Gonococcal colony types can be distinguished by a new procedure that makes use of a dissecting microscope with a concave mirror and a fluorescent lamp. Critical adjustment of the mirror angle results in illumination similar to that obtained in the dark-field microscope. When the concave mirror is set at a certain angle, colonies of the lenticular types 1 and 2 refract the light coming through t...

Spin dependent hot electron transport and nanoscale imaging of metal/silicon structures In this work, we experimentally study spin-dependent hot electron transport through metallic multilayers (ML), containing single magnetic layers or “spin-valve” (SV) trilayers. For this purpose, we have set up a ballistic electron emission microscope (BEEM), a three terminal extension of scanning tunnelling ...