FORS-2107EL Study Guide - Comprehensive Final Exam Guide - Chromatography, Vacuum, Solvent
20 Nov 2018
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Bpa is the study of the shapes, sizes, and locations of bloodstains in order to determine the physical events which gave rise to their origin. 1895: dr. eduard piotrowski published rst reference to bpa, in poland. 1939: dr. victor balthazard the rst ti use physical interpretations of stains. What we are looking for in a forensic sense: Position of assailant/ victim/ object during bloodletting. What we are looking for in an investigative sense: Ultimate goal of reconstructing the crime scene: There is passive stains, and ones that have force applied to them. 8% of human body weight is blood. Plasma (55%): 92% h2o, proteins, ions, gases, etc. Viscosity is a liquids resistance to change of form or ow due to the mutual attraction of the molecules to each other. The force that pulls the surface molecules, of the drop, towards the interior of liquid and therefore decreases the surface area. Larger surface area = greater surface tension.
