http://hdl.handle.net/10453/162 2013-06-19T16:19:06Z http://hdl.handle.net/10453/14250 Pyrolysis gas chromatography - mass spectrometry analysis for the estimation of pig bone age for forensic application Raja Sophil; Stuart Barbara; Thomas Paul; O'Brien Christopher D.N. Vieira, A. Busuttil, D. Cusach and P. Beth The potential of pyrolysis gas chromatography-mass spectrometry (Py-GCMS ) as a tool for the estimation of post-mortem age of bones has been investigated. Pig bone specimens prepared under controlled burial conditions in soil were studied and the post-mortem ages ranged from 3 to 48 months. Notable differences were observed in the data produced for younger bone specimens (<1 year) compared to specimens of greater post-mortem age (>1 year). Py-GCMS also demonstrates a relationship of particular peak ratios with the age of bones. The ratios of peaks in the pyrograms were examined and it was demonstrated that the ratios of certain pairs of peaks increase as the bone age increases. 2010-01-01T00:00:00Z http://hdl.handle.net/10453/14249 Adipocere formation in a river environment Notter Stephanie; Stuart Barbara; Dent Boyd; Langlois Neil D.N. Vieira, A. Busuttil, D. Cusach and P. Beth Adipocere is a late post-mortem decomposition product that consists of a mixture of fatty acids. The rate of formation of adipocere in a river water environment has been monitored. Adipocere formed from pig adipose tissue has been analysed using gas chromatography ¿ mass spectrometry (GCMS ) in order to determine the fatty acid composition, and hence, the degree of formation in the different environments. The study shows that the rate at which adipocere forms depends on the type of aqueous environment. 2010-01-01T00:00:00Z http://hdl.handle.net/10453/7823 Growth through Nanotechnology - Opportunities and Risks Schulte Jurgen Dr Jurgen Schulte 2005-01-01T00:00:00Z http://hdl.handle.net/10453/7822 Investigation of the degradation of sandstones in Sydney's heritage buildings Ip Kin Hong; Ray Abhi; Stuart Barbara; Thomas Paul C. Modena, P.B. Lourenco and P. Roca Sydney, with many of its heritage buildings and monuments constructed as a result ofthe first European settlement in the l800s, is a city built on a large block of sandstone. Although many ofthese buildings are still strong and sound, signs of deterioration have become evident in recent years. In order to prevent these precious buildings from further degradation, the weathering mechanisms of the stones must be thoroughly understood before suitable protection measures can be implemented. In this study, four techniques have been selected to detect chemical and physical differences between weathered and unweathered sandstones - Solid State Nuclear Magnetic Resonance (NMR) Spectroscopy, Thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC) and X-ray Photoelectron Spectroscopy (XPS). 2005-01-01T00:00:00Z