A5029640951- Cultural Heritage Materials Analysis
- Building materials and conservation
- Conservation Techniques and Studies
- X-ray Diffraction in Crystallography
- Natural product bioactivities and synthesis
- Crystal Structures and Properties
- Chemical Synthesis and Characterization
- Sesquiterpenes and Asteraceae Studies
- Zeolite Catalysis and Synthesis
- Archaeology and ancient environmental studies
- Plant biochemistry and biosynthesis
- Synthesis and Biological Evaluation
- Biological Activity of Diterpenoids and Biflavonoids
- Crystal structures of chemical compounds
- Traditional and Medicinal Uses of Annonaceae
- Synthesis and Reactions of Organic Compounds
- Ancient Mediterranean Archaeology and History
- Geology and Paleoclimatology Research
- Synthesis of Organic Compounds
- Synthesis and Characterization of Heterocyclic Compounds
- Clay minerals and soil interactions
- Analytical Chemistry and Chromatography
- High-pressure geophysics and materials
- Phytochemistry and Biological Activities
- Mineralogy and Gemology Studies
Getty Conservation Institute
2008-2024
Environment Park
2019-2022
University of Turin
1995-2009
J. Paul Getty Museum
2004-2005
University of Southern California
2005
University of Otago
1996
Oak Ridge National Laboratory
1996
Louisiana State University
1990
Vassar College
1987
Flinders University
1987
A survey of the geometry and environment water molecules in crystalline hydrates is presented. Histograms correlation analyses are based on 97 crystal structures accurately determined by neutron diffraction, include data from 183 molecules, each donating two hydrogen bonds. The sample analyzed according to nature hydrogen-bond acceptors coordinated cations. Cases bifurcated bonds also discussed. tend be linear located close plane. tendency coordination collinear with direction one lone pairs...
Diagnostic immunology is a powerful tool, widely used in clinical and biochemical laboratories for detecting molecules. In recent years, the technique has been adaptated to materials sciences as result of extensive advances achieved immunology. Today, many companies supply custom antibodies well new high-performance bioprobes virtually any use. The idea using immunodetection field conservation science not new. This analytical methodology is, fact, particularly attractive investigating...
Li−LSX (Li−faujasite with Si/Al = 1), cubic at room temperature, is orthorhombic (Fddd) 10 K. In the room-temperature Fd3̄ phase, Li cations in supercage are evenly distributed between 2-fold-coordinated sites III and III', close agreement cation distribution Na−X. The cubic−orthorhombic phase transition implies extensive redistribution of strain through lattice displacement cations. low-temperature Fddd occupancy II reduced, nearly half supercage, most them a new site midway neighboring II.
Unvarnished twentieth-century oil paintings are often sensitive to aqueous swabbing, a method routinely employed by conservators for surface cleaning. This study proposes connection between sensitivity and the presence of magnesium sulphate heptahydrate which has been identified on some water-sensitive paintings. The probable source is carbonate, an additive in paints, reacted with atmospheric sulphur dioxide (SO2). Films made using modern manufactured paints formulations laboratory were...
This paper reports on the comparative evaluation of traditional and innovative methods for investigation mortar technology. Preliminary results various approaches to determining mix proportions in lime mortars with carbonate aggregate are presented. Quantitative analysis was tested ad hoc prepared known composition containing aggregates different origin (travertine Bath limestone). Wet chemical methods, manual disaggregation Digital Image Analysis thin sections cross‐sections stained...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPalladium(II) complexes with trans bis-(carbon-metal) bonds. Ligand syntheses, complexation, x-ray analysis, and biochemical activity supercoiled DNAGeorge R. Newkome, Toshio Kawato, Dalip K. Kohli, Wallace E. Puckett, Brian D. Olivier, Giacomo Chiari, Frank Fronczek, Walter A. DeutschCite this: J. Am. Chem. Soc. 1981, 103, 12, 3423–3429Publication Date (Print):June 1, 1981Publication History Published online1 May 2002Published inissue 1 June...
Etude de la coordination autour du cation Ca pour 254 composes mineraux, contenant au total 368 polyedres, en effectuant une selection sur base precision des donnees structurales. Analyse statistique fonction variables liees aux distances Co-O et volume polyedre concerne. Proposition d'une equation permettant d'attribuer un nombre dans les cas ambigus
Samples of red and black gloss from Greek Attic pottery the late sixth to fifth centuries bc were examined using scanning electron microscopy (SEM FIB/STEM). The focus study was chemical microstructural characterization that first produced during this period. Two groupings revealed. One found be compositionally similar glosses (labelled ‘LCM coral red’). other showed more significant differences, such as higher calcium magnesium, in comparison ‘HCM existence two chemically distinct...