Consolidation of Archaeological Bone: A Conservation Perspective

Johnson, Jessica S.

doi:10.1179/009346994791547661

Cited by 50 publications

(12 citation statements)

References 12 publications

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“…In the particular case of historical bones, up to now, different methods of application of consolidates have been used for the restoration, brushing, immersion in solutions, or impregnation with consolidating agents, for instance [23,[25][26][27]. However, historical bones might present low mechanical consistency and it would be recommended to use less aggressive consolidation treatment methods.…”

Section: Introductionmentioning

confidence: 99%

Airbrushed Polysulfone (PSF)/Hydroxyapatite (HA) Nanocomposites: Effect of the Presence of Nanoparticles on Mechanical Behavior

2022

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Nanocomposite films of polysulfone (PSF)—hydroxyapatite (HA) were prepared with a commercial airbrush. Structural, thermal, and mechanical characterization allows obtaining new information to understand the role of the nanofiller–polymer matrix interphase in the final performance of these materials in relation to its possible applications in the restoration of bones. Fourier-transform infrared spectroscopy shows that there are hardly any structural changes in the polymer when adding HA particles. From thermal analysis (differential scanning calorimetry and thermogravimetry), it can be highlighted that the presence of HA does not significantly affect the glass transition temperature of the PSF but decelerates its thermal degradation. All this information points out that any change in the PSF performance because of the addition of HA particles cannot be due to specific interactions between the filler and the polymer. Results obtained from uniaxial tensile tests indicate that the addition of small amounts of HA particles (1% wt) leads to elastic moduli higher than the upper bound predicted by the rule of mixtures suggesting there must be a high contribution of the interphase. A simple model of the nanocomposite is proposed for which three contributions must be considered, particles, interphase and matrix, in such a way that interphases arising from different particles can interact by combining with each other thus leading to a decrease in its global contribution when the amount of particles is high enough. The mechanical behavior can be explained considering a balance between the contribution of the interphase and the number of particles. Finally, a particular mechanism is proposed to explain why in certain nanocomposites relatively high concentrations of nanoparticles may substantially increase the strain to failure.

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Section: Introductionmentioning

confidence: 99%

Airbrushed Polysulfone (PSF)/Hydroxyapatite (HA) Nanocomposites: Effect of the Presence of Nanoparticles on Mechanical Behavior

2022

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“…As the bones were intensely affected by the exposure to physical agents (soil acidity), they called for a consolidation procedure. A construction product based on PVA (polyvinyl acetate) was used in the primary approach in an attempt to preserve and consolidate the frail elements and to connect the extremities of the long bone fragments [ 16 , 17 ].…”

Section: Methodsmentioning

confidence: 99%

Morphological Characteristics of a Horse Discovered in an Avar-Period Grave from Sâncraiu de Mureș (Alba County, Romania)

Gudea

Martonos

Cosma³

et al. 2022

Animals

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Archeozoological studies provide an insight into human–environment relations, bringing important information on the morphology of the animal and the role of the animal and its functions. The purpose of this study was to reveal the morphological characteristics of the horse identified in an 8th century BC Avar cemetery dated, as it resulted from the investigation carried out on the materials presented to the Anatomy Lab of Department of Comparative Anatomy. The cleaning and conditioning of the materials were performed in the lab, followed by anatomical and osteometrical study. The identification of the species, the osteometrical interpretation and the assessment of age at death constituted the basis of the main conclusions. Based on the morphological and metrical data, we concluded that the fragments originated from a single young horse individual (Equus caballus) no older than 2.5 (2–2.5 years age span) included into class 5 of height (Vitt scale) with slender extremities. An overview of the available data (horse morphology) from similar sites in Romania and neighboring territories (Hungary and Croatia) is presented, with the intention of a general framing for the characteristics of the horses used by the Avar populations.

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“…The first interventions carried out on fossils were performed with triterpenoid resins such as dammar, and other natural products: shellac, waxes and organic glues of animal origin [2][3][4]. These substances cause chromatic changes on the surface and yellowing, and they have shown a low compatibility with the fossil substrate in the long term, mainly because of their lack of plasticity [5]. These problems have led to their replacement by synthetic adhesives such as epoxy resins, cyanoacrylates, polyurethanes, fluorinated resins, and especially acrylic and vinyl polymers [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Innovations in the Use of Paraloid B-72® As a Surface Adhesive Method for Conservation of Bones and Fossils

J¹

2023

JAAS

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Consolidation and adhesion processes are key in the structural conservation of bones and fossils. It is therefore necessary to choose the most suitable products to ensure proper preservation of these cultural assets, evaluating their adhesion power, chemical compatibility, reversibility, stability and minimal interference with future analyses. For this purpose, we are putting forward a new way of using Paraloid B-72®, presenting a new application format as an adhesive in sheets, which can be prepared with different concentrations, formats and drying times. Its adhesive efficacy, penetration capacity and reversibility have been tested, showing good results for its application in the conservation and restoration treatments of these cultural assets.

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Consolidation of Archaeological Bone: A Conservation Perspective

Cited by 50 publications

References 12 publications

Airbrushed Polysulfone (PSF)/Hydroxyapatite (HA) Nanocomposites: Effect of the Presence of Nanoparticles on Mechanical Behavior

Airbrushed Polysulfone (PSF)/Hydroxyapatite (HA) Nanocomposites: Effect of the Presence of Nanoparticles on Mechanical Behavior

Morphological Characteristics of a Horse Discovered in an Avar-Period Grave from Sâncraiu de Mureș (Alba County, Romania)

Innovations in the Use of Paraloid B-72® As a Surface Adhesive Method for Conservation of Bones and Fossils

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