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Angelica keiskei의 고지혈증 개선효과 및 2종의 플라본 7-O-배당체의 분리
박종철,조영숙,박석규,박정로,전순실,옥광대,최종원,Park, Jong-Cheol,Cho, Young-Sook,Park, Seok-Kyu,Park, Jeong-Ro,Chun, Soon-Sil,Ok, Kwang-Dae,Choi, Jong-Won 한국생약학회 1995 생약학회지 Vol.26 No.4
Two flavone glycosides were isolated from the aerial part of Angelica keiskei Koidz and identified by means of spectral analysis as luteolin-$7-O-{\beta}-{_D}-glucoside$ and Iuteolin-7-O-rutinoside. Intraperitoneal administration of methanolic extract(100mg/kg) and $luteolin-7-O-{\beta}-{_D}-glucoside(5mg/kg)$ isolated from this plant produced a significant hypolipemic activity.
박종철,Park, Jong-Cheol 한국식품연구원 2008 한맛한얼 Vol.1 No.2
미국, 중국, 일본에서 부는 김치 열풍은 연예인들의 한류열풍 못지않다. 이제 김치는 세계인의 건강을 지켜주는 헬스 푸드로 당당하게 자리매김을 했다. 특히 갈비나 비빔밥 등과 함께 김치는 외국인의 입맛을 사로잡는 데 한몫을 톡톡히 하고 있다. 중국 대륙의 김치 열풍을 현지에서 촬영한 사진을 통해 살펴본다.
꾸지뽕나무 잎, 열매, 줄기 및 뿌리의 분획물 과 플라보노이드 화합물이 흰쥐의 과산화지질 함량에 미치는 영향
박종철,최재수,최종원,Park, Jong-Cheol,Choi, Jae-Sue,Choi, Jong-Won 한국생약학회 1995 생약학회지 Vol.26 No.4
We studied the effects of the methanolic extracts and fractions from leaves, fruits, stems and roots of Curadrania tricuspidata on the formation of lipid peroxide. The methanol extracts of leaves, fructus and stem of this plants decreased the formation of lipid peroxide in the isolated rat liver. The ethyl acetate fraction of leaves and n-butanol fraction of stems reduced the lipid peroxide formation. It showed that arthocarpesin, one of the constituents isolated from this plant, lowered the formation of lipic peroxide by 13%, 21%, 22% and 25% at the concentration of $10^{-8},\;10^{-6},\;10^{-4}\;and\;10^{-2}mg/ml$, respectively.
고 전력 RF-Filter의 수동혼변조 저감방안에 대한 연구
박종철,이강훈,이영철,Park, Chong-Chul,Lee, Kang-Hoon,Rhee, Young-Chul 한국전자통신학회 2008 한국전자통신학회 논문지 Vol.3 No.4
본 연구에서는 고출력 RF 필터의 도금상태에 따른 수동혼변조왜곡(PIMD)을 측정하였으며 RF-filter의 PIMD를 저감시키기 위한 방안을 제시하였다. PIMD의 표준측정방안에 따라 Wibro 중계기용 고출력 RF-필터의 PIMD 특성를 측정하였다. Wibro용 고 전력-RF 필터의 설계에서 통과대역의 에지(edge)에서 삽입손실 및 지연 특성의 평탄도가 저하될 경우, PIMD의 발생되므로 본 연구에서는 고 전력 필터의 PIM을 감소시키기 위하여 필터의 내부 도금 재료의 종류와 방안을 제시하였다. In this paper, the Passive Intermodulation Distortion(PIMD) of high power RF Filter is measured with filter inner coating materials and we suggest how to reduced the PIMD of RF filter coating methods. According to the standard measurement regulation by IEC, the Passive Intermodulation Distortion of Wibro relay high power filter are measured. We suggest the coating materials and coating methods of high power filter inner structure to reduce the PIMD generating by insert loss and worse flatness of filter delay in the design of Wibro high power filter efficiently.
박종철,박성식,윤재룡,Park, Jong-Chul,Park, Sung- Sik,Yoon, Jae-Rhyong 한국현미경학회 1998 Applied microscopy Vol.28 No.1
Ultrastructural study of the development of the atrioventricular (AV) node was studied by electron microscopy in human fetus ranging from 30 mm to 260 mm crown rump length, and compared with human adult. By 30 mm fetus, the right AV nodal primordium was located below the attachment of the right venous valve. The left AV nodal primordium was observed below the attachment of septum primum. The cytoplasm of the nodal primordia contained few mitochondria, and myofibrils. These cells were apposed to each other with occasional desmosomes. In 40 mm fetus, the AV node cells were poorly organized myofibrils, while working myocardial cells were well organized myofibrils with sarcomere. At 70 mm fetus, intercalated discs were developed in the working myocardial cells. At 100 mm fetus, the nodal cells contained a relatively clear cytoplasm with a few groups of myofibrils and mitochondria. By $140\sim200$ mm fetuses, the nodal cells were an increasing number of myofibrils and mitochondria and these were scattered throughout the cytoplasm. At 260 mm fetus, the nodal cells were small and contained a clear cytoplasm with sparse and poorly organized myofibrils and mitochondria. All major ultrastructural features which characterize the adult AV nodal cells were found in this stage. The working myocardial cells were larger and had a more compact cytoarchitecture than nodal cells. Zonula adherens or fasciae adherens type junction were not found between nodal cells, but they frequently observed between nodal and working myocardial cells.
산소결핍 탄탈륨 산화물을 활용한 탄탈륨 산질화물 및 질화물 합성
박종철,피재환,김유진,최의석,Park, Jong-Chul,Pee, Jae-Hwan,Kim, Yoo-Jin,Choi, Eui-Seock 한국분말야금학회 2008 한국분말재료학회지 (KPMI) Vol.15 No.6
Colored tantalum oxy-nitride (TaON) and tantalum nitride ($Ta_{3}N_{5}$) were synthesized by ammonolysis. Oxygen deficient tantalum oxides ($TaO_{1.7}$) were produced by a titration process, using a tantalum chloride ($TaCl_5$) precursor. The stirring speed and the amount of $NH_{4}OH$ were important factors for controling the crystallinity of tantalum oxides. The high crystallinity of tantalum oxides improved the degree of nitridation which was related to the color value. Synthesized powders were characterized by XRD, SEM, TEM and Colorimeter.
박종철,Park, Jong-Chul 대한설비공학회 1989 설비저널 Vol.18 No.2
액체헬륨온도(4.2K)를 얻을 수 있는 극저온 소형 냉동기 개발과 정밀측정(전류, 자장, 전압 등)에 사용되고 있는 dc SQUID(초전도 양자간섭장치) 제작에 관하여 설명하였다. 이와 아울러 극저온 연구가 첨단과학 및 산업에 어떻게 응용하고 있는가와 국내외 연구현황에 대하여 간단히 기술하였으며 앞으로의 대책에 관하여 논의한다.