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한국형 발사체 추진기관 공급계용 대형 배관 제작 가능성 확인을 위한 배관 시편 제작 및 성능 평가
박형근(Hyoungkeun Park),조황래(Hwangrae Cho),방정석(Jeongsuk Bang),이병호(Byungho Rhee),조영훈(Yeonghoon Cho),박승용(Seungryong Park),이한주(Hanju Lee) 한국추진공학회 2012 한국추진공학회 학술대회논문집 Vol.2012 No.11
본 연구에서는 다양한 발사체 추진기관 공급계 배관 자재 중 STS 300 계열의 금속보다 강도가 높고 용접성이 우수할 것이라고 판단되는 21-6-9 합금소재를 이용하여 산화제 주배관의 시편을 제작하였다. 제작된 시편은 내압 시험을 수행하여 요구되는 내압 강도를 유지할 수 있는지를 확인하였다. This article deals with the manufacturing and performance evaluation on the specimen pipes which have large size diameter and thin thickness. This specimen is for LOX main pipe of KSLV-II propulsion feeding system. The material of specimen is 21-6-9 alloy. 21-6-9 alloy has higher strength and better weldability rather than STS-300 class pipes. We found that the specimen using 21-6-9 alloy satisfied the requirement by pressurization tests.
식품 내 벤조피렌 분석법의 기존 연구동향 및 라만분광법 기반기술 전망
이미현 ( Mihyun Lee ),이소윤,김현연 ( Xuanyan Jin ),최대식 ( Daesik Choi ),이한주 ( Hanju Rhee ),이진규 ( Jinkyu Rhee ) 한국미생물생명공학회(구 한국산업미생물학회) 2015 한국미생물·생명공학회지 Vol.43 No.3
With a view to supporting the provisions of the current Korean food code for the detection of Benzo[a]pyrene, various analytical methods of detection in foods were evaluated and established in terms of linearity, limits of detection/quantitation, efficiency, and accuracy, amongst others. It was observed that to improve the technologies involved in the application of these methods, complicated and combined preparation processes of foods, including extraction, separation and purification, have been the main focus of efforts at optimization. Recently, on-site quick reaction for the detection of hazardous substances in the environment and food materials aims at developing simplified examination processes, such as lable-free and non-invasive technological analysis, to reduce the costs and time involved in the examination. Herein, current benzo[a]pyrene detection methods are reviewed in addition to new Raman spectroscopy-based trials established to pursue improve the speed, simplicity and suitability of testing.