Synthese eines daunomycin-modells mit honocyclischem aglycon

By condensation of (1S,3S)-1-acetyl-cyclohex-4-ene-1,3-diol ($\text{6}$) with daunosaminylchlorid $\text{7}$ predominatly the α-L-glycosid $\text{10}$ is obtained. As an anthracycline model containing all structural elements except those appropriate for intercalation this compound requires interest with respect to the elucidation of its complex formation with DNA.     

Number conserving relaxation-time approximation for second-order quantum response

The effect of damping on the quantum response of an electronic system is studied up to second order in an applied electro-magnetic field. This is accomplished by introducing a relaxation term into the equation of motion for the single particle density operator. This relaxation term contains a local chemical potential which is determined by requirements of gauge invariance and number conservation.     

Hauptideale und äußere Funktionen im RingH ∞

Ohne Zusammenfassung     

Calculated Auger emission spectrum of ammonia

Doubly ionized states of ammonia are calculated with Roothaan's symmetry-restricted open-shell SCF method. A GTO basis of double-ζ quality is used. Calculated energies compare well with previous calculations for the lowest doubly ionized states. Auger emission intensities are estimated using an analogy with the experimental Auger spectrum of neon.     

Intrinsic photorefractive effect of LiNbO3

The photorefractive effect of undoped LiNbO₃ crystals of high purity is studied by means of two-photon excitation of picosecond light pulses. We show that two-photon photorefractive recording is accompanied by characteristic changes of the optical absorption and electron spin resonance spectra due to the formation of color centers. The role of these centers for the photorefractive process in discussed.