Number of found documents: 6841
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Intercomparison of boundary layer and mixing layer height from models and ground-based measurements
Julaha, Kajal
2023 - English
In this study, we found that the boundary layer height tends to belower in ERA5 and timing for the daily peak also appears to differ\nas compared to ceilometer boundary layer data. In contrast, the ERA5 boundary layer observation was found to agree well with the mixing layer height obtained from the ceilometer. Whereas in comparison to HYSPLIT, GFS and GDAS, observations were found to agree well with ceilometer data while Reanalysis underestimated mixing layer height throughout the year. The seasonal changes in the boundary/mixing layer height were well captured by both models and the ceilometer. Keywords: planetary boundary layer; air pollution; measurements Available in a digital repository NRGL
Intercomparison of boundary layer and mixing layer height from models and ground-based measurements

In this study, we found that the boundary layer height tends to belower in ERA5 and timing for the daily peak also appears to differ\nas compared to ceilometer boundary layer data. In contrast, the ...

Julaha, Kajal
Ústav chemických procesů, 2023

INTRODUCTION TO PRAGUE AEROSOL CALIBRATION CENTER
Ondráček, Jakub; Roztočil, Petr
2023 - English
In general, the PACC offers a range of services, from calibration and consulting to methodology and technical development. Furthermore, the PACC has the capacity to organize and perform training for microphysical (including optical in the near future) aerosol in-situ instrumentation. The equipment at the PACC is fully in-line with the state of-the-art aerosol instrumentation (starting from various aerosol generators for welldefined nanoparticles, reference instruments, and newly designed calibration lines) and the laboratory space is flexible for various types of instrument calibration/verification/intercomparison or testing of newly developed, cutting-edge equipment. Keywords: calibration laboratory; ACTRIS; CPC Available in a digital repository NRGL
INTRODUCTION TO PRAGUE AEROSOL CALIBRATION CENTER

In general, the PACC offers a range of services, from calibration and consulting to methodology and technical development. Furthermore, the PACC has the capacity to organize and perform training for ...

Ondráček, Jakub; Roztočil, Petr
Ústav chemických procesů, 2023

PM1 UNDER THE MICROSCOPE: MULTI-ANNUAL AEROSOL OPTICAL PROPERTIES AND SIZE DISTIRBUTION OBSERVATION AT PERI-URBAN ATMOSPHERIC SITE ATOLL
Suchánková, Lenka; Bourrianne, E.; De Fillipi, R.; De Brito, J.F.; Riffault, V.; Prokeš, R.; Holoubek, I.; Ždímal, Vladimír; Crumeyrolle, S.
2023 - English
Atmospheric aerosols (AA) belong to short-lived climate forcers with high spatial and temporal variability. Although the radiative effects of AA are greatest on regional scales, changes in aerosol emissions can induce long-term global climate effects (Szopa et al., 2021). Thus, the measurement of aerosol properties is essential for better understanding of aerosol’s impact on health and climate. Although several international projects and platforms have been monitoring AA properties worldwide (GAW, WMO, ACTRIS, EMEP, EUCAARI, etc., Pandolfi et al., 2018), only PM10 or PM2.5 cutoff sizes have been used for measurements, and information about PM1 particles is missing. The aim of this study is to present aerosol scattering properties with supporting data of absorption and particle number size distribution in PM1 in years 2018-2022 at peri-urban atmospheric site Atmospheric Observations in LiLLE (ATOLL) in Lille, France. This study is the first to present results dedicated to aerosol scattering properties at this site. Keywords: scattering coefficient; nephelometer; fossil fuel and biomass burning contribution Available in a digital repository NRGL
PM1 UNDER THE MICROSCOPE: MULTI-ANNUAL AEROSOL OPTICAL PROPERTIES AND SIZE DISTIRBUTION OBSERVATION AT PERI-URBAN ATMOSPHERIC SITE ATOLL

Atmospheric aerosols (AA) belong to short-lived climate forcers with high spatial and temporal variability. Although the radiative effects of AA are greatest on regional scales, changes in aerosol ...

