Doubly-excited electrons reach new energy states

Positrons are short-lived subatomic particle with the same mass as electrons and a positive charge. They are used in medicine, e.g. in positron emission tomography (PET), a diagnostic imaging method for metabolic disorders. ...

Structure of fossil-fuel source rocks is finally decoded

The fossil fuels that provide much of the world's energy orginate in a type of rock known as kerogen, and the potential for recovering these fuels depends crucially on the size and connectedness of the rocks' internal pore ...

Microscopic chariots deliver molecules within our cells

On the cellular highway, motor proteins called dyneins rule the road. Dyneins "walk" along structures called microtubules to deliver cellular cargo, such as signaling molecules and organelles, to different parts of a cell. ...

Method speeds up time to analyze complex microscopic images

Cryo-electron tomography permits researchers to study in detail the microscopic structures inside of cells. Researchers who typically required a week of effort to dissect the 3-D structure of a single cell will now be able ...

Scientists illuminate structures vital to virus replication

In the fight against the viruses that invade everyday life, seeing and understanding the battleground is essential. Scientists at the Morgridge Institute for Research have, for the first time, imaged molecular structures ...

Research team captures images of pathogens' tiny 'syringes'

Salmonella and many other bacterial pathogens use a nano syringe-like device to deliver toxic proteins into target human cells. Now scientists at Yale and University of Texas Medical School-Houston have used cryo-electron ...

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