Tatjana Bayerova - Academia.edu (original) (raw)
Papers by Tatjana Bayerova
Coatings
Natural aging plays a key role in the degradation of proteinaceous binders which are important di... more Natural aging plays a key role in the degradation of proteinaceous binders which are important dispersers and stabilizers of painting layers. Knowledge about the natural aging influence on the stability of binders is important for exploring the deterioration mechanisms of painted artworks. Pig glue, whole egg, egg white, egg yolk, casein, and mixtures with ultramarine were aged for 10 years in natural conditions. GC-MS and FTIR were applied to explore the changes in the binders at a molecular level. Our experiment revealed that the less stable Met (Methionine), Lys (Lysine), Ile (Isoleucine), Ser (Serine), Asp (Aspartic acid), Glu (Glutamic acid), Hyp (Hydroxyproline), especially aromatic Phe (Phenylalanine), and Tyr (Tyrosine) were damaged, thus the contents of the stable Ala (Alanine), Gly (Glycine), Val (Valine), Leu (Leucine), and Pro (Proline) increased. The broadening of Amide A and the declining amount of α-helix, along with the increasing contents of β-sheet and random coils...
A w idow w ith dierent iew s. he conrvation of he iory w idow s of Sudari C ow k at he ryal place... more A w idow w ith dierent iew s. he conrvation of he iory w idow s of Sudari C ow k at he ryal place in Ptan, N epal Introduction Since 2010, the Institute of Conservation of the University of Applied Arts, Vienna, has been involved in cooperative conservation campaigns in Patan, Nepal. So far there have been nine work missions organised during the summers of each year and they have intensified since 2015, as a reaction to the earthquake in April and May 2015.1 Patan’s Durbar Square and the royal palace complex are UNESCO World Heritage Sites.2 Since 1979, seven monuments and ensembles in the Kathmandu Valley have been registered on the World Heritage List of UNESCO. The ivory window ensemble is located at the royal palace in Patan (figure 1), which is also named Lalitpur the beautiful city.3 The town, which is the oldest in the Kathmandu Valley, is famous for its beauty and for fine crafts like woodcarving and metal casting. These artworks are visible throughout the city, at the palac...
Studies in Conservation, 2014
The Patan Royal Palace is one of the most important examples of representational architecture in ... more The Patan Royal Palace is one of the most important examples of representational architecture in Nepal and an UNESCO World Heritage Site. The Palace complex was constructed in the seventeenth century [1]. The window is positioned above the main entrance to the Sundari Cok and consists of three openings (Fig. 1A). The central window is gilded repousse copper flanked by two embellished and finely carved ivory windows added around 1730. This ensemble, the only one of its kind in the Palace complex, represents a very rare example of the elaborate Nepalese craftsmanship of the time. There were two similar windows in the Kathmandu Valley. The oldest one was located in Bhaktapur but it was destroyed during an earthquake in 1934, and the second one is preserved at the Hanuman Dhoka Palace in Kathmandu [1]. The preservation of the window is important because of its value to the Nepali community, its rarity and its fine craftsmanship. This paper focuses on the examination of the original ivory and the identification of a suitable reconstruction material. Owing to the limited time of one month in autumn 2013 for the conservation work, as well as the shortage of material and technical resources in Nepal, detailed planning of the conservation process needed to be carried out well in advance of the start of the campaign. Only 20–30% of the original ivory is preserved (Fig. 1B). The methodological approach for the 建於十七世紀的帕坦皇宮,是尼泊爾最具代表性的
Von Objekten, Gemälden, Textilien und Steinen, 2010
Studies in Conservation, 2014
The two ‘Chinese Cabinets’ at Schönbrunn Palace, Vienna, Austria, built between 1753 and 1760, ar... more The two ‘Chinese Cabinets’ at Schönbrunn Palace, Vienna, Austria, built between 1753 and 1760, are a significant testimony to European aristocratic taste [1]. Until 2012, 252 objects were exhibited on 303 small gilded consoles on white and gold ornamental wooden frames, into which lacquer panels were set (Fig. 1). There are 213 ceramic vessels (mainly porcelain), 29 porcelain figurines, and 10 lacquer flasks of Japanese, Chinese and European origin. Items owned by Empress Maria Theresa (1717‒1780) form the core of the collection presented on the consoles of these two cabinets. Most objects had holes drilled in their bases