• 제목/요약/키워드: 경북

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자외선 경화 하이드로겔을 사용한 일회용 빛 노출 검출 키트의 제조와 특성분석 (Fabrication of Disposable Light Exposure Detector Kit using UV Curable Hydrogels)

  • 김영호;김규만;;최진호;김환곤;박상주;이상학
    • 응용화학
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    • 제15권1호
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    • pp.17-20
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    • 2011

  • A disposable light exposure detector kit has been developed by UV curing of a hydrogel material. The devised light exposure detector kit consisted of light sensitive structures, bottom plate, character sheet and sticky back plate. A light exposure detector kit has a serial light sensitive structures that contain various light sensitive dyes such as rhodamine and fluorescein. The light sensitive structure composed of UV curable hydrogel polymer material as a supporing material and photosensitive dye in a certain concentration. The fabrication procedure of the ligh exposure detector kit is very simple and fast due to UV curing procedure of a photopolymerizable hydrogel material such as poly(ethylene glycol) methyl ether acrylate (PEGMEA) and poly(ethylene glycol) diacrylate (PEGDA) with a photosensitive dye. By the proposed fabrication method, various size and shape of a light exposure detector kit could be fabricated using a flexible elastomer mold. Due to a fast and inexpensive fabrication method, the light exposure detector kit could be use a single use for various industrial applications. According to light irradation, the light sensitive structure on a light exposure detector kit could be lose its color by decomposition of a photosensitive dye chemical in the structure. Thus the amount of the exposed light on a substrate could easily be recognised by changing color or transparency of the structure.

Fe(II)-DTPA 착물의 촉매작용을 이용한 루미놀 화학발광 시스템의 선택적 Fe(II) 정량 (A Selective and Sensitive Determination Method of Fe(II) ion using DTPA in Luminol-H2O2 System)

  • 이상학;김경민;홍석주;김규만;조해진;장택균;김영호
    • 응용화학
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    • 제15권2호
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    • pp.113-116
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    • 2011

  • A sensitive and selective determination method of Fe(II) ion by luminol-H2O2 system using a chelating reagent has been presented. A metal ion-chelating ligand complex such as Fe(II)-diethylenetriamine pentaacetic acid (DTPA) produced higher chemiluminescence (CL) intensity as well as longer lifetime in luminol-H2O2 system than metal exist as free ions. Furthermore, the catalytic activity of Cu(II) and Pb (II) complexes with chelating reagents in luminol-H2O2 system was lost since chelating reagents act as a masking agent although free Cu(II) and Pb(II) ions have high catalytic activity. On the optimized conditions, the calibration curve of Fe(II) ion was linear over the range from 1.0×10-7 to 2.0×10-5 M with correlation coefficient of 0.996. The detection limit was calculated to be 4.0×10-8 M.

호전과 악화를 반복하는 폐 병변을 가진 면역글로불린 G4 관련 폐 질환: 증례 보고 (Immunoglobulin G4-Related Lung Disease with Waxing and Waning Pulmonary Infiltrates: A Case Report)

  • 백요한;박종민;박병건;임재광;임춘근;서안나
    • 대한영상의학회지
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    • 제84권6호
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    • pp.1373-1377
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    • 2023

  • 면역글로불린 G4 (immunoglobulin G4; 이하 IgG4) 관련 폐 질환은 다양한 임상 경과를 가질 수 있다. 우리가 아는 한, 호전과 악화를 반복하는 폐 침윤을 동반한 IgG4 관련 폐 질환의 단독 보고는 매우 드물다. 36세 여성이 수술 전 평가에서 폐에 결절성 및 둥근 모양의 간유리음영을 발견했다. 폐 병변은 후속 흉부 컴퓨터 단층 촬영에서 호전과 악화를 반복하였다. 병변은 수술 후 IgG4 관련 폐 질환으로 확인되었다.

  • https://doi.org/10.3348/jksr.2022.0172 인용 PDF

어린이 부비동 엑스선 검사에서 검사자의 갑상선 차폐 효과성에 관한 연구 (Study on the Effectiveness of Radiological Technologist's Thyroid Shielding in Pediatric Paranasal Sinus X-ray Examination)

  • 곽창교;권정택;이광제;배일환;김혜정;이소미;이도병
    • 대한방사선기술학회지:방사선기술과학
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    • 제47권3호
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    • pp.197-203
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    • 2024

  • During paranasal sinus X-ray examinations in children, the radiological technologist's thyroid shield is often not implemented to shorten the examination time. This study measured the radiation exposure before and after the implementation of thyroid shielding by analyzing the difference in radiation exposure, the radiological technologist's could receive depending on the actual thyroid shielding. In the left TLD, when thyroid shielding was not performed(N), the radiation exposure dose(mSv) was 2.869 for the depth dose[Hp(10)] and 2.886 for the surface dose[H(3)], and when thyroid shielding was performed(Y), the Hp(10) was 0.033 and the H(3) was 0.034. In the right TLD, when thyroid shielding was not performed(N), the radiation exposure dose was 3.149 for Hp(10) and 3.137 for H(3), and when thyroid shielding was performed, the Hp(10) of (Y) was 0.013 and the H(3) was 0.015. The differences in the overall exposure dose measurement values are all statistically significant (p<0.05). The difference in radiation dose between when thyroid shielding was not performed and when thyroid shielding was performed was more than 99.2% in both cases, indicating a high radiation shielding rate.

  • https://doi.org/10.17946/JRST.2024.47.3.197 인용 PDF