A5103153014- Thermochemical Biomass Conversion Processes
- Magnetic and Electromagnetic Effects
- Thermal and Kinetic Analysis
- Fiber-reinforced polymer composites
- Recycling and Waste Management Techniques
- Clay minerals and soil interactions
- Coal and Coke Industries Research
- Coal Combustion and Slurry Processing
- Coal and Its By-products
- Zeolite Catalysis and Synthesis
- Electric Motor Design and Analysis
- Education, Psychology, and Social Research
- Coal Properties and Utilization
- Lignin and Wood Chemistry
- Magnetic Field Sensors Techniques
- Analytical Chemistry and Chromatography
- Hybrid Renewable Energy Systems
- Catalysts for Methane Reforming
- Energetic Materials and Combustion
- Advanced Chemical Sensor Technologies
- Adsorption, diffusion, and thermodynamic properties of materials
- Adsorption and biosorption for pollutant removal
- Recycling and utilization of industrial and municipal waste in materials production
- Microplastics and Plastic Pollution
- Magnetic Properties of Alloys
Czech Academy of Sciences, Institute of Rock Structure and Mechanics
2014-2024
Czech Academy of Sciences
2003-2023
University of Chemistry and Technology, Prague
2021
Czech Academy of Sciences, Institute of Geology
1987
The stabilization of radioactive metal ions in inorganic polymer matrices aluminum silicates, also called geopolymers, is demonstrated. strength the metal–ion bonds was then tested by leaching water and sulfuric‐acid solutions. experiments were carried out radioactive‐tracer method with 152 Eu, 134 Cs, 60 Co, 59 Fe isotopes.
Coalification temperatures are often considered to be approximately 100–170 °C for bituminous coal and 170–275 anthracite. However, our micropetrographic observations, solid state 27Al magic-angle spinning nuclear magnetic resonance measurements, interpretation of δ13C values whewellite in pelosiderite concretions from Carboniferous sediments, assessment thermal stability show that coalification can significantly lower. Also the alteration may substantially lower than is stated. Ordinarily,...
We have investigated methods of assembling large magnetic blocks from NdFeB magnets with a high value the maximum energy product, and inserting these into circuits. found that induction in middle an air gap between opposing closed circuit depends, addition to other parameters, on basic method blocks. compared two assembly, differing direction which plates approach each other. When being moved toward during assembly by Method 1, first repel In case low coercivity magnet material, this results...
The article presents the results and findings obtained through assembly of opposing linear Halbach arrays from two magnet layers using large magnetic blocks permanent NdFeB magnets, especially concerning distribution induction in an air gap.The use these has led to a significant expansion area field with substantially higher value comparison similar composed small magnets.The paper also discusses determined dependences on parameters x, y, z coordinate system indicates possibilities achieving...
For geochemical purposes, complex aluminum compounds in coal organic matter different types of were identified by solid state nuclear magnetic resonance measurements 27Al. Low ash samples anthracites, bituminous coals and altered from the Czech Republic, Russia, Ukraine, China Australia tested; further, low lignite xylite Republic gagatite Poland analyzed. In acquired 27Al MAS NMR spectra, two significant peaks at chemical shifts recorded, 3.5 - 4 13.5 15 ppm. It was found that peak shift...
Gas chromatographic measurements of the retention times alkyl naphthalenes on packed columns with polar and non-polar stationary phases have proven that logarithm relative time increases bi-linearly (not linearly) number carbon atoms in a molecule. This is caused by strong inclination side chains toward intramolecular cyclization. A FTIR spectral analysis has shown longer are cyclized through an interaction between terminal CH3 group aromatic ring. Conventional aromatic-aliphatic molecules...