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Descriptor English: Microscopy, Energy-Filtering Transmission Electron
Descriptor Spanish: Energía Filtrada en la Transmisión por Microscopía Electrónica
Descriptor microscopia electrónica de transmisión por filtración de energía
Entry term(s) microscopia electrónica de transmisión por pérdida de energía
Scope note: Método de microscopia electrónica de transmisión analítica, en la que se usa un microscopio electrónico equipado con una lente de filtración de energía. El método se basa en el principio de que algunos ELECTRONES que pasan a través de la muestra pierden energía cuando ionizan la capa interna de electrones de los átomos de la muestra. La cuantía de la pérdida de energía depende del elemento. El análisis del espectro de la pérdida de energía (ESPECTROSCOPIA DE PÉRDIDA DE ENERGÍA DE LOS ELECTRONES) revela la composición elemental de la muestra. Se utiliza analítica y cuantitativamente para determinar cuales, en qué cuantía y dónde están los ELEMENTOS específicos de una muestra. Por ejemplo, se usa para la cartografía elemental del FÓSFORO para rastrear las cadenas de ÁCIDOS NUCLEICOS en complejos nucleoproteicos.
Descriptor Portuguese: Microscopia Eletrônica de Transmissão por Filtração de Energia
Descriptor French: Microscopie électronique en transmission filtrée en énergie
Entry term(s): EF-TEM
EFTEM
Electron Spectroscopic Imaging
Energy Filtered TEM
Energy Filtered Transmission Electron Microscopy
Energy Filtering Transmission Electron Microscopy
Energy-Filtered TEM
Energy-Filtered Transmission Electron Microscopy
Energy-Filtering Transmission Electron Microscopy
Imaging, Electron Spectroscopic
Microscopy, Energy Filtering Transmission Electron
Spectroscopic Imaging, Electron
TEM, Energy-Filtered
Tree number(s): E01.370.350.515.402.580.500
E05.196.867.838.500
E05.595.402.580.500
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D046032
Scope note: An analytical transmission electron microscopy method using an electron microscope fitted with an energy filtering lens. The method is based on the principle that some of the ELECTRONS passing through the specimen will lose energy when they ionize inner shell electrons of the atoms in the specimen. The amount of energy loss is dependent upon the element. Analysis of the energy loss spectrum (ELECTRON ENERGY-LOSS SPECTROSCOPY) reveals the elemental composition of a specimen. It is used analytically and quantitatively to determine which, how much of, and where specific ELEMENTS are in a sample. For example, it is used for elemental mapping of PHOSPHORUS to trace the strands of NUCLEIC ACIDS in nucleoprotein complexes.
Allowable Qualifiers: CL classification
EC economics
ES ethics
HI history
IS instrumentation
MT methods
SN statistics & numerical data
ST standards
TD trends
VE veterinary
Previous Indexing: Microscopy, Electron (1993-2004)
Public MeSH Note: 2005
History Note: 2005
DeCS ID: 38798
Unique ID: D046032
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 2005/01/01
Date of Entry: 2004/07/07
Revision Date: 2005/07/21
Microscopy, Energy-Filtering Transmission Electron - Preferred
Concept UI M0452473
Scope note An analytical transmission electron microscopy method using an electron microscope fitted with an energy filtering lens. The method is based on the principle that some of the ELECTRONS passing through the specimen will lose energy when they ionize inner shell electrons of the atoms in the specimen. The amount of energy loss is dependent upon the element. Analysis of the energy loss spectrum (ELECTRON ENERGY-LOSS SPECTROSCOPY) reveals the elemental composition of a specimen. It is used analytically and quantitatively to determine which, how much of, and where specific ELEMENTS are in a sample. For example, it is used for elemental mapping of PHOSPHORUS to trace the strands of NUCLEIC ACIDS in nucleoprotein complexes.
Preferred term Microscopy, Energy-Filtering Transmission Electron
Entry term(s) EF-TEM
EFTEM
Electron Spectroscopic Imaging
Energy Filtered TEM
Energy Filtered Transmission Electron Microscopy
Energy Filtering Transmission Electron Microscopy
Energy-Filtered TEM
Energy-Filtered Transmission Electron Microscopy
Energy-Filtering Transmission Electron Microscopy
Imaging, Electron Spectroscopic
Microscopy, Energy Filtering Transmission Electron
Spectroscopic Imaging, Electron
TEM, Energy-Filtered



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