and were attached by screws onto the consoles. All items had been fixed at least once by the application of various mounting adhesives. Shellac, gypsum and polyester resin were the three most frequently-used materials. The method that had been used to display and mount the objects posed a high risk due to the instability of the consoles, the wide range of inappropriate previous interventions and inappropriate positioning. As a result, the objects were dismounted in 2012. In the course of an interdisciplinary research project, a system to ensure safe re-installation and mounting is being developed as a basis for the longterm preservation of these objects in the context of the architectural ensemble. In parallel, an assessment of the ambient conditions including stress and risks 奧地利維也納美泉宮內兩組於 1753 至 1760 年間製
Journal of Separation Science, Feb 1, 2004
Direct chemolysis-gas chromatography-mass spectrometry for analysis of paint materials A novel di... more Direct chemolysis-gas chromatography-mass spectrometry for analysis of paint materials A novel direct method using (m-trifluoromethylphenyl)trimethylammonium hydroxide (TFTMAH) has been developed for on-line (trans)esterification of lipidic materials (drying oils, egg) prior to GC-MS analysis. The method was first optimised by comparing three N-methylammonium hydroxide reagents (TMAH, PhTMAH, TFTMAH) and triolein as a lipid standard. Secondly, the procedure was tested on a series of fresh and naturally aged (up to 40 years) (un)pigmented drying oils and egg yolk reference film standards. Thirdly, the method was applied to the analysis of a sample from an altar painting "Resurrection of Christ" by Francesco Solimena (1723) from the Chapel of Upper Belvedere in Vienna. The relative proportions of the fatty acids from the translucent size layer confirm the presence of partially degraded oil, probably prepolymerised walnut oil.
Journal of Inner Asian Art and Archaeology
Lacquerware & Porcelain. Conference 2013 Postprints, 2000
Journal of Separation Science, 2004
Direct chemolysis-gas chromatography-mass spectrometry for analysis of paint materials A novel di... more Direct chemolysis-gas chromatography-mass spectrometry for analysis of paint materials A novel direct method using (m-trifluoromethylphenyl)trimethylammonium hydroxide (TFTMAH) has been developed for on-line (trans)esterification of lipidic materials (drying oils, egg) prior to GC-MS analysis. The method was first optimised by comparing three N-methylammonium hydroxide reagents (TMAH, PhTMAH, TFTMAH) and triolein as a lipid standard. Secondly, the procedure was tested on a series of fresh and naturally aged (up to 40 years) (un)pigmented drying oils and egg yolk reference film standards. Thirdly, the method was applied to the analysis of a sample from an altar painting "Resurrection of Christ" by Francesco Solimena (1723) from the Chapel of Upper Belvedere in Vienna. The relative proportions of the fatty acids from the translucent size layer confirm the presence of partially degraded oil, probably prepolymerised walnut oil.
Studies in Conservation, 2012
ABSTRACT The Imperial Crypt below the Capuchin church in Vienna (the Kapuzinergruft) has been the... more ABSTRACT The Imperial Crypt below the Capuchin church in Vienna (the Kapuzinergruft) has been the principal burial site for the Habsburg dynasty since 1633. Today it holds a world-famous ensemble of sarcophagi and is one of the most important sites in Austria. Due to unfavourable climatic conditions in the crypt, until recently the tin-alloy cast-metal sarcophagi were affected by serious corrosion processes. Several restoration campaigns were undertaken between 1964 and 2002, when many of the sarcophagi were treated with various protective coatings. However, after these interventions a new problem arose: ensuing damage occurred in areas where the protective coatings were applied. Information about the chemical composition of the multi-layered coating systems and their influence on the metal surfaces thus became a crucial area for research. This paper presents the latest results of the technical examination of the surface coatings from three tin-alloy sarcophagi.
Von Objekten, Gemälden, Textilien und Steinen, 2010
Studies in Conservation, 2014
Macromolecular Symposia, 2006
... blood, turpentine, elemi, copaiba balsam waxes: beeswax, carnauba wax, candellila wax gums: a... more ... blood, turpentine, elemi, copaiba balsam waxes: beeswax, carnauba wax, candellila wax gums: arabic gum, tragacanth Sigma-Aldrichà locust bean gum, karaya gum, ghatti gum ... A, 1999, 846, 101 [19] DA Scott, M. Dennis, N. Khandekar, J. Keeney, D. Carson, LS Dodd, Stud. ...
