Number of found documents: 432
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Optimization of photochemical vapor generation of molybdenum as a sample introduction for ICP-MS
Šoukal, Jakub; Musil, Stanislav
2018 - English
Conditions of photochemical vapor generation of molybdenum with ICP-MS detection have been in detail investigated. Keywords: ICP-MS; molybdenum; photochemical vapor generation Available at various institutes of the ASCR
Optimization of photochemical vapor generation of molybdenum as a sample introduction for ICP-MS

Conditions of photochemical vapor generation of molybdenum with ICP-MS detection have been in detail investigated.

Šoukal, Jakub; Musil, Stanislav
Ústav analytické chemie, 2018

Microfluidic device for cell counting and electrical lysis
Václavek, Tomáš; Křenková, Jana; Foret, František
2018 - English
This lecture presents two microfluidic devices as essential units for single cell proteomic analysis; firstly a device for cell counting based on resistive pulse sensing as an alternative to optical platforms based on visual control over the sample input, secondly a unit for electrical lysis of cells using direct current voltage pulses to lyse cells one by one with a possibility to analyze the distinct lysate zones by electrospray ionization mass spectrometry. Keywords: microfluidic devices; microextraction of basic drugs; single cell proteomic analysis; electrospray ionization mass spectrometry; cell lysis Fulltext is available at external website.
Microfluidic device for cell counting and electrical lysis

This lecture presents two microfluidic devices as essential units for single cell proteomic analysis; firstly a device for cell counting based on resistive pulse sensing as an alternative to optical ...

Václavek, Tomáš; Křenková, Jana; Foret, František
Ústav analytické chemie, 2018

Impact of post-harvest processing, geographical locality and production year on quality of selected medicinal plants
Burdějová, Lenka; Polovka, M.; Pořízka, J.
2018 - English
This study deals with the assessment of the impact of post-harvest treatment, geographical location and production years on 32 selected characteristics of medicinal plants grown in the Czech Republic. Dimethyl sulfoxide herbal extracts characteristics were evaluated by spectroscopic and chromatographic techniques. The results were processed by analysis of variance and multivariate statistical tools. Obtained results clearly proved the successful differentiation of herbal samples by means of canonical discrimination analysis according to post-harvest treatment (100%), geographical origin (82.9%) and production year (96.1%) confirming that studied factors may have significant effect on quality of medicinal plants. Keywords: HPLC-DAD; ICP-OES; plants extracts; herbal extracts Fulltext is available at external website.
Impact of post-harvest processing, geographical locality and production year on quality of selected medicinal plants

This study deals with the assessment of the impact of post-harvest treatment, geographical location and production years on 32 selected characteristics of medicinal plants grown in the Czech Republic. ...

Burdějová, Lenka; Polovka, M.; Pořízka, J.
Ústav analytické chemie, 2018

A Validatation of non-invasive method for diagnostic of cystic fibrosis based on ion ratios determined by CE-C4D
Ďurč, P.; Lačná, J.; Dosedělová, V.; Foret, František; Homoľa, L.; Pokojová, E.; Malá, M.; Skřičková, J.; Dastych, M.; Vinohradská, H.; Dřevínek, P.; Skalická, V.; Kubáň, Petr
2018 - English
A validation of novel approach for diagnosis of cystic fibrosis (CF) is presented. The method is very simple and fast, since for collection of samples, only wiping of the skin of forearm is needed. The collected sample is analyzed by capillary electrophoresis with contactless conductometric detection (CE-C4D). Ion ratios are determined as ratios of peak area of chloride anion and peak areas of selected cations. It is possible to distinguish between cystic fibrosis patients and healthy individuals when ion ratio is applied as diagnostic factor. In here, we present analytical parameters of developed method (limits of detection, limits of quantification, repeatability of migration times, repeatability of peak areas) and ROC curve, which reveals high sensitivity and specificity of the developed method. Keywords: method for diagnostic of cystic fibrosis; cystic fibrosis; capillary electrophoresis with contactless conductometric detection Fulltext is available at external website.
A Validatation of non-invasive method for diagnostic of cystic fibrosis based on ion ratios determined by CE-C4D

A validation of novel approach for diagnosis of cystic fibrosis (CF) is presented. The method is very simple and fast, since for collection of samples, only wiping of the skin of forearm is needed. ...

Ďurč, P.; Lačná, J.; Dosedělová, V.; Foret, František; Homoľa, L.; Pokojová, E.; Malá, M.; Skřičková, J.; Dastych, M.; Vinohradská, H.; Dřevínek, P.; Skalická, V.; Kubáň, Petr
Ústav analytické chemie, 2018

Acetonitrile-assisted enzymatic digestion used for analysis of proteins of cancer origin
Laštovičková, Markéta; Bobál, P.; Strouhalová, Dana; Bobálová, Janette
2018 - English
In this study, in-gel trypsin digestion protocol using aqueous-acetonitrile solvent system was developed to facilitate bottom-up proteomic identification of proteins isolated from human breast cancer cells. Keywords: breast cancer cells; enzymatic digestion; MS analysis Fulltext is available at external website.
Acetonitrile-assisted enzymatic digestion used for analysis of proteins of cancer origin

In this study, in-gel trypsin digestion protocol using aqueous-acetonitrile solvent system was developed to facilitate bottom-up proteomic identification of proteins isolated from human breast cancer ...

