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만성 B형간염 환자에서 hepatitis B core antigen의 발현과 분포 위치에 따른 라미부딘의 치료 반응
시계동 ( Kyeh Dong Shi ),황성규 ( Seong Gyu Hwang ),최주현 ( Ju Hyun Choi ),황일준 ( Il Joon Hwang ),윤재호 ( Jai Ho Yoon ),김광일 ( Kwang Il Kim ),권창일 ( Chang Il Kwon ),홍성표 ( Suang Pyo Hong ),박필원 ( Pil Won Park ),임규성 대한간학회 2008 Clinical and Molecular Hepatology(대한간학회지) Vol.14 No.2
Yoo, Mi Young,Oh, Kwang-Seok,Lee, Jung Won,Seo, Ho Won,Yon, Gyu Hwan,Kwon, Dae Young,Kim, Young Sup,Ryu, Shi Yong,Lee, Byung Ho Heyden & Son 2007 Phytotherapy research Vol.21 No.2
<P>The vascular relaxant effect of the rhizome extract of Rheum undulatum was evaluated with isolated rat thoracic aorta preparations. The methanol extract of the rhizome induced a concentration-dependent relaxation of aortic preparations precontracted with 0.3 µm phenylephrine (EC<SUB>50</SUB> value: 5.8 µg/mL). The activity-guided fractionation of the extract led to the isolation of seven hydroxystilbene components as active principles, i.e. piceatannol, resveratrol, desoxyrhapontigenin, rhapontigenin, piceid, rhaponticin and ϵ-viniferin. Of these, piceatannol, a tetrahydroxystilbene, exhibited the most potent vascular relaxant effect in rat aortic preparations (EC<SUB>50</SUB> value 2.4 µm). The vasorelaxant effect of piceatannol on endothelium-intact aorta rings was diminished completely by the removal of functional endothelium or by pretreatment of the aortic tissues with N<SUP>G</SUP>-nitro-l-arginine methyl ester. These results suggest that piceatannol may be the major mediator responsible for the vasorelaxing properties of the rhizome extract of Rheum undulatum and the vasorelaxant effects of the piceatannol may be mediated via endothelium-dependent nitric oxide signaling pathway. Copyright © 2006 John Wiley & Sons, Ltd.</P>
Implementation of A 30-Channel PCM Telemetry Encoder with A TMS320F2812 DSP Chip
김정섭,장명진,시광규,Kim Jung-Sup,Jang Myung-Jin,Shi Kwang-Gyu The Korean Institute of Communications and Informa 2006 韓國通信學會論文誌 Vol.31 No.9A
There are three critical considerations in developing a PCM telemetry encoder to be installed in an artillery projectile. The first is the performance consideration, such as sampling rate and data transmission rate. The second is the size consideration due to the severely limited installation space in an artillery projectile and the last is the power consumption consideration due to limitations of the munition's power supply. To meet these three considerations, the best alternative is a one-chip solution. Using a commercially available TMS320F2812 DSP, we have implemented a 30-channel PCM telemetry encoder to process randomized data frames, composed of 16-channel analog data, 14-channel digital data and 2-frame synchronization channels per data frame at 10Mbps transmitting baud rate. Artillery projectile에 장착될 PCM 텔레메트리 엔코더 개발에는 크게 세 가지 고려사항이 요구된다. 첫 번째는 샘플링률과 데이터 전송률과 같은 성능에 대한 것이다. 두 번째는 제한된 설치 공간에 따른 크기에 대한 것이고 마지막은 munition의 제한된 전원 공급에 따른 전력 소모에 대한 고려이다. 이러한 세 가지 조건에 맞는 해결책은 한 개의 칩으로 구현하는 것이다. 상용인 TMS320F2812 DSP 칩을 이용해서 프레임당 16채널 아날로그 데이터, 14채널 디지털 데이터와 2개의 프레임 동기 데이터를 랜더마이즈시켜 10Mbps 전송률로 송신하는 30채널 PCM 엔코더를 설계 구현하였다.