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1342
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Determination of cadmium by chemical vapour generation coupled with atomic fluorescence spectrometry
Štádlerová, Barbora; Sagapova, Linda; Musil, Stanislav
2022 - English
Development of a methodology for determination of cadmium based on chemical vapour generation coupled with atomic fluorescence spectrometry.
Keywords:
atomic fluorescence spectrometry; cadmium; chemical vapour generation
Available in digital repository of the ASCR
Determination of cadmium by chemical vapour generation coupled with atomic fluorescence spectrometry
Development of a methodology for determination of cadmium based on chemical vapour generation coupled with atomic fluorescence spectrometry.
Personal exposure measurement during dental nanocomposite grinding
Ždímal, Vladimír; Ondráčková, Lucie; Ondráček, Jakub; Schwarz, Jaroslav; Bradna, P.; Roubíčková, A.; Pelclová, D.; Rössnerová, Andrea
2022 - English
The purpose of this study was to measure the personal exposure of each participant of the study and to compare the results with those of static monitoring. Personal nanoparticle sam-plers (PENS), which can simultaneously detect both nanoparticles (PM0.1) and respirable parti-cles (PMA), were used to determine personal exposure (Tsai et al., 2012). Area monitoring in-cluded measurement of mass concentrations using the Berner Low Pressure Impactor (BLPI 25/0.018 /2, Hauke GmbH, Gmunden, Austria) and the Low Volume Sampler (LV5, Sven Leckel Ingenieurbüro GmbH, Germany). The number concentrations and their size distributions were measured with the Scanning Mobility Particle Sizer (5MP5 3936, T5I Inc., USA) and the Aerody-namic Particle Sizer (APS 3321, TSI Inc., USA). Measurements with all of the above- mentioned instruments were performed in four shifts with six participants per shift. Each participant milled for 10 minutes and then remained in the room until the group finished the session, so the total exposure lasted about 70 minutes. Due to the high content of filler nanoparticles, the nanocom-posite Filtek Ultimate (body A2, 3M ESPE, USA) was selected for these measurements.
Keywords:
dental treatment; personal exposure; nanocomposites
Available in a digital repository NRGL
Personal exposure measurement during dental nanocomposite grinding
The purpose of this study was to measure the personal exposure of each participant of the study and to compare the results with those of static monitoring. Personal nanoparticle sam-plers (PENS), ...
Multiplication of urea sites—impact on binding phosphates
Salvadori, Karolína
2022 - English
In our work, we focused on the synthesis of sensory groups based on urea structural motifs, suitable for binding phosphates. These units were tested for their selectivity and binding efficiency in HB competitive solvent (DMSO).\n
Keywords:
urea; phosphates; concentrations
Available in a digital repository NRGL
Multiplication of urea sites—impact on binding phosphates
In our work, we focused on the synthesis of sensory groups based on urea structural motifs, suitable for binding phosphates. These units were tested for their selectivity and binding efficiency in HB ...
A seven-years based characterization of aerosol light scattering properties at Central European rural site: Variability and source apportionment
Suchánková, Lenka
2022 - English
In addition, the sources of scattering aerosols, chemical composition, meteorological conditions, particle size distribution, and radiative forcing will be further investigated at NAOK to better understand the direct effects of aerosols on local climate.
Keywords:
organic aerosol; measurements; aerosol light scattering properties
Available in a digital repository NRGL
A seven-years based characterization of aerosol light scattering properties at Central European rural site: Variability and source apportionment
In addition, the sources of scattering aerosols, chemical composition, meteorological conditions, particle size distribution, and radiative forcing will be further investigated at NAOK to better ...
Use of photoautotrophic microorganisms in bioremediation of surface waters
Mušálková, Petra
2022 - English
The aim of my thesis is to develop an alternative method of removing this overplus of nutrients from surface waterbodies in a biological way, withthe use of microalgae and cyanobacteria. \n
Keywords:
microalgae; cyanobacteria; water eutrophication
Available in a digital repository NRGL
Use of photoautotrophic microorganisms in bioremediation of surface waters
The aim of my thesis is to develop an alternative method of removing this overplus of nutrients from surface waterbodies in a biological way, withthe use of microalgae and cyanobacteria. \n
Experimental study of bubble dynamics in aqueous solutions of simple alcohols: CFD validation data
Crha, Jakub
2022 - English
The aim of this work was to obtain experimental values of terminal velocities and shape deformations for a wide range of bubble sizes and compare them with theoretically calculated values. These data were obtained for the whole concentration range of aqueous solutions of 1-propanol and ethanol and will be used for validation of CFD results in\nfuture work.\n
Keywords:
bubble dynamics; water-alcohol mictures; viscosity
Available in a digital repository NRGL
Experimental study of bubble dynamics in aqueous solutions of simple alcohols: CFD validation data
The aim of this work was to obtain experimental values of terminal velocities and shape deformations for a wide range of bubble sizes and compare them with theoretically calculated values. These data ...
