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New Blood Analyzer Tells Human from Animal Samples on the Spot


Scientific American
The system could someday provide fast results at a crime scene
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A sleepy driver on a dark road hears a loud “thump!” and later finds a speck of blood on the front bumper. Or police spot a tiny but suspicious bloodstain at a crime scene. Quickly determining whether such traces come from humans or animals is crucial, but the necessary tests can be time-consuming and may destroy valuable evidence. Researchers say a new technique could help.
To develop a rapid, nondestructive way to identify human blood, State University of New York at Albany forensic chemists Igor Lednev and Ewelina Mistek-Morabito combined spectroscopy and statistics. They shined infrared light on dried samples of human blood and on those of 10 animal species, including common pets such as dogs, cats and ferrets, as well as deer and elk (both of which are often struck by vehicles). The researchers recorded the reflected light, the spectrum of which changes based o ....

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Forensic Scientists Unlocking Unique Chemical Signatures in Tires


Forensic Scientists Unlocking Unique Chemical Signatures in Tires
Researchers based in Florida may have just unlocked a new way to collect evidence from skid marks left by cars
April 28, 2021
The University of Central Florida team used laser-induced breakdown spectroscopy (LIBS) on each sample. The technique focuses a laser onto the tire sample, which creates a microscopic plasma that emits light according to the chemical elements present. The spectroscopy comes in because it analyzes this light and matches it to the corresponding chemicals. It s the same technique that instruments aboard the Mars rovers (Curiosity and Perseverance) use to determine what kinds of elements are found within the rocks of Mars. ....

United States , University Of Central Florida , John Lucchi , University Of Central Florida Karen Norum , National Center , Central Florida , Matthieu Baudelet , Forensic Science , Applied Spectroscopy , ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆஃப் மைய புளோரிடா , தேசிய மையம் , மைய புளோரிடா , தடயவியல் அறிவியல் , பயன்படுத்தப்பட்டது ஸ்பெக்ட்ரோஸ்கோபி ,