Quantitative approach to the conservation of bone collections by means of solid state NMR spectroscopy

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Quantitative approach to the conservation of bone collections by means of solid state NMR spectroscopy

Popis výsledku v původním jazyce

The identification of markers of the modifications occurring in human bones after death in order to assess their state of preservation is of interest for several scientific disciplines and in museums for conservation purposes. To this aim, two indices, obtained from the spectral deconvolution of the 31P and 1H MAS NMR spectra of bones, expressing the relative amount of external amorphous hydrated layer in the apatite platelets of the bone mineral compartment and relating the number of organic protons to the amount of hydrogen nuclei in the OHgroups of bioapatite, respectively, are proposed (Fig. 1). They have been applied to describe the state of preservation of osteological material from three different sites, including one skeletal collection open to the public and bone material hosted in the National Museum in Prague (Czech Republic). The latter index was found to correlate positively with the P/A index obtained from infrared spectroscopy (Fig. 1), and considered an indicator of changes in collagen content relative to the changes in the mineral fraction, as a consequence of alteration of the bone signature at the time of death. Their sensitivity to changes in the physical and chemical characteristics of bone allowed to identify conditions posing a threat to the preservation of the bones and to recognize distinct diagenetic pathways specific to each group and linked to the burial conditions [1,2,3,4].

Název v anglickém jazyce

Quantitative approach to the conservation of bone collections by means of solid state NMR spectroscopy

Popis výsledku anglicky

The identification of markers of the modifications occurring in human bones after death in order to assess their state of preservation is of interest for several scientific disciplines and in museums for conservation purposes. To this aim, two indices, obtained from the spectral deconvolution of the 31P and 1H MAS NMR spectra of bones, expressing the relative amount of external amorphous hydrated layer in the apatite platelets of the bone mineral compartment and relating the number of organic protons to the amount of hydrogen nuclei in the OHgroups of bioapatite, respectively, are proposed (Fig. 1). They have been applied to describe the state of preservation of osteological material from three different sites, including one skeletal collection open to the public and bone material hosted in the National Museum in Prague (Czech Republic). The latter index was found to correlate positively with the P/A index obtained from infrared spectroscopy (Fig. 1), and considered an indicator of changes in collagen content relative to the changes in the mineral fraction, as a consequence of alteration of the bone signature at the time of death. Their sensitivity to changes in the physical and chemical characteristics of bone allowed to identify conditions posing a threat to the preservation of the bones and to recognize distinct diagenetic pathways specific to each group and linked to the burial conditions [1,2,3,4].

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů