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Modular Synthesis of Dendritic Amphiphiles.
Edr, Antonín
2021 - English
The synthesis of such structures starts by an attachment of alkyl chain/s R and dendritic wedge/s to the starting molecules. These dendritic wedges are ended by three allyl groups so that various polar groups can be conjugated to the periphery of the wedge by so called thiol-ene click reaction. In addition to the resulting symmetrical structures, a synthesis of their unsymmetrical analogues bearing fluorescent tag on one of its arms (Figure 1) will be presented.
Keywords:
modular synthesis; sythesis; drug carriers
Available in a digital repository NRGL
Modular Synthesis of Dendritic Amphiphiles.
The synthesis of such structures starts by an attachment of alkyl chain/s R and dendritic wedge/s to the starting molecules. These dendritic wedges are ended by three allyl groups so that various ...
Ambient Organic Aerosol Origin at Rural Background Site in the Czech Republic.
Lhotka, Radek
2021 - English
Atmospheric aerosol (AA) are ubiquitous particles in the atmosphere that influence Earth’s climatic system, environmental interactions,\nand human health. AA is emitted directly from primary sources or formed in the atmosphere via the oxidation of gas-phase precursors\nwith subsequent partitioning resulting in low-volatility products into the particle phase. Among AA, great interest is dedicated to organic\naerosol (OA) since it can represent from 20 to 90% of the total submicron mass.
Keywords:
atmospheric aerosol; rural background site; measurement campaigns
Available in a digital repository NRGL
Ambient Organic Aerosol Origin at Rural Background Site in the Czech Republic.
Atmospheric aerosol (AA) are ubiquitous particles in the atmosphere that influence Earth’s climatic system, environmental interactions,\nand human health. AA is emitted directly from primary sources ...
Material Flow Analysis of Textile Waste: A Case Study of the Czech Republic
Shtukaturova, Anastasia
2021 - English
The main aim of this study is to analyze the flows of these streams in the Czech Republic. To achieve this goal, we have cooperated with different institutions that are working with textiles and textile waste in order to create a material flow analysis (MFA) and collect any available data.
Keywords:
municipal solid waste; material flow analysis; recycling systems
Available in a digital repository NRGL
Material Flow Analysis of Textile Waste: A Case Study of the Czech Republic
The main aim of this study is to analyze the flows of these streams in the Czech Republic. To achieve this goal, we have cooperated with different institutions that are working with textiles and ...
Metodika experimentů pro studium chování perfluoroalkylových látek při pyrolýze čistírenských kalů
Hušek, Matěj; Skoblia, S.; Moško, Jaroslav; Beňo, Z.; Semerád, Jaroslav; Cajthaml, Tomáš; Pohořelý, Michael
2021 - Czech
Zpracování stabilizovaných čistírenských kalů pomocí pyrolýzy představuje jednu z možností, jak s tímto materiálem nakládat. Pyrolýzní jednotky jsou vhodné pro zpracování čistírenských kalů s nízkým obsahem těžkých kovů, jejich vhodnost pro zpracování kalů obsahující různé organické polutanty je ve výzkumu. V této práci diskutujeme problematiku per- a polyfluoroalkylových látky (PFASs) (organická znečisťující látka) v čistírenských kalech a přípravu metodiky pro experimentální stanovení chování PFASs při pyrolýze čistírenských kalů, za účelem stanovení praktických podmínek pyrolýzy pro zpracování čistírenských kalů obsahující PFASs. One of the waste management options of stabilised sewage sludge is its treatment by pyrolysis. Pyrolysis units are suitable for sewage sludge treatment with low-heavy metal content, but their suitability for various organic pollutants removal contained in sludge is under investigation. In this paper, we discuss the issue of per- and polyfluoroalkyl substances (PFASs) (organic pollutants) in sewage sludge and the development of a methodology for the experimental determination of PFASs behaviour during sewage sludge pyrolysis in order to determine practical pyrolysis conditions for the treatment of sewage sludge containing PFASs.\n\n
Keywords:
sewage sludge; PFASs; pyrolysis; sludge char
Available in a digital repository NRGL
Metodika experimentů pro studium chování perfluoroalkylových látek při pyrolýze čistírenských kalů
Zpracování stabilizovaných čistírenských kalů pomocí pyrolýzy představuje jednu z možností, jak s tímto materiálem nakládat. Pyrolýzní jednotky jsou vhodné pro zpracování čistírenských kalů s nízkým ...
