Forensics C

[jaspattack]

1. What are the three layers of the hair shaft?
2. What fingerprinting test reacts with amino acids?
3. You encounter a plastic that floats in water and burns slowly with an acrid smell. What plastic is it, and what are three things it is typically used for?

[SilverBreeze]

1. What are the three layers of the hair shaft?
2. What fingerprinting test reacts with amino acids?
3. You encounter a plastic that floats in water and burns slowly with an acrid smell. What plastic is it, and what are three things it is typically used for?

1. cuticle, cortex, medulla
2. ninhydrin
3. polypropylene: rope, pipes, yogurt cups

[jaspattack]

1. What are the three layers of the hair shaft?
2. What fingerprinting test reacts with amino acids?
3. You encounter a plastic that floats in water and burns slowly with an acrid smell. What plastic is it, and what are three things it is typically used for?

1. cuticle, cortex, medulla
2. ninhydrin
3. polypropylene: rope, pipes, yogurt cups

All good - your turn!

[SilverBreeze]

1. Name one way to differentiate cow and horse hair.
2. Name the three insoluble powders.
3. When are beetles found on a carcass?

[lilacs10]

Click to Show Answer

1. Medulla: absent or continuous, amorphous or vacuolated; width may be narrow to very broad (without mosaic pattern) in cow and in horse Medulla: absent to unbroken; cellular to amorphous
2. Cornstarch, calcium carbonate, and calcium sulfate
3. 24-36? hours

[SilverBreeze]

Click to Show Answer

1. Medulla: absent or continuous, amorphous or vacuolated; width may be narrow to very broad (without mosaic pattern) in cow and in horse Medulla: absent to unbroken; cellular to amorphous
2. Cornstarch, calcium carbonate, and calcium sulfate
3. 24-36? hours

1 and 2 are correct, but for 3 the timeframe is on the scale of weeks to months

[lilacs10]

nice. your turn

[SilverBreeze]

Sorry if I'm mistaken, but isn't it your turn? Forgot to put that in the last post.

[lilacs10]

oops sorry
Anyways...
1. What is the chemical formula for luminol?
2. What is luminol used for in forensics investigations?
3. Define deliquescent.

[SilverBreeze]

oops sorry
Anyways...
1. What is the chemical formula for luminol?
2. What is luminol used for in forensics investigations?
3. Define deliquescent.

1. C8H7N3O2
2. determining presence of blood
3. absorbs moisture from air and dissolves in it