Editing Anisotropy (section)

===Chemistry===
A chemical anisotropic [[filtration|filter]], as used to filter particles, is a filter with increasingly smaller interstitial spaces in the direction of filtration so that the [[anatomical terms of location#Proximal and distal|proximal]] regions filter out larger particles and [[anatomical terms of location#Proximal and distal|distal]] regions increasingly remove smaller particles, resulting in greater flow-through and more efficient filtration.

In [[fluorescence spectroscopy]], the [[fluorescence anisotropy]], calculated from the [[polarization (physics)|polarization]] properties of fluorescence from samples excited with plane-polarized light, is used, e.g., to determine the shape of a macromolecule. Anisotropy measurements reveal the average angular displacement of the fluorophore that occurs between absorption and subsequent emission of a photon.

In [[nuclear magnetic resonance spectroscopy|NMR spectroscopy]], the orientation of nuclei with respect to the applied [[magnetic field]] determines their [[chemical shift]]. In this context, anisotropic systems refer to the electron distribution of molecules with abnormally high electron density, like the pi system of [[benzene]]. This abnormal electron density affects the applied magnetic field and causes the observed chemical shift to change.