Electron-nuclear double resonance spectra at 95 GHz and electron-spin-echo envelope-modulation spectra at 9.5 GHz are reported for a frozen solution of fully C-13 enriched C-60 molecules in their... Show moreElectron-nuclear double resonance spectra at 95 GHz and electron-spin-echo envelope-modulation spectra at 9.5 GHz are reported for a frozen solution of fully C-13 enriched C-60 molecules in their photoexcited triplet state. Analysis of these data reveals that the triplet wave function is largely localized on a part of the molecule. Upon excitation, the C-60 molecule adopts a structure of D-5d symmetry with four symmetry inequivalent carbon atoms. The equator atoms each carry 3.8% of the spin density and the atoms next to the equator 1.1%, together accounting for 98% of the total spin density. These pi-spin densities make the hyperfine interaction mainly anisotropic. A slight s-spin density on the equator atoms adds a sizable isotropic hyperfine coupling. The triplet wave function is calculated quantum-chemically and compared with the observed spin-density distribution. (C) 2000 American Institute of Physics. [S0021-9606(00)00716-9]. Show less
Heterologous expression of NodZ and NoIL proteins in Rhizobium leguminosarum by. viciae led to the production of acetyl fucosylated lipo-chitin oligosaccharides (LCOs), indicating that the NoIL... Show moreHeterologous expression of NodZ and NoIL proteins in Rhizobium leguminosarum by. viciae led to the production of acetyl fucosylated lipo-chitin oligosaccharides (LCOs), indicating that the NoIL protein obtained from Mesorhizobium loti functions as an acetyl transferase. We show that the NoIL-dependent acetylation is specific for the fucosyl penta-N-acetylglucosamine species. In addition, the NoIL protein caused elevated production of LCOs, Efficient nodulation of Lotus japonicus by the NodZ/NoIL-producing strain was demonstrated. Nodulation efficiency was further improved by the addition of the ethylene inhibitor L-alpha-(2-aminoethoxyvinyl) glycine (AVG). Show less
,,Die Stadt ist von einer aufrecht schmuckvollen Schönheit. Ja, wer im August über die Alster gen Winterhude fährt, wenn die Blumen alle blühn, in den Gärten vor den Häuschen an der Flut - der... Show more,,Die Stadt ist von einer aufrecht schmuckvollen Schönheit. Ja, wer im August über die Alster gen Winterhude fährt, wenn die Blumen alle blühn, in den Gärten vor den Häuschen an der Flut - der weiss, dass Hamburg die schönste Grossstadt in Deutschland ist. " (Alfred Kerr, 1928) Show less
"Op 14 juli 1789 maakte Lodewijk XVI zoals gewoonlijk een aantekening in zijn dagboek. In dit geval was die heel kort. Ze luidde: 'Rien!' Niets!" Heden ten dage vieren de... Show more"Op 14 juli 1789 maakte Lodewijk XVI zoals gewoonlijk een aantekening in zijn dagboek. In dit geval was die heel kort. Ze luidde: 'Rien!' Niets!" Heden ten dage vieren de Fransen diezelfde 14e juli 1789 nog steeds als de dag van de afrekening met het 'ancien regime', vanwege de bestorming en vernietiging van de Bastille. Show less