Three Dimensional CFD Model of a Single Rising Bubble in Stagnant Liquids.
Crha, Jakub
2021 - English
Two-phase (gas-liquid) flows are fundamental to wide range of chemical industrial processes such as absorption or distillation. Gaseous\nphase is mostly represented by rising bubble swarms through the liquid bulk. Physicochemical properties of the liquid and gaseous phases\ntogether with the bubble diameter and shape largely affect the bubble rise velocity, which defines the residence time of the bubble in the liquidbulk.1. Bubble behaviour can be studied experimentally, theoretically or most recently - using CFD solvers. These solvers are designed\nto numerically solve Navier-Stokes equations.
Keywords:
CFD model; bubble's interface; testing
Available in a digital repository NRGL
Three Dimensional CFD Model of a Single Rising Bubble in Stagnant Liquids.
Two-phase (gas-liquid) flows are fundamental to wide range of chemical industrial processes such as absorption or distillation. Gaseous\nphase is mostly represented by rising bubble swarms through the ...
Application of Hydrodynamic Cavitation in Brewing.
Štěrba, Jiří
2021 - English
We have applied such advantages in the brewery industry. Venturi jet system is chosen as the HC technique due to energy saving and\nrobust design. In the field of beer brewing, we would like to investigate several phenomena, such as the isomerization of bitter hop acids,\nthe reduction of gluten concentration or the cell walls breakdown. All these experiments will be performed on the already constructed experimental brewery system.
Keywords:
Hydrodynamic cavitation; bubbles; brewery industry
Available in a digital repository NRGL
Application of Hydrodynamic Cavitation in Brewing.
We have applied such advantages in the brewery industry. Venturi jet system is chosen as the HC technique due to energy saving and\nrobust design. In the field of beer brewing, we would like to ...
Deoxyfluorinated N-acetyllactosamines as Tailored Carbohydrate-based Probes for Human Galectins.
Kurfiřt, Martin
2021 - English
this work, I prepared a complete series of mono‑deoxyfluorinated N-acetyllactosamine analogues 1-6. The synthesis of each analogue\nrequired approximately 15 synthetic steps, including deoxyfluorination of monosaccharide precursors, chemical glycosylation and\ndeprotection. Their binding affinities to the two most explored human galectin-1 and -3 were determined by ELISA and 19F NMR T2-filter\ntechniques, which enabled the identification of hydroxyl groups, crucial in the non-covalent recognition by galectins. This binding study\nalso permitted to compare both tested galectins in terms of their substrate specificity, revealing subtle differences, which could be utilized\nin the development of selective galectin inhibitors. Furthermore, the series is also a perfect tool to study the molecular origin of recognition\nevents via epitope-mapping 19F NMR techniques.
Keywords:
NMR techniques; deoxyfluorinated N-acetyllactosamines; human alectins
Available in a digital repository NRGL
Deoxyfluorinated N-acetyllactosamines as Tailored Carbohydrate-based Probes for Human Galectins.
this work, I prepared a complete series of mono‑deoxyfluorinated N-acetyllactosamine analogues 1-6. The synthesis of each analogue\nrequired approximately 15 synthetic steps, including ...
Efficiency of Mercury Vapour Removal from Model Gases by Means of Sulfur Impregnated Sorbents.
Ružovič, Tomáš
2021 - English
This work briefly describes the sorption apparatus measuring the efficiency of removal of the gaseous form of elemental mercury (GEM)\nunder model conditions.
