| EPXMA | electron probe x-ray microanalyzer |
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| ERG | electron radiography; electroretinography, electroretinogram |
| ESCA | electron spectroscopy for chemical analysis |
| ESF | electron scatter function; electrosurgical filter; erythropoietic stimulating factor |
| ESR | Einstein stoke radius; electric skin resistance; electron spin resonance; equipment service report; ... |
| transmission electron microscopy | <technique> Those forms of electron microscopy in which electrons are transmitted through the object to be imaged, suffering energy loss by diffraction and to a small extent by absorption. Acronym: TEM (18 Nov 1997) |
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| Environmental Scanning Electron Microscopy | <technique> Scanning electron microscopy is performed by scanning a focused probe across the surface of the sample to be studied. In the environmental scanning electron microscopy the composition and pressure of the atmosphere around the specimen may be controlled. In favourable cases non-conductive specimens may be examined without coating, and hydrated specimens may be examined with the water still in place. Acronym: ESEM (05 Aug 1998) |
| free electron | <radiobiology> An electron not bound to an atom, molecule, or other particle via electromagnetic forces. (09 Oct 1997) |