法医学杂志 ›› 2012, Vol. 28 ›› Issue (5): 321-326.DOI: 10.3969/j.issn.1004-5619.2012.05.001

• 论著 •    下一篇

窒息死大鼠肝脾傅里叶变换红外光谱变化与死亡时间的关系

黎世莹1,2,邵  煜1,2,李正东2,邹冬华2,秦志强2,陈忆九2,黄  平2   

  1. (1. 复旦大学上海医学院法医学系,上海 200032; 2. 司法部司法鉴定科学技术研究所 上海市法医学重点实验室,上海 200063)
  • 发布日期:2012-10-25 出版日期:2012-10-28
  • 通讯作者: 黄平,男,博士,副研究员,副主任法医师,主要从事法医病理学研究;E-mail:huangpingifs@gmail.com 陈忆九,男,研究员,博士研究生导师,主要从事法医病理学研究;E-mail:yijiuchen@yahoo.com.cn
  • 作者简介:黎世莹(1987—),女,上海人,硕士研究生,主要从事法医病理学研究;E-mail:11211010057@fudan.edu.cn
  • 基金资助:

    国家自然科学基金资助项目(81001350);国家自然科学基金面上项目(81273339);上海市自然科学基金资助项目(09ZR1432900,12DZ2271500)

Relation between PMI and FTIR Spectral Changes in Asphyxiated Rat’s Liver and Spleen

LI SHI-YING1,2, SHAO YU1,2, LI ZHENG-DONG2, ZOU DONG-HUA2, QIN ZHI-QIANG2, CHEN YI-JIU2, HUANG PING2   

  1. (1. Department of Forensic Medicine, Shanghai Medical College, Fudan University, Shanghai 200032, China; 2. Shanghai Key Laboratory of Forensic Medicine, Institute of Forensic Science, Ministry of Justice, P.R.China, Shanghai 200063, China)
  • Online:2012-10-25 Published:2012-10-28

摘要: 目的 应用傅里叶变换红外(Fourier transform infrared,FTIR)光谱技术观察窒息死大鼠肝、脾组织的光谱变化规律,寻找推断死亡时间的新方法。 方法 将大鼠机械性窒息处死后,尸体保存于(20±2) ℃的环境下,提取死后15 d内各时间点肝、脾组织样本,进行红外光谱测量,运用统计软件推导大鼠死后肝、脾组织不同区域的吸收峰吸光度(A)比值(x)对死亡时间(y)拟合的数学模型。 结果 吸光度比值随大鼠死亡时间的延长呈上升、下降及保持稳定3个趋势。最佳拟合曲线为三次方曲线,肝较脾的拟合相关系数高,其中肝A1 541/A1 396的相关系数最高(r=0.966)。大多数吸光度比值从死后6~7 d开始呈平台期。 结论 FTIR光谱技术作为推断死亡时间的新方法,在推断7 d以内的死亡时间具有一定的应用价值。

关键词: 法医病理学, 窒息, 谱学, 傅里叶变换红外, 肝, 脾, 死亡时间, 大鼠

Abstract: Objective Fourier transform infrared (FTIR) spectroscopy was applied to observe the postmortem degradation process in mechanical asphyxiated rat’s liver and spleen for providing a new method of estimating PMI. Methods Rats were sacrificed by mechanical asphyxia and cadavers were kept at (20±2) ℃ in a control chamber. The liver and spleen were sub-sampled from the same rat at intervals of 0-15 days postmortem and the data were measured by FTIR spectrometer. The different absorbance (A) ratios of peaks were calculated and the curve estimation analysis between absorbance ratios (x) and PMI (y) were performed to establish mathematical models by the statistical software. Results The band absorbance ratios showed increase, decrease and stable with PMI. The cubic model functions showed the strongest correlation coefficient. Compared with the spleen, the liver showed a higher correlation coefficient. The A1 541/A1 396 of liver showed the highest correlation coefficient(r=0.966). After 6-7 days postmortem, band absorbance ratios showed a steady period. Conclusion FTIR spectroscopy can be a new and efficient method to estimate PMI within 7 days.

Key words: forensic pathology, asphyxia, spectroscopy, Fourier transform infrared, liver, spleen, postmortem interval, rats

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