附两例病例: A. Axial T1-weighted sequence in a 53-year-old woman with a 3-month history of confusion demonstrates a a well-circumscribed,lobulated mass located in the frontal and parietal lobe, to be isointense to gray matter...
When Dame Jocelyn Bell Burnell discovered the first pulsar 51 years ago, she revealed a new tool for solving many mysteries of the cosmos.
Pete and John both attended Acton County Grammar School where another, slightly older, pupil Roger Daltrey had a group called The Detours. Roger invited John to join and about six months later the nucleus of The Who was in place when John persuaded Roger that Pete should join too. Meanwhile...
Who created the Bohr model? Essentials of the Bohr Model: The Bohr model describes the structure of an atom. It states that the nucleus is a small positive core and is surrounded by a cloud of electrons arranged in discrete energy levels. Prior to this model, it was thought that electrons...
The researchers analyzed data from 45 elderly people and found that people with fewer neurons in the "sleep switch" area were more probably to have sleepless nights."The fewer the neurons are, the more broken the sleep becomes. These findings show that the ventrolateral preoptic nucleus in ...
proteases, enzymes that break down proteins into their building blocks—amino acids. The proteases didn’t affect the precipitate, further cementing his view that this was not a protein. He also knew, based on previous work, that the substance was found in the nucleus, so he named it nuclei...
Increasing evidence suggests that a cross-talk mechanism between mitochondria and the nucleus is closely related to neuronal function and activity. Nuclear receptors (estrogen receptors, thyroid (T3) hormone receptor, peroxisome proliferators-activated receptor gamma2) and transcription factors (cAMP ...
Once the HIF-α form is stabilized in the cytoplasm, it binds to HIF-1β, which translocates the HIF heterodimer into the nucleus, where it binds to the hypoxia-responsive element (HRE) of the downstream target genes10 (Fig. 1). Although HIF-1 and HIF-2 share a number of common downs...
A friendship like theirs, which has spanned nearly their entire adulthood and functioned as the nucleus of their support system, raises a fundamental question about how we recognize relationships: On what basis do we decide that a partnership is “real”? It’s a question the journalist Rebecca...
Now you’ve found the Majorana, what’s next? Usually, if you exchange two particles, their quantum state changes by 1 or -1. If you change it once more, it goes back to the same old state. In contrast, the Majoranas have different phase factors, so you only go back to your...