Suchánková, Lenka; Bourrianne, E.; De Fillipi, R.; De Brito, J.F.; Riffault, V.; Prokeš, R.; Holoubek, I.; Ždímal, Vladimír; Crumeyrolle, S.
Ústav chemických procesů, 2023

Recyklace solárních fotovoltaických panelů
Šperlich, Antonín
2023 - Czech
Dlouhodobé trendy ukazují zvyšující se instalovanou kapacitu solárních fotovoltaických elektráren. S tím je však také spojena velká produkce vyřazených panelů. Odhadované množství odpadních panelů se předpokládá mezi 60 a 80 miliony tun celosvětově okolo roku 2050. Takto velké objemy odpadů mohou tvořit zajímavý zdroj cenných látek, ale také nutnost recyklace kvůli životnímu prostředí. Příspěvek má za cíl popsat možnosti recyklace panelů a jejich využití ke stavbě reálné recyklační linky. Long-term trends show an increasing installed capacity of solar photovoltaic power plants. However, this is also associated with a large production of discarded panels. It is estimated that by 2050 there will be between 60 and 80 million tonnes of waste panels worldwide. Such large amounts of waste can be an \ninteresting source of valuable materials, but also need to be recycled for environmental reasons. The aim of this paper is to describe the possibilities of recycling panels and using them to build a real recycling line. Keywords: recycling; solar photovoltaic panels; technology design Available in a digital repository NRGL
Recyklace solárních fotovoltaických panelů

Dlouhodobé trendy ukazují zvyšující se instalovanou kapacitu solárních fotovoltaických elektráren. S tím je však také spojena velká produkce vyřazených panelů. Odhadované množství odpadních panelů se ...

Šperlich, Antonín
Ústav chemických procesů, 2023

Speciační analýzy s využitím generování hydridů
Matoušek, Tomáš
2023 - Czech
Přednáška prezentovala různé způsoby využití postupu generování hydridů- selektivní generování, postkolonové generování a generování s kryoseparací- v prvkových speciačních analýzách. Příklady z naší laboratoře zahrnovaly aplikace z oblasti klinické analýzy, analýzy potravin a přírodních vod. The lecture presented employing of different ways of hydride generation- selective generation, postcolumn generation and cryotrapping- useful of element speciation analysis. Examples from our laboratory covered applications from the field of clinical, food and natural water analysis. Keywords: hydrides generation; inductively coupled plasma mass spectrometry; speciation analysis Available on request at various institutes of the ASCR
Speciační analýzy s využitím generování hydridů

Přednáška prezentovala různé způsoby využití postupu generování hydridů- selektivní generování, postkolonové generování a generování s kryoseparací- v prvkových speciačních analýzách. Příklady z naší ...

Matoušek, Tomáš
Ústav analytické chemie, 2023

Generování těkavých sloučenin – účinná technika vnášení vzorku pro ICP-MS
Musil, Stanislav
2023 - Czech
V rámci této přednášky byly prezentovány různé techniky generování těkavých sloučenin (specií), možnosti spojení s ICP-MS a nedávné výsledky naší laboratoře v oblasti fotochemického generování těkavých specií přechodných prvků. Various techniques of volatile species generation, the ways of coupling to ICP-MS and recent results of our laboratory in the field of photochemical vapor generation of transition metals were presented in this lecture. Keywords: volatile species generation; inductively coupled plasma mass spectrometry; photochemical vapor generation Available at various institutes of the ASCR
Generování těkavých sloučenin – účinná technika vnášení vzorku pro ICP-MS

V rámci této přednášky byly prezentovány různé techniky generování těkavých sloučenin (specií), možnosti spojení s ICP-MS a nedávné výsledky naší laboratoře v oblasti fotochemického generování ...

Musil, Stanislav
Ústav analytické chemie, 2023

Analytická derivatizace pro identifikaci produktů elektrochemické oxidace fentanylů
Barták, P.; Skopalová, J.; Jerga, R.; Štolbová, D.; Navrátil, Tomáš; Langmaier, Jan
2023 - Czech
Analytická derivatizace a plynová chromatografie s hmotnostní spektrometrií se osvědčily jako\nvhodné nástroje pro identifikaci oxidačních produktů a řešení reakčního mechanismu\nelektrochemické oxidace fentanylů a dalších opioidů. Provedené experimenty potvrdily\npřítomnost fenylacetaldehydu a N-fenylpropanamidu v roztoku po elektrochemické oxidaci\nfentanylu. V případě sufentanilu byl jako odpovídající aldehydický produkt prokázán thiofen-\n2-ylacetaldehyd a v případě furanylfentanylu byl jako amidický produkt prokázán zcela\nanalogicky 2-furanilid. Analytical derivatization and GC-MS analysis were employed for the identification of main\nproducts from the electrochemical oxidation of fentanyl derivatives. Chemical derivatization\nprovides proof of the chemical reactivity of functional groups in oxidation products and serves\nfor the chemical conversion of target compounds into the second series of derivatives to confirm\nthe identification of particular products. Using the direct GC-MS analysis of oxidation products,\nderivatization of aldehydes with cysteamine and derivatization of amides by acidic hydrolysis\nand subsequent reaction with ethylchloroformiate, phenylacetaldehyde, and Nphenylpropanamide\nwere unambigously identified as oxidation products from fentanyl,\nthiophen-2-ylacetaldehyde, and N-phenylpropanamide from sufentanil, and\nphenylacetaldehyde and 2-furanilid from furanylfentanyl. Keywords: electrochemical oxidation; fentanyl; sufentanil; furanylfentanyl Available on request at various institutes of the ASCR
Analytická derivatizace pro identifikaci produktů elektrochemické oxidace fentanylů

