Optimizing FTIR method for characterizing diagenetic alteration of skeletal material

Cienkosz-Stepańczak, Beata; Szostek, Krzysztof; Lisowska-Gaczorek, Aleksandra

doi:10.1016/j.jasrep.2021.103059

Cited by 4 publications

(3 citation statements)

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“…In order to check the crystallinity of the samples and determine the degree of advancement of taphonomic processes, two indices commonly used to assess diagenesis were used: the crystallinity index (CI) and the carbonate to phosphate ratio (C/P) (Cienkosz‐Stepańczak et al, 2021; Dupras & Schwarcz, 2001; Lebon et al, 2010; White et al, 2004; Wright & Schwarcz, 1996). The CI of the bone samples was determined on the basis of the absorption height of the band with wave numbers 605 and 565 cm −1 , characteristic for asymmetric bending vibrations of apatite phosphate groups and their narrowing at 590 cm −1 according to the formula: CI = (A565 + A605) / A595 (Wright & Schwarcz, 1996).…”

Section: Methodsmentioning

confidence: 99%

Application of the microtomography technique in density studies of prehistoric and historical human skeletal materials

Tarasiuk

Mnich

Wroński

et al. 2023

Intl J of Osteoarchaeology

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Bone density is not a standard parameter examined during anthropological analysis, although researchers increasingly attempt to assess bone mineral density (BMD) in prehistoric populations. Computed tomography (CT) has great potential in this type of research. Micro CT is a precise and universal tool for bone density measurement based on CT value (attenuation factor of the X‐rays at a given point in space). Thirty‐four archaeological human radial bone samples from four chronologically and geographically different sites from southern Poland were examined here. Real BMD was measured (mass/volume) and compared with BMD obtained with the use of CT value results to verify correlation between those two parameters. The micro CT density values were estimated with an uncertainty of less than 0.03 g/cm3 in more than 75% of samples. This method does not require any special sample preparation and any substitute of soft tissues. This technique enables measurement of the cortical and cancellous bone separately in even partial or damaged bones.

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Section: Methodsmentioning

confidence: 99%

Application of the microtomography technique in density studies of prehistoric and historical human skeletal materials

Tarasiuk

Mnich

Wroński

et al. 2023

Intl J of Osteoarchaeology

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“…Since the intensity of TL is also proportional to the density of occupied traps, TL samples can be used as dosimeters to measure radiation exposure. Consequently, a significant portion of TL research focuses on radiation dosimetry [5][6][7][8][9][10][11][12].…”

Section: Extensive Research and Development Efforts Have Been Dedicatedmentioning

confidence: 99%

Studies of thermoluminescence properties of liquid crystalline N‐phenyl substituted phenyl polysiloxane hydroxamic acids

Pandya,

Sharma,

Desai

et al. 2024

Luminescence

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The investigation of thermoluminescence (TL) glow curves in liquid crystalline side chain N‐phenyl‐substituted phenyl polysiloxane hydroxamic acids (PHAs) has yielded significant insights. These polymers demonstrated TL behavior when exposed to β‐radiation between 0 and 220°C, indicating inherent luminescent properties when irradiated. Notably, a dose‐dependent relationship was observed in reported derivatized polymers; this study elucidates the diverse TL characteristics exhibited by various liquid crystalline side chain N‐phenyl‐substituted phenyl PHAs when exposed to β‐radiation. Understanding these dose‐dependent and dose‐independent behaviors enhances the knowledge of their luminescent properties and potential applications in radiation detection.

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“…Diagenesis refers to physical and chemical changes resulting mainly from the direct contact of bones with the soil or substrate in which they are inhumed including the action of water, micro‐organisms, and plants (Fernández‐Jalvo et al, 2010; Hedges, 2002; Jans et al, 2004). Its effect on bone is also ruled by other factors such as the intrinsic characteristics of the remains (e.g., cortical vs. trabecular bone tissue) (Cienkosz‐Stepańczak et al, 2021; Lam et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Burned and buried: A vibrational spectroscopy analysis of burial‐related diagenetic changes of heat‐altered human bones

Rosa

Vassalo

Amarante

et al. 2023

American Journal of Biological Anthropology

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Objectives The analysis of burned human remains can be very challenging due to heat‐induced alterations. Occasionally, human bones present these coupled with diagenetic changes, offering even more of a challenge, since there is a lack of studies regarding interactions between both taphonomic phenomena. With this study, we aimed to assess and document the effects of inhumation on the chemical composition of both unburned and burned human skeletal remains. Materials and Methods We buried, for 5 years, four groups of human bone samples comprising unburned bones and bones experimentally burned at 500, 900, and 1050 °C. Periodic exhumations were carried out to collect bone samples to be analyzed through Fourier transform infrared spectroscopy in attenuated total reflectance mode, in order to calculate four chemical indexes: (1) crystallinity index (CI); (2) type B carbonates to phosphate index (BPI); (3) total carbonates (A + B) to carbonate B ratio (C/C); and (4) OH to phosphate ratio (OH/P). Results After inhumation, CI and C/C of unburned bones and bones burned at 500 °C, and BPI of bones burned at 1050 °C did not vary significantly. However, the remaining indexes showed both relevant increments and reductions throughout observations, depending on burning temperature and index. Discussion Our results suggest that diagenesis can have an effect in bone's molecular composition. However, these effects do not seem to significantly affect the conclusions that can be taken from the analysis of infrared bone spectra, at least in the case of inhumations with a duration of 5 years or less.

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Optimizing FTIR method for characterizing diagenetic alteration of skeletal material

Cited by 4 publications

References 61 publications

Application of the microtomography technique in density studies of prehistoric and historical human skeletal materials

Application of the microtomography technique in density studies of prehistoric and historical human skeletal materials

Studies of thermoluminescence properties of liquid crystalline N‐phenyl substituted phenyl polysiloxane hydroxamic acids

Burned and buried: A vibrational spectroscopy analysis of burial‐related diagenetic changes of heat‐altered human bones

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