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UV-VIS and ATR-FTIR Spectroscopic Investigations of Postmortem Interval Based on Porcine Vitreous Humor
Başlık:
UV-VIS and ATR-FTIR Spectroscopic Investigations of Postmortem Interval Based on Porcine Vitreous Humor
Yazar:
Shum, Amanda S., author.
ISBN:
9780438070301
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (64 pages)
Genel Not:
Source: Masters Abstracts International, Volume: 57-06M(E).
Advisors: Donald J. Johnson Committee members: Katharine Tellis; Jay R. Vargas.
Özet:
The determination of the postmortem interval (PMI) is of great importance to forensic investigations. Although many methods are available, no single method can accurately and reliably determine the PMI. Previous studies have focused on biochemical analysis of body fluids to estimate the PMI; however, spectroscopic analysis of vitreous humor (VH) as a PMI indicator has not been reported. In this study, Ultraviolet-Visible (UV-Vis) and Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy were used to examine changes in the postmortem chemistry of porcine VH. The first study examined whole pig heads -- one kept in the refrigerator (4°C) and one at room temperature for a period of 5 days, while the second study examined 9 enucleated eyeballs over a period of 9 days. Changes in the amide I, II, and III regions in the IR spectra were observed with the disappearance of a band at around 1580 cm-1 and the appearance of bands at around 1630 and 1540 cm-1. Changes in the UV-Vis spectra were observed as well, with a 10 - 12 nm shift in lambdamax (~260 nm) to higher wavelengths. These results demonstrate that UV-Vis and ATR-FTIR spectroscopy may serve as a promising new tool to investigate postmortem changes in the VH and to estimate the PMI.
Notlar:
School code: 0962
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(692722.1) | 692722-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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