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최근표,서정길,김상무,CHOI Geun-Pyo,SEO Jung-Gil,KIM Sang-Moo 한국수산과학회 2003 한국수산과학회지 Vol.36 No.4
Antioxidative activities of low molecular weight biocompounds purified from anchovy (Engraulis japonicus) sauce fermented at $15\pm3^{\circ}C$ for 5 years were investigated. The fermented anchovy sauce showed 5 peaks on gel chromatography pattern. Antioxidant activity of peak 2 was $82.7\%$ followed by $42.6\%$ of peak 1. Main antioxidant compounds of peak 1 were glutamic acid and lysine, but those of peak 2 were not confirmed by amino acid sequence analysis.
조희근(Hee-Keun Cho),서정기(Jung-Ki Seo),김병중(Byoung-Jung Kim),장태성(Tae-Seung Jang),차원호(Won-Ho Cha),이대길(Dai Gil Lee),명로훈(Noh-Hoon Myung) 한국항공우주학회 2010 韓國航空宇宙學會誌 Vol.38 No.7
과학기술위성 3호는 국내 최초의 전구조 복합재 위성이다. 이전에 개발된 위성은 대부분 태양전지판 등 부분적인 복합재 구조로 된 것도 있으나 전 구조 복합재 위성은 개발된 적이 없었다. 본 연구는 소형 복합재 위성의 버스 구조체 개발을 위한 복합재 응용 설계 및 제작 기술의 적용과 그 활용에 중점을 두고 있다. 특히 과학기술위성 3호의 버스 구조체는 이전에 개발된 위성의 구조체 와는 전혀 다른 형태로 개발되었다. A satellite that has an all-composite structure, STSAT-3(science and technology satellite), was initially developed in Korea. Partially use of advanced composites in space applications such as solar panel is well developed, however the application of an all-composite satellite bus has never been achieved in Korea. This study emphasizes the application of composite technology to the design and fabrication of an all-composite spacecraft bus for small-class satellite STSAT-3. Moreover its structure design concept is totally different from the one that was used in the previous satellites developed in Korea.
공업화학(전기화학, 분석화학 포함) 촉매/반응공학 란탄 기반 페롭스카이트 촉매를 이용한 악취 유발 물질의 저온 산화 반응
방용주 ( Yong Ju Bang ),서정길 ( Jeong Gil Seo ),이기춘 ( Gi Chun Lee ),박찬정 ( Chan Jung Park ),김형태 ( Hyung Tae Kim ),송인규 ( In Kyu Song ) 한국화학공학회 2011 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.49 No.2
Various La-based perovskite catalysts were prepared by a Pechini method, and they were applied to the low-temperature oxidation of odor compounds exhausted from waste food treatment process for effective deodorization. Quantitative and qualitative analyses of exhausted gas were conducted to measure the amount of major odor compounds with respect to operation time. A standard odor sample composed of major odor compounds was then prepared for use as a feed for oxidation reaction system. Various transition metal(M)-substituted La-based perovskite catalysts (LaMO3: M=Cr, Mn, Fe, Co, and Ni) were prepared and applied to the oxidation of odor compounds in order to investigate the effect of transition metal M. Among the catalysts tested, LaNiO3 catalyst showed the best catalytic performance. Pt-substituted perovskite catalysts (LaNi1-xPt03: x=0, 0.03, 0.1, and 0.3) were then prepared for enhancing the catalytic performance. It was found that LaNi0.9Pt0.1O3 catalyst served as the most efficient catalyst. Supported perovskite catalysts (XLaNi0.9Pt0.1O3/Al2O3: X=perovskite content(wt%), 0, 10, 20, 30, 40, 50, and 100) were finally applied for the purpose of maximizing the catalytic performance of perovskite catalyst in the low-temperature oxidation reaction. Catalytic performance of XLaNi0.9Pt0.lO3/Al2O3 catalysts showed a volcano-shaped curve with respect to perovskite content. Among the catalysts tested, 20LaNi0.9Pt0.1O3/A12O3 catalyst exhibited the highest conversion of odor compounds of 88.7% at 180℃.