Stamatis C Boyatzis

Prof. Dr. Stamatis C Boyatzis

University of West Attica, Athens, Greece
orcid

Research Focus & Metrics

Academic Career Length

41Years (1986-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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3 October 2021 in Molecules
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Journal Article
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Anna FilopoulouAnna Filopoulou
Anna Filopoulou
SVSophia Vlachou
Sophia Vlachou
Stamatis C BoyatzisStamatis C Boyatzis
Stamatis C Boyatzis
In a cultural heritage context, fatty acids are usually found as breakdown products of lipid-containing organic remains in archaeological findings, binders in aged oil paintings, and additives in modern art-related materials. They may further interact with the ionic environment transforming into metal soaps, a process that has been recognized as a threat in aged paintings but has received less attention in archaeological objects. The investigation of the above related categories of materials with infrared spectroscopy can provide an overall picture of the organic components’ identity and demonstrate their condition and prehistory. The capability of investigating and distinguishing fatty acids and their metal soaps through their rich infrared features, such as the acidic carbonyl, the carboxylate shifts, the variable splits of alkyl chain stretching, bending, twisting, wagging, and rocking vibrations, as well as the hydroxyl peak envelopes and acid dimer bands, allows for their direct detailed characterization. This paper reviews the infrared spectra of selected saturated fatty monoacids and diacids, and their corresponding sodium, calcium, and zinc salts and, supported by newly recorded data, highlights the significance of their spectroscopic features.

11 May 2016 in Heritage Science
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Stamatis C BoyatzisStamatis C Boyatzis
Stamatis C Boyatzis
GVGeorgia Velivasaki
Georgia Velivasaki
EMEkaterini Malea
Ekaterini Malea
A great number of historic manuscripts, drawings, etc., many of which are stored and/or exhibited in museums, archives and various collections contain iron gall inks (IGIs) as base scripting material. Although the severe deterioration effect of IGIs on paper has been recognized and its chemistry has been explored, little focus has been given on IGIs on parchment. A study was designed to investigate laboratory iron gall inks containing ferrous sulphate and gallic acid (LIG formulation) and with added quantities of gum arabic (LIGG formulation). Specimens marked with the above ink types were artificially aged at 80 °C and 80 % RH for up to 32 days. Micro hot table (MHT) thermal analysis showed a decrease in the shrinkage temperatures in inked areas of aged parchment of up to 15.5 °C. Results of FTIR-ATR spectroscopy showed intense migration of sulphate ions from inked spots to neighbouring ink-free areas at the surface of parchment in both ink formulations, also confirmed by SEM microanalysis results. This effect peaked at short-moderate times of artificial ageing, where calcium sulphate was identified and located at the surface of ink-free areas. Moreover, early signs for gelatinization of collagen also resulted from analysis of Amide I and II infrared bands, where the random coil content increased upon ageing as compared to the helical one.

17 July 1999 in Chemistry of Materials
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EIE. Ioakimoglou
E. Ioakimoglou
Stamatis C BoyatzisStamatis C Boyatzis
Stamatis C Boyatzis
PAPanagiotis Argitis
Panagiotis Argitis
AFA. Fostiridou
A. Fostiridou
KPK. Papapanagiotou
K. Papapanagiotou
NYN. Yannovits
N. Yannovits

14 February 2002 in Journal of Applied Polymer Science
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Stamatis C BoyatzisStamatis C Boyatzis
Stamatis C Boyatzis
EIE. Ioakimoglou
E. Ioakimoglou
PAPanagiotis Argitis
Panagiotis Argitis

26 January 2002 in Chemistry of Materials
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GPG. Pistolis
G. Pistolis
Stamatis C BoyatzisStamatis C Boyatzis
Stamatis C Boyatzis
MCM. Chatzichristidi
M. Chatzichristidi
PAPanagiotis Argitis
Panagiotis Argitis

1 April 1999 in Polyhedron
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Journal Article
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AGAchilleas Garoufis
Achilleas Garoufis
SKSpyridoula Kasselouri
Spyridoula Kasselouri
Stamatis C BoyatzisStamatis C Boyatzis
Stamatis C Boyatzis
Catherine RaptopoulouCatherine Raptopoulou
Catherine Raptopoulou