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Descriptor English: Photobleaching
Descriptor Spanish: Fotoblanqueo
Descriptor fotoblanqueo
Scope note: Cambios inducidos por la luz en un cromóforo, que se traducen en la pérdida de su capacidad para absorber la luz de una determinada longitud de onda. La energía fotónica provoca un cambio estructural en las proteínas fotorreceptoras, lo que afecta a la FOTOTRANSDUCCIÓN. Este fenómeno se realiza, de forma natural, en la retina (ADAPTACIÓN OCULAR) tras una exposición larga a una luz brillante. El fotoblanqueo presenta problemas cuando se produce en TERAPIA FOTODINÁMICA y en MICROSCOPÍA DE FLUORESCENCIA. Por otro lado, este fenómeno tiene aplicación técnica, la RECUPERACIÓN DE FLUORESCENCIA TRAS FOTOBLANQUEO, lo que permite medir los movimientos de proteínas y LÍPIDOS en la MEMBRANA CELULAR.
Descriptor Portuguese: Fotodegradação
Descriptor French: Photoblanchiment
Tree number(s): G02.740.680
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D038761
Scope note: Light-induced change in a chromophore, resulting in the loss of its absorption of light of a particular wave length. The photon energy causes a conformational change in the photoreceptor proteins affecting PHOTOTRANSDUCTION. This occurs naturally in the retina (ADAPTATION, OCULAR) on long exposure to bright light. Photobleaching presents problems when occurring in PHOTODYNAMIC THERAPY, and in FLUORESCENCE MICROSCOPY. On the other hand, this phenomenon is exploited in the technique, FLUORESCENCE RECOVERY AFTER PHOTOBLEACHING, allowing measurement of the movements of proteins and LIPIDS in the CELL MEMBRANE.
Allowable Qualifiers: DE drug effects
RE radiation effects
Previous Indexing: Photochemistry (1972-2002)
Public MeSH Note: 2003
History Note: 2003
DeCS ID: 37671
Unique ID: D038761
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 2003/01/01
Date of Entry: 2002/07/03
Revision Date: 2016/06/17
Photobleaching - Preferred
Concept UI M0416992
Scope note Light-induced change in a chromophore, resulting in the loss of its absorption of light of a particular wave length. The photon energy causes a conformational change in the photoreceptor proteins affecting PHOTOTRANSDUCTION. This occurs naturally in the retina (ADAPTATION, OCULAR) on long exposure to bright light. Photobleaching presents problems when occurring in PHOTODYNAMIC THERAPY, and in FLUORESCENCE MICROSCOPY. On the other hand, this phenomenon is exploited in the technique, FLUORESCENCE RECOVERY AFTER PHOTOBLEACHING, allowing measurement of the movements of proteins and LIPIDS in the CELL MEMBRANE.
Preferred term Photobleaching



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