Silylumlagerungen in den Massenspektren stereoisomerer 5-Methylcyclohexan-1,3-diol-TMS-äther

The formation of the rearrangement ions [R? O? Si(CH₃)₂]⁺ from [M – CH₃]⁺ ions of the epimeric 5-methylcyclohexane-cis -1,3-diol-TMS ethers is independent of the 5-Me configuration, in contrast to the sterochemical effect of the 5-Me group, in the eliminations from [M]⁺· of related derivatives.     

Paramagnetic relaxation in high-spin ferrous compounds

Measurements of three high-spin Fe^IIS₄ complexes at various temperatures and applied magnetic fields are reported and the results are compared with those of reduced rubredoxin. Simulations of the measured spectra by means of the fully developed stochastic theory of lineshape prove that intermediate relaxation behavior is present and is determined essentially by the phonon energy distribution and by one single parameter W₀, the scaling factor, which contains the strength of spin-lattice coupling.     

Adaptive-mesh radiation hydrodynamics—I. The radiation transport equation in a completely adaptive coordinate system

We formulate the radiation transport equation in a completely adaptive coordinate system, which we define as a system in which the mesh in spacetime, angles and frequency adapts automatically to the dynamical evolution of the radiation field and fluid flow.     

Surface activity of metastable colloidal solutions

Colloid and Polymer Science - On grinding a high melting crystal of a water insoluble saponin molecule, such as aescin, the particle size is reduced and a state being produced which is...     

Adaptive-mesh radiation hydrodynamics—II. The radiation and fluid equations in relativistic flows

We derive the radiation and fluid equations for relativistic flows in conservative from in a completely adaptive coordinate system.     

Features of hydrogen adsorption on a Ni(997) surface

The change of the initial sticking coefficient for a Maxwellian beam of hydrogen on Ni(997) has been determined as a function of beam temperature and angle of incidence. At low temperatures adsorption is governed by the steps, at high temperatures adsorption on the terraces is more dominant. Adsorption on the terraces is probably an activated process whereas adsorption on the step sites is non-activated. There seems to be little diffusion of undissociated H₂ between steps and terraces.     

Über Chloridsilicate des Calciums,Strontiums und Bariums

On Chloride Silicates of Calcium, Strontium, and Barium Alkaline earth chloride silicates are synthesized by heating of mixtures of CaCO₃, SrCO₃ or BaCO₃, and SiO₂ with different molar ratios in the melt of the relating alkaline earth chloride. They can be separated from an excess of chloride by methanol extraction. The structures of their silicate anions were investigated by the molybdate method and paper chromatographic separation. The compounds Sr₅[SiO₄]Cl₆, Sr₅[Si₂O₇]Cl₄, and Sr₈[Si₄O₁₂]Cl₈, hitherto unknown, were synthesized and compared with the compounds of calcium and barium in regard of their chloride contents, silicate anion structure and crystal structure.