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Unique exposure system for the whole body inhalation experiments with small animals
Večeřa, Zbyněk ; Mikuška, Pavel ; Dočekal, Bohumil ; Vojta, Šimon ; Míšek, Ivan ; Moravec, Pavel ; Smolík, Jiří
The especially inhalation chamber is constructed for chronic exposure studies of small animals to nanoparticles under strictly controlled conditions in frame of project „Study of transport of inhalated nano-sized particles (Pb, Cd) and their allocation in organs“. The inhalation chamber builds from a glass and stainless steel and makes possible long-term inhalation procedures (up to 60 days, 24 hours/day) with up to four discrete groups of mice population (up to 60 individuals each) or of rats population (up to 20 individuals each) under controlled illumination, temperature, relative humidity, doses (0.5 x 106 - 5 x 106 particles/cm3) and size (10-60 nm) of nano-sized particles which are synthesized via aerosol route in a hot wall tube flow reactor using metal organic precursors.
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Deposition ozone flux over a Norway spruce forest and correlation with
Zapletal, M. ; Cudlín, Pavel ; Chroust, P. ; Urban, Otmar ; Pokorný, Radek ; Edwards-Jonášová, Magda ; Czerný, Radek ; Janouš, Dalibor ; Taufarová, Klára ; Medlen, A. ; Večeřa, Zbyněk ; Mikuška, Pavel ; Skácel, F.
Measured and modelled results of ozone deposition and stomatal flux to a Norway spruce forest in locality Bílý Kříž in July and August 2008 were compared. Enhanced concentration of ozone decreased net ecosystem production, especially at higher temperatures and high intensity of global radiation.
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