Electron acceptors participate in electron-transfer reactions. These proteins relay electrons by the process called electron transfer. High resolution AFM is comparable in resolution to scanning tunneling microscopy and transmission electron microscopy. It can be used as a stain in scanning electron microscopy. Acrolein is sometimes used as a fixative in preparation of biological specimens for electron microscopy. It is paramagnetic with one unpaired electron per molecule. Perichromatin fibrils are visible only under electron microscope. Another difficulty was the difference in masses of the electron and the proton. This proceeds via single electron oxidation and hydroxyl radicals. This energy is carried away as kinetic energy by the electron and neutrino. Effects related to electron irradiation degradation are therefore more pronounced. This leads to the number of magnetic moments decreasing as they depend on electron spins. The force results from a transient shift in electron density. Metals are usually inclined to form cations through electron loss. Prokaryotes can utilize a variety of electron acceptors.