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Analysis of Biomarkers Using Optical Electronic-Nose

광학식 전자코에 의한 생체표지자 분석

  • Yi, Seung-Hwan (College of Convergence Technology, Korea National University of Transportation) ;
  • Kim, Jung-Sik (Department of Industrial and Management, Korea National University of Transportation) ;
  • Yi, Su-Uk (College of Korean Medicine, Dongguk University)
  • 이승환 (한국교통대학교, 융합기술대학) ;
  • 김정식 (한국교통대학교, 산업경영공학과) ;
  • 이수욱 (동국대학교 한의과대학)
  • Received : 2019.04.17
  • Accepted : 2019.05.28
  • Published : 2019.05.31

Abstract

The biomarkers related to the colorectal cancers and diseases were surveyed and summarized, and an optical electronic nose was researched and developed for their analysis. The prototyped sensor revealed that it could discriminate two gases: ethanol 2000 ppm and $CO_2$ 500 ppm. Furthermore, the sensor demonstrated the potential capability of estimation of $CO_2$ concentration with 95% confidence level. Based on the above experimental results, the developed optical electronic nose was tested with the mixtures of gases (Isopropyl Alcohol, Acetone, Methanol, and Toluene) and the biomarkers were successfully segregated using principal component analysis.

Keywords

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Fig. 1. Optical electronic-nose for screening of colorectal diseases.

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Fig. 2. Experimental setup for testing optical e-nose: (a) photo of measurement system, (b) block diagram of measurement system.

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Fig. 3. Voltage differences of optical gas sensor as a function of center wavelength.

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Fig. 4. Cumulated output voltage difference as a function of CO2 concentrations.

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Fig. 5. Principal component analysis (PCA) of CO2 and ethanol gases and mixtures of gases: Iso-propyl alcohol (IPA), methanol (M), acetone (A) and toluene (T).

Table 1. Biomarkers surveyed from the articles related to the colorectal diseases and their central absorption wavelength.

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