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박종철,박수훈,조순철,Park, Jong-Cheol,Park, Su-Hun,Jo, Sun-Cheol 대한전자공학회 1994 전자공학회지 Vol.21 No.8
정보화 시대의 도래를 맞아 정보 기록기기는 눈부실 정도로 비약적으로 발전하고 있다. VTR, 오디오 그리고 HDD 및 FDD 등 정보 기록기기의 고밀도화, 고성능화에 견인 역할을 하고 있는 부품이 바로 자기헤드이다. 본고에서는 각 용도별로 사용되는 자기 헤드의 종류, 개발연혁, 기술개발 동향 및 전망을 소개한다.
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.
Acetaminophen으로 유도한 쥐의 간 독성에 대한 미나리(Oenanthe javanica) 추출액의 간 보호 작용
박종철,김종연,이윤주,이지선,김보금,이승호,남두현,Park, Jong-Cheol,Kim, Jong-Yeon,Lee, Youn-Ju,Lee, Ji-Seon,Kim, Bo-Geum,Lee, Seung-Ho,Nam, Doo-Hyun 대한약학회 2008 약학회지 Vol.52 No.4
The hepatoprotection by the methanol extract of Oenanthe javanica DC (water dropwort) (OJME) was investigated in Sprague Dawley rats with inducing liver damage by acetaminophen. After OJME administration for 1 week, the increase of hepatic lipid peroxide level by acetaminophen-induced hepatotoxicity was significantly reduced. In case of phase I microsomal enzyme systems including cytochrome P-450, aminopyrine N-demethylase and aniline hydroxylase, any significant differences between in control and in OJME-pretreated group was observed after acetaminophen treatment. However, the pretreatment of OJME maintained the hepatic glutathione level and the activity of liver cytosolic glutathione S-transferase, which was significantly decreased by the acetaminophen intoxication. Among the glutathione-generating system, glutathione reductase was more responsible for its biosynthesis rather than ${\gamma}-glutamylcystein$ synthetase. OJME itself showed the strong inhibition activity on DPPH radical generation. In conclusion, OJME administration maintains the liver glutathione pool and hepatic glutathione S-transferase activity, in addition with its high anti-oxidative capability, to show hepatoprotective effect from acetaminophen intoxication.
멀티주파수 초음파를 사용하는 피부 치료기기 트랜스듀서의 효율적인 주파수 제어 연구
박종철,김민성,Park, Jong-Cheol,Kim, Min-Sung 한국멀티미디어학회 2022 멀티미디어학회논문지 Vol.25 No.8
Ultrasound is one of the effective methods for skin treatment. The skin penetration depth of the ultrasound depends on the ultrasonic frequency, that is, when the ultrasonic frequency is high, the depth is shallow. We have developed a transducer which can generate effectively 3 different ultrasonic frequencies removing interference between 3 types of frequencies according to impedance matching technology. The generated powers of transducer are 40.67W at 3.MHz, 17.46W at 11.7 MHz, and 14.79W at 21.5 MHz. The signal interference between the three frequencies is designed so that they do not interfere with each other by separating the signals using the SPDT (Single Pole, Double Throw) switch. The developed hybrid ultrasound transducer can be applied in skin care or skin treatment and beauty therapy.
박종철,Park, Jong-Cheol 선박안전기술공단 2004 선박안전 Vol.15 No.-
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