法医学杂志 ›› 2012, Vol. 28 ›› Issue (3): 161-166.DOI: 10.3969/j.issn.1004-5619.2012.03.001

• 论著 •    下一篇

窒息死大鼠肌肉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1,2,刘宁国1,邹冬华1,秦志强1,陈忆九1,黄  平1   

  1. (1. 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; 2. 复旦大学上海医学院法医学系,上海200032)
  • 发布日期:2012-06-25 出版日期:2012-06-28
  • 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;通信作者: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);上海市自然科学基金资助项目(09ZR1432900)

Relationship between PMI and Fourier Transform Infrared Spectral Changes in Muscle of Rats after Death Caused by Mechanical Asphyxial

LI SHI-YING1,2, SHAO YU1,2, LI ZHENG-DONG1,2, LIU NING-GUO1, ZOU DONG-HUA1, QIN ZHI-QIANG1, CHEN YI-JIU1, HUANG PING1   

  1. (1. Shanghai Key Laboratory of Forensic Medicine, Institute of Forensic Science, Ministry of Justice, P.R.China, Shanghai 200063, China; 2. Department of Forensic Medicine, Shanghai Medical College, Fudan University, Shanghai 200032, China)
  • Online:2012-06-25 Published:2012-06-28

摘要: 目的 应用傅里叶变换红外(Fourier transform infrared,FTIR)光谱技术分析大鼠死后心肌及骨骼肌随死亡时间推移的化学降解过程,为死亡时间推断提供新的途径与方法。 方法 大鼠机械性窒息处死后,在不同死亡时间点提取左心室心肌及骨骼肌,用FTIR光谱仪测定不同化学基团的变化,计算不同吸收峰吸光度(A)的比值,将吸光度比值(x)和死亡时间(y)进行曲线拟合建立6种数学模型。 结果 大鼠肌肉组织FTIR光谱的主要吸收峰随着死亡时间延长表现为增强、下降和稳定3种变化方式。三次方曲线有最佳的拟合相关系数,骨骼肌A1 080/A1 396相关系数最高(r=0.832),推断PMI更准确。 结论 应用FTIR光谱技术检测死后心肌和骨骼肌组织的光谱学改变在法医病理学死亡时间推断中具有一定的应用价值。

关键词: 法医病理学;谱学, 傅里叶变换红外;心肌;肌, 骨骼;死亡时间;大鼠

Abstract: Objective To observe the postmortem degradation process in rat myocardium and skeletal muscle using Fourier transform infrared(FTIR) spectroscopy and to provide a new method for estimating postmortem interval(PMI). Methods Left ventricle and skeletal muscles of rats dying of mechanical asphyxiated were sampled at different PMIs. The changes of different chemical functional group in the myocardium and skeletal muscle samples were measured by FTIR spectroscopy. 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 six mathematical models. Results FTIR spectral absorption peak of rat myocardium and skeletal muscle showed three changes: increase, decrease and stable. The cubic model function showed the strongest correlation coefficient. The A1 080/A1 396 ratio of skeletal muscle showed the strongest correlation coefficient (r=0.832) with more accurate determination of PMI. Conclusion FTIR spectroscopy can be potentially used as an effective method for estimating PMI in forensic practice using myocardium and skeletal muscle.

Key words: forensic pathology, spectroscopy, Fourier transform infrared, myocardium, muscle, skeletal, postmortem interval, rats

中图分类号: