Dein Suchergebnis zum Thema: Birken

Nobel Laureate Paul J. Crutzen has died | Max-Planck-Gesellschaft

https://www.mpg.de/16360356/obituary-paul-j-crutzen

Paul J. Crutzen passed away on 28 January 2021 at the age of 87 following several years of illness. Born in the Netherlands, he was Director of the Atmospheric Chemistry Department at the Max Planck Institute for Chemistry in Mainz from 1980 to 2000. “Paul J. Crutzen was a pioneer in many ways,“ says Martin Stratmann, President of the Max Planck Society. „He was the first to show how human activities damage the ozone layer. For his scientific work on the Earth’s atmosphere, he was awarded the Nobel Prize in Chemistry in 1995, together with Mario J. Molina and F. Sherwood Rowland. This knowledge about the causes of ozone depletion was the basis for the worldwide ban on ozone-depleting substances – a hitherto unique example of how Nobel Prize-winning basic research can directly lead to a global political decision.
In the early 1980s, together with his student John Birks

Helically twisted photonic crystal fibres | Max-Planck-Gesellschaft

https://www.mpg.de/11387153/helically-twisted-photonic-crystal-fibres

Photonic crystal fibres (PCF) are strands of glass, not much thicker than a human hair, with a lattice of hollow channels running along the fibre. If they are continuously twisted in their production, they resemble a multi-helix. Twisted PCFs show some amazing features, from circular birefringence to conservation of the angular momentum. The biggest surprise, however, is the robust light guidance itself, with no visible fibre core. The basis for this are forces which, like gravitation, are based on the curvature of space.
.; Birks, T. A.