What Poulsen and co-workers have shown 1 is that the so-called pair-distribution-function approach (PDF) can be used to extract precision strain measurements from amorphous materials even though ...

在哺乳动物脊髓发育进程中，干细胞通过增殖、迁移与分化，孕育出多样的神经细胞，进而构建起复杂精密的神经环路。但成年后，脊髓神经干细胞特性减弱，难以在脊髓损伤后重现发育过程，导致恢复难度大，常使患者终身残疾。长期以来，成年灵长类动物脊髓中是否存有神经干细胞仍然是领域内长久争论的问题，特别是成体脊髓室管膜细胞是否具备干细胞特性仍无定论。

An exanthem is any eruptive skin rash that may be associated with fever or other systemic symptoms. Causes include infectious pathogens, medication reactions and, occasionally, a combination of ...

Many of you will probably at some point have looked at a satellite dish antenna and idly wondered whether it would collect useful amounts of heat if you silvered it and pointed it at the sun.