Estimation of postmortem interval using attenuated total reflectance: Fourier transform infrared spectroscopy in adipose tissues
Estimation of postmortem interval (PMI) is vitally important in forensic investigations. Although many studies have examined the chemical changes of various tissues over time, no reports using spectroscopic methods in adipose tissue are available. In this study, attenuated total reflectance–Fourier...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2019-01-01
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| Series: | Journal of Forensic Science and Medicine |
| Subjects: | |
| Online Access: | http://www.jfsmonline.com/article.asp?issn=2349-5014;year=2019;volume=5;issue=1;spage=7;epage=12;aulast=Zhang |
| _version_ | 1819019114759323648 |
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| author | Haohui Zhang Qi Wang Kai Zhang Ruina Liu Shuanliang Fan Zhenyuan Wang |
| author_facet | Haohui Zhang Qi Wang Kai Zhang Ruina Liu Shuanliang Fan Zhenyuan Wang |
| author_sort | Haohui Zhang |
| collection | DOAJ |
| description | Estimation of postmortem interval (PMI) is vitally important in forensic investigations. Although many studies have examined the chemical changes of various tissues over time, no reports using spectroscopic methods in adipose tissue are available. In this study, attenuated total reflectance–Fourier transform infrared (ATR–FTIR) spectroscopy was utilized to collect comprehensive biochemical information from human adipose tissues in vitro at different times. Thereafter, mice were used as samples for in vivo experiments for more detailed studies on PMI. Then, partial least squares (PLS) model for PMI estimation was established based on the acquired spectral dataset of mouse samples. The spectral variable associated with C=O arising from lipids and free fatty acids was most susceptible to PMI. Moreover, the PLS model appeared to achieve a satisfactory prediction with a root mean square error of cross-validation of 1.78 days, and the reliability of the model was determined in an external validation set with a root mean square error of prediction of 1.87 days. The study shows the possibility of application of ATR–FTIR methods in PMI estimation using adipose tissue. |
| first_indexed | 2024-12-21T03:30:10Z |
| format | Article |
| id | doaj.art-5dc89d44b6cc415297bf731eb29958ff |
| institution | Directory Open Access Journal |
| issn | 2349-5014 |
| language | English |
| last_indexed | 2024-12-21T03:30:10Z |
| publishDate | 2019-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Journal of Forensic Science and Medicine |
| spelling | doaj.art-5dc89d44b6cc415297bf731eb29958ff2022-12-21T19:17:28ZengWolters Kluwer Medknow PublicationsJournal of Forensic Science and Medicine2349-50142019-01-015171210.4103/jfsm.jfsm_47_18Estimation of postmortem interval using attenuated total reflectance: Fourier transform infrared spectroscopy in adipose tissuesHaohui ZhangQi WangKai ZhangRuina LiuShuanliang FanZhenyuan WangEstimation of postmortem interval (PMI) is vitally important in forensic investigations. Although many studies have examined the chemical changes of various tissues over time, no reports using spectroscopic methods in adipose tissue are available. In this study, attenuated total reflectance–Fourier transform infrared (ATR–FTIR) spectroscopy was utilized to collect comprehensive biochemical information from human adipose tissues in vitro at different times. Thereafter, mice were used as samples for in vivo experiments for more detailed studies on PMI. Then, partial least squares (PLS) model for PMI estimation was established based on the acquired spectral dataset of mouse samples. The spectral variable associated with C=O arising from lipids and free fatty acids was most susceptible to PMI. Moreover, the PLS model appeared to achieve a satisfactory prediction with a root mean square error of cross-validation of 1.78 days, and the reliability of the model was determined in an external validation set with a root mean square error of prediction of 1.87 days. The study shows the possibility of application of ATR–FTIR methods in PMI estimation using adipose tissue.http://www.jfsmonline.com/article.asp?issn=2349-5014;year=2019;volume=5;issue=1;spage=7;epage=12;aulast=ZhangAdipose tissueattenuated total reflectance–Fourier transform infraredchemometricspostmortem interval |
| spellingShingle | Haohui Zhang Qi Wang Kai Zhang Ruina Liu Shuanliang Fan Zhenyuan Wang Estimation of postmortem interval using attenuated total reflectance: Fourier transform infrared spectroscopy in adipose tissues Journal of Forensic Science and Medicine Adipose tissue attenuated total reflectance–Fourier transform infrared chemometrics postmortem interval |
| title | Estimation of postmortem interval using attenuated total reflectance: Fourier transform infrared spectroscopy in adipose tissues |
| title_full | Estimation of postmortem interval using attenuated total reflectance: Fourier transform infrared spectroscopy in adipose tissues |
| title_fullStr | Estimation of postmortem interval using attenuated total reflectance: Fourier transform infrared spectroscopy in adipose tissues |
| title_full_unstemmed | Estimation of postmortem interval using attenuated total reflectance: Fourier transform infrared spectroscopy in adipose tissues |
| title_short | Estimation of postmortem interval using attenuated total reflectance: Fourier transform infrared spectroscopy in adipose tissues |
| title_sort | estimation of postmortem interval using attenuated total reflectance fourier transform infrared spectroscopy in adipose tissues |
| topic | Adipose tissue attenuated total reflectance–Fourier transform infrared chemometrics postmortem interval |
| url | http://www.jfsmonline.com/article.asp?issn=2349-5014;year=2019;volume=5;issue=1;spage=7;epage=12;aulast=Zhang |
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