고든의 블로그 구글 분점

  ( This artist's concept shows the violent collision of two massive objects in orbit around the star Fomalhaut. Credit: NASA, ESA, STScI, Ralf Crawford (STScI) ) ​ ( This artist's concept shows the sequence of events leading up to the creation of dust cloud cs2 around the star Fomalhaut. In Panel 1, the star Fomalhaut appears in the top left corner. Two white dots, located in the bottom right corner, represent the two massive objects in orbit around Fomalhaut. In Panel 2, the objects approach each other. Panel 3 shows the violent collision of these two objects. In Panel 4, the resulting dust cloud cs2 becomes visible and starlight pushes the dust grains away from the star. Credit: NASA, ESA, STScI, Ralf Crawford (STScI) ) ​ ( This composite Hubble Space Telescope image shows the debris ring and dust clouds cs1 and cs2 around the star Fomalhaut. For comparison, dust cloud cs1, imaged in 2012, is pictured with dust cloud cs2, imaged in 2023. The dashed circles mark the location ...

  ( The image taken at the CFcryo-EM (Core Facility for cryo-Electron Microscopy) captures the moment during which a vesicle (arrow) fuses with the cell membrane. By superimposing several electron microscopy images – a process known as electron tomography – it is possible to see how many vesicles are waiting at the end of a nerve cell to release their biochemical messengers into the synaptic cleft. This space between two nerve cells can be seen as a double line in the image. Credit: Jana Kroll, Charité / Max Delbrück Center ) ​ ​ ( Confirmation of synaptic glutamate release in stimulated, cryofixed neurons. Credit: Nature Communications (2025). DOI: 10.1038/s41467-025-67291-6 ) ​ ​ 뉴런의 핵심 부위는 말단인 시냅스 (synapse)입니다. 시냅스를 통해 신경 전달 물질이 나오고 다음 뉴런에게 정보를 전달하는 과정을 통해 뇌에서 정보가 처리됩니다. AI에서 적용되는 인공신경망 역시 이 구조를 모방한 것입니다. 과학자들은 시냅스에서 어떤 신경 전달 물질이 나오는지 잘 알고 있습니다. 이 신경 관련 물질들은 신경 말단에 있는 작은 주머니인 소포체 (vesicle)에 담겨 있다가 방출됩니다. 하지만 실제로 이 과정을 직접 현미경으로 본 사람은 없었습니다. 너무 작은 공간에서 밀리초 단위로 일어나는 일이기 때문입니다. ​ ...