The emission of secondary (or fluorescent) X-rays from a material that has been excited by bombarding it with X-rays. The process can be used to determine the chemistry, and therefore the identity, of an unknown metal. This is a nondestructive test method.
Still Building America—Pablo Guerrero’s art and ancestry - by Josh Welton Starting your own business isn’t for the faint of heart. It helps if you are inspired by an ancestor who did the same. Here’s the story of how Pablo Guerrero made his own mark while honoring his grandfather.
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