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Verification of the dynamic properties of a new model turbine wheel with free blades
Voronova, Evgeniya; Procházka, Pavel; Maturkanič, Dušan; Mekhalfia, Mohammed Lamine; Hodboď, Robert
2024 - anglický
The paper describes a new experimental model of turbine wheel with free blades. Verification tests were carried out using a Doppler laser vibrometer, with a focus on the equipment parameters under various conditions. The measurements were performed in the Laboratory of Rotational Laser Vibrometry originated at the Institute of Thermomechanics AS CR, v.v.i.
Klíčová slova:
natural frequencies; vibration; blade; laser; turbine
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Verification of the dynamic properties of a new model turbine wheel with free blades
The paper describes a new experimental model of turbine wheel with free blades. Verification tests were carried out using a Doppler laser vibrometer, with a focus on the equipment parameters under ...
Reaction Mechanisms of Psychoactive Compounds
Sokolová, Romana; Beneš, Marek; Jiroušková, Eliška; Degano, I.
2024 - anglický
The reaction mechanism of selected new psychoactive substances (NPS) 4-methylpentedrone and 2-(((4-ethyl-2,5-dimethoxyphenethyl)amino)methyl)phenol was investigated based on their\nelectrochemical and spectroelectrochemical properties. Both drugs were examined by means of cyclic voltammetry using diagnostic parameters for particular reaction schemes, UV/Vis, and IR\nspectroelectrochemistry. Since water participates in the redox mechanism of both studied compounds, the reaction mechanism was studied under a controlled amount of water in an\nacetonitrile environment.
Klíčová slova:
oxidation; reduction; IR spectrochemistry
Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd.
Reaction Mechanisms of Psychoactive Compounds
The reaction mechanism of selected new psychoactive substances (NPS) 4-methylpentedrone and 2-(((4-ethyl-2,5-dimethoxyphenethyl)amino)methyl)phenol was investigated based on their\nelectrochemical and ...
Spectroelectrochemical Devices for Monitoring of Intermediates and Products on Carbonbased Composite Electrodes
Vaněčková, Eva; Šikula, M.; Hrdlička, Vojtěch; Sebechlebská, Táňa; Kolivoška, Viliam
2024 - anglický
Spectroelectrochemistry (SEC), as an interdisciplinary field, provides us with more comprehensive information about electroactive molecules involved in charge transfer reactions. Commercially\navailable SEC cells most often have an incorporated platinum working electrode, which can limit the range of the usable potential window and, in addition, can complicate the analysis due to the\nabsorption phenomenon. In this work, we designed and manufactured two types of custom-made SEC cells employing optically transparent carbon-based working electrodes for UV-Vis monitoring of reactants and electrogenerated intermediates and products. The first SEC cell is entirely manufactured by 3D printing using fused deposition modeling (FDM) by combining optically transparent (PET) and electrically conductive (PLA-CB) filaments. The second SEC cell employs pencil graphite (PG) rods as the working electrode (PGE) and its body is manually assembled from quartz slides. The functionality of the FDM 3D printed SEC cell and manually assembled quartz SEC cell were verified by cyclic voltammetry with in situ UV-Vis spectroscopic absorption monitoring of ruthenium(III) acetylacetonate (Ru(ac)3) redox-active probe dissolved in an aqueous or non-aqueous deaerated solvent, respectively. Both presented cells enable complete redox reversible conversion and strictly oxygen-free conditions.
Klíčová slova:
pencil graphite electrode; spectroelectrochemistry; 3D printed electrode
Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd.
Spectroelectrochemical Devices for Monitoring of Intermediates and Products on Carbonbased Composite Electrodes
Spectroelectrochemistry (SEC), as an interdisciplinary field, provides us with more comprehensive information about electroactive molecules involved in charge transfer reactions. ...
Use of ceramic clay in work activity lessons at primary school level 1
2024 -
Klíčová slova:
pracovní činnosti; keramika; hlína; Člověk a svět práce; práce s drobným materiálem; základní škola
Plné texty jsou dostupné v knihovně ZČU.
Use of ceramic clay in work activity lessons at primary school level 1
Programming intelligent wiring at the first level of primary education
2024 -
Klíčová slova:
inteligentní elektroinstalace; Apple HomeKit; Loxone; Philips Hue; technika; algoritmizace; technická výchova; informatika; programování; první stupeň základní školy
Plné texty jsou dostupné v knihovně ZČU.
Programming intelligent wiring at the first level of primary education
Internet addiction in relation to depression among students
2024 -
Klíčová slova:
závislost na internetu; deprese; studenti
Plné texty jsou dostupné v knihovně ZČU.
Internet addiction in relation to depression among students
Creative sewing as teacher support in early childhood and pre-school educatio - enchanted windows
2024 -
Klíčová slova:
kostka; šátek; houba
Plné texty jsou dostupné v knihovně ZČU.
Creative sewing as teacher support in early childhood and pre-school educatio - enchanted windows
Topics for work activities connecting man and the world of work with digital technologies and their verification in practice with children in the 1st grade of elementary school
2024 -
Klíčová slova:
Člověk a svět práce; digitální technologie; pracovní činnosti
Plné texty jsou dostupné v knihovně ZČU.
Topics for work activities connecting man and the world of work with digital technologies and their verification in practice with children in the 1st grade of elementary school
Nauczajmy, a little about the project from students for students
2024 -
Klíčová slova:
projekt "UČ!"; formativní hodnocení; aktivační metody; výukové hry; pozitivní disciplína
Plné texty jsou dostupné v knihovně ZČU.
Nauczajmy, a little about the project from students for students
Production of climbing holds and their testing
2024 -
Klíčová slova:
lezectví; lezecké chyty; výroba lezeckých chytů; výrobci lezeckých chytů v ČR; polyesterová pryskyřice; polyuretanová pryskyřice; beton; sádra
Plné texty jsou dostupné v knihovně ZČU.
Production of climbing holds and their testing
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