When wood cladding degenerates

Striatal glutamate degenerates thalamic neurons.

Glutamate (GLU)-induced excitotoxicity is considered to be a frequent cause of cell degeneration in basal ganglia disorders; it is normally prevented by uptake of GLU by astrocytes. We recently found that transient perfusion of GLU in the striatum induces persistent accumulation of GLU in striatal astrocytes that could be from the initial administration or caused by the slow release from neuron...

A pr 2 00 9 LIMITS OF CALABI - YAU METRICS WHEN THE KÄHLER CLASS DEGENERATES

We study the behaviour of families of Ricci-flat Kähler metrics on a projective Calabi-Yau manifold when the Kähler classes degenerate to the boundary of the ample cone. We prove that if the limit class is big and nef the Ricci-flat metrics converge smoothly on compact sets outside a subvariety to a limit incomplete Ricci-flat metric. The limit can also be understood from algebraic geometry.

Double degenerates and progenitors of supernovae type

We report on systematic radial velocity surveys for white dwarf – white dwarf binaries (double degenerates – DDs) including SPY (ESO Supernovae Ia progenitor survey) recently carried out at the VLT. A large sample of DD will allow us to put strong constrains on the phases of close binary evolution of the progenitor systems and to perform an observational test of the DD scenario for supernovae o...

Friction Surface Cladding FRICTION SURFACE CLADDING DEVELOPMENT OF A SOLID STATE CLADDING PROCESS

The fraction of double degenerates among DA white dwarfs

We present the results of a radial velocity survey designed to measure the fraction of double degenerates among DA white dwarfs. The narrow core of the Hα line was observed twice or more for 46 white dwarfs yielding radial velocities accurate to a few km s −1. This makes our survey the most sensitive to the detection of double degenerates undertaken to date. We found no new double degenerates i...