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한국산 및 중국산 자근의 나프토퀴논계 성분비교를 통한 품질특성
김도형(Do-Hyeong Kim),정민제(Min-Je Jeong),조순현(Soon-Hyun Cho),김사현(Sa-Hyun Kim),박용주(Yong-Ju Park),양병욱(Byung-Wook Yang),고성권(Sung-Kwon Ko) 한국화장품미용학회 2020 한국화장품미용학회지 Vol.10 No.3
The naphthoquinone compound of Lithospermi Radix (Lithospermum erythrorhizon) was compared with the HPLC method to identify the ingredients of Korean and Chinese Lithospermi Radix. The naphtoquinone component of Lithospermi Radix was analyzed using HPLC method. As a result of analyzing the components of naphtoquinone derivatives of Lithospermi Radix from Yeongwol in Korea, only 95% ethyl alcohol extract was found to have naphthoquinone derivatives, and 70% ethyl alcohol, 50% ethyl alcohol, 30% ethyl alcohol, and distilled water reflux extraction extract were not identified. Meanwhile, among the ultrasonication extract of Lithospermi Radix from Korea and China, the naphthoquinone derivative showing the highest content was β-hydroxyisovaleryl shikonin, followed by the highest content in the order of isovaleryl shikonin and acetyl shikonin. The main components of Korean and Chinese Lithospermi Radix were β-hydroxyisovaleryl shikonin, isovaleryl shikonin and acetyl shikonin when ultrasonication and reflux extraction were extracted with 95% ethyl alcohol.
김인태(In-tae Kim),조대기(Dae-kee Cho),정민제(Min-je Jeong),이재원(Jae-won Lee),서혁(Hyuk Seo),유명종(Myoung-jong Yu) 한국추진공학회 2008 한국추진공학회 학술대회논문집 Vol.2008 No.5
액체추진제 추력기의 경우, 성능평가를 위해 진공연소시험이 필수적으로 요구되며 이때 공급되는 추진제의 유량이 비추력 계산시 중요한 영향을 미치는 인자가 된다. 본 논문에서는 정밀 유량측정에 대한 기초연구로서, 코리올리 유량계를 이용하여 모의추진제인 DIW를 사용한 수류시험을 수행하였으며 연속모드 및 펄스모드 각각에 대해 결과분석이 이루어졌다. 마지막으로 해외연소시험 데이터와의 비교를 통해 수류시험 결과와의 검증을 확인하였다. For the performance evaluation of liquid mono-propellant thruster, Vacuum Hot-fire test is necessarily required. An accurate flow measurement is one of the key parameters to the successful T&E program. This paper describes the characteristics of the coriolis flowmeter, explains the cold-flow test using simulant propellant (DIW), and presents the test results. Finally, the cold test results have been verified in comparison with the hot-fire test data.