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Electrochemical Valorization of Lignocellulosic Biomass Amination of Furfural and 5-Hydroxymethylfurfural
Donkeng Dazie, Joel; Koláčná, Lucie; Urban, Jiří; Lamač, Martin; Ludvík, Jiří
2024 - anglický
Furfural (FF) and 5-hydroxymethylfurfural (HMF) isolated from waste lignocellulosic biomass represent renewable sources. The present contribution deals with the transformation of FF and HMF into furfuryl amines which are important precursors namely for pharmaceutical synthesis. First, FF and HMF underwent condensation reactions with various amines which were electrochemically monitored to optimize the process. The resulting Schiff bases were identified by NMR and subsequently electrochemically reduced in basic media. The vicinal diamine (aminopinacol) was the main product besides the expected furfuryl amines. This reaction is a contribution to green synthesis because it was performed electrochemically, in water, and without any metallic catalysts.
Klíčová slova:
furfural; 5-hydroxymethylfurfural; (di)amines
Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd.
Electrochemical Valorization of Lignocellulosic Biomass Amination of Furfural and 5-Hydroxymethylfurfural
Furfural (FF) and 5-hydroxymethylfurfural (HMF) isolated from waste lignocellulosic biomass represent renewable sources. The present contribution deals with the transformation of FF and HMF into ...
Electrochemical Properties of Newly Synthesized Selaginpulvilins
Dostálová, L.; Sokolová, Romana; Schwarzová-Pecková, K.; Rýček, L.
2024 - anglický
The electrochemical properties of newly synthesized selaginpulvilin were investigated by cyclic voltammetry and UV-Vis spectroelectrochemistry. The subject of the study were two\nselaginpulvilins differing in the presence of a hydroxyl group in the media of 0.1 mol L-1 tetrabutylammonium hexafluorophosphate as supporting electrolyte in anhydrous acetonitrile. Both\ncompounds provided an oxidative signal in the positive region until +2.0 V.
Klíčová slova:
oxidation; cyclic voltammetry; selaginpulvilins
Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd.
Electrochemical Properties of Newly Synthesized Selaginpulvilins
The electrochemical properties of newly synthesized selaginpulvilin were investigated by cyclic voltammetry and UV-Vis spectroelectrochemistry. The subject of the study were two\nselaginpulvilins ...
3D-printed Electrodes with Nearly Ideal Charge Transfer Characteristics
Vaněčková, Eva; Sebechlebská, Táňa; Kolivoška, Viliam
2024 - anglický
3D printing is an outstanding manufacturing tool for prototyping customized designs at reduced time and costs, having found applications in fields such as medicine or the automotive industry. The development of printable electrically conductive composite materials brought a revolution to electrochemistry, with 3D-printed electrodes being intensively studied from the viewpoint of\nanalytical performance and stability. However, it is often reported that 3D-printed electrodes have poor charge transfer characteristics, typically due to limited exposure of the electrically conductive phase at the composite surface to the surrounding solution. In this work, we devise and apply simple electrochemical activation procedures that lead to a significant improvement of charge transfer characteristics of 3D printed electrodes.
Klíčová slova:
three-dimensional printing; electrochemistry; electrodes
Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd.
3D-printed Electrodes with Nearly Ideal Charge Transfer Characteristics
3D printing is an outstanding manufacturing tool for prototyping customized designs at reduced time and costs, having found applications in fields such as medicine or the automotive industry. The ...
Algorithmic thinking and its development in primary school
2024 -
Klíčová slova:
Rámcový vzdělávací program; RVP; revize Informatiky; rozvoj algoritmického myšlení; ŠVP ZV
Plné texty jsou dostupné v knihovně ZČU.
Algorithmic thinking and its development in primary school
Modular tool for teaching physics and technical education
2024 -
Klíčová slova:
technická výchova; fyzika; modulární; pomůcka; 3D tisk; mechanika; síla; vztlaková síla; Flettnerův rotor; měření; pohyb
Plné texty jsou dostupné v knihovně ZČU.
Modular tool for teaching physics and technical education
Plinko
2024 -
Klíčová slova:
Plinko; mezioborovost; demonstrační pomůcka; technika
Plné texty jsou dostupné v knihovně ZČU.
Plinko
Set of games
2024 -
Klíčová slova:
vlastnosti dřeva; hry; zpracování dřeva; aktivita; nízký rozpočet
Plné texty jsou dostupné v knihovně ZČU.
Set of games
A web application to support the teaching of algorithmization
2024 -
Klíčová slova:
programování; algoritmizace; informatické myšlení; gamifikace; hra se vzdělávacím obsahem
Plné texty jsou dostupné v knihovně ZČU.
A web application to support the teaching of algorithmization
Didactic model of DC electric motor
2024 -
Klíčová slova:
demonstrační model; didaktická pomůcka; stejnosměrný motor
Plné texty jsou dostupné v knihovně ZČU.
Didactic model of DC electric motor
Reclaiming childhood joy: an adventure in the world of escape room
2024 -
Klíčová slova:
úniková místnost; znovu získat dětskou radost
Plné texty jsou dostupné v knihovně ZČU.
Reclaiming childhood joy: an adventure in the world of escape room
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