No (560)
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Fluidized Bed Gasification of Coal-Oil and Coal-Water-Oil Slurries by a Gas Containing Carbon Dioxide-Oxygen Mixture
Svoboda, Karel; Pohořelý, Michael; Jeremiáš, Michal; Kameníková, Petra; Skoblia, S.; Šyc, Michal
2010 - English
Direct use of CO2 instead of steam or as a partial substitute for steam in coal and biomass direct gasification processes is one of possibilities of potential useful application of CO2. Based on the above stated facts we concentrated in our study on FB gasification of COS and COWS slurries with gases containing higher concentrations of CO2. Our attention was particularly devoted to effects of CO2 concentrations and gasification temperature on producer gas heating value, energy yield, tar and BTX yields in comparison with FB gasification with steam-O2 mixtures.
Keywords:
coal-oil slurries; recirculation; gas
Available at various institutes of the ASCR
Fluidized Bed Gasification of Coal-Oil and Coal-Water-Oil Slurries by a Gas Containing Carbon Dioxide-Oxygen Mixture
Direct use of CO2 instead of steam or as a partial substitute for steam in coal and biomass direct gasification processes is one of possibilities of potential useful application of CO2. Based on the ...
Ability of Plants to Clean Soils Contaminated by Heavy Metals
Tlustoš, P.; Punčochář, Miroslav; Szaková, J.; Balík, J.; Habart, J.; Šyc, Michal; Pohořelý, Michael
2010 - English
The objective of our paper is to show ability of different plants and different growing strategies to extract metals from contaminated soils including soil properties suitable for acceptable soil phytoextraction.
Keywords:
heavy metals; phytostabilization
Available at various institutes of the ASCR
Ability of Plants to Clean Soils Contaminated by Heavy Metals
The objective of our paper is to show ability of different plants and different growing strategies to extract metals from contaminated soils including soil properties suitable for acceptable soil ...
Modification of Catalytic Properties of Mesoporous Silica-Alumina by Acid Extraction
Vít, Zdeněk; Gulková, Daniela; Kaluža, Luděk; Zdražil, Miroslav; Bakardjieva, Snejana
2010 - English
Keywords:
mesoporous silica-alumina; hydrodesulfurization; acid extraction
Available at various institutes of the ASCR
Modification of Catalytic Properties of Mesoporous Silica-Alumina by Acid Extraction
LC-NMR in Use
Sýkora, Jan
2010 - English
Keywords:
nmr development; experimental technique; lc-nmr
Available at various institutes of the ASCR
LC-NMR in Use
Optical Absorption Sensors for Evaluation of Yeast Acidification Power
Rychtáriková, Renata; Frančič, N.; Hetflejš, Jiří; Kuncová, Gabriela; Gabriel, P.; Lobnik, A.
2010 - English
The acidification power test provides a fast and simple method of assessing the ability of cells to perform a successful fermentation. It has been used as a rejection criterion for assessing the technological quality of starter yeast cultures in brewing, cider production, baking, as well as cheese making based on lactic acid bacteria. The cell acidification power responses to pH decrease of the environment after glucose addition. We have prepared novel recognition elements of pH sensors suitable for evaluation of yeast acidification power by absorption of two pH sensitive sulfonphthalein dyes (bromocresol green and bromophenol blue) into hydrogel of poly(2-hydroxyethyl methacrylate-co-ethylene dimethacrylate). The absorption spectra, function ranges, pKa values, and response times for each absorbed dye were evaluated, compared with the free dyes, and further discussed with regard to its application to the acidification power test.
Keywords:
yeast acidification power; optical sensor; hydrogel
Available at various institutes of the ASCR
Optical Absorption Sensors for Evaluation of Yeast Acidification Power
The acidification power test provides a fast and simple method of assessing the ability of cells to perform a successful fermentation. It has been used as a rejection criterion for assessing the ...
pH Responsive Sol-Gel Hybrid Materials Doped With Colorimetric Sulfonphtalein pH Indicators
Frančič, N.; Rychtáriková, Renata; Kuncová, Gabriela; Lobnik, A.
2010 - English
In this work, we have studied the effects of epoxy-modifications on functional properties organic-inorganic materials prepared by copolymerization of 3-glycidoxypropyl trimethoxysilane (GPTMS) a tetramethoxysilane (TMOS) with entrapped pH colorimetric indicators. Results show that the dyes are completely physically entrapped with no leaching. Sensor membranes have dynamic ranges from pH 3 - 7 (bromocresol green), pH 5 - 8 (bromocresol purple), pH 6 - 10 (bromothymol blue), and pH 2 - 5 (bromofenol blue), respectively. Thin films show excellent reproducibility, reversibility and have short response times of 200 s. We have also determined that the lower molar ratio of TMOS gave us better responses to pH changes, while the higher TMOS ratio gave us more uniform layers. The best overall results were obtained by molar ratio 5.67:1 of GPTMS and TMOS.
Keywords:
inorganic materials; sol-gel hybrid materials
Available at various institutes of the ASCR
pH Responsive Sol-Gel Hybrid Materials Doped With Colorimetric Sulfonphtalein pH Indicators
In this work, we have studied the effects of epoxy-modifications on functional properties organic-inorganic materials prepared by copolymerization of 3-glycidoxypropyl trimethoxysilane (GPTMS) a ...
Photoinduced Charge Separation Properties of Various Types of Titania Thin Films
Klusoň, Petr; Kment, Štěpán; Morozová, Magdalena; Zlámal, M.; Krýsa, J.
2010 - English
Keywords:
titanium; photodegradation; oxidation reactions
Available at various institutes of the ASCR
Photoinduced Charge Separation Properties of Various Types of Titania Thin Films
Optical Fiber Element of Sensors with Biolumiscent Cells
Vrbová, Hana; Kuncová, Gabriela; Pospíšilová, Marie
2010 - English
In this work, we compared theoretical calculations [2] of coupling efficiency with experiments for various OFEs with the immobilized whole-cell bacterial bioreporter of Pseudomonas fluorescens HK44 (producing bioluminescence in presence of naphthalene and salicylate). We evaluated the influence of the physical properties and geometry of the OFE, active layer and cell immobilization techniques on intensity of detected light.
Keywords:
bioluminiscence; optical fiber element; pseudomonas fluorescens HK44
Available at various institutes of the ASCR
Optical Fiber Element of Sensors with Biolumiscent Cells
In this work, we compared theoretical calculations [2] of coupling efficiency with experiments for various OFEs with the immobilized whole-cell bacterial bioreporter of Pseudomonas fluorescens HK44 ...
Problems of Molecular Simulations of Fluid Mixtures: Intermolecular Potential Models and Combining Rules
Nezbeda, Ivo
2010 - English
Keywords:
molecular simulations; fluid mixtures; polarizability
Available at various institutes of the ASCR
Problems of Molecular Simulations of Fluid Mixtures: Intermolecular Potential Models and Combining Rules
A Desktop Installation for Electrodiffusion Experiments
Wein, Ondřej; Tovčigrečko, Valentin; Slezák, Jiří; Sobolík, Václav
2010 - English
Keywords:
electrodiffusion transient process; calibration operations
Available at various institutes of the ASCR
A Desktop Installation for Electrodiffusion Experiments
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