GHB 약물의 특성과 검출기법 현황 분석을 통한 마약류의 기술․제도적 안전대책 확보 방안 연구

오상재,유승진 경찰대학 2021 공공안전학연구 Vol.2 No.1

마약류는 해외 유입뿐만 아니라 국내에서 제조 및 유통되는 사례까지 확인되면서 마약류로 인한 국민 안전의 위협은 증가하고 있다. 데이트 강간 약물인 ‘감마 하이드록시낙산(Gamma-Hydroxybutyric acid, GHB)’ 역시 일반의약품, 식품첨가제 등으로부터 합성 가능하여 국내에서 제조 및 유통될 위험성이 높은 물질이며, 국민안전을 위협하는 대표적인 약물 중 하나이다. 특히, GHB는 내인성 물질이며, 복용 후 체내에서 단시간 내 배출되어 검출이 어려운 약물로 GHB를 검출하기 위한 표준 분석기법 및 현장용 탐지 키트의 기술적 연구와 함께 GHB 제조 및 유통을 예방하기 위한 제도적 보완이 필요한 실정이다. 본 연구는 GHB 약물의 특성, 제조법 및 검출기법 현황 분석을 기반으로 마약류 범죄 대응을 위한 기술․제도적 안전대책 확보방안을 제시하고자 하였다. 먼저, 기술적 측면에서 마약류의 정량적 검출한계 확립, GHB 중간대사체 검출기법 연구, 휴대용 분광분석기를 활용한 현장 마약류 정밀 분석 기법 확립과 범죄 현장에서 신속하게 적용 가능한 마약탐지키트의 연구개발이 수행되어야 하며, 이와 더불어 제도․정책적 보완 방안으로 불법 제조에 악용될 수 있는 원료물질에 대한 제도적 유통 감시 방안 및 약물 범죄 예방을 위한 관리체계 법안 제정이 필요하다.

1P-474 Preparation of Porous Copper-Manganese Oxide Catalyst Utilizing Alkaline Silicate Solution

오상재,이석민,이학송,이희숙,한양수 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1

Nanoporous copper-manganese oxide catalyst was prepared by a redox-precipitation method utilizing basic alkali silicate solution (Na₂SiO₃) as a pH controlling agent and porous inorganic support. Upon titrating the sodium silicate solution during the redox precipitation reaction, the Cu:Mn mole ratio in the precipitate becomes close to the nominal composition of 1:4 along with the decrease of Cu²⁺ concentration in the residual solution, indicating that the addition of alkaline silicate solution is helpful to obtain stoichiometric oxide catalyst and the reduction of waste water. In addition. alkali silicate titration resulted in the increase of specific surface area of the catalyst powder mainly due to the micropore development. Concerning to the CO removal performance of the catalyst powder, the CO removal efficiency is increased as the sodium silicate content increased when the removal efficiency is normalized to the active CuO:MnO catalyst content.

다양한 표면에 유류된 잠재지문 현출시 친수성 양자점 나노 분말의 영향

오상재,유승진 한국과학수사학회 2022 과학수사학회지 Vol.16 No.3

In this research, hydrophilic quantum dot nano-powder (GQD@SiO2) was applied to compare the development of latent fingerprint on various surfaces and the development of latent fingerprint over time after fingerprint deposited. Hydrophilic quantum dot nano-powder exhibited green fluorescence under a wavelength of 365 nm ultraviolet, and increased adsorption characteristics through interaction with hydrophilic components in latent fingerprints showed clear minutiae on non-porous and semi-porous surfaces. It was difficult to express fingerprints on porous surfaces where fingerprint components were quickly absorbed, but on non-porous and semi-porous surfaces where fingerprint components could remain on the surface for a long time compared to porous surfaces, latent fingerprints could be expressed over time.

