FNSC2200 Lecture Notes - Lecture 6: Blood Residue, Luminol, Haematin
Document Summary
A bloodstain is a transfer of liquid when a liquid blood comes into contact with a surface, or when a wet/moist surface comes into contact with dried blood. Blood ~ 5x viscous than water (5x resistant to flow) List 8 ways by which blood can be identified (presumptive / confirmatory) Peroxidase reaction of haemoglobin that produces a pink colour. Immunochromatographic test for detecting the presence of human haemoglobin. Are antibodies that detect presence of rbc membrane molecules. Bloodstain classification / properties of blood determine how bloodstain look on certain surfaces. Depends on surface texture, some will have satellite stains. Shows different directionality with increased angulation with decreased angles of impact. Longer lines = lower angles of impact = increased angulation (page 20: transfer. Swipes = one edge feathered, indicate direction of travel. Wipes = created when a non-bloody surface wipes through a bloody surface.
