No (1138)
Yes (946)
Number of found documents:
2084
Published from
to
The Influence of Air Humidity on the Optical Properties of Aerosol Particles.
Suchánková, Lenka
2021 - English
Atmospheric aerosol (AA) are ubiquitous particles in the atmosphere that influence Earth’s climatic system, environmental interactions,\nand human health. AA is emitted directly from primary sources or formed in the atmosphere via the oxidation of gas-phase precursors\nwith subsequent partitioning resulting in low-volatility products into the particle phase. Among AA, great interest is dedicated to organic\naerosol (OA) since it can represent from 20 to 90% of the total submicron mass.
Keywords:
atmospheric aerosol; laboratory and atmosphere; air humidity
Available in a digital repository NRGL
The Influence of Air Humidity on the Optical Properties of Aerosol Particles.
Atmospheric aerosol (AA) are ubiquitous particles in the atmosphere that influence Earth’s climatic system, environmental interactions,\nand human health. AA is emitted directly from primary sources ...
High Temperature Removal of Halogenated Compounds from Pyrolysis of Waste Plastic Polymers.\n
Šrámek, Vít
2021 - English
In this research the performance of selected adsorbents was tested in laboratory apparatus under model conditions with the mixture of\nHCl and simple non-condensing hydrocarbons.
Keywords:
waste plastic polymers; pyrolysis; halogenated compounds
Available in a digital repository NRGL
High Temperature Removal of Halogenated Compounds from Pyrolysis of Waste Plastic Polymers.\n
In this research the performance of selected adsorbents was tested in laboratory apparatus under model conditions with the mixture of\nHCl and simple non-condensing hydrocarbons.
Electrocoagulation of Microalga Chlorella vulgaris in Laboratory and Bench Scale.
Lucáková, Simona
2021 - English
In our laboratory we employed the process of electroflocculation with iron sacrificial anode leading to flocs formation in algae suspension and keeping the separated biomass food-grade at the same time.
Keywords:
microalgae; electrocoagulation; chlorella
Available in a digital repository NRGL
Electrocoagulation of Microalga Chlorella vulgaris in Laboratory and Bench Scale.
In our laboratory we employed the process of electroflocculation with iron sacrificial anode leading to flocs formation in algae suspension and keeping the separated biomass food-grade at the same ...
Removal of Contaminants from Water.
Spáčilová, Markéta
2021 - English
This study deals with commonly used plastics; polystyrene (PS), polytetrafluorethylene (PTFE), polyamide (PA), polyethylene glycol terephthalate (PET), polyethylene (PE), etc. Microplastic samples were prepared by abrasion from commonly available plastics to simulate real microplastic occurrence in the environment. Prepared samples were characterized by scanning electron microscopy (SEM), Raman spectroscopy and infrared spectroscopy (IR) to obtain their fingerprints. These characteristics can be applied as standards for characterization of real microplastics.
Keywords:
microplastics; solar radiation; micropolutants
Available in a digital repository NRGL
Removal of Contaminants from Water.
This study deals with commonly used plastics; polystyrene (PS), polytetrafluorethylene (PTFE), polyamide (PA), polyethylene glycol terephthalate (PET), polyethylene (PE), etc. Microplastic samples ...
Mikroplasty a jejich odstraňování z vod pomocí sorbentů.
Spáčilová, Markéta; Dytrych, Pavel; Krejčíková, Simona; Fajgar, Radek; Šolcová, Olga
2020 - Czech
Zvýšený výskyt cizorodých látek ve vodních zdrojích, ať už mikroplastů či dalších jiných organických kontaminantů je v současné době stále se zvyšující environmentální problém. Tato problematika úzce souvisí se zmapováním jejich výskytu ve vodním prostředí, a dále také s možnými způsoby jejich odstranění. V rámci práce byla nejprve provedena charakterizace připravených mikroplastových částic pěti nejčastěji používaných plastů (polyethylen, polyamid, polytetrafluorethylen, polyethylenglykoltereftalát a polystyren) pomocí skenovací elektronové mikroskopie (SEM), Ramanovy spektroskopie a infračervené spektroskopie (IČ). Tyto mikroplastové částice byly použity pro přípravu simulovaných vod kontaminovaných mikroplasty. Připravené simulované vzorky vod kontaminovaných mikroplasty byly využity pro vývoj metodiky určení počtu obsažených částic mikroplastů. Dále byly testovány možnosti odstranění mikroplastů ze vzorků pomocí sorbentů na bázi přírodních bentonitů a zeolitů. Bylo potvrzeno, že účinnost sorbentů závisí na jejich složení a texturních vlastnostech a může být zvýšena pomocí jejich modifikace. The occurrence of contaminants in water sources, microplastics or other organic pollutants, has been an increasing environmental problem. This issue is related to mapping of their occurrence in an aquatic environment and with finding of possible ways regarding their elimination. The prepared microplastic particles of five most-frequently used plastics (polyethylene, polyamide, polytetrafluoroethylene, polyethylene glycol terephthalate and polystyrene) were characterized by the scanning electron microscopy (SEM), the Raman spectroscopy and the infrared spectroscopy (IR). The obtained microplastic particles were used for preparation of simulated water contaminated with microplastics. The prepared simulated samples of water contaminated with microplastics were used for the development of a methodology for determining the number of contained microplast particles. Furthermore, the possibilities of a microplastic removal from simulated samples by sorbents based on natural bentonites and zeolites were tested. It was confirmed that the effectiveness of sorbents depends on their composition and textural properties and could be increased by their modification.
