|
| |
|
| |
|
|
Penetration Through CE-Marked Respirators - Cut-Based Versus Manikun-Based Method
Ondráček, Jakub ; Serfozo, N. ; Zíková, Naděžda
This work presents size-resolved penetration testing of 13 commercially available filtering facepieces (FFP1, FFP2 and FFP3 filtering classes) on pieces of filtration material (47 mm in diameter) cut from various FFRs (referred as cut-based). Second objective of this work was to measure the size-resolved penetration of 9 complete FFRs (selected from identical filtering facepieces as in the first case) placed on the manikin (refered as manikin-based). The results obtained by these two methods were compared and the real MPPS of all FFRs obtained by both methods were estimated.
Plný tet: SKMBT_C22015102910290 -  PDF
Plný text: content.csg - PDF
|
|
|
Long Lasting ZnO Nanoparticle Synthesis for Potential Use in Inhalation Experiments
Moravec, Pavel ; Kupčík, Jaroslav
In this work we tested the long term generation of ZnO-NPs for potential use in exposure experiments with laboratory animals. These experiments require the generation of NPs in the gas phase with appropriate number concentration (Nt>1 107 #/cm3) and geometric mean diameter (GMD<50 nm) in duration of several weeks. Several methods of gas phase ZnO-NPs synthesis using metalorganic precursors, such as zinc acetylacetonate, zinc tetramethylheptane dionate or diethylzinc were reported in the literature. However, NPs prepared from metalorganic precursor are usually more or less contaminated by elemental (EC) or organic (OC) carbon. Therefore we used metallic zinc as a precursor in this study.
Plný tet: SKMBT_C22015102910283 - PDF
Plný text: content.csg - PDF
|
|
|
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
|
|
|
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
|
|
|
Binární nukleace H2SO4 v laminární souproudé komoře
Trávníčková, Tereza ; Havlica, Jaromír ; Škrabalová, Lenka ; Hrubý, Jan ; Ždímal, Vladimír
Nukleace kyseliny sírové s vodou je jedním z klíčových procesů vzniku nových částic v atmosféře. Přesto, že první experimenty zabývající se binární nukleacií H2SO4- H2O se objevily již v sedmdesátých letech 19. století, její mechanismus stále ještě není zcela popsán. Je to způsobeno především obtížně definovatelnými atmosférickými podmínkami, za kterých k nukleaci dochází, a náročností laboratorních experimentů, které tento jev zkoumají. V tomto příspěvku představujeme inovovaný typ zařízení na měření binární nukleace – laminární souproudou komoru (LCFT). První výsledky naměřené na LCFT ukazují, že se jedná o relevantní nástroj ke studiu binárních nukleací.
Plný tet: SKMBT_C22015102910280 - PDF
Plný text: content.csg - PDF
|
|
| |
|
|
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
|
|
| |
host ::
RSS.