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Re: Forensics C

Posted: January 28th, 2020, 10:18 am
by 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?

Re: Forensics C

Posted: January 28th, 2020, 6:54 pm
by SilverBreeze
jaspattack wrote: January 28th, 2020, 10:18 am 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

Re: Forensics C

Posted: January 29th, 2020, 9:14 am
by jaspattack
SilverBreeze wrote: January 28th, 2020, 6:54 pm
jaspattack wrote: January 28th, 2020, 10:18 am 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!

Re: Forensics C

Posted: January 29th, 2020, 6:56 pm
by 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?

Re: Forensics C

Posted: February 6th, 2020, 4:42 pm
by lilacs10
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

Re: Forensics C

Posted: February 6th, 2020, 10:12 pm
by SilverBreeze
lilacs10 wrote: February 6th, 2020, 4:42 pm
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

Re: Forensics C

Posted: February 7th, 2020, 3:14 pm
by lilacs10
nice. your turn

Re: Forensics C

Posted: February 8th, 2020, 6:23 pm
by SilverBreeze
Sorry if I'm mistaken, but isn't it your turn? Forgot to put that in the last post.

Re: Forensics C

Posted: February 11th, 2020, 3:20 pm
by lilacs10
oops sorry :)
Anyways...
1. What is the chemical formula for luminol?
2. What is luminol used for in forensics investigations?
3. Define deliquescent.

Re: Forensics C

Posted: February 11th, 2020, 5:30 pm
by SilverBreeze
lilacs10 wrote: February 11th, 2020, 3:20 pm 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