Electron transfer is a process by which an electron moves from one atom or molecule to another. It is a key concept in redox chemistry – the chemistry of reactions where one reaction partner ...

Positron-emission tomography (PET) is a technique for imaging the metabolic activity of internal tissues in three dimensions based on biologically active tracer compounds conjugated to positron ...

PET is a functional neuroimaging tool. In recent years, it has been used to determine the distribution of important neurotransmitters in the human brain. Compared with other functional imaging ...