Identification of colourants in icons of the Cretan School of iconography using Raman spectroscopy and liquid chromatography

The stratigraphies of twenty five (25) samples removed from twenty (20) icons of the Cretan School of iconography are studied using Optical Microscopy and micro-Raman spectroscopy. The objects are dated in 15th–17th c. and belong to the collection of the Benaki Museum, Athens, Greece. Cinnabar, red ochre, minium, yellow ochre, azurite, malachite, lapis lazuli, lead white, carbon black, and indigo are identified in the cross-sections of the icon samples using Raman spectroscopy.     

State Collapse and its Implications for Peace–Building and Reconstruction

At the beginning of the twenty–first century, terms such as state collapse and failed states are becoming familiar, regularly used in international politics to describe a new and frightening challenge to international security. The dramatic events of September 11 have pushed the issue of collapsed states further into the limelight. This article has two aims. Firstly, it explains the contextual factors that gave rise to the phenomenon of state collapse. In the early post–Cold War period, state collapse was usually viewed as a regional phenomenon, and concerns were mainly limited to humanitarian consequences for the local population and destabilizing effects on neighbouring countries. Now, state collapse is seen in a more global context, and concerns are directed at the emergence of groups of non–state actors who are hostile to the fundamental values and interests of the international society such as peace, stability, rule of law, freedom and democracy. Secondly, the article offers some observations about the normative implications of the phenomenon of state collapse for peace–building and reconstruction.     

FTIR imaging and HPLC reveal ancient painting and dyeing techniques of molluskan purple

Fourier transform infrared spectroscopy and imaging coupled to optical microscopy, scanning electron microscopy coupled to energy dispersive x-ray spectroscopy and high-performance liquid chromatography (HPLC) coupled to diode-array detection are used to investigate two samples removed from a painted decoration of a burial kline and a textile fragment, both found in Koru tumulus (fifth century BCE) in Daskyleion. Tyrian purple and kaolinite were identified in both samples, thus suggesting that the aluminosilicate compound had an important role in the applied painting and dyeing processes. The textile fragment is composed of undyed cotton and silk yarns dyed with the molluskan dye. The relative compositions of the molluskan materials used in the two archaeological objects are similar and comparable with the corresponding composition measured for a purple sample originated from Murex trunculus mollusks according to the HPLC results. This result is supported by principal component analysis (PCA) which, furthermore, takes into account the relative compositions of the extracts of the three Mediterranean mollusks, published in previous reports.