Recherche
Résultats de recherche
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Journal article
Saving our polyesterdays: historical plastics research
Preventing the degradation of materials in museums has always been a challenge. Now plastics in 20th century museum artefacts are presenting a new set of problems.Quye, Anita
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Journal article
Negative ion electrospray mass spectrometry of neoflavonoids
The electrospray ionisation mass spectra of the neoflavanoids brazilin and hematoxylin are reported in both their reduced (1 and 2, respectively) and their oxidised forms (3 and 4, respectively). In the reduced forms, breakdown pathways under collision induced decomposition (CID) conditions produce fragments characteristic of rings A and C; in...Hulme, Alison N ; McNab, Hamish ; Peggie, David A ; Quye, Anita
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Journal article
2',4',6'-Trihydroxy-1-methoxyacetophenone monohydrate at 150 K
The geometry of the title compound, 2-methoxy-1-(2,4,6-trihydroxyphenyl)ethanone, C9H10O5·H2O, is determined by the presence of an intramolecular hydrogen bond; the geometry of the benzene ring is distorted by a flanking carbonyl group.Ferreira, Ester S B ; Hulme, Alison N ; McNab, Hamish ; Quye, Anita ; Parsons, S
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Journal article
Raman spectroscopy of coloured resins used in antiquity: dragon's blood and related substances
Dragon's blood is a deep red resin which has been used for centuries by many cultures and much prized for it's rarity, depth of colour and alchemical associations. The original source of dragon's blood resin is believed to be Dracaena cinnabari from Socotra in Africa, but since mediaeval times there...Edwards, Howell G M ; de Oliviera, Luiz Fernando C ; Quye, Anita
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Journal article
‘Dragon’s Blood’ I—characterization of an Ancient resin using Fourier transform Raman spectroscopy
Several resins generically known as ‘dragon’s blood’ from different botanical and geographical sources were characterised non‐destructively using Fourier transform Raman spectroscopy. Genuine ‘dragon’s blood’ resin (Dracaena spp.) as found on Socotra Island was the probable source in antiquity. The spectra of recently collected Socotran resins from different sites were compared...Quye, Anita ; Edwards, Howell G M ; Farwell, D W
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Quye, Anita
lac, analysis, liquid chromatography, dyes, madder, Cochineal, and kermes
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Book chapter
The analytical characterisation of flavonoid photodegradation products: a novel approach to identifying natural yellow dyes in ancient textiles
In a previous study new compounds were detected from light aged natural yellow (flavonoid) dyes on alum mordanted wool. We have now developed a novel technique - negative ion electrospray ionisation quadrupole ion trap tandem mass spectrometry (ESI QIT MS) - for futher study and identification of characteristic flavonoid photodegradation... -
Book chapter
A preliminary study of light-ageing effects on the analysis of natural flavonoid-dyed wools by PDA HPLC and by DTMS
Initial results from high performance liquid chromatographic (HPLC) analysis of accelerated fluorescent tube- and mercury-incandescent lamp-aged mordanted wools dyed with old fustic, weld, quercitron bark, quercetin, dyer's greenweed and onion skins indicate that additional chromophoric and non-chromophoric compounds are generated upon photodegredation. Greater amounts of these componenets were generated after... -
Book chapter
The analytical characterisation of the main component found in logwood dyed textile samples after hydrochloric acid extraction
The triennial meetings of the ICOM Committee for Conservation (ICOM-CC) are widely regarded as the most significant global events in the heritage conservation calendar. At each Congress, the membership of the ICOM-CC are brought together to report and to review current research. The meetings offer the conservation professional a unique...Hulme, Alison N ; McNab, Hamish ; Peggie, David A ; Quye, Anita ; Vanden Berghe, I …
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Book chapter
The application of liquid chromatography–mass spectrometry and accelerated light ageing for the analytical identification of yellow flavonoid dyes in historical tapestries
Papers in this volume cover various aspects of the deterioration of textiles and the different scientific techniques that can be applied to investigate the characteristics of historic textiles, their fibres, dyes etc. The authors include textile, paper and painting conservators, conservation scientists, chemists, archaeologists, engineers, biochemists and a zoologist. This...Hulme, Alison N ; McNab, Hamish ; Quye, Anita ; Peggie, David A