Laštovičková, Markéta; Bobál, P.; Strouhalová, Dana; Bobálová, Janette
Ústav analytické chemie, 2018

Capillary electrophoresis in clinical diagnosis and monitoring
Kubáň, Petr
2018 - English
There is a significant potential of CE to provide a useful analytical tool to analyze noninvasive samples of body fluids and stimulate the cooperation between analytical chemists and clinicians in this interdisciplinary field. Keywords: CE; CE-LIF; clinical diagnosis Available in digital repository of the ASCR
Capillary electrophoresis in clinical diagnosis and monitoring

There is a significant potential of CE to provide a useful analytical tool to analyze noninvasive samples of body fluids and stimulate the cooperation between analytical chemists and clinicians in ...

Kubáň, Petr
Ústav analytické chemie, 2018

Supercritical water in etching and morphing of siliceous surfaces for analytical separations
Karásek, Pavel; Horká, Marie; Planeta, Josef; Roth, Michal
2018 - English
Applications of supercritical water in etching and morphing of siliceous surfaces for analytical separations are briefly reviewed. Keywords: supercritical water; fused silica capillary; electromigration methods Available in digital repository of the ASCR
Supercritical water in etching and morphing of siliceous surfaces for analytical separations

Applications of supercritical water in etching and morphing of siliceous surfaces for analytical separations are briefly reviewed.

Karásek, Pavel; Horká, Marie; Planeta, Josef; Roth, Michal
Ústav analytické chemie, 2018

Droplet-based microfluidic chip with passive mixer for analysis with photon-upconversion nanoparticles
Křivánková, Jana; Přikryl, Jan; Hlaváček, Antonín
2018 - English
Mixing of the fluids in microfluidic chips is important especially in applications, where droplet contents need to be rapidly homogenized. Here, a passive method for mixing in polydimethylsiloxane (PDMS) microchannels is presented. Droplet homogenization was firstly tested with organic stains and subsequently applied for mixing water dispersions of photon-upconversion nanoparticles (UCNPs).\n Keywords: microfluidic chips; microfluidic systems; photon-upconversion nanoparticles Fulltext is available at external website.
Droplet-based microfluidic chip with passive mixer for analysis with photon-upconversion nanoparticles

Mixing of the fluids in microfluidic chips is important especially in applications, where droplet contents need to be rapidly homogenized. Here, a passive method for mixing in polydimethylsiloxane ...

Křivánková, Jana; Přikryl, Jan; Hlaváček, Antonín
Ústav analytické chemie, 2018

A Microfluidic devide for monitoring cell migration
Ledvina, Vojtěch; Klepárník, Karel; Legartová, Soňa; Bártová, Eva
2018 - English
A polydimethylsiloxane microfluidic device for monitoring directed cell migration was developed. The device comprises a main channel barred by pillar arrays with decreasing spacing and utilizes chemotactic movement of cells in the direction of increasing gradient of fetal bovine serum. HeLa cell line transfected with Premo FUCCI Cell Cycle Sensor was used as a model organism. The cells were imaged for several days using a scanning confocal microscope and the rate of migration in different cell cycle phases was evaluated. Keywords: microfluidic device; cell migration; Premo FUCCI Cell Cycle Sensor Fulltext is available at external website.
A Microfluidic devide for monitoring cell migration

A polydimethylsiloxane microfluidic device for monitoring directed cell migration was developed. The device comprises a main channel barred by pillar arrays with decreasing spacing and utilizes ...

Ledvina, Vojtěch; Klepárník, Karel; Legartová, Soňa; Bártová, Eva
Ústav analytické chemie, 2018

Affinity microfluidic chip based on packed microbeads
Novotný, Jakub; Ostatná, Veronika; Foret, František
2018 - English
In this project, a plastic device was fabricated using CNC milling in polycarbonate. Chip contains integrated pneumatic valves for flow control and allows for injection and stacking of beaded supports. Intended use of these supports is formation of packed affinity columns suitable for glycoprotein assays. Keywords: microfluidic chips; microfluidic systems; microfluidic devices Fulltext is available at external website.
Affinity microfluidic chip based on packed microbeads

In this project, a plastic device was fabricated using CNC milling in polycarbonate. Chip contains integrated pneumatic valves for flow control and allows for injection and stacking of beaded ...

Novotný, Jakub; Ostatná, Veronika; Foret, František
Ústav analytické chemie, 2018

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