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bones and can be liberated under some pathological conditions [ 5 ]. Bones are complex in structure and are sensitive to environmental factors. It is a composite material consisting of ~10% water, 30% organic material (mainly collagen), and 60% inorganic
Abstract
The use of thermogravimetric analysis–mass spectrometry (TGMS) to study the state of preservation of archaeological bones has been investigated. As part of a collaborative multi-analytical study, bones exhumed from graves of the late Roman period in France and Italy were examined. A decrease in organic matter for the archaeological bones compared to that for new bone was confirmed, demonstrating that diagenesis of aged bones can be detected using TGMS. Different amounts of collagen were determined for bones from different graves and could, for the majority of specimens, be correlated with the visually observed preservation states.
Abstract
Bone provides an important source of forensic evidence. The storage conditions of bone have been recognised as a factor in maintaining the integrity of such evidence. Thermogravimetric analysis (TG) has been employed to examine the effects of storage environments and preparation methods on the structural properties of pig bones. A comparison of oven and freeze drying has been made to study the effect of storage conditions. A comparison has also been made of ground bone specimens with cut specimens. Freeze-dried hand ground specimens provided the most consistent results and, thus, this is the recommended method of preparation of bone specimens for TG analysis.
Abstract
An accurate means of determining bone age is a goal for forensic scientists. In this study, thermogravimetric analysis (TGA) has been used to examine pig bone specimens of different post-mortem age. Analysis of bone in both air and nitrogen atmospheres reveals a decrease in total mass loss as the bones age. Two mass loss steps due to the decomposition of the organic bone components were observed and show decreasing trends with age for decomposition in an air atmosphere. In a nitrogen atmosphere the decomposition was observed to be more complex and age dependence of the mass loss for each step was not identified. The TGA data, however, demonstrates the potential of the technique as a means of estimating post-mortem age of forensic bone specimens.
Abstract
Late-Quaternary material of various rodent species remnants (lower jaws and teeth) of different depth and age burials from zoogenic deposits in karstic cavities of the Urals (Russia) has been analyzed by thermogravimetry, differential thermal analysis, differential scanning calorimetry, and inductively coupled plasma mass spectrometry. Exothermic peaks position and shape as well as quantitative values of mass loss and heat effects (especially parameters of organic matter combustion at 200–600 °C) were found to vary significantly depending on bone’s age and fossilization conditions. On the basis of correlation between bone organic component and corresponding concentrations of some trace elements, three different types of fossilization had been proposed. The obtained values of the organic contents in the bone remnants of similar type and location were used to identify different age admixtures as well as chronologically systematize large sample collections.
Abstract
The paper presents the changes in the thermal properties of control, arsenic exposed and DMSA treated Labeo rohita bones by using thermo analytical techniques. The result shows that the mass loss due to the thermal decomposition occurs in three distinct steps due to loss of water, organic and inorganic materials. The arsenic exposed bones present a different thermal behaviour compared to the control bones. The residue masses are increased due to arsenic exposure, while the DMSA treatment reduces the residue mass level. These thermal characteristics can be used as a qualitative method to check the metal accumulation in samples.
Confavreux, C. B., Levine, R. L., Karsenty, G.: A paradigm of integrative physiology, the crosstalk between bone and energy metabolisms. Mol. Cell. End., 2009, 310 , 21
Hartsell, W. F., Scott, C. B., Watkins Bruner, D., et al.: Randomized trial of short- versus long-course radiotherapy for palliation of painful bone metastases. J. Natl. Cancer Inst., 2005, 97
Introduction Bone marrow is the largest hematopoietic organ in mammals. It compounds from 3% to 5% of total body weight [1] . Hematopoiesis in bones begins at the prenatal period and continues throughout life [2] . Therefore
Mori, G., D’Amelio, P., Faccio, R., et al.: The interplay between the bone and the immune system. Clin. Dev. Immunol., 2013, 2013, Article ID 720504. Danks, L., Takayanagi