Keywords:
bentonity; microplastics; sorption
Available in digital repository of the ASCR
Mikroplasty a jejich odstraňování z vod pomocí sorbentů.
Zvýšený výskyt cizorodých látek ve vodních zdrojích, ať už mikroplastů či dalších jiných organických kontaminantů je v současné době stále se zvyšující environmentální problém. Tato problematika úzce ...
CFD Simulation of a Sub-millimetre Rising Bubble in a Stagnant Liquid.
Crha, Jakub; Basařová, P.; Kašpar, O.
2020 - English
Hydrodynamics of the multiphase apparatus is strongly affected by fluids used in the process. One of the main quantities, which determine the hydrodynamic behaviour is the rising velocity of gaseous bubbles. This velocity can be determined easily in small scale apparatuses, but it can be much more challenging in industrial-scale devices. For that reason, mathematical modeling is used. COMSOL Multiphysics, finite element CFD solver, was used to describe the behaviour of the single bubble rising in aqueous solutions of ethanol and n-propanol. Aqueous solutions of low-carbon alcohols are extensively used in many multiphase chemical processes such as distillation, flotation and in multiphase reactors. Bubble velocities and shapes obtained from the simulation were compared to experimental and theoretical values. Two initial diameters of bubbles were used – 0.6 and 0.8 mm. Terminal velocities and shapes deformations obtained from COMSOL of 0.6 mm bubble were in an agreement with theoretical and experimental values.
Keywords:
level set; bubble; single
Available in a digital repository NRGL
CFD Simulation of a Sub-millimetre Rising Bubble in a Stagnant Liquid.
Hydrodynamics of the multiphase apparatus is strongly affected by fluids used in the process. One of the main quantities, which determine the hydrodynamic behaviour is the rising velocity of gaseous ...
Laboratorní termolýzní testy vzorků peletizovaných sklizňových zbytků slunečnice a posklizňových zbytků zrnin.
Pohořelý, Michael; Skoblia, S.; Beňo, Z.; Hartman, Miloslav
2020 - Czech
Ve zprávě jsou výsledky laboratorních pyrolýzních testů peletizovaných sklizňových zbytků slunečnice a posklizňových zbytků zrnin. In the report there are results of laboratory pyrolysis analysis of pelleted sunflower harvesting residues and grain harvesting residues.
Keywords:
biomass; pyrolysis; biochar
Available at various institutes of the ASCR
Laboratorní termolýzní testy vzorků peletizovaných sklizňových zbytků slunečnice a posklizňových zbytků zrnin.
Ve zprávě jsou výsledky laboratorních pyrolýzních testů peletizovaných sklizňových zbytků slunečnice a posklizňových zbytků zrnin....
EDWork Manual IV. User Guide to EDWork 4.1
Sobolík, Václav; Wein, Ondřej
2020 - English
The presen report would serve as a user guide to the software package EDWork 4.1.
Keywords:
electrodiffusion technique; edwork manual; user guide
Available at various institutes of the ASCR
EDWork Manual IV. User Guide to EDWork 4.1
The presen report would serve as a user guide to the software package EDWork 4.1.
NMR Metabolomics Study of the Association between Pancreatic Cancer and Diabetes Mellrtus.
Michálková, Lenka; Horník, Štěpán; Sýkora, Jan; Habartová, L.; Setnička, V.
2019 - English
In our study, 1H NMR metabolomics was employed to plasma samples of pancreatic cancer patients, individuals with long-term diabetes mellitus type 2 (lasting more than 5 years) and healthy controls. The NMR analyses were followed by establishing a statistical model based on principal component analysis and discriminant analysis. The aim was to discover differences between these groups and to define a potential biomarker panel. The statistical evaluation of metabolomics-based profiles provided high values of sensitivity and specificity. Subsequently, plasma samples of the risk group, specifically patients with recently diagnosed diabetes mellitus with a duration of <3 years (possible T3cDM), were analysed and the possibility of PC development was predicted. The achieved results showed strong potential of 1H NMR metabolomics to establish a biomarker panel that would facilitate the early diagnosis of PC and the possibility identify diabetic individuals, who are at risk of developing PC.
Keywords:
pancreatic cancer; nmr analyses; biomarker panel
Available in a digital repository NRGL
NMR Metabolomics Study of the Association between Pancreatic Cancer and Diabetes Mellrtus.
In our study, 1H NMR metabolomics was employed to plasma samples of pancreatic cancer patients, individuals with long-term diabetes mellitus type 2 (lasting more than 5 years) and healthy controls. ...
Dialytic Separation of Anions from DMSO Solution Facilitated by dendritic Receptors.
Cuřínová, Petra; Winkler, Maximilian; Krupková, Alena; Budka, J.; Wun, Ch.N.; Blechta, Vratislav; Červenková Šťastná, Lucie; Sýkora, Jan; Strašák, Tomáš
2019 - English
As the dialytic tubing is impermeable for big molecules of receptor, the anions crossing the barrier of dialytic tubing to form complex with the receptor stay entrapped inside and can be removed from the solution. NMR methods were used to study the complexation properties of given receptors as well as to determine the concentration changes during dialytic experiments.
Keywords:
anions; receptor; dialytic experiments
Available in a digital repository NRGL
Dialytic Separation of Anions from DMSO Solution Facilitated by dendritic Receptors.
As the dialytic tubing is impermeable for big molecules of receptor, the anions crossing the barrier of dialytic tubing to form complex with the receptor stay entrapped inside and can be removed from ...
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