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

  • Kim, Young Ho;Kim, Gyu-Man;Dang, Trung Dung;Choi, Jin Ho;Kim, Hwan-Gon;Park, Sangju;Lee, Sang Hak
    • Applied Chemistry
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    • v.15 no.1
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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.

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

  • Lee, Sang Hak;Kim, Kyung Min;Hong, Suk Joo;Kim, Gyu-Man;Jo, Hae Jin;Jang, Taek Gyun;Kim, Young Ho
    • Applied Chemistry
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    • v.15 no.2
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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.

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

  • John Baek;Jongmin Park;Byunggeon Park;Jae-Kwang Lim;Chun Geun Lim;An Na Seo
    • Journal of the Korean Society of Radiology
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    • v.84 no.6
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    • pp.1373-1377
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    • 2023

  • Immunoglobulin G4 (IgG4)-related lung disease can have various clinical courses. To our knowledge, reports of IgG4-related lung disease with waxing and waning pulmonary infiltrates only are very rare. A few lung nodules and ground glass opacities were incidentally found in a pre-operative evaluation in a 36-year-old female. The lung lesions showed waxing and waning in the follow-up chest CT. She underwent a surgical biopsy, and IgG4-related lung disease was confirmed.

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