No (28542)
Yes (5858)
Number of found documents:
34400
Published from
to
Bubble Breakup in Triton Solutions
Semlerová, Tereza
2024 - English
This work deals with investigation of the bubble breakup in surfactant Triton X-45 solutions and the results are compared with data measured in water and α-terpineol solutions as another type of surfactants.
Keywords:
bubble breakup; surfactants; dynamic surface tension
Available in digital repository of the ASCR
Bubble Breakup in Triton Solutions
This work deals with investigation of the bubble breakup in surfactant Triton X-45 solutions and the results are compared with data measured in water and α-terpineol solutions as another type of ...
Thin Film Photocatalysts on the Basis of g-C3N4
Schimon, Domonik
2024 - English
This study revolves around the synthesis of powder g-C3N4, fabricationof thin g-C3N4 films and their efficacy in degrading pollutants, assessed through experimentation in a batch photoreactor (BPR) and a slit geometry photomicroreactor (PMR)2. The photocatalytic activity of g-C3N4 was tested with 4 different model substances: fluorescent dye, rhodamine B, was used as a reference substance and three separate antibiotics, which are emerging wastewater pollutants, namely tetracycline, trimethoprim, sulfamethoxazole.
Keywords:
g-C3N4; photocatalysis; microreactor
Available in a digital repository NRGL
Thin Film Photocatalysts on the Basis of g-C3N4
This study revolves around the synthesis of powder g-C3N4, fabricationof thin g-C3N4 films and their efficacy in degrading pollutants, assessed through experimentation in a batch photoreactor (BPR) ...
Measurements of New Particle Formation in the Atmosphere
Špalová, Anna
2024 - English
In this work, the formation of particles and their transformation to larger sizes will be studied by measuring the concentration of molecular clusters. The measurement will take place at a rural background site National Atmospheric Observatory Košetice. At the ground level, a Neutral and Air Ion Spectrometer (NAIS) able to measure both neutral and charged clusters or particles ranging from 0.8 to 40 nm in diameter will be used together with a Particle Size Magnifier (PSM) able to measure neutral clusters as small as 1 nm in diameter up to 12 nm. Larger particles will be measured by a Scanning Mobility Particle Sizer (SMPS). At a height of 230 m above ground level, there will be another SMPS and also a nanoSMPS able to detect particles as small as 1 nm in diameter.
Available in digital repository of the ASCR
Measurements of New Particle Formation in the Atmosphere
In this work, the formation of particles and their transformation to larger sizes will be studied by measuring the concentration of molecular clusters. The measurement will take place at a rural ...
Electrochemistry of Acetaminophen
Mikysek, T.; Ludvík, Jiří
2024 - English
The contribution is focused on electrochemical oxidation of acetaminophen mainly in non-aqueous media. The influence of various organic solvents as well as the pH effect is described herein. The redox properties of acetaminophen were studied by means of cyclic voltammetry, and rotating-disk voltammetry. We found that the protonation/deprotonation of acetaminophen acts as a ratedetermining step, where the stability of phenoxy radical intermediate plays an important role.
Keywords:
acetaminophen; phenacetine; voltammetry
Available on request at various institutes of the ASCR
Electrochemistry of Acetaminophen
The contribution is focused on electrochemical oxidation of acetaminophen mainly in non-aqueous media. The influence of various organic solvents as well as the pH effect is described herein. The redox ...
A New Approach to Determining the Drug Guaifenesin Using Voltammetric and Flow Injection Analysis
Kelíšková, P.; Matvieiev, O.; Sokolová, Romana; Janíková, L.; Behúl, M.; Šelešovská, R.
2024 - English
This study presents a new method for detecting guaifenesin (GFE) in pharmaceutical samples. We employed screen-printed sensors with a boron-doped diamond electrode (BDDE) to develop and validate both voltammetric and flow amperometric methods. These approaches were effectively used to analyze model solutions, pharmaceutical preparations, and serum samples spiked with GFE, producing accurate results comparable to those obtained with HPLC/DAD analysis. The developed methods provide straightforward, sensitive, and selective means for determining GFE in various sample matrices, underscoring the potential of SP/BDDE in electrochemical analysis.
Keywords:
guaifenesin; screen-printed sensor; boron-doped diamond electrode
Available on request at various institutes of the ASCR
A New Approach to Determining the Drug Guaifenesin Using Voltammetric and Flow Injection Analysis
This study presents a new method for detecting guaifenesin (GFE) in pharmaceutical samples. We employed screen-printed sensors with a boron-doped diamond electrode (BDDE) to develop and validate both ...
Optimization of Parameters Used in the Application of Elimination Voltammetry with Linear Scan
Navrátil, Tomáš; Trnková, L.; Hrdlička, Vojtěch; Li, X.
2024 - English
Elimination Voltammetry with Linear Scan (EVLS) is a well-established mathematical method that aids in understanding an analyzed electrochemical system. In almost 30 years since its derivation, it has become a “black-box” technique that is applied automatically (in most cases due to its incorporation into a voltammetric software) without thinking about its fundamentals. However, the choice of optimum parameters under which DC voltammetric data (from which elimination curves are calculated) is crucial. This contribution deals with revealing the optimum ratio of applied scan rates and their absolute values (i.e., times of recording) in dependence on the character of the investigated system (diffusion-controlled process, adsorption-controlled process, etc.).
