Number of found documents: 7113
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Book of abstract of XXIIIrd Symposium of immunology and biology of reproduction
Kubátová, Alena
2017 - English
This Symposium was mainly focused on diabetes melllitus type 1 (mouse and human model), gene expression during spermatogenesis and spermiogenesis,\nrole of tetraspanins family and other proteins in sperm-egg interaction, role of estrogen receptors (sperm cells) and bisphenol S (oocytes). Keywords: reproduction; sperm-egg interaction; tetraspanins; estrogen receptors; CD molecules; diabetes mellitus; oocytes; sperm surface molecules; bisphenol S; gene expression Available at various institutes of the ASCR
Book of abstract of XXIIIrd Symposium of immunology and biology of reproduction

This Symposium was mainly focused on diabetes melllitus type 1 (mouse and human model), gene expression during spermatogenesis and spermiogenesis,\nrole of tetraspanins family and other proteins in ...

Kubátová, Alena
Biotechnologický ústav, 2017

Characterization of Aerosol Generated by Laser Ablation for Inductively Coupled Plasma Mass Spectroscopy.
Holá, M.; Ondráček, Jakub; Nováková, H.; Vojtíšek, M.; Šperka, J.; Havlíček, M.; Kanický, V.
2017 - English
Laser ablation (LA), together with inductively coupled plasma mass spectrometry (ICP-MS) as a detection system, has become a routine method for the direct analysis of various solid samples. The product of laser ablation contains a mixture of vapour, droplets and solid particles. All components are finally transported to a plasma by a carrier gas in form of dry aerosol that includes mainly agglomerates of primary nanoparticles. Dry aerosol can be studied by different offline or online techniques. In general, characterisation of aerosols by their particle size distribution (PSD) represents indispensable tool for fundamental studies of the interaction of laser radiation with various materials. Many works have studied PSD of dry aerosol for different samples, and different ablation conditions (Hola et al., 2010).The laser ablation was performed with nanosecond laser (193 nm) on glass and steel samples using various ablation conditions (spot size, ablation mode, repetition rate, fluence). The aerosol characterization was made first by online PSD monitoring using Engine Exhaust Particle Sizer (EEPS) simultaneously with laser ablation - ICP-MS analysis. Second, the structure of the laser-generated particles was studied off-line using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Keywords: laser ablation; ICP-MS; EEPS Available in a digital repository NRGL
Characterization of Aerosol Generated by Laser Ablation for Inductively Coupled Plasma Mass Spectroscopy.

Laser ablation (LA), together with inductively coupled plasma mass spectrometry (ICP-MS) as a detection system, has become a routine method for the direct analysis of various solid samples. The ...

Holá, M.; Ondráček, Jakub; Nováková, H.; Vojtíšek, M.; Šperka, J.; Havlíček, M.; Kanický, V.
Ústav chemických procesů, 2017

Transformation of Aerosol Particles during Transport from Outdoor to Indoor Environment.
Ondráček, Jakub; Talbot, Nicholas; Kubelová, Lucie; Makeš, Otakar; Cusack, Michael; Schwarz, Jaroslav; Vodička, Petr; Zíková, Naděžda; Ždímal, Vladimír
2017 - English
One summer (2014) and one winter (2015) campaign (both lasting three weeks) were conducted to assess the indoor/outdoor physical and chemical properties of aerosol in an unoccupied apartment. The main purpose of these campaigns was to observe the changes in aerosol particles before and after their transport from outdoors to indoors. The most important parameter – the I/O ratio was obtained from indoor/outdoor measurements of aerosol number size distribution as well as chemical composition. The I/O ratios can reveal the changes in particle size and physicochemical characteristics indoors in relation to the size distribution and chemical composition outdoors, and physical parameters such as wind speed, temperature, and RH. Keywords: aerosol transformation; size distribution; chemical composition Available in a digital repository NRGL
Transformation of Aerosol Particles during Transport from Outdoor to Indoor Environment.

One summer (2014) and one winter (2015) campaign (both lasting three weeks) were conducted to assess the indoor/outdoor physical and chemical properties of aerosol in an unoccupied apartment. The main ...

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

The Comparison of Sulfide Alumina-Supported Cytalysts in Rapeseed OIl HydrodeOxygenation.
Kaluža, Luděk; Kubička, D.
2017 - English
The empirical pseudo-first order rate constant of the hydrocarbons (Hcs) product formation (kHc) increased in the order Ni/Al2O3, Co/Al2O3,CoMo/Al2O3, Mo/Al2O3, NiMo/Al2O3 showing hence a significant synergy between Ni and Mo. Keywords: hydrodeoxygenation; sulfide catalysts; rapeseed oil Available in a digital repository NRGL
The Comparison of Sulfide Alumina-Supported Cytalysts in Rapeseed OIl HydrodeOxygenation.