Studies in Conservation, 2014
Coatings
Natural aging plays a key role in the degradation of proteinaceous binders which are important di... more Natural aging plays a key role in the degradation of proteinaceous binders which are important dispersers and stabilizers of painting layers. Knowledge about the natural aging influence on the stability of binders is important for exploring the deterioration mechanisms of painted artworks. Pig glue, whole egg, egg white, egg yolk, casein, and mixtures with ultramarine were aged for 10 years in natural conditions. GC-MS and FTIR were applied to explore the changes in the binders at a molecular level. Our experiment revealed that the less stable Met (Methionine), Lys (Lysine), Ile (Isoleucine), Ser (Serine), Asp (Aspartic acid), Glu (Glutamic acid), Hyp (Hydroxyproline), especially aromatic Phe (Phenylalanine), and Tyr (Tyrosine) were damaged, thus the contents of the stable Ala (Alanine), Gly (Glycine), Val (Valine), Leu (Leucine), and Pro (Proline) increased. The broadening of Amide A and the declining amount of α-helix, along with the increasing contents of β-sheet and random coils...
A w idow w ith dierent iew s. he conrvation of he iory w idow s of Sudari C ow k at he ryal place... more A w idow w ith dierent iew s. he conrvation of he iory w idow s of Sudari C ow k at he ryal place in Ptan, N epal Introduction Since 2010, the Institute of Conservation of the University of Applied Arts, Vienna, has been involved in cooperative conservation campaigns in Patan, Nepal. So far there have been nine work missions organised during the summers of each year and they have intensified since 2015, as a reaction to the earthquake in April and May 2015.1 Patan’s Durbar Square and the royal palace complex are UNESCO World Heritage Sites.2 Since 1979, seven monuments and ensembles in the Kathmandu Valley have been registered on the World Heritage List of UNESCO. The ivory window ensemble is located at the royal palace in Patan (figure 1), which is also named Lalitpur the beautiful city.3 The town, which is the oldest in the Kathmandu Valley, is famous for its beauty and for fine crafts like woodcarving and metal casting. These artworks are visible throughout the city, at the palac...
Studies in Conservation, 2014
The Patan Royal Palace is one of the most important examples of representational architecture in ... more The Patan Royal Palace is one of the most important examples of representational architecture in Nepal and an UNESCO World Heritage Site. The Palace complex was constructed in the seventeenth century [1]. The window is positioned above the main entrance to the Sundari Cok and consists of three openings (Fig. 1A). The central window is gilded repousse copper flanked by two embellished and finely carved ivory windows added around 1730. This ensemble, the only one of its kind in the Palace complex, represents a very rare example of the elaborate Nepalese craftsmanship of the time. There were two similar windows in the Kathmandu Valley. The oldest one was located in Bhaktapur but it was destroyed during an earthquake in 1934, and the second one is preserved at the Hanuman Dhoka Palace in Kathmandu [1]. The preservation of the window is important because of its value to the Nepali community, its rarity and its fine craftsmanship. This paper focuses on the examination of the original ivory and the identification of a suitable reconstruction material. Owing to the limited time of one month in autumn 2013 for the conservation work, as well as the shortage of material and technical resources in Nepal, detailed planning of the conservation process needed to be carried out well in advance of the start of the campaign. Only 20–30% of the original ivory is preserved (Fig. 1B). The methodological approach for the 建於十七世紀的帕坦皇宮,是尼泊爾最具代表性的
Von Objekten, Gemälden, Textilien und Steinen, 2010
Studies in Conservation, 2014
The two ‘Chinese Cabinets’ at Schönbrunn Palace, Vienna, Austria, built between 1753 and 1760, ar... more The two ‘Chinese Cabinets’ at Schönbrunn Palace, Vienna, Austria, built between 1753 and 1760, are a significant testimony to European aristocratic taste [1]. Until 2012, 252 objects were exhibited on 303 small gilded consoles on white and gold ornamental wooden frames, into which lacquer panels were set (Fig. 1). There are 213 ceramic vessels (mainly porcelain), 29 porcelain figurines, and 10 lacquer flasks of Japanese, Chinese and European origin. Items owned by Empress Maria Theresa (1717‒1780) form the core of the collection presented on the consoles of these two cabinets. Most objects had holes drilled in their bases and were attached by screws onto