A5012095046- Cultural Heritage Materials Analysis
- Conservation Techniques and Studies
- Building materials and conservation
- Archaeology and ancient environmental studies
- Phytochemicals and Antioxidant Activities
- Nuclear Physics and Applications
- Photochemistry and Electron Transfer Studies
- Advanced X-ray Imaging Techniques
- Tea Polyphenols and Effects
- Analytical chemistry methods development
- Hip and Femur Fractures
- X-ray Spectroscopy and Fluorescence Analysis
- Free Radicals and Antioxidants
- Porphyrin and Phthalocyanine Chemistry
- Photopolymerization techniques and applications
- Nanocomposite Films for Food Packaging
- Corrosion Behavior and Inhibition
- Advanced Cellulose Research Studies
- Additive Manufacturing and 3D Printing Technologies
- Flowering Plant Growth and Cultivation
- Biochemical Analysis and Sensing Techniques
- Hernia repair and management
- Crystallization and Solubility Studies
- Dyeing and Modifying Textile Fibers
- Ion-surface interactions and analysis
TH Köln - University of Applied Sciences
2016-2024
Universidade Federal de Campina Grande
2024
Hospital de São João
2023
Swiss Institute for Art Research
2009-2016
University of Edinburgh
2001-2008
National Museums Scotland
2008
Institute for Atomic and Molecular Physics
2005-2008
Universidade Nova de Lisboa
1996
University of Bologna
1996
ABSTRACT Lead white is a man-made pigment commonly used in works of art. In this study, the possibility radiocarbon dating lead pigments alone and oil paints was explored using well-dated paints. Resulting 14 C ages on produced following traditional stack process, where carbonate groups results from incorporation CO 2 originating fermentation, matched production years, while made other industrial processes indicate that depleted their production. The method applied to two case studies,...
Significance Can radiocarbon ( 14 C) dating uncover modern forgeries? Radiocarbon has the potential to answer question of when an artwork was created, by providing a time frame material used. In this study we show that with two microsamples (<500 μg), from both canvas and paint layer itself, forgery could be identified. The is consistent purported attribution 19th century; however, C age gained on contradicts as it offers clear evidence for post-1950 creation. Thus additional reveals...
The energy- and electron-transfer quenching processes of the lowest triplet excited state biacetyl (2,3-butanedione) imprisoned in a hemicarcerand have been systematically investigated CH2Cl2 solution at room temperature. Twenty potential quenchers used, including ten energy acceptors (mostly, aromatic hydrocarbons) nine electron donors amines). Bimolecular rate constants for were obtained by Stern−Volmer analysis compared with those found free biacetyl. In processes, amines oxidation from...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSupramolecular photochemistry and photophysics. Biacetyl imprisoned in a hemicarcerandFernando Pina, A. Jorge Parola, Ester Ferreira, Mauro Maestri, Nicola Armaroli, Roberto Ballardini, Vincenzo BalzaniCite this: J. Phys. Chem. 1995, 99, 34, 12701–12703Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August...
Abstract The use of accelerator mass spectrometry (AMS) for age determinations paintings is growing due to decreasing sample size requirements. However, as only the support material usually dated, validity results may be questioned. This work describes a novel sampling and preparation technique dating natural organic binder using radiocarbon ( 14 C) AMS. In particular case oil paintings, used has high probability being representative time creation, hereby circumventing problem originality...
Moisture is a driving factor in the long-term mechanical deterioration of canvas paintings, as well for number physico–chemical degradation processes. Since 1990s publications have addressed equilibrium hygroscopic uptake and hygro-mechanical deformation linen canvas, oil paint, animal glue, ground paint. In order to visualise quantify dynamic behaviour these materials combined painting mock-up or reconstruction, we performed custom-designed experiments with neutron radiography nuclear...
Abstract For see ChemInform in Full Text.
Lead white is known as one of the oldest pigments in art and can be used a dating material. Upon production following Stack process, 14C isotope atmospheric carbon dioxide fixed carbonate, its radiocarbon proxy for age painting. The previously reported carbonate hydrolysis protocol reaches limitation when confronted with samples presenting mixture carbonates, such lead (cerussite or hydrocerussite), calcium (calcite), and/or magnesium (dolomite). Thermogravimetric analyses indicate that...
During the examination of two 19th century oil paintings by Swiss artists, Reading pastor (ca. 1885) Ferdinand Hodler (1853–1918) and Portrait a young girl 1888) Filippo Franzoni (1857–1911), it was observed that in particular locations, surface had an unusually granular texture, given application metallic particles presence large translucent green agglomerates. In this paper we investigate composition origin metal A combination bulk analysis (GC–MS FTIR) analytical microscopy techniques...
Synchrotron based X-ray microtomography is a novel way to examine paint samples.The three dimensional distribution of pigment particles, binding media and their deterioration products as well other features such voids, are made visible in original context through computing environment without the need physical sectioning.This avoids manipulation related artefacts.Experiments on chips (approximately 500 micron wide) were done TOMCAT beam line (TOmographic Microscopy Coherent rAdiology...
Abstract A specific case of degradation was observed in synthetic ultramarine paint within 3 paintings from the early 20th century, manifesting as an intricate pattern white lines criss‐crossing blue surface. Raman spectroscopy can be performed directly on untreated sample surfaces and is sensitive to colour components (S − S 2 chromophores). This method chosen map chromophore intensity distribution relate it surface pattern. signal intensity, however, decreases when laser out focus,...
Extract HTML view is not available for this content. However, as you have access to content, a full PDF via the 'Save PDF' action button. Extended abstract of paper presented at Microscopy and Microanalysis 2005 in Honolulu, Hawaii, USA, July 31--August 4,