Chemistry and Finger Print Detection

How are latent fingerprints described in the video?

• Visible and clear

• Colorful and bright

• Irrelevant and unimportant

• Hidden and invisible

What was the chemical and what color appeared?

• lausone;green

• acetic acid; puple

• ninhydrin; purple

• ninhydrin; green

Why was she looking for an alternative to ninhydrin?

• It was hard to get the fluorescence and it had to be incubated for long periods.

• Ninhydrin is too expensive so they cannot use it as often as they would like.

• Ninhydrin only works about 50% of the time.

Lausone is a very similar compound to ninhydrin, but it works faster and does not destroy the ink on documents. The natural source where lausone is found is what?

• squid ink

• tree sap

• henna tattoo ink plant

• Mineral deposits

What is the overall theme of Prony's research as presented in the video?

• The complexity of chemistry

• The relationship between chemistry and everyday problems

• The history of fingerprinting

• The use of chemistry in cooking