Laser-Induced Breakdown Spectroscopy in Africa

Kasem, Mohamed; Harith, M. A.

doi:10.1155/2015/648385

Cited by 10 publications

(2 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, diagenesis is always a complex and site-specific process, controlled by different variables that may include temperature, humidity, hydrology, oxygen content, geochemical properties, pH, microbial attack, redox conditions of the burial environment, and also the skeletal tissue itself. Careful investigation and understanding to essentially remove or ignore those effects for a reconstruction model that bears all the fundamental characteristics of the previously living organism in its environment (Kasem & Harith, 2015;Huang et al, 2018;Wolf & Chilingarian, 1988).…”

Section: Introductionmentioning

confidence: 99%

Investigating Egyptian archeological bone diagenesis using ATR-FTIR microspectroscopy

Kasem

Yousef

Alrowaili

et al. 2020

Journal of Radiation Research and Applied Sciences

View full text Add to dashboard Cite

Bones are mainly composite materials of equivalent volume fractions of mineral (apatite) and organic (collagen) parts. Their infrared spectroscopic characteristics mirror their composition. Bone diagenesis is the post-depositional changes of calcified tissues by chemical degradation. It is a complicated process and affected by numerous external and individual factors. Diagenetic trajectories have been employed using Fourier transform infrared (FTIR) spectroscopy to monitor the preservation status of bioapatite. We studied the diagenesis in ancient Egyptian bones of four dynasties collected from two different locations -Sakkara and Aswan using attenuated total reflectance (ATR) FTIR microspectroscopy. Despite the latter is a promising technique since it is a minimally destructive tool, the samples' physical properties may affect the data accuracy. The studied bone pieces were from two sites, the shaft and the femur head. Transmission electron microscopy (TEM) was used to investigate the bone crystals size and shape. ATR-FTIR spectrographs showed different molecular fingerprints between Sakkara and Aswan soil samples. The technique was able to monitor different molecular structures across the shaft bones indicating different diagenetic grades. TEM micrographs showed low abundant crystals of needle shaped for Late period shaft bones, while those from Roman Greek period were characterized with abundant irregular thin platelet crystals.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigating Egyptian archeological bone diagenesis using ATR-FTIR microspectroscopy

Kasem

Yousef

Alrowaili

et al. 2020

Journal of Radiation Research and Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Additionally, LIBS can be used to perform high spatially resolved analysis. The fundamentals and applications of LIBS have been discussed in detail by many authors in numerous textbooks and review papers [14], [15], [16], [17]. With robust and compact state-of-the-art lasers and spectrometers, the simplicity of LIBS system equipment furnishes the possibility of in situ (e.g., in museums and in excavation locations) measurements using portable systems.…”

Section: Introductionmentioning

confidence: 99%