#forensics

Forensic examination of ancient preserved bodies found in Irish bogs.

4 months, 3 weeks ago

Intro to trace evidence.

1 year, 7 months ago

Cartidges and bullets

1 year, 7 months ago

This is a demonstration of the 'narcopouch' screening color tests used to test bulk drugs.

1 year, 7 months ago

This is one of the presumptive (screening) tests for blood. It uses phenolpthalin being oxidized by oxygen to phenolpthalein. In a basic solution, phenolpthalien is pink, but phenolpthalin is colorless. The catalase in blood catalyzes the decomposition of hydrogen peroxide to oxygen, causing the oxidation. Iodide ion will also catalyze that decomposition.

1 year, 7 months ago