via infinity-imagined: Neurons growing in a cell culture These time lapse animations use phase contrast microscopy to show neural stem cells in a nutrient medium for 4 hours. They reveal the dynamic growth and recycling of dendrites and synapses as neurons establish relationships with each other. The social behavior of these cells creates the incredible properties of the mind and brain. Credit: University of Victoria Medical Sciences
Coiled coil filament. For many years they have been used in light bulbs. But these tungsten filaments are especially important to us. You wonder why? We need them as electron sources in some of our electron microscopes. They serve as cathodes to genereate the electrons for the beam. If the temperature reaches a certain point tungsten emits not only photons but also electrons which are then accelerated and focused by magnetic lenses towards the specimen. FELMI-ZFE #electronmicroscopy
The picture shows a model of one of the SAPN particles that has been constructed by Newton Wahome based on a tiling by Giuliana Indelicato, illustrating how tiling theory predicts the surface architecture of the nanoparticle. Wahome and Indelicato are the joint first authors of this paper.