소수성으로 표면 개질된 형광성 양자점 나노 물질의 법과학적 잠재지문 현출 적용 연구

오상재(Oh, Sang Jae),유승진(Ryu, Seung Jin) 경찰대학 경찰학연구편집위원회 2021 경찰학연구 Vol.21 No.3

지문은 개인식별을 위해 중요한 생물학적 유래의 형태 증거로, 특히 범죄 현장에 유류되어 존재하나, 육안으로 식별되지 않는 잠재지문의 현출은 사건 해결에 결정적으로 기여할 수 있는 중요한 법과학적 분석기법이다. 특히 특정 파장의 빛과 반응하는 형광물질을 사용한 형광 분말법은 비다공성 표면에서 표면과의 대비를 극대화시키는데 효과적이라고 알려져 있다. 본 연구에서는 형광 특성을 갖는 양자점(Quantum Dots)을 물리화학적으로 안정한 실리카 물질로 1차 코팅하고, 잠재지문과 상호작용을 증대시키기 위해 표면을 다시 PVP(polyvinylprollydine)로 표면 개질하여 향상된 형광 특성과 부착 특성을 갖는 잠재지문 현출 물질을 설계하고 적용하였다. 비다공성, 반다공성 및 다공성 표면에 지문을 전사시키고 설계한 물질을 활용하여 잠재지문을 현출하였다. 또한 지문 유류 후 경과 시간에 따른 잠재지문 현출 효과를 비교하였다. 소수성 양자점 물질은 365 nm 자외선 아래 강한 형광 특성을 나타내어 비다공성, 반다공성 및 다공성 표면에서 잠재지문의 식별이 용이하였고, 특히 비다공성 표면과 반다공성 표면에서는 지문 유류 후 오랜 시간 경과에도 불구하고 증대된 흡착량을 통해 효과적으로 잠재지문이 현출되었다. 기존의 분말법으로 잠재지문의 현출이 어려운 다공성 표면에서도 향상된 부착 특성을 통해 지문 유류 후 1일(24시간) 이내에 증대된 형광 특성과 부착 특성으로 잠재지문을 현출할 수 있었다. 본 연구의 실험결과 기존 분말법과 비교하여 다양한 표면에서 형광 및 부착 특성이 증대된 잠재지문 현출 기법으로 확립이 가능할 것으로 기대된다. 또한, 잠재지문에 남아있는 특정 성분을 흡/탈착할 수 있는 특성 부여의 연구가 추가적으로 필요할 것으로 보이며, 특히 잠재지문에 남아있는 DNA 흡/탈착 특성 연구를 통해 범죄 현장의 잠재지문 증거에서 동시에 잠재지문의 현출과 추가적인 지표물질 및 개인식별 증거확보가 가능한 법과학 분석기법으로 적용 가능할 것으로 기대된다. Fingerprints are a important evidence of identifying individuals, especially the detection of latent fingerprints at crime scenes which is important investigative techniques in solving cases. Dusting powder is the simplest and most rapid development method, especially fluorescent dusting powder using certain wavelengths of light, which is known to be very effective on non-porous surfaces. In this research, Quantum Dots with fluorescence properties were coated with physically stable SiO₂, then hydrophobic orange quantum dots nanomaterials with fluorescence and hydrophobic properties were prepared by coating the surface with hydrophobic properties. To compare the development of latent fingerprints on various surfaces, groomed fingerprints were released on porous, semi-porous, and non-porous surfaces, and additionally camparing the development of latent fingerprints over time. Hydrophobic QD nanomaterials emitted strong orange fluorescence under 365 nm ultraviolet rays, making it easier to detect latent fingerprints, especially on non-porous and semi-porous surfaces, despite the long released time of fingerprint. On porous surfaces and semi-porous surfaces, which are difficult to detect latent fingerprints using conventional dusting powders, latent fingerprints could be effectively developed by using hydrophobic QD nanomaterilas. Based on the research results, it is expected to be used as an investigative technique that can detect latent fingerprints from various surfaces than conventional powder. In addition, research on DNA adsorption ability due to hydrophobic QD nanomaterials is needed, and if DNA adsorption ability is confirmed, it is expected to be used and applicable as a strong investigative technique to obtain fingerprints and DNA simultaneously.

Preparation of Granule-type Gas Filter Media containing Manganese Based Oxide Catalyst

이희숙,오상재,이학송,한양수 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0

Silica supported Mn based oxide catalysts, CuO:MnO₂, CuMn₂O₄, and Mn₃O₄, were prepared by a redox-precipitation and alkali silicate titration metod. In a typical process, nano-sized oxide particle was first prepared by a redox precipitate, followed by a basic alkali silicate (Na₂SiO₃) titration to obtain porous materials. The cylindrical-type porous pellets containing manganese based oxide catalyst were prepared by roller-dice extrusion method. The physical properties such as packing density, hardness, and porous parameters along with the gas removal performance were investigated for the pellet-type filter media. Thus prepared oxide catalyst-loaded pellets exhibited pellet hardness of 4.0 ~ 6.0 kg/cm², packing density of 0.4 ~ 0.5 g/cm³, specific surface area of 200 ~ 250 m²/g, total pore volume of 0.65 ~ 0.80 cm³/g, respectively.