NMR-based metabolomic analysis of blood plasma as a pancreatic cancer diagnostic tool
Michálková, Lenka
2022 - English
In this work, 1H NMR metabolomic analysis of blood plasma was used as an alternative diagnostic tool of PC. The concentration profile of 58 metabolites was used to discriminate PC patients from long-term T2DM patients and healthy controls. Based on successful discrimination, a specific biomarker panel of eight metabolites was proposed.
Keywords:
pancreatic cancer; diagnostic tool; NMR-based metabolomic analysis
Available in a digital repository NRGL
NMR-based metabolomic analysis of blood plasma as a pancreatic cancer diagnostic tool
In this work, 1H NMR metabolomic analysis of blood plasma was used as an alternative diagnostic tool of PC. The concentration profile of 58 metabolites was used to discriminate PC patients from ...
Chemické složení a zdroje atmosférických aerosolů na pozaďové stanici Frýdlant
Lhotka, Radek; Pokorná, Petra; Vodička, Petr; Zíková, Naděžda; Ondráček, Jakub; Arora, S.; Poulain, L.; Hermann, H.; Schwarz, Jaroslav; Ždímal, Vladimír
2022 - English
This study assesses the variability of organic aerosol (OA) sources monitored at the rural background site Frýdlant. Non-refractory PM1 was evaluated in two seasons of\n2021. The positive matrix factorization with the multi-linear engine was used to determine the sources of OA at Frýdlant site, with four factors resolved both in winter and\nsummer.
Keywords:
organic aerosols; positive matrix factorization with multi-linear engine; non-refractive aerosol
Available in a digital repository NRGL
Chemické složení a zdroje atmosférických aerosolů na pozaďové stanici Frýdlant
This study assesses the variability of organic aerosol (OA) sources monitored at the rural background site Frýdlant. Non-refractory PM1 was evaluated in two seasons of\n2021. The positive matrix ...
Planetary Boundari Layer Effect on Vertical Transport of Black Carbon Concentration under Different Meteorological Conditions
Julaha, Kajal; Zíková, Naděžda; Mbengue, Saliou; Ždímal, Vladimír
2022 - English
In the present study, we analyzed the impact of equivalent black carbon (eBC) aerosols at two different heights (4 m and 230 m) on the PBL height under different \nmetrological conditions such as clear sky, foggy (visibility ≤ 1km), and hazy days (visibility ≤ 8km during the non-fog day), high relative humidity, temperature, and \nobservational data, also, diurnal and seasonal variability was evaluated.
Keywords:
PBL -eBC interaction; 250m-meteorological tower; meteorology
Available in a digital repository NRGL
Planetary Boundari Layer Effect on Vertical Transport of Black Carbon Concentration under Different Meteorological Conditions
In the present study, we analyzed the impact of equivalent black carbon (eBC) aerosols at two different heights (4 m and 230 m) on the PBL height under different \nmetrological conditions such as ...
10leté monitorování oxidačního stresu u osob profesionálně exponovaných nanočásticím pomocí neinvazivních metod
Pelclová, D.; Ždímal, Vladimír
2022 - Czech
Markery oxidačního stresu mohou být dostupnou metodou k monitorování efektu při inhalaci nanočásticím v pracovním prostředí, lze přitom využít neinvazivního odběru tekutin. Vzhledem k experimentálním studiím i výsledkům studií u pacientů s inhalačníexpozicí karcinogennímu SiO2 a azbestu je potřebné monitorovat expozici kromě měření \naerosolů v ovzduší také tímto expozičním testem z biologického materiálu. Minimální velikost skupiny je 20 pracovníků a 20 kontrolních osob ze stejné lokality. Doporučujeme \nvyšetřit alespoň jeden marker oxidace lipidů, nukleových kyselin a proteinů. Vhodné načasování je po směně na konci týdne, kdy markery oxidačního stresu ve všech třech \nbiologických tekutinách odrážejí jak akutní, tak chronický efekt expozice. Elemental contents were analyzed by scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM /EDS). The total particle number concentration \nranged from 1.98x104 to 5.4x105/cm3 and the nanoparticle fraction was 40-95%. Panels of oxidative stress biomarkers in the form of lipids, nucleic acids and protein damage were analyzed in exhaled breath condensate (EBC), plasma and urine pre-shift and post-shift using liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS /MS). Markers for oxidation of lipids, nucleic acids, and proteins in EBC and plasma were already elevated in pre-shift samples (p < 0.05) of workers compared to controls and showed additional post-shift elevation. The best time to collect all samples is post-shift at the end of the work week. Then, markers of oxidative stress in all three \nbiological fluids, including urine, reflect both acute (cross-shift) and chronic effects of exposure.
Keywords:
monitoring; nanoparticles; oxidative stress
Available in a digital repository NRGL
10leté monitorování oxidačního stresu u osob profesionálně exponovaných nanočásticím pomocí neinvazivních metod
Markery oxidačního stresu mohou být dostupnou metodou k monitorování efektu při inhalaci nanočásticím v pracovním prostředí, lze přitom využít neinvazivního odběru tekutin. Vzhledem k experimentálním ...
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