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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
Plný tet: SKMBT_C22016102412233 -  PDF
Plný text: content.csg - 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).
Plný tet: SKMBT_C22016102412242 - PDF
Plný text: content.csg - PDF
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Systém pro kontrolu rozměrů transportního nosiče
Vodička, Petr ; Dostál, Zbyněk (oponent) ; Antoš, Martin (vedoucí práce)
V bakalářské práci je zpracována rešerše týkající se průmyslově používaných senzorů pro bezkontaktní měření vzdálenosti, základní fyzikální principy detekce polohy či tvaru a popsány systémy vhodné pro měření ocelových konstrukcí. Je popsána geometrie transportního nosiče a jsou klasifikovány způsoby jeho možné deformace. Je navrhnut měřicí systém pro zjištění míry deformace transportního nosiče s cílem posoudit vhodnost jeho dalšího použití. Pro realizaci systému je vybrán a ozkoušen vhodný senzor a vypracována výrobní dokumentace měřicí brány.
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Vliv prachových částic na degradaci celulózy.
Bartl, B. ; Mašková, Ludmila ; Paulusová, H. ; Smolík, Jiří ; Bartlová, L. ; Vodička, Petr
Tento příspěvek se zabývá změnami, kterým podléhají celulózové filtry Whatman 41 v důsledku kontaminace prachovými částicemi a umělého stárnutí. Prachové částice\npocházely z archivních a knihovních depozitářů a byly charakterizovány jak z hlediska chemického složení, tak i distribuce velikosti. Změny, ke kterým došlo po umělém stárnutí, byly vyhodnoceny na základě stanovení průměrného polymeračního stupně (DPv) celulózy. Bylo zjištěno, že je možné pozitivně korelovat pokles DPv celulózy a množství deponovaného síranu amonného. Co se týká distribuce velikosti částic, bylo potvrzeno, že pro degradaci celulózy má rozhodující význam obsah částic průměru menšího, než 1 μm (PM1).\n
Plný tet: SKMBT_C22015120714361 - PDF
Plný text: content.csg - 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.
Plný tet: SKMBT_C22015102910282 - PDF
Plný text: content.csg - 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.
Plný tet: SKMBT_C22015102910281 - PDF
Plný text: content.csg - 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.
Plný tet: SKMBT_C22015102910271 - PDF
Plný text: content.csg - PDF
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