Catalyst Coating on Recycled Granule-type Gas Filter Media

한양수,오상재,김세희,오세화 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0

Nano-sized metal oxide catalyst was coated on the recycled cylindrical- type porous filter media by spray coating process. Silica based porous filter media were recovered by a simple acid leaching the catalytic metal components from the used gas filter media (ExPol^TM). The residual silicate matrix obtained after acid treatment was coated again with colloidal copper-manganese oxide particles, which resulted in catalyst coated porous cylindrical-type gas filter media. The chemical compositions, porous character, and gas removal performance of the re-produced filter media were systematically compared with those of the original filter media. The newly developed recycle process enables us to make cost-effective ceramic gas filter media and provides a environmental-benign and resource-recycling production route.

Recycle Process of Granule-type Gas Filter Media containing Copper-Manganese Oxide Catalyst

한양수,오상재,김세희 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.1

Preparation of Highly Porous Granule-type Gas Filter Media containing Copper-Manganese Oxide Catalyst

한양수,오상재,김세희,오세화,배석수 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0

Highly porous cylindrical-type gas filter media containing copper-manganese oxide catalyst was prepared by roller-dice extrusion method using Cu:MnO_x/SiO₂ composite precursor, which was obtained by a redox precipitation and subsequent hydrolysis of alkali silicate solution. In a typical preparation nano-sized Cu:MnO_x particle was prepared at first by a redox reaction between Mn⁷⁺ and Cu²⁺/Mn²⁺ aqueous solution, followed by a acid-catalyzed hydrolysis of sodium silicate solution in the presence of CuMnO_x particle, leading to Cu:MnO_x/SiO₂ composite materials with very high specific surface area (S_BET) of > 650 ㎡/g and large pore volume of ~ 0.6 mL/g with the pore dimension of 3~5 nm. The physical properties such as apparent packing density, pellet hardness, and porous characters (surface area, pore volume, and pore size) along with the gas removal performance (CO, NO₂, NH₃, and CH₃CHO) were investigated in detail.

1P-466 Odorous and Hazardous Gases Removal Property of Granule-type Filter Media containing Copper-Manganese Oxide Catalyst

배석수,이석민,오상재,김세희,한양수 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1

The cylindrical-type porous pellets containing copper-manganese oxide catalyst were prepared by roller-dice extrusion method. The physical properties such as pellet density, hardness, and porous parameters along with the gas removal performance were investigated depending upon the various process parameters such as silica fillers, binders, additives, and processing parameters, etc. It was found that the newly prepared oxide catalyst-loaded pellet type granules exhibited excellent mechanical and physico-chemical properties; high pellet hardness(>4.0 kg/㎠), very low packing density (<0.4 g/㎤), large pore volume (>0.80 ㎤/g) and specific surface area (> 200 ㎡/g), respectively. It was interesting that the CO removal efficiency showed no strong correlation with porous property. In particular, the filter media using active carbon exhibited very low CO removal efficiency even though the large specific surface.

인권보호 측면에서의 법과학 감정 제도 및절차적 개선방안

유승진,김면기,오상재 충북대학교 법학연구소 2020 과학기술과 법 Vol.11 No.2

Since the results of the forensic science appraisal are used as evidence for criminal trials, credibility and validity must be guaranteed as they play an important role in determining a person's life. To this end, there is a way to ensure the reliability of the results by reducing errors in forensic science service. However, the number of emotions commissioned by the National Forensic Service increases exponentially every year, while the number of forensic scientist is overloaded due to problems such as not being met, which increases the likelihood of various errors in tests. So, it is necessary to improve the quality of emotional work, respectively, through institutional improvements such as increasing the workforce of workers and limiting the limits of forensic works per scientist. Next, due to its nature as a professional field of forensic science, forensic work is carried out, creating an imbalance between the people and investigative agencies, which could lead to a wide gap in criminal trials over whether or not they are guilty. Therefore, it is also necessary to narrow the inequality between the people and the investigative agencies by supplementing the number of people, as well as procedural and institutional supplementing them so that they can give expert witness in areas that include forensic science service, from the investigation stage to the trial stage, rather than expert witness at the trial stage. Finally, there is a lack of discussion on the ethics of forensic scientists as a special professional role compared to the profound impact of forensic science service on the lives of the people. Therefore, it is necessary to review the code of ethics abroad and establish a code of ethics that can impose practical sanctions, not just ethical norms, to raise the vigilance of forensic scientists against ethical violations.