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Your search keyword '"Madariaga, Juan Manuel"' showing total 10 results
Start Over Author "Madariaga, Juan Manuel" Journal analytical chemistry
10 results on '"Madariaga, Juan Manuel"'

1. When Red Turns Black: Influence of the 79 AD Volcanic Eruption and Burial Environment on the Blackening/Darkening of Pompeian Cinnabar

Author

Pérez-Diez, Silvia, primary, Pitarch Martí, Africa, additional, Giakoumaki, Anastasia, additional, Prieto-Taboada, Nagore, additional, Fdez-Ortiz de Vallejuelo, Silvia, additional, Martellone, Alberta, additional, De Nigris, Bruno, additional, Osanna, Massimo, additional, Madariaga, Juan Manuel, additional, and Maguregui, Maite, additional

Published
2021
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2. Green copper pigments biodegradation in cultural heritage: from malachite to moolooite, thermodynamic modeling, x-ray fluorescence, and Raman evidence

Author

Castro, Kepa, Sarmiento, Alfredo, Martinez-Arkarazo, Irantzu, Madariaga, Juan Manuel, and Fernandez, Luis Angel

Subjects
Fluorescence -- Properties, Thermodynamics -- Research, Pigments -- Properties, Biodegradation -- Research, Raman effect -- Research, Chemistry
Abstract

Moolooite (copper oxalate), a very rare compound, was found as a degradation product from the decay of malachite in several specimens of Cultural Heritage studied. Computer simulations, based on heterogeneous chemical equilibria, support the transformation of malachite to moolooite through the intermediate copper basic sulfates or copper basic chlorides, depending on the presence of available free sulfate or chloride anions in the chemical system. Raman and X-ray fluorescence spectral evidence found during the analysis of the three case studies investigated supported the model predictions. According to the study, the presence of lichens and other microorganisms might be responsible for the decay phenomena. This work tries to highlight the importance of biological attack on specimens belonging to Cultural Heritage and to demonstrate the consequences of oxalic acid, excreted by some of these microorganisms, on the conservation and preservation of artwork.

Published
2008

5. Multispectroscopic and Isotopic Ratio Analysis To Characterize the Inorganic Binder Used on Pompeian Pink and Purple Lake Pigments

Author

Marcaida, Iker, primary, Maguregui, Maite, additional, Morillas, Héctor, additional, García-Florentino, Cristina, additional, Knuutinen, Ulla, additional, Carrero, Jose Antonio, additional, Fdez-Ortiz de Vallejuelo, Silvia, additional, Pitarch Martı́, Africa, additional, Castro, Kepa, additional, and Madariaga, Juan Manuel, additional

Published
2016
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9. FTIR Spectra Database.

Author

Castro, Kepa, Pérez, Maite, Rodríguez-Laso, Maria Dolores, and Madariaga, Juan Manuel

Subjects
*FOURIER transform infrared spectroscopy, *ONLINE databases, *ANALYTICAL chemistry
Abstract

Discusses the relevance of online database containing Fourier transform infrared spectra of pigments and artists' materials, which is called e-vibrational spectroscopic database of artist's materials (e-VISART). Features of e-VISART database; Analysis of spectra database.

Published
2003
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