http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김중배,방병호,Kim, Jung-Bae,Bang, Byung-Ho The Korean Society of Food and Nutrition 2014 韓國食品營養學會誌 Vol.27 No.3
황백(Cortex Phellodendri: CP)은 황벽나무(Phellodendron amurense)의 건조된 수피로부터 얻어진다. 이 수피는 한국의 전통 한약제로서 설사, 황달, 무릎과 발의 통증, 요도관 및 피부 감염증에 폭넓게 사용되어 왔다. 이들 기능성 성분의 분리 및 정제는 박층 크로마토크래피, 컬럼 액체 크로마토크래피 및 HPLC와 같은 여러 분석법들이 동양의 약초연구에 이용되어 왔다. 본 연구는 CP로부터 berberine을 분리하기 위해 향류분배 크로마토크래피법(CPC)으로 효과적으로 수행하였다. 두 용매의 CPC 최적조성은 n-butanol: acetic acid: water(4:1:5 v/v/v)이었다. 이동상의 유속은 1,000 rpm 회전력에서 상승법으로 분당 3 mL 속도로 전개시켰다. CPC에서 분리된 분획분은 prep-HPLC로 정제하였다. $^1H$-NMR 스펙트럼은 4.10과 4.20 ppm에서 $3H(-OCH_3)$, 6.10 ppm에서 2H의 ($-OCH_2O-$) proton signal의 공명이 관찰되었다. 2개의 방향족 proton은 이중결합 패턴을 보였다. H-11과 H-12 doublet은 각각 7.98과 8.11에서 나타났다. $^{13}C$-NMR 스펙트럼에서는 C2와 C3의 methylenedioxy group($-OCH_2O-$), C9과 C10에 methoxy group($-OCH_3$)이 4개의 치환된 형태로 보였다. 분리 정제된 berberine의 화학구조는 $^1H$, $^{13}C$-NMR, ESI-MS 데이터 분석으로 확인하였다. Cortex Phellodendri (CP) is derived from the dried bark of Phellodendron amurense. It has been widely used as a drug in traditional Korea medicine for treating diarrhea, jaundice, swelling pains in the knees and feet, urinary tract infections, and infections of the body surface. Many analytical methods have been used to study oriental herbal medicines, such as thin-layer chromatography, column liquid chromatography, and high performance liquid chromatography (HPLC). In this study, preparative centrifugal partition chromatography (CPC) was successfully carried out in order to separate pure compounds from a CP methanol extract. The optimum two-phase CPC solvent system was composed of n-butanol: acetic acid: water (4:1:5 v/v/v). The flow rate of the mobile phase was 3 mL/min in ascending mode with rotation at 1,000 rpm. The CPC-separated fraction and purification procedures were carried out by preparatory HPLC. The $^1H$ NMR spectrum revealed that the resonances at ${\delta}$ 4.10 and 4.20 ppm corresponded to three protons ($-OCH_3$), whereas those at ${\delta}$ 6.10 ppm corresponded to two protons ($-OCH_2O-$). Further, two aromatic protons (H-11 and H-12) conveys a doublet-doublet pattern. The H-11 doublet and H-12 doublet appear at ${\delta}$ 7.98 and 8.11, respectively. The $^{13}C$ NMR. spectrum showed a tetrasubstituted with a methylenedioxy group at C2 and C3, and two methoxy groups at C9 and C10. The chemical structure of the berberine was identified by $^1H$, $^{13}C$-nuclear magnetic resonance and electrospray ionization-mass spectroscopy spectral data analysis.
노즐 챔버 형상이 부족팽창 스월제트 유동에 미치는 영향에 관한 연구
김중배(Jung-Bae Kim),이권희(Kwon-Hee Lee),토시아키 세토구치(Toshiaki Setoguchi),김희동(Heuy-Dong Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
The present study addresses experimental results to investigate the effect of the jet supply chamber<br/> configuration on the sonic/supersonic swirling jets, as the case study. The experiment is carried out using the<br/> convergent nozzle with a various different chamber configurations upstream the nozzle throat, which is<br/> composed of four tangential inlet holes for the swirling flows. The jet pressure ratio is varied between 3.0 and<br/> 7.0. The sonic/supersonic swirling jet flows are specified by the pitot impact and static pressure measurements<br/> and visualized using the Shadowgraph method. The results show that the major structures of the<br/> sonic/supersonic swirling jet are strongly influenced by the jet supply chamber.
김중배(Jung-Bae Kim),이권희(Kwon-Hee Lee),토시아키 세코구치(Toshiaki Setoguchi),김희동(Heuy-Dong Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
The present study addresses experimental results to investigate the details of the near field flow structures<br/> produced in the under-expanded, dual, coaxial, swirling, jet. The sonic/supersonic swirling jets are emitted<br/> from the sonic inner nozzle and the outer annular nozzle produce the co-swirling and counter swirling against<br/> the primary swirling jet, respectively. The interactions between both the secondary annular swirling and<br/> primary inner supersonic swirling jets are quantified by the pitot impact and static pressure measurements and<br/> visualized by using the Schliern optical method. The experiment is performed for different swirl intensity and<br/> pressure ratio. The results obtained show that the secondary co-swirling jet significantly changes the inner<br/> under-expanded swirling jet, such as the recirculation zone, pressure distribution, through strong interactions<br/> between both the swirling jets and the effects of the secondary counter-swirling jet is similar to the secondary<br/> co-swirl jet case.
김중배(Jung-Bae Kim),김희동(Heuy-Dong Kim),이권희(Kwon-Hee Lee),세토구치(T. Setoguchi) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
The supersonic swirl jet is being extensively used in many diverse fields of industrial processes since<br/> those lead to more improved performance, compared with the conventional supersonic no swirl jet. In the<br/> present study, an experiment is carried out to investigate the effect of annular swirl jet on the supersonic dual<br/> coaxial jet. A convergent-divergent nozzle with a design Mach number of 1.5 is used for the supersonic<br/> primary jet, and the sonic nozzles with four tangential inlets are used to make the secondary swirl jet. The<br/> primary jet pressure ratio is varied in the range from 3.0 to 7.0 and the outer annular jet pressure ratio is from<br/> 1.0 to 4.0. The interactions between the annular swirl and the inner supersonic jet are quantified by the pitot<br/> impact and static pressure measurements and visualized by using the Schlieren optical method. The results<br/> show that annular swirl jet alters the shock structure and impact pressure distributions compared with no swirl<br/> jet.