Blood stains on the fabric often appear at the scene of the crime. The age determination of blood stains can provide important information to speculate the time of crime. The relationship between the age of blood and ...Blood stains on the fabric often appear at the scene of the crime. The age determination of blood stains can provide important information to speculate the time of crime. The relationship between the age of blood and the bending rigidity of blooded cotton fabric washed was investigated experimentally via the use of FAST-2 bending tester. The bending length of blooded fabric washed at different time was measured and the bending rigidity was calculated.The relationship between the age of blood and the bending rigidity after washing was obtained through curve fitting. The result shows that the bending rigidity of blooded fabric washed is various with the increase of the age of blood stains and this relationship can be used to speculate the age of blood stains. This method provides a new perspective for determining the bloodstain age.展开更多
The Turin Shroud, recently accessible for hands-on scientific research, is now extensively investigated. Its pinkish red blood stains that seem anomalous ones are studied by modern techniques (notably by resolute opti...The Turin Shroud, recently accessible for hands-on scientific research, is now extensively investigated. Its pinkish red blood stains that seem anomalous ones are studied by modern techniques (notably by resolute optical microscopy and scanning electron microscopy coupled with energy dispersive X-ray). Exploration by these techniques of a blood stain located on the face permits us to discover some red-colour particles (hematite, biotite and cinnabar) of exogenous material in this stain. We finally characterize these red-colour particles and try to explain their presences in the blood stain. Globally, all these red-colour particles cannot explain all of the reddish appearance of the area under study.展开更多
基金Opening Project of Shanghai Key Laboratory of Crime Scene Evidence,China(No.2014243)Fundamental Research Funds for the Central Universities,China
文摘Blood stains on the fabric often appear at the scene of the crime. The age determination of blood stains can provide important information to speculate the time of crime. The relationship between the age of blood and the bending rigidity of blooded cotton fabric washed was investigated experimentally via the use of FAST-2 bending tester. The bending length of blooded fabric washed at different time was measured and the bending rigidity was calculated.The relationship between the age of blood and the bending rigidity after washing was obtained through curve fitting. The result shows that the bending rigidity of blooded fabric washed is various with the increase of the age of blood stains and this relationship can be used to speculate the age of blood stains. This method provides a new perspective for determining the bloodstain age.
文摘The Turin Shroud, recently accessible for hands-on scientific research, is now extensively investigated. Its pinkish red blood stains that seem anomalous ones are studied by modern techniques (notably by resolute optical microscopy and scanning electron microscopy coupled with energy dispersive X-ray). Exploration by these techniques of a blood stain located on the face permits us to discover some red-colour particles (hematite, biotite and cinnabar) of exogenous material in this stain. We finally characterize these red-colour particles and try to explain their presences in the blood stain. Globally, all these red-colour particles cannot explain all of the reddish appearance of the area under study.