The empirical pseudo-first order rate constant of the hydrocarbons (Hcs) product formation (kHc) increased in the order Ni/Al2O3, Co/Al2O3,CoMo/Al2O3, Mo/Al2O3, NiMo/Al2O3 showing hence a significant ...

Kaluža, Luděk; Kubička, D.
Ústav chemických procesů, 2017

Silica-Alumina Supported Catalysts in Hydrodesulfurization of 4,6-Dimethyldibenzothiophene and 1-Benzotiophene Parallel with Hydrodeoxygenation of Octanoic Acid.
Gulková, Daniela; Vít, Zdeněk; Kaluža, Luděk
2017 - English
HDS on Pd-Pt catalysts proceeded almost exclusively by the hydrogenation (HYD) route. Activities of majority of Pd-Pt catalysts correlated with their Brønsted acidities while not with metal dispersion2. The studied sulfidic CoMo phase increased DDS route (formation of DMBP) and results in similar HDS/HDO activity and selectivity (kEB/kHC) as the reference Al2O3 supported counterpart. We believe that high acidity of MSAs positively influence hydrorafination of 4,6-DMDBT and oxygen (OA) containing feeds, which motivate our forthcoming research. Keywords: catalysts; acidity; oxygen Available in a digital repository NRGL
Silica-Alumina Supported Catalysts in Hydrodesulfurization of 4,6-Dimethyldibenzothiophene and 1-Benzotiophene Parallel with Hydrodeoxygenation of Octanoic Acid.

HDS on Pd-Pt catalysts proceeded almost exclusively by the hydrogenation (HYD) route. Activities of majority of Pd-Pt catalysts correlated with their Brønsted acidities while not with metal ...

Gulková, Daniela; Vít, Zdeněk; Kaluža, Luděk
Ústav chemických procesů, 2017

A Kitchen Degreaser Containing Monoethanolamine Can Alter Indoor Aerosol Composition for Days.
Schwarz, Jaroslav; Makeš, Otakar; Ondráček, Jakub; Cusack, Michael; Talbot, Nicholas; Vodička, Petr; Kubelová, Lucie; Ždímal, Vladimír
2017 - English
Using of such degreaser and consequences related to indoor aerosol are described in this study. Monoethanolamine, a part of a commercial degreaser being used in kitchens, was able to replace ammonium in its sulfate and nitrate salts in the indoor environment, while those salts usually form up to half of PM2.5 aerosol mass indoors. Keywords: indoor aerosols; chemical transformation; aminium salts Available in a digital repository NRGL
A Kitchen Degreaser Containing Monoethanolamine Can Alter Indoor Aerosol Composition for Days.

Using of such degreaser and consequences related to indoor aerosol are described in this study. Monoethanolamine, a part of a commercial degreaser being used in kitchens, was able to replace ammonium ...

Schwarz, Jaroslav; Makeš, Otakar; Ondráček, Jakub; Cusack, Michael; Talbot, Nicholas; Vodička, Petr; Kubelová, Lucie; Ždímal, Vladimír
Ústav chemických procesů, 2017

Optimalizace podmínek spalování čistírenských kalů.
Pohořelý, Michael; Moško, Jaroslav; Šyc, Michal; Svoboda, Karel; Zach, Boleslav; Punčochář, Miroslav
2017 - Czech
Ve zprávě byly zhodnoceny a popsány ideální provozní podmínky pro fluidní spalování suchých stabilizovaných čistírenských kalů. The optimum operating conditions for fluidized bed combustion of dry stabilized sewage sludge are evaluated and described in the report. Keywords: sewage sludge; fluidized bed; combustion Available at various institutes of the ASCR
Optimalizace podmínek spalování čistírenských kalů.

Ve zprávě byly zhodnoceny a popsány ideální provozní podmínky pro fluidní spalování suchých stabilizovaných čistírenských kalů....

Pohořelý, Michael; Moško, Jaroslav; Šyc, Michal; Svoboda, Karel; Zach, Boleslav; Punčochář, Miroslav
Ústav chemických procesů, 2017

Preparation of Partially Fluorinated Polyaromatics by Photocyclization of Stilbenes.
Jakubík, Pavel; Storch, Jan; Žádný, Jaroslav; Pfleger, Jiří; Církva, Vladimír
2017 - English
Synthetic strategies to partially fluorinated polyaromatics by photocyclization were examined, leading to both 1,2,3,4-tetrafluoro[6]helicene (1) and 1,2,3,4,13,14,15,16-octafluoro[6]helicene (2), and to 1,2,3,4-tetrafluoro[5]phenacene (3) and 1,2,3,4-tetrafluoro[6]phenacene (4). Thin films of the prepared compounds were characterized for their electrical properties and incorporated into OFET structures. Keywords: fluorinated; polyaromatics; photocyclization Available in digital repository of the ASCR
Preparation of Partially Fluorinated Polyaromatics by Photocyclization of Stilbenes.