the consoles. All items had been fixed at least once by the application of various mounting adhesives. Shellac, gypsum and polyester resin were the three most frequently-used materials. The method that had been used to display and mount the objects posed a high risk due to the instability of the consoles, the wide range of inappropriate previous interventions and inappropriate positioning. As a result, the objects were dismounted in 2012. In the course of an interdisciplinary research project, a system to ensure safe re-installation and mounting is being developed as a basis for the longterm preservation of these objects in the context of the architectural ensemble. In parallel, an assessment of the ambient conditions including stress and risks 奧地利維也納美泉宮內兩組於 1753 至 1760 年間製
Journal of Separation Science, Feb 1, 2004
Direct chemolysis-gas chromatography-mass spectrometry for analysis of paint materials A novel di... more Direct chemolysis-gas chromatography-mass spectrometry for analysis of paint materials A novel direct method using (m-trifluoromethylphenyl)trimethylammonium hydroxide (TFTMAH) has been developed for on-line (trans)esterification of lipidic materials (drying oils, egg) prior to GC-MS analysis. The method was first optimised by comparing three N-methylammonium hydroxide reagents (TMAH, PhTMAH, TFTMAH) and triolein as a lipid standard. Secondly, the procedure was tested on a series of fresh and naturally aged (up to 40 years) (un)pigmented drying oils and egg yolk reference film standards. Thirdly, the method was applied to the analysis of a sample from an altar painting "Resurrection of Christ" by Francesco Solimena (1723) from the Chapel of Upper Belvedere in Vienna. The relative proportions of the fatty acids from the translucent size layer confirm the presence of partially degraded oil, probably prepolymerised walnut oil.
Journal of Inner Asian Art and Archaeology
Lacquerware & Porcelain. Conference 2013 Postprints, 2000
Journal of Separation Science, 2004
Direct chemolysis-gas chromatography-mass spectrometry for analysis of paint materials A novel di... more Direct chemolysis-gas chromatography-mass spectrometry for analysis of paint materials A novel direct method using (m-trifluoromethylphenyl)trimethylammonium hydroxide (TFTMAH) has been developed for on-line (trans)esterification of lipidic materials (drying oils, egg) prior to GC-MS analysis. The method was first optimised by comparing three N-methylammonium hydroxide reagents (TMAH, PhTMAH, TFTMAH) and triolein as a lipid standard. Secondly, the procedure was tested on a series of fresh and naturally aged (up to 40 years) (un)pigmented drying oils and egg yolk reference film standards. Thirdly, the method was applied to the analysis of a sample from an altar painting "Resurrection of Christ" by Francesco Solimena (1723) from the Chapel of Upper Belvedere in Vienna. The relative proportions of the fatty acids from the translucent size layer confirm the presence of partially degraded oil, probably prepolymerised walnut oil.
Studies in Conservation, 2012
ABSTRACT The Imperial Crypt below the Capuchin church in Vienna (the Kapuzinergruft) has been the... more ABSTRACT The Imperial Crypt below the Capuchin church in Vienna (the Kapuzinergruft) has been the principal burial site for the Habsburg dynasty since 1633. Today it holds a world-famous ensemble of sarcophagi and is one of the most important sites in Austria. Due to unfavourable climatic conditions in the crypt, until recently the tin-alloy cast-metal sarcophagi were affected by serious corrosion processes. Several restoration campaigns were undertaken between 1964 and 2002, when many of the sarcophagi were treated with various protective coatings. However, after these interventions a new problem arose: ensuing damage occurred in areas where the protective coatings were applied. Information about the chemical composition of the multi-layered coating systems and their influence on the metal surfaces thus became a crucial area for research. This paper presents the latest results of the technical examination of the surface coatings from three tin-alloy sarcophagi.
Von Objekten, Gemälden, Textilien und Steinen, 2010
Studies in Conservation, 2014
Macromolecular Symposia, 2006
... blood, turpentine, elemi, copaiba balsam waxes: beeswax, carnauba wax, candellila wax gums: a... more ... blood, turpentine, elemi, copaiba balsam waxes: beeswax, carnauba wax, candellila wax gums: arabic gum, tragacanth Sigma-Aldrichà locust bean gum, karaya gum, ghatti gum ... A, 1999, 846, 101 [19] DA Scott, M. Dennis, N. Khandekar, J. Keeney, D. Carson, LS Dodd, Stud. ...
Studies in Conservation, 2014