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NAC-5의 Sensitizer로서의 정량적 감광특성 연구
윤세훈,오성상,이의수 한국공업화학회 2003 응용화학 Vol.7 No.1
NAC-5(Naphthoquinone-1,2-diazide sulfonyl chloride), as an additive,was applied to enhance the photosensitive rate in composing a positive type of photoresist with naphthoquinone diazide derivative. Quantitative unit of energy absorotion of NAC-5 based on molar weight using 365 nm optical pattern generator was measured to estimate the availability as a role of photoinitiator or an improvement agent for photochemical reaction. Comparing with the ester compound of NAC-5 with THBP(trihydroxybenzophenone) the rate of energy absorption of NAC-5 in the given range of UV light exposure was greater then that of THBP-ester of naphthoquinone diazide. Conclusively, NAC-5 was regarded as superior in photosensitivity.
Multidisciplinary Approach to an Extended Pressure Sore at the Lumbosacral Area
윤세훈,정의철,Hudson Alex Lázaro 대한성형외과학회 2016 Archives of Plastic Surgery Vol.43 No.6
A pressure sore wound is often extensive or complicated by local infection involving adjacent soft tissue and bone. In this case, a regional flap after simple debridement is not adequate. Here, we present a case of an extensive pressure sore in the sacral area with deep tissue infection. A 43-year-old female patient with a complicated sore with deep tissue infection had a presacral abscess, an iliopsoas abscess, and an epidural abscess in the lumbar spine. After a multidisciplinary approach performed in stages, the infection had subsided and removal of the devitalized tissue was possible. The large soft tissue defect with significant depth was reconstructed with a free latissimus dorsi musculocutaneous flap, which was expected to act as a local barrier from vertical infection and provide tensionless skin coverage upon hip flexion. The extensive sacral sore was treated effectively without complication, and the deep tissue infection completely resolved. There was no evidence of donor site morbidity, and wheelchair ambulation was possible by a month after surgery.
Malar Relocation with Reverse-L Osteotomy and Autogenous Bone Graft
윤세훈,정의철,정지혁 대한두개안면성형외과학회 2017 Archives of Craniofacial Surgery Vol.18 No.4
The zygomaticomaxillary complex (ZMC) functions as a buttress for the face and is the cornerstone to a person’s aesthetic appearance, by both setting the midfacial width and providing prominence to the cheek. Malar deficiency is often acquired by blunt injury incurred in a traumatic accident, resulting in ZMC fracture. A 48-year-old male patient presented a right ZMC fracture after contusion injury by a baseball. He only received conservative management and later he suffered discomfort during mouth opening at the moment of mastication, due to trismus involving the temporomandibular joint. In the current case, we describe a surgical technique, by which the malar body is shifted anteriorly and laterally after combined oblique-vertical osteotomy. The technique presented, eventually restored the former aesthetic position of the malar complex and symmetry, and, moreover, improved mastication function
윤세훈,김동섭,유승택,신새론,최두영 대한소아청소년과학회 2015 Clinical and Experimental Pediatrics (CEP) Vol.28 No.1
Purpose: Soluble transferrin receptor (sTfR) is a truncated extracellular form of the membrane transferrin receptor produced by proteolysis. Concentrations of serum sTfR are related to iron status and erythropoiesis in the body. We investigated whether serum sTfR levels can aid in diagnosis and treatment of iron deficiency anemia (IDA) in children. Methods: Ninety-eight patients with IDA were enrolled and were classified according to age at diagnosis. Group 1 comprised 78 children, aged 6–59 months, and group 2 comprised 20 adolescents, aged 12–16 years. Results: In group 1, patients’ serum sTfR levels correlated negatively with mean corpuscular volume; hemoglobin (Hb), ferritin, and serum iron levels; and transferrin saturation and positively with total iron binding capacity (TIBC) and red cell distribution width. In group 2, patients’ serum sTfR levels did not correlate with ferritin levels and TIBC, but had a significant relationship with other iron indices. Hb and serum sTfR levels had a significant inverse relationship in both groups; however, in group 1, there was no correlation between Hb and serum ferritin levels. In 30 patients of group 1, serum sTfR levels were significantly decreased with an increase in Hb levels after iron supplementation for 1 month. Conclusion: Serum sTfR levels significantly correlated with other diagnostic iron parameters of IDA and inversely correlated with an increase in Hb levels following iron supplementation. Therefore, serum sTfR levels can be a useful marker for the diagnosis and treatment of IDA in children.
국제핵융합실험로 (ITER) 프로젝트 연료주기 기술의 화하공학적 조망 ITER 프로젝트 - 삼중수소 연료주기 기술의 소개
윤세훈,조승연,이현곤,정기정 한국화학공학회 2015 NICE Vol.33 No.1
핵융합에너지는 미래 인류의 에너지 문제 해결을 위한 중요한 에너지원으로 부상하고 있다. 우리나라는 2003년 6월 국제핵융합실험로(ITER) 프로젝트에 정식 회원국으로 참여하게 되었다. 1995년에 개발 착수하여 2007년 개발완료하고 현재에 이르고 있는 한국형 핵융합연구로(KSTAR)의 성공적 건설과 계속되는 플라즈마 운전의 연구결과에 힘입어, 동시에 ITER 프로젝트에서 주도적 역할 수행을 통해 핵융합 분야의 기술적 입지를 점차 굳히고 있다. 그러나 정작 핵융합에너지 실용화를 위한 삼중수소 연료주기 기술의 자립은 오랫동안 연구개발을 유지해온 핵융합 선진국들에 비해 초보적 단계에 있는 편이다. 본 특별기획에서는 ITER 프로젝트의 핵심을 근간으로 하는, 핵융합에너지의 실용화를 위해 많은 기술 진척을 이룬 미국, 일본, 유럽의 핵융합 삼중수소 연료주기의 기술개발 동향과 연료주기 기술의 요소기술들을 소개함으로써 미래 핵융합에너지 연료주기기술의 완성에 필요한 기술 분야들에 대한 화학공학인들의 공감대 형성과, 또한 함께 극복해야 할 과제들을 제시하고자 한다.
윤세훈,장민호,강현구,김창석,조승연,정기정,정흥석,송규민 한국수소및신에너지학회 2012 한국수소 및 신에너지학회논문집 Vol.23 No.1
The ITER fuel cycle is designed for DT operation in equimolar ratio. It involves not only a group of fuelling system and torus cryo-pumping system of the exhaust gases through the divertor from the torus in tokamak plant, but also from the exhaust gas processing of the fusion effluent gas mixture connected to the hydrogen isotope separation in cryogenic distillation to the final safe storage & delivery of the hydrogen isotopes in tritium plant. Tritium plant system supplies deuterium and tritium from external sources and treats all tritiated fluids in ITER operation. Every operation and affairs is focused on the tritium inventory accountancy and the confinement. This paper describes the major fuel cycle processes and interfaces in the tritium plant in aspects of upcoming technologies for future hydrogen and/or hydrogen isotope utilization.