English to Spanish translations [PRO] Tech/Engineering - Materials (Plastics, Ceramics, etc.) / técnicas de análisis - materiales envejecidos | | English term or phrase: aging pathways | | For a complete understanding of the composition of paint layers, several techniques need to be used. The coupling of gas chromatography with mass spectrometry (GC/MS) is the preferred analytical approach to characterize organic paint materials. The versatility of GC in the investigation of a very broad set of natural organic materials that can be found in artwork was pioneered by Mills and White1 and confirmed by a number of successful applications and case studies. The choice of GC is driven by the fact that natural organic substances are complex mixtures of many chemical species that are very similar to each other; the resolution and determination of the molecular profile is essential in order to identify the materials present and the aging pathways. Consequently, in this specific field, the coupling of GC with mass spectrometry is necessary due to the high number of compounds with similar retention times. In addition, because the most significant compounds are not available as commercial standards, identification cannot be based only on retention times and requires the confirmation by mass spectra. |
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Toni Romero Spain Local time: 17:47
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| Reference: patrones de envejecimiento
Reference information: De la referencia 1:"It was found to be particularly strong when
photoaged varnishes were subsequently thermally aged [18].
Van der Doelen et al. focused mainly on the study of naturally
aged dammar and mastic varnishes from paintings and followed
their degradation by identification of individual oxidation
products on a molecular level [21e24]. She identified
differences in aging pathways under natural and artificial
aging conditions." De acuerdo a esa información interpreto que materiales similares expuestos a agentes causantes de envejecimiento, sufren un determinado proceso de envecimiento. Materiales diferentes, expuestos a los mismos agentes, sufren un proceso de envejecimiento diferente. O sea que para cada composición molecular existe un patrón diferente de envejecimiento. Del mismo modo, materiales de similar composición pueden tener un patron de envejecimiento diferente, según sean sometidos a un proceso natural o a uno artifical de envejecimiento.
Reference: http://andbeyond.ch/Dissertation/Publications/J_Cult_Herit_2... Reference: http://books.google.com.uy/books?id=VIiJtTCgDyUC&pg=PA588&lp...
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| May 24, 2011 - Changes made by Toni Romero: | | Created KOG entry | KudoZ term => KOG term |
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