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I/O Aerosol in Kindergarten - Case Study.
Ondráček, Jakub ; Talbot, Nicholas ; Cusack, Michael ; Vodička, Petr ; Ždímal, Vladimír ; Schwarz, Jaroslav
In last decades, people spend more and more time indoors. When various indoor sources are present, the indoor air quality is driven mainly by these sources. Without the presence of significant indoor sources, the situation is very different and the concentration of aerosol particles in indoor environment follows behavior of outdoor particles (taking into account losses of aerosol particles due to deposition on indoor surfaces and during penetration indoors. Many epidemiological studies show direct link between dose/exposition to fine (< 1µm) and ultrafine (< 100 nm) particles and adverse health effects. With regards to the fact that indoor environment is besides the adults occupied usually also by kids in longer time periods, it is very important to study the indoor environment in a great detail and to understand the behavior of aerosol particles indoors. In the case of the kids being exposed to the indoor aerosol particles, the adverse health effect can be more pronounced and the consequences more dangerous. Nevertheles, at the same time it is necessary to monitor the outdoor environment as well by observing its changing daily pattern and trying to identify the possible sources of outdoor air pollution.\n
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22016102412233 - PDF
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Generation of NPS for Exposure Experiments from Copper Acetylacetone.
Moravec, Pavel ; Schwarz, Jaroslav ; Vodička, Petr ; Kupčík, Jaroslav ; Švehla, Jaroslav
Particles containing copper are emitted from smelters, iron foundries, power stations, and municipal incinerators (WHO, 1998) and also from brake linings during breaking, Kukutschová et al. (2011). Nanoparticles (NPs) of copper are ingredients in polymers, inks, and bioactive coatings inhibiting the growth of microorganisms, Cioffi at al. (2005), and CuO NPs has been used in antimicrobial textiles, Gabbay and Borkow (2006), therefore they can be easily inhaled. Even though CuO NPs were found highly toxic, Karlsson et al. (2008), in vivo studies of their toxicity are still rather rare. In this work we tested a method of long lasting nanoparticle generation from copper\nacetylacetonate (CuAA) for use in follow up exposure experiments with laboratory animals. The exposure chamber for inhalation experiments was constructed in the\nInstitute of Analytical Chemistry AS CR (Večeřa et al., 2011) and some methods of NPs generation for these experiments were already tested in our laboratory (Moravec et al., 2015, Moravec et al., 2016).
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22016102412242 - PDF
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System for measuring of pintrack dimensions
Vodička, Petr ; Dostál, Zbyněk (referee) ; Antoš, Martin (advisor)
In this bachelor thesis is processed a summary of contactless sensors for length measurement, that are commonly used in industry, it's physical principals and are described systems for measure dimensions of a steel construction. There is description of a steel carrier and classified ways the carrier can be deformed. A measuring gate for evaluation of status of steel carrier is designed and proper sensors are chosen and teste. Docomentation for measuring gate is created.
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The Effect of Dust Particles on Cellulose Degradation.
Bartl, B. ; Mašková, Ludmila ; Paulusová, H. ; Smolík, Jiří ; Bartlová, L. ; Vodička, Petr
This study focused on the changes in properties of cellulose-based paper Whatman 41, which can take place as a consequence of its contamination by dust particles. The chemical composition and size distribution of dust particles from archival repositories were analysed. After the artificial ageing, the viscosity-average degree of polymerization of cellulose DPv was measured. It was confirmed that cellulose-based paper can undergo substantial changes when contaminated by dust particles and artificially aged. The decrease of the DPv of cellulose showed a negative correlation with the deposited mass of sulfate ions in the dust particles. Considering the particle size fraction, the results suggest the decisive importance of the fine (PM1) particles. \n\n
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22015120714361 - PDF
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The Effect of Indoor Particles on Cellulose Degradation
Mašková, Ludmila ; Bartl, B. ; Smolík, Jiří ; Vodička, Petr
Indoor air pollution in libraries and archives can be harmful to paper-based materials stored there. Adverse effects caused by gaseous pollutants are well described, but less is known about airborne particles. The discussion regarding this issue mostly concerned the soiling of the paper, the possibility of surface abrasion or microbiological infestation (Hatchfield, 2002), but studies about the effect of particulate matter (PM) composition are scarce. This work was focused on the changes in the properties of cellulose-based paper caused by different size-resolved chemical components of PM.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22015102910282 - PDF
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Particle Size, Mass and Chemical Transitions from an Outdoor to Indoor Environment in Prague, Czech Republic with Attention to Nitrate
Talbot, Nicholas ; Kubelová, Lucie ; Makeš, Otakar ; Cusack, Michael ; Schwarz, Jaroslav ; Vodička, Petr ; Ondráček, Jakub ; Ždímal, Vladimír
As people spend most of their time indoors it’s important to understand how outdoor originating particulate can migrate indoors, their relative abundance indoors and how physico-chemical processes acting upon particulate can change the overall aerosol composition. Species volatility can complicate indoor data, change mass size distribution profiles, and implant artifacts on data measurements, enhancing uncertainty on results. This research describes the findings from high temporal resolution I/O, offline and online measurements, identifies outdoor aerosol loading dynamics and describes proportional compositions indoors relative to calculated I/O ratios.
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Plný tet: SKMBT_C22015102910281 - PDF
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Characterization of Submicron Aerosol in Prague by Combined ME-2 Factor Analysis of AMS Data
Makeš, Otakar ; Vodička, Petr ; Schwarz, Jaroslav ; Ždímal, Vladimír
Real-time measurement of submicron aerosol particles was performed at Prague – Suchdol site (Czech Republic) during six weeks long summer and winter campaigns in 2012-2013. Highly time and size resolved data were obtained from measurements carried out by a Compact Time-of-Flight Aerosol Mass Spectrometer (C-ToF-AMS, Aerodyne). The retrieved data were analyzed with using the So-Fi graphical user interface which is developed by Paul Scherrer Institute (Canonaco, 2013) and is running under IGOR software (WaveMetrics). The preliminary results are presented in this abstract.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22015102910271 - PDF
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