic parameters. For this screening NR 222Tf2N was mixed with ...

Dytrych, Pavel; Klusoň, Petr; Floriš, Tomáš; Lísal, Martin; Slater, M.
Ústav chemických procesů, 2011

A New Look on the Nernst Model in Electrochemistry
Wein, Ondřej
2011 - anglický The present paper is inspired by the electrodiffusion (ED) flow measurement, utilizing the limiting-diffusion regime (LDR) in two-electrode ED cells. The electrochemical testing and calibrations of the ED cells is based on two standard electrochemical techniques - quasi-steady voltammetry and voltage-step transient. Recently published theory of the voltage-step transient under simultaneous effect of Faradaic and Ohmic resistances is based on a suitably extended Nernst model. An analogous theory of the voltammetric experiment is presented here. Klíčová slova: nernst model of diffusion layer; primary current distribution; voltammetric curve Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. A New Look on the Nernst Model in Electrochemistry

The present paper is inspired by the electrodiffusion (ED) flow measurement, utilizing the limiting-diffusion regime (LDR) in two-electrode ED cells. The electrochemical testing and calibrations of ...

Wein, Ondřej
Ústav chemických procesů, 2011

Kogenerace s využitím biomasy, vhodné výkony a možnosti efektivního využití tepla
Svoboda, Karel
2011 - anglický Výhody a nevýhody kogenerace na bázi biomasy jsou srovnány se spolu-spalováním biomasy s fosilními palivy (uhlím). Vhodná paliva na bázi biomasy pro kogeneraci zahrnují hlavně dřevo a slámu, organické odpady, kaly z čistíren odpadních vod, odpadní rostlinné oleje a bioplyn. Spalování a zplyňování jsou nejpoužívanější termické procesy pro ko-generaci tepla a elektrické energie. Motory a plynové turbíny s vnitřním nebo vnějším spalováním, parní nebo ORC turbíny jsou nejobvyklejšími metodami pro kogeneraci. Palivové články vhodné pro kogeneraci jsou stále ve vývoji. Klíčová slova: biomass; cogeneration; efficiency Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Kogenerace s využitím biomasy, vhodné výkony a možnosti efektivního využití tepla

Výhody a nevýhody kogenerace na bázi biomasy jsou srovnány se spolu-spalováním biomasy s fosilními palivy (uhlím). Vhodná paliva na bázi biomasy pro kogeneraci zahrnují hlavně dřevo a slámu, ...

Svoboda, Karel
Ústav chemických procesů, 2011