Search Results - "Vondrak, Tomas"

Seasonal variations of the Na and Fe layers at the South Pole and their implications for the chemistry and general circulation of the polar mesosphere by Gardner, Chester S., Plane, John M. C., Pan, Weilin, Vondrak, Tomas, Murray, Benjamin J., Chu, Xinzhao

“…Lidar observations, conducted at the South Pole by University of Illinois researchers, are used to characterize the seasonal variations of mesospheric Na and…”
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Negligible long-term temperature trend in the upper atmosphere at 23°S by Clemesha, Barclay, Simonich, Dale, Batista, Paulo, Vondrak, Tomas, Plane, John M. C.

“…Measurements of the vertical distribution of atmospheric sodium, made at São José dos Campos (23°S, 46°W) from 1972 to 2001 show a negligible net long‐term…”
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Dormancy breaking in Fagus sylvatica seeds is linked to formation of abscisic acid-glucosyl ester by Vondráková, Zuzana, Pešek, Bedřich, Malbeck, Jiří, Bezděčková, Lena, Vondrák, Tomáš, Fischerová, Lucie, Eliášová, Kateřina

“…Seed dormancy is an adaptive mechanism that allows seed germination under suitable environmental conditions. Germination of stored dormant seeds proceeds after…”
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A kinetic study of the reactions of Ca+ ions with O3, O2, N2, CO2 and H2O by Broadley, Sarah L, Vondrak, Tomas, Plane, John M C

“…The reactions between Ca(+)(4(2)S(1/2)) and O(3), O(2), N(2), CO(2) and H(2)O were studied using two techniques: the pulsed laser photo-dissociation at 193 nm…”
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Photoemission from Sodium on Ice:  A Mechanism for Positive and Negative Charge Coexistence in the Mesosphere by Vondrak, Tomas, Plane, John M. C, Meech, Stephen R

“…Photoemission from sodium deposited on ice films is described. Deposition of 0.02 ML of sodium is found to dramatically reduce the threshold for photoemission…”
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Influence of submonolayer sodium adsorption on the photoemission of the Cu(111)/water ice surface by Vondrak, Tomas, Plane, John M C, Meech, Stephen R

“…Photoemission from an ice film deposited on Cu(111) as a function of thickness has been observed in the presence and absence of sodium atoms at the…”
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Kinetic Study of the Reaction Ca+ + N2O from 188 to 1207 K by Plane, John M. C, Vondrak, Tomas, Broadley, Sarah, Cosic, Biljana, Ermoline, Alexandre, Fontijn, Arthur

“…Ion−molecule reactions involving metallic species play a central role in the chemistry of planetary ionospheres and in many combustion processes. The kinetics…”
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Kinetic Study of the Reaction Ca + + N 2 O from 188 to 1207 K by Plane, John M. C., Vondrak, Tomas, Broadley, Sarah, Cosic, Biljana, Ermoline, Alexandre, Fontijn, Arthur

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Seasonal variations of the Na and Fe layers at the South Pole and their implications for the chemistry and general circulation of the polar mesosphere by GARDNER, Chester S, PLANE, John M. C, WEILIN PAN, VONDRAK, Tomas, MURRAY, Benjamin J, XINZHAO CHU

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Photodesorption and photochemical dynamics on roughened silver: Sulphur dioxide and carbonyl sulphide by Burke, Daren J., Vondrak, Tomas, Meech, Stephen R.

“…The photodesorption of SO 2, both monolayer and multilayer, from roughened silver has been investigated. The photodesorption cross-section is enhanced by a…”
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Negligible long-term temperature trend in the upper atmosphere at 23°S by CLEMESHA, Barclay R, SIMONICH, Dale M, BATISTA, Paulo P, VONDRAK, Tomas, PLANE, John M. C

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Photochemistry of Fe(CO)5 Adsorbed on Single Crystal and Roughened Silver by Burke, Daren J, Vondrak, Tomas, Meech, Stephen R

“…The photochemistry of Fe(CO)5 adsorbed on silver at 89 K has been investigated by time-of-flight mass spectrometry, thermal desorption spectroscopy, and…”
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The dynamics and origin of NO photodesorbed from NO/Ag(111) by Vondrak, Tomas, Burke, Daren J, Meech, Stephen R

“…The photochemistry of the NO/Ag(111) system has been studied by time-of-flight, photon-induced desorption and temperature-programmed desorption measurements…”
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Numerical modelling of the excitation energy dependence of adsorbate photochemistry at metal surfaces by Vondrak, Tomas, Burke, Daren J., Meech, Stephen R.

“…The energy dependence of the photodesorption cross-section in the OCS/Ag(111) system is interpreted in terms of the hot electron attachment model including the…”
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Cation Vibrational Spectra of Indole and Indole−Argon van der Waals Complex. A Zero Kinetic Energy Photoelectron Study by Vondrák, Tomáš, Sato, Shin-ichiro, Kimura, Katsumi

“…Zero kinetic energy (ZEKE) photoelectron spectra of indole obtained via nine vibrational levels of the S1(1Lb) manifold (namely, 00, 422, 412, 29, 391421, 281,…”
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Gas-phase photoelectron studies of bis(cyclopentadienyl)titanium(III) halides by Vondrak, Tomas, Mach, Karel, Varga, Vojtech

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Sulfenic acids in the gas phase. Preparation, ionization energies and heats of formation of methane-, ethene-, and benzenesulfenic acid by Tureček, František, Brabec, Libor, Vondrák, Tomáš, Hanuš, Vladimír, Hájíček, Josef, Havlas, Zdeněk

“…Methane-, ethene-, and ethynesulfenic acids were generated in the gas phase by flash-vacuum pyrolysis of the corresponding tert-butyl sulfoxides at 400 °C and…”
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Zero Kinetic Energy (ZEKE) Photoelectron Spectroscopic Study of Thioanisole and Its van der Waals Complexes with Argon by Vondrák, Tomáš, Sato, Shin-ichiro, Špirko, Vladimír, Kimura, Katsumi

“…Two-color zero kinetic energy (ZEKE) photoelectron spectra due to the cation D0 states of thioanisole and its van der Waals complexes with argon…”
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(E-Z) Isomerization of α,β-unsaturated ketones by Vondrák, Tomáš, Procházka, Miloš

“…Thermodynamic parameters have been determined for the ( E-Z ) equilibria of title ketones X-CH=CH-CO-CH 3 (X = Cl, CH 3 , OCH 3 ); the energy difference of the…”
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(E-Z) Isomerism of vinyl sulfides and ethers by Procházka, Miloš, Vondrák, Tomáš, Poláková, Jana

“…Enthalpic data for the ( E-Z ) isomerisation of 1-methoxy-1-propene, 1-methylthio-1-propene, 1-methoxy-2-methylthioethene and 1,2-bis(methylthio)ethene were…”
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