Nerve fiber node, TEM
Image SJ3630: Nerve fiber node. Colored transmission electron micrograph (TEM) of a cross-section through a nerve fiber (axon) at a node of Ranvier. The axon (blue) is surrounded by a fatty insulating sheath of myelin (green), which increases the speed of the nerve signal. Nodes of Ranvier are areas of exposed axon, with a high concentration of sodium channels. Instead of traveling continuously along the length of the axon, the impulse jumps between these nodes in a process called saltatory…
The Nikon Small World 2019 Competition Just Happened & Here Are The Top 20 Winners
The Nikon Small World Photomicrography Competition has been held for forty-five years now, celebrating the mesmerizing microscopic world and allowing scientists and enthusiasts alike to share their scientific and stunning images. Over 2000 photographs were submitted for the competition with micro-photographers from nearly 100 countries. The judges picked their top 20 images and the photo of a turtle embryo took the first place. Scroll down below to see all 20 photographs that made it to the…
Os 20 vencedores do concurso Nikon Small World 2019 revelam os detalhes microscópicos da natureza
O concurso de fotomicrografia do mundo pequeno da Nikon acontece há 45 anos, celebrando o mundo microscópico fascinante e permitindo que cientistas e