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Related Concept Videos

Effects of EDTA on End-Point Detection Methods01:18

Effects of EDTA on End-Point Detection Methods

Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a result, EDTA...

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Related Experiment Video

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Preparation and Application of a New Bacterial Biosensor for the Presumptive Detection of Gunshot Residue
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Deterring gun crime materially using forensic coatings.

Paul A Sermon1, Myles P Worsley, Yu Cheng

  • 1Nanomaterials Laboratory, Wolfson Centre for Materials Processing, Brunel University, Uxbridge UB8 3PH, UK. paul.sermon@brunel.ac.uk

Forensic Science International
|May 22, 2012
PubMed
Summary

New nanoengineered surface coatings on cartridge cases enhance forensic evidence. These coatings aid in solving gun crime by donating nanotags and retaining handler DNA for improved identification.

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Area of Science:

  • Materials Science
  • Forensic Science
  • Nanotechnology

Background:

  • Gun crime presents significant challenges for forensic investigations.
  • Current forensic methods rely on trace evidence, which can be limited.
  • The need for advanced techniques to link firearms to individuals is critical.

Purpose of the Study:

  • To develop and evaluate novel nanoengineered surface coatings for firearm-related forensic applications.
  • To enhance the associative evidence derived from cartridge cases.
  • To improve the identification of individuals involved in gun-related incidents.

Main Methods:

  • Application and evaluation of nanoengineered coatings on brass cartridge cases.
  • Analysis of nanotag donation from coated surfaces to handlers.
  • Assessment of DNA retention on coated cartridge cases.

Main Results:

  • The nanoengineered coatings successfully donated nanotags to handlers.
  • Significant retention of handler's DNA was observed on the coated cartridge cases.
  • The coatings demonstrably increased associative forensic evidence.

Conclusions:

  • Nanoengineered surface coatings offer a promising approach to deter and solve gun crime.
  • These coatings enhance forensic capabilities by improving trace evidence and DNA recovery.
  • The technology has potential for broader applications on various surfaces and conditions in the future.