Some scientists believe that crystal structure and impurities are central to whether a material becomes triboluminescent. |
The substitute eliminates the problem of donated blood being tainted by infections or impurities. |
Other separators can extract impurities from lubricating oils, beer and wine, and numerous other substances. |
The term fluxing also includes the treatment of nonferrous melts by inert or reactive gases to remove solid or gaseous impurities. |
The earliest soft magnetic material was iron, which contained many impurities. |
In American colonial times, sugar was not as refined as nowadays and contained impurities. |