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A theory of the luminescence lifetime of a radiation-damped classical electrical point dipole near a plane interface to a medium with different optical constants is given. The influence of the interface on the lifetime of the dipole is calculated in first approximation with the methods of molecular optics. Theoretical and experimental results for a purely dielectric interface are compared.
The relative stability of the siliconbromidechlorides is discussed on the timedependence of the dismutation reaction of SiCl3Br, on the measured appearence potentials of SiCl3, from SiCl3Br and SiCl4 respectively and on the enthalpies of the hydrolysis reactions. The relative strengths of the Si-Br-bonds of the different compounds were estimated, using SiCl4 as a standard.
Zivilrecht
(1974)
Wirtschaftsrecht
(1974)
The near and far UV spectra of the aminoboranes (Me2N)n B X3-n, n = 1, 2, 3, Me=CH3, X= H, Me, F, Cl, Br are presented. In most of the monoamino boranes the π→π * transitions dominate. In the di- and triamino boranes there were additionally found a Rydberg series and some single Rydberg transitions, partly preceding the π→π * band. The Rydberg assignments were settled particularly by comparing the band positions of the compounds relatively to their ionization energies.
Está situado en la pequeña ciudad de Hoechst, formando parte de un amplio complejo con gran extensión de zonas verdes y viales. Se compone de tres cuerpos de planta hexagonal, K705, K706, K 707, enlazados entre sí por otro en forma de Y, K704. Todo este conjunto se une, mediante un paso cubierto, al denominado K 703, cuya planta adopta la forma de S. La construcción es de escasa altura —dos plantas y sótano—, albergando toda la serie de dependencias necesarias para el funcionamiento de la Central de Cálculo de una firma de gran importancia: sala de máquinas, despachos, almacenes de papel, etc. La construcción es de hormigón armado, en general, sobre una retícula triangular de 7,50 m de lado.