National Repository of Grey Literature 32 records found  beginprevious22 - 31next  jump to record: Search took 0.01 seconds. 
Insekticidní aktivita rostlinných extraktů izolovaných různými metodami
Sajfrtová, Marie ; Sovová, Helena ; Karban, Jindřich ; Pavela, R.
The aim of this study was to compare the insecticidal activity of extracts obtained by SFE and traditional extraction method. Three types of extracts were prepared using the benefit of variable solvent power of supercritical carbon dioxide under different experimental conditions. Composition and product activities of the CO2 extracts were compared with hydrodistillation (HD) and Soxhlet extraction. The composition of volatile compounds in the isolates was determined by gas chromatography, and the toxicity and antifeedant effects of the extracts on larvae of Colorado potato beetle were evaluated.
Polycyclic Aromatic Hydrocarbons in the Atmosphere of Large Towns. An Expert Study Intend to Origin and Occurence of These Matters in Different Localities of Prague in Particular Seasons
Tydlitát, Vratislav ; Kotlík, B. ; Karban, Jindřich
Results of measurement of polycyclic aromatic hydrocarbons in part in atmosphere, in part on aerosols from atmosphere and in dust from aircondition taken on eight places in Prague inclusive two traffic tunnels in years 2005 to 2007 are presented. Spectra of PAHs from aerosols of the traffic tunnel in two followend years (2006,2007) are not full identical. We anscribe the alternation to consecutive change of the car flotile and to the change of composition of fuels with ecologic components.
Identification of Emissions from Internal-Combustion Engines in the Atmosphere of Prague. Diesel Engines
Tydlitát, Vratislav ; Horáček, Jan ; Schwarz, Jaroslav ; Karban, Jindřich ; Kotlík, B.
The non-carbon element composition of aerosols from tunnels determined in spring 2006 corresponds to the composition of aerosols collected in spring 2005 in Prague 10 at a busy street (R2 =0,96). Non-carbon element composition of aerosols from tunnels S and M determined in July 2006 is close to the composition of aerosols collected in July 2005 in Prague 10 (R2 =0,9 a 0,98) and also to the data from a street with heavy traffic in Prague 5 - Radotín. Based on these findings, we see the potential of utilizing the non-carbon composition data from tunnel aerosols for the detection of aerosol generated by heavy road traffic in other locations.
Identification of Bounds between Qualitative Parameters of Aerosols and Their Place of Occurence
Tydlitát, Vratislav ; Pekárek, Vladimír ; Šyc, Michal ; Schwarz, Jaroslav ; Karban, Jindřich
Results of measurements of aerosols obtained by 24hour taking in two localities in Prague during the year 2004 and in three localities during the year 2005 are presented.

National Repository of Grey Literature : 32 records found   beginprevious22 - 31next  jump to record:
See also: similar author names
1 Karban, Jan
1 Karban, Jaroslav
1 Karban, Jiří
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