Synthetic strategies to partially fluorinated polyaromatics by photocyclization were examined, leading to both 1,2,3,4-tetrafluoro[6]helicene (1) and 1,2,3,4,13,14,15,16-octafluoro[6]helicene (2), and ...

Jakubík, Pavel; Storch, Jan; Žádný, Jaroslav; Pfleger, Jiří; Církva, Vladimír
Ústav chemických procesů, 2017

Photochemical Synthesis of Aza-aromatic Compounds.
Kos, Martin; Žádný, Jaroslav; Storch, Jan; Sýkora, Jan; Církva, Vladimír
2017 - English
Herein we report synthesis of series of novel both aza- and diaza-helicenes, and phenacenes, which were prepared mainly by photocyclization of corresponding imine precursors. Reaction conditions of photocyclization (i.e. solvent, photocatalyst, type of irradiation, use of water scavenger) were optimized and enhanced. Usage of TEMPO as oxidizing agent leads to improvement of yields up to 72 %. Prepared 2-pyridyl substituted azaphenacenes will be utilized for preparation of potential semiconductive layers in cooperation with IMC of the CAS. Keywords: photocyclization; polyaromatics; azaphenacenes Available in a digital repository NRGL
Photochemical Synthesis of Aza-aromatic Compounds.

Herein we report synthesis of series of novel both aza- and diaza-helicenes, and phenacenes, which were prepared mainly by photocyclization of corresponding imine precursors. Reaction conditions of ...

Kos, Martin; Žádný, Jaroslav; Storch, Jan; Sýkora, Jan; Církva, Vladimír
Ústav chemických procesů, 2017

Porovnání chemického složení a zdrojů PM2.5 na venkovské pozaďové stanici.
Pokorná, Petra; Schwarz, Jaroslav; Krejčí, R.; Swietlicki, E.; Havránek, Vladimír; Ždímal, Vladimír
2017 - Czech
Cílem práce je porovnání chemického složení a zdrojů PM2.5 na venkovské pozaďové stanici, stanovených v letech 2009/2010, se situací v letech 1993/1994/1995. 24 hodinové vzorky PM2.5 byly analyzovány na prvkové složení (PIXE) a vzorky z let 2009/2010 také na iontové složení (IC). K získání chemických profilů zdrojů a jejich příspěvku k PM2.5 byl použit model Positive Matrix Factorization (PMF). Pokles koncentrací téměř všech prvků za sledované období je zřejmý. Mírný nárůst koncentrací K odpovídá nárůstu spotřeby biomasy k domácímu vytápění. Výsledkem modelu bylo pět faktorů pro období let 1993/94/95 a 6 faktorů pro období let 2009/2010. Pět faktorů pro období let 1993/94/95 bylo určeno jako spalování hnědého uhlí, spalování topného oleje/ropy/nafty, prach z dálkového transportu, resuspendovaný prach/půda a spalování černého uhlí. Pro období let 2009/2010 bylo určeny faktory sírany, dusičnany, domácí spalování, průmysl, resuspendovaný prach a smíšený faktor mořský aerosol a prach z dálkového transportu. Hlavní zdroje, industriální zdroje regionálního původu, spalující uhlí/olej/ropu/naftu v devadesátých letech byly nahrazeny lokálními topeništi spalujícími uhlí/biomasu.\n The objective of this study is to compare the PM2.5 chemical composition and sources at a rural background site in Central Europe between the years 1993/1994/1995 and 2009/2010. Chemical analysis of PM2.5 for 29/26 elements by PIXE and water-soluble inorganic ions by IC (2009/2010) was performed. The Positive Matrix Factorization (PMF) was applied to the chemical composition of PM2.5 to identify its sources. The results of chemical analysis and source apportionment have been compared. The decrease in time of almost all elements concentrations especially the metals regulated by the EU Directive are evident. The median ratios show significant improvement in levels of analysed elements in PM2.5. Slight increase of K levels points to rise in the residential wood combustion. The apportioned sources in the years 1993/94/95 were brown coal combustion, oil combustion, dust – long-range transport, re-suspended dust/soil and black coal combustion. The industrial combustion of brown/black coal and oil of the regional origin dominated. The six factors in the years 2009/2010 were assigned as sulphate, nitrate, residential heating, industry, re-suspended dust, sea salt + dust/soil – LRT. The secondary sulphate from coal combustion and residential biomass burning of the local origin dominated. Keywords: chemical composition; rural background site; metals Available in a digital repository NRGL
Porovnání chemického složení a zdrojů PM2.5 na venkovské pozaďové stanici.

Cílem práce je porovnání chemického složení a zdrojů PM2.5 na venkovské pozaďové stanici, stanovených v letech 2009/2010, se situací v letech 1993/1994/1995. 24 hodinové vzorky PM2.5 byly analyzovány ...

Pokorná, Petra; Schwarz, Jaroslav; Krejčí, R.; Swietlicki, E.; Havránek, Vladimír; Ždímal, Vladimír
Ústav chemických procesů, 2017

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