Keywords:
impregnated sorbents; vapor removat; mercury
Available in a digital repository NRGL
Efficiency of Mercury Vapour Removal from Model Gases by Means of Sulfur Impregnated Sorbents.
This work briefly describes the sorption apparatus measuring the efficiency of removal of the gaseous form of elemental mercury (GEM)\nunder model conditions.
Catalytic Wet Air Oxidation of Antibiotics over Supported Platinum on Different Supports Fractions Based CeO2 and ZrO2.
Bourassi, Mahdi
2021 - English
We have investigated catalytic oxidation of model antibiotics solutions, mainly based on Tetracycline and Sulfamethoxazole for their different composition and presence in the environment.
Keywords:
membrane separation; catalytic wet air oxidation; antibiotics
Available in a digital repository NRGL
Catalytic Wet Air Oxidation of Antibiotics over Supported Platinum on Different Supports Fractions Based CeO2 and ZrO2.
We have investigated catalytic oxidation of model antibiotics solutions, mainly based on Tetracycline and Sulfamethoxazole for their different composition and presence in the environment.
Mikroplasty a jejich odstranění z vod pomocí sorbentů.
Spáčilová, Markéta; Dytrych, Pavel; Koštejn, Martin; Fajgar, Radek; Šolcová, Olga
2021 - Czech
Zvýšený výskyt cizorodých látek ve vodních zdrojích, ať už mikroplastů či dalších jiných organických kontaminantů je v současné době stále se zvyšující environmentální problém. Tato problematika úzce souvisí se zmapováním jejich výskytu ve vodním prostředí, a dále také s možnými způsoby jejich odstranění. V rámci práce byla nejprve provedena charakterizace připravených mikroplastových částic pěti nejčastěji používaných plastů (polyethylen, polyamid, polytetrafluorethylen, polyethylenglykoltereftalát a polystyren) pomocí skenovací elektronové mikroskopie (SEM), Ramanovy spektroskopie a infračervené spektroskopie (IČ). Tyto mikroplastové částice byly použity pro přípravu simulovaných vod kontaminovaných mikroplasty. Na těchto vzorcích vod byla vyvinuta metodika určení počtu obsažených částeček mikroplastů. Dále byl testován způsob jejich odstranění ze vzorků se simulovanou kontaminací pomocí funkčních sorbentů. Byly použity především sorbenty na bázi přírodních bentonitů a zeolitů. Bylo potvrzeno, že účinnost těchto materiálů závisí nejen na jejich složení a texturních vlastnostech, avšak dá se zvýšit pomocí jejich modifikace.\n\n The increased occurrence of contaminants in water sources, whether microplastics or other organic contaminants, is currently an ever-increasing environmental problem. This issue is closely related to the mapping of their occurrence in the aquatic environment, as well as to possible ways to eliminate them. The work first characterized the characterization of prepared microplastic particles of the five most commonly used plastics (polyethylene, polyamide, polytetrafluoroethylene, polyethylene glycol terephthalate and polystyrene) using scanning electron microscopy (SEM), Raman spectroscopy and infrared spectroscopy (IR). These microplastic particles were used to prepare simulated microplastic contaminated waters. A methodology for determining the number of microplast particles contained was developed on these water samples. Furthermore, the method of their removal from samples with simulated contamination using functional sorbents was tested. Sorbents based on natural bentonites and zeolites were mainly used. It has been confirmed that the effectiveness of these materials depends not only on their composition and textural properties, but can also be increased by modifying them.\n
Keywords:
bentonite; functional sorbents; microplastics
Available in a digital repository NRGL
Mikroplasty a jejich odstranění z vod pomocí sorbentů.
Zvýšený výskyt cizorodých látek ve vodních zdrojích, ať už mikroplastů či dalších jiných organických kontaminantů je v současné době stále se zvyšující environmentální problém. Tato problematika úzce ...
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