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Université de Fribourg

Unexpected presence of 14C in inorganic pigment for an absolute dating of paintings

Beck, Lucile ; Messager, Cyrielle ; Caffy, Ingrid ; Delqué-Količ, Emmanuelle ; Perron, Marion ; Dumoulin, Jean-Pascal ; Moreau, Christophe ; Degrigny, Christian ; Serneels, Vincent

In: Scientific Reports, 2020, vol. 10, no. 1, p. 9582

The absolute dating of paintings is crucial for tackling the problem of fake art. Investigations to authenticate paintings rely on an advanced knowledge of art history and a collection of scientific techniques. Radiocarbon dating is the only technique that gives access to an absolute time scale, but its application is limited to organic materials such as wood, canvas or natural binder....

Haute Ecole Arc Conservation-Restauration

Sublimation von Cyclododecan

Bruhin, Stefanie

Mémoire de diplôme HES : Haute Ecole Arc Conservation-Restauration, 2008.

The diploma thesis treats the volatile binding media cyclododecane and its use in conservation- restoration. The dissertation is based on preceding research and specifically treats the most characteristic property of the product: its ability to sublime. Cyclododecane is an industrial product, which was introduced in conservation-restoration in the middle of the nineteen nineties. This was due to...

Université de Fribourg

Directional changes of the geomagnetic field in West Africa: Insights from the metallurgical site of Korsimoro

Donadini, Fabio ; Serneels, Vincent ; Kapper, Lisa ; El Kateb, Akram

In: Earth and Planetary Science Letters, 2015, vol. 430, p. 349–355

This work shows the first archeomagnetic directions from Western Africa measured on 32 iron smelting kilns dated between 650 and 1800 AD. The archeological excavation of the vast metallurgical site of Korsimoro established the existence of four distinct iron-smelting techniques. The time-frame of each technique could be clearly determined with radiocarbon dating. Many of the kilns investigated in...

Université de Fribourg

GEOMAGIA50.v3: 1. general structure and modifications to the archeological and volcanic database

Brown, Maxwell C ; Donadini, Fabio ; Korte, Monika ; Nilsson, Andreas ; Korhonen, Kimmo ; Lodge, Alexandra ; Lengyel, Stacey N ; Constable, Catherine G

In: Earth, Planets and Space, 2015, vol. 67, no. 1, p. 83

Background: GEOMAGIA50.v3 is a comprehensive online database providing access to published paleomagnetic, rock magnetic, and chronological data from a variety of materials that record Earth’s magnetic field over the past 50 ka.Findings: Since its original release in 2006, the structure and function of the database have been updated and a significant number of data have been added. Notable...

Bibliothèque cantonale jurassienne

Redundant 230Th/234U/238U, 231Pa/235U and 14C dating of fossil corals for accurate radiocarbon age calibration

Chiu, Tzu-Chien

In: uaternary science reviews : the international multidisciplinary research and review journal, 2006, vol. 25, p. 2431-2440

Bibliothèque cantonale jurassienne

Radiocarbon calibration curve spanning 0 to 50,000 years BP based on paired 230Th/ 234U/ 238U and 14C dates on pristine corals

Fairbanks, Richard G.

In: Quaternary science reviews : the international multidisciplinary research and review journal, 2005, vol. 24, p. 1781–1796

Bibliothèque cantonale jurassienne

Extending the radiocarbon calibration beyond 26,000 years before present using fossil corals

Chiu, Tzu-chien

In: Quaternary science reviews : the international multidisciplinary research and review journal, 2005, vol. 24, p. 1797-1808