Keywords:
elimination voltammetry with linear scan; optimization; adsorption
Available on request at various institutes of the ASCR
Optimization of Parameters Used in the Application of Elimination Voltammetry with Linear Scan
Elimination Voltammetry with Linear Scan (EVLS) is a well-established mathematical method that aids in understanding an analyzed electrochemical system. In almost 30 years since its derivation, it has ...
ENHANCING WELD JOINT INTEGRITY IN S460 HIGH-STRENGTH STEEL PLATES: AN EXPERIMENTAL APPROACH
Al Khazali, Mohammad Sami; Malíková, Lucie; Křivý, V.; Seitl, Stanislav
2024 - English
Exploring S460 steel, this research assesses weld toe microstructure and fatigue. It finds that welding affects \nhardness of welded area and fatigue life. These insights are crucial for structural engineering, optimizing welding \npractices for longevity. \nTests confirm increased weld toe hardness correlates with fatigue resistance. This informs design strategies, \nensuring bridge safety under cyclic loads. The study advances understanding of HSS behaviour, influencing future \nwelding techniques.
Keywords:
High-strength steel; weld's toe; cruciform joints; S460; fatigue behaviour
Available at various institutes of the ASCR
ENHANCING WELD JOINT INTEGRITY IN S460 HIGH-STRENGTH STEEL PLATES: AN EXPERIMENTAL APPROACH
Exploring S460 steel, this research assesses weld toe microstructure and fatigue. It finds that welding affects \nhardness of welded area and fatigue life. These insights are crucial for structural ...
Experimentální výzkum mechanických a lomově-mechanických vlastností ocelí P355, L360NB a 42CrMo4 exponovaných ½ roku v tlakové vodíkové atmosféře
Šperl, Martin; Gajdoš, Lubomír; Šorm, Filip; Bejdl, Jan
2024 - Czech
Výzkum vlivu vodíku na mechanické a lomově mechanické vlastnosti daných ocelí v závislosti na čase expozice. Research of the influence of hydrogen on the mechanical and fracture mechanical properties of specific steels depending on the exposition time.
Keywords:
pipeline steel; hydrogen exposition; fracture toughness; notch toughness
Available at various institutes of the ASCR
Experimentální výzkum mechanických a lomově-mechanických vlastností ocelí P355, L360NB a 42CrMo4 exponovaných ½ roku v tlakové vodíkové atmosféře
Výzkum vlivu vodíku na mechanické a lomově mechanické vlastnosti daných ocelí v závislosti na čase expozice....
Posouzení příčin poruch plynovodů po přimíchání vodíku do zemního plynu
Kec, J.; Šperl, Martin
2024 - Czech
Tento dokument sumarizuje pravděpodobnosti výskytu poruch v plynovodu v důsledku přimíchávání vodíku do zemního plynu. This document summarizes the probabilities of pipeline failures due to hydrogen blending into natural gas.
Keywords:
pipeline; hydrogen blending; defects; reliability
Available at various institutes of the ASCR
Posouzení příčin poruch plynovodů po přimíchání vodíku do zemního plynu
Tento dokument sumarizuje pravděpodobnosti výskytu poruch v plynovodu v důsledku přimíchávání vodíku do zemního plynu....
Correlative probe electron microscopy analysis of plasma-treated gallium-doped zinc oxide nanorods
Rutherford, D.; Remeš, Zdeněk; Mičová, J.; Ukraintsev, E.; Rezek, B.
2024 - English
Correlative Probe Electron Microscopy (CPEM) was used to investigate the topographical and electronic emission properties of gallium-doped zinc oxide nanorods (ZnO:Ga) after low pressure hydrogen or oxygen plasma treatment. Simultaneous secondary electron (SE) and back-scattered electron (BSE) emission information from the same nanorods enabled true correlation with the topographical information obtained by atomic force microscopy (AFM). All nanorods were analyzed in-situ on the same substrate using the same experimental parameters which allowed for accurate comparison. ZnO:Ga nanorods displayed the largest SE emission intensity as well as the greatest BSE emission intensity. Hydrogen plasma treatment reduced both SE and BSE emission intensity, whereas oxygen plasma treatment only reduced SE emission. These effects may help elucidate various optical as well as biological interactions of ZnO:Ga nanorods.
Keywords:
correlative microscopy; SEM; AFM; ZnO nanorods; plasma treatment
Available at various institutes of the ASCR
Correlative probe electron microscopy analysis of plasma-treated gallium-doped zinc oxide nanorods
Correlative Probe Electron Microscopy (CPEM) was used to investigate the topographical and electronic emission properties of gallium-doped zinc oxide nanorods (ZnO:Ga) after low pressure hydrogen or ...
NRGL provides central access to information on grey literature produced in the Czech Republic in the fields of science, research and education. You can find more information about grey literature and NRGL at service web
Send your suggestions and comments to nusl@techlib.cz
Provider
Other bases