71 research outputs found
Combination of unsaturated fatty acids and ionizing radiation on human glioma cells: cellular, biochemical and gene expression analysis
Synchrotron radiation study of the RgCI*, Rg
In a Cl2 + Rg doped neon matrix, the RgCl* and Rg2Cl* excimers are not formed from a primary excitation of the free or complexed molecular chlorine. They are only observed when Cl atoms or RgCl van der Waals complexes preexist in the Ne matrix after photolysis of Cl2. The XeCl* B1/2 and C3/2 states are shown to be nearly isoenergetic. The vibrational structure of the D1/2 state is resolved for the first time
Molar absorptivities of 2,4-D, cymoxanil, fenpropidin, isoproturon and pyrimethanil in aqueous solution in the near-UV.
Uptake measurements of ethanol on ice surfaces and on supercooled aqueous solutions doped with nitric acid between 213 and 243 K
Vacuum ultraviolet spectroscopy of the molecule trapped in pure neon, pure argon, or mixed neon–argon matrices
Synchrotron radiation excitation and emission spectra with lifetime measurements are reported for the first time in the VUV region for systems consisting of Cl molecules trapped in a neon matrix, an argon matrix, and mixed Ar/Ne matrices. In pure neon, the emission spectrum of the D’→A’ ‘‘laser’’ transition at 4.7 eV of the Cl molecule is vibrationally well resolved and constitutes an interesting example of UV spectroscopy of a matrix ‘‘isolated’’ molecule. In pure argon or mixed Ar/Ne matrices, new broad emissions at 4.1, 3.8, and 3.5 eV are clearly identified, which result from the specific interaction between Cl*2 and Ar and are attributed to different charge–transfer states of the ArClCl entity. The Ar concentration dependence and the time‐gated spectra are shown to be especially useful in interpreting the large differences observed between the pure neon and the pure argon matrix case
Site effects in the VUV-spectroscopy of chlorine atoms in neon matrices
Excitation and emission spectra of chlorine atoms isolated in neon matrices were studied in the VUV spectral range using synchrotron radiation. Spectra of the electronic transitions between the P ground state and the first P and D excited states clearly show the existence of three different possible sites for the chlorine atom in a neon surrounding. by annealing, a rearrangement takes place so that only one site is left. The fine structure of the excitation and emission peaks shows the spin-orbit splittings of the electronic states with values very close to the gas phase.Are you connected with an institution? Enjoy full time acces
Near-UV molar absorptivities of alachlor, mecroprop-p, pendimethalin, propanil and trifluralin in methanol.
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Aldehydes and BTEX measurements and exposures in university libraries in Strasbourg (France).
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