Korean Journal of Clinical Laboratory Science (대한임상검사과학회지)

Korean Society for Clinical Laboratory Science (대한임상검사과학회)
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Development of a New Artificial Latent Fingerprint Aqueous Solution by Improving Lipid Composition

지질조성 개선을 통한 새로운 인공 잠재지문 수용액의 개발

  • Sang-Yoon LEE (Department of Forensic Sciences, Graduate School of Health Sciences, Yonsei University MIRAE Campus) ;
  • Hwa-Seon LIM (Department of Forensic Sciences, Graduate School of Health Sciences, Yonsei University MIRAE Campus) ;
  • Ki-Jong RHEE (Department of Forensic Sciences, Graduate School of Health Sciences, Yonsei University MIRAE Campus)
  • 이상윤 (연세대학교 보건과학대학원 과학수사학과) ;
  • 임화선 (연세대학교 보건과학대학원 과학수사학과) ;
  • 이기종 (연세대학교 보건과학대학원 과학수사학과)
  • Received : 2024.02.13
  • Accepted : 2024.03.07
  • Published : 2024.03.31
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Abstract

Previous artificial latent fingerprint solution has shown unsatisfactory results. Therefore, in this study, we developed an artificial latent fingerprint solution close to the actual fingerprint composition by improving the lipid composition. We mixed lipid solution with amino acid solution at v/v ratios as follows: 2:3, 1:4, 1:5, 1:8, 1:10, 1:20. We then dropped the same amount of each proportion of artificial latent fingerprint solution on porous paper and non-porous slide glass. Subsequently, each sample was treated with Oil red O, Cyanoacrylate fuming and Basic yellow 40 staining. As the concentration of lipids decreased, the output also decreased. Both types of surfaces and all concentrations were visually confirmed very well. In addition, the reactivity to lipids was significantly higher compared to the previous artificial latent fingerprint solution. Furthermore, for the quantitative evaluation, it is necessary to conduct additional research on the printing of the artificial latent fingerprint solution.

이전의 선행연구에서 제시된 인공 잠재지문 수용액은 실제 잠재지문 현출력에서 부족한 결과를 보였다. 이에 본 연구에서는 지질 성분을 개선하여 실제 지문 조성과 유사한 인공 잠재지문 수용액을 개발하였다. 아미노산 수용액과 지질 수용액을 부피 비 3:2, 4:1, 5:1, 8:1, 10:1, 20:1로 혼합하여 일정량을 다공성 표면인 종이와 비다공성 표면인 슬라이드 글라스에 떨어뜨린 후 각각 Oil red O, Cyanoacrylate 기법 및 Basic yellow 40 염색을 적용하여 현출하였다. 지질의 농도가 감소할수록 현출력 또한 감소하였지만, 두 종류의 표면 및 모든 농도에서 충분히 육안으로 식별되었다. 또한 기존에 제시된 인공 잠재지문 수용액과 비교하였을 때 지질 반응성 지문 현출 시약에 대한 반응성이 현저히 높은 것을 확인할 수 있었다. 향후 본 인공 잠재지문 수용액을 지문 융선대로 프린팅하여 실제 잠재지문과 조성이 유사한 인공 잠재지문을 제작하여 지문 연구에 대한 정량적인 샘플 제작이 가능할 것으로 기대된다.

Keywords

Acknowledgement

The study was conducted with the financial support of new researcher support project from National Research Foundation organized by Ministry of Science and ICT (grant number: NRF-2022R1C1C2012596).

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