Analytická derivatizace a plynová chromatografie s hmotnostní spektrometrií se osvědčily jako\nvhodné nástroje pro identifikaci oxidačních produktů a řešení reakčního mechanismu\nelektrochemické ...

Barták, P.; Skopalová, J.; Jerga, R.; Štolbová, D.; Navrátil, Tomáš; Langmaier, Jan
Ústav fyzikální chemie J. Heyrovského, 2023

Detailed Investigation of Human Galectins -1 and -3 by employing selectively deoxyfluorinated N-acetyllactosamines
Kurfiřt, Martin
2023 - English
This work is focused on a detailed investigation of supramolecular recognition events between human galectins -1 and -3 and monodeoxyfluorinated N-acetyllactosamine probes, which were previously prepared in our laboratory. The recognition was studied using a combination of X-ray crystallography, isothermal titration calorimetry and several advanced NMR techniques, such as 19F T2-filter, 1H–1H STD, 1H–15N CSP or 19F EXSY. These techniques provided insight into the thermodynamics and kinetics of recognition and enabled us to uncover of subtle differences between both investigated galectins. Such differences could be potentially exploited in the selective targeting of individual galectins with important implications for the galectins-focused\npharmaceutic industry. Keywords: galectins; NMR techniques; pharmaceutic industry Available in a digital repository NRGL
Detailed Investigation of Human Galectins -1 and -3 by employing selectively deoxyfluorinated N-acetyllactosamines

This work is focused on a detailed investigation of supramolecular recognition events between human galectins -1 and -3 and monodeoxyfluorinated N-acetyllactosamine probes, which were previously ...

Kurfiřt, Martin
Ústav chemických procesů, 2023

The electrodiffusional theory for wall shear stress measurement by a two-strip probe: a journey to near-wall region hydrodynamics
Harrandt, Václav
2023 - English
This contribution deals with a new theory describing mass transport in the vicinity of the measuring two-segment strip probe. Analytical formulas for the mass transfer coefficients of the front and the rear electrodes were derived. At the same time, the correctness of these formulas was confirmed by the numerical solution of the convectiondiffusion transport equation. Keywords: transport phenomena; electrodes; wall shear stress Available in a digital repository NRGL
The electrodiffusional theory for wall shear stress measurement by a two-strip probe: a journey to near-wall region hydrodynamics

This contribution deals with a new theory describing mass transport in the vicinity of the measuring two-segment strip probe. Analytical formulas for the mass transfer coefficients of the front and ...

Harrandt, Václav
Ústav chemických procesů, 2023

Influence of recreational activities on the distribution of forest wild boar rooting
Drimaj, J.; Balková, M.; Špoula, J.; Kamler, J.; Mikulka, O.; Plhal, R.; Homolka, Miloslav
2023 - English
The wild boar is a widely distributed and locally very numerous animal. The same is true in the conditions of Central Europe. Outside the growing season, it concentrates in forests, where it also actively searches for food sources. During this activity, it disturbs the soil surface, thereby significantly affecting the dynamics of the ecosystem. From an economic point of view, it limits the natural renewal of tree species, but from an ecological point of view, it changes habitat conditions and thus helps to increase biodiversity. Factors influencing the distribution of rooting across forest stands may be different. In this paper, we focused on the human factor and its influence on the rooting activity of wild boar in the Hodonínská Dúbrava, National natural monuments. Keywords: animal activity; disturbance; diversity; soil surface; wildlife Fulltext is available at external website.
Influence of recreational activities on the distribution of forest wild boar rooting

The wild boar is a widely distributed and locally very numerous animal. The same is true in the conditions of Central Europe. Outside the growing season, it concentrates in forests, where it also ...

Drimaj, J.; Balková, M.; Špoula, J.; Kamler, J.; Mikulka, O.; Plhal, R.; Homolka, Miloslav
Ústav biologie obratlovců, 2023

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