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백서 심근경색모델에서 시간경과와 경색의 크기에 따른 심자도의 변화
김미성(Mi Sung Kim),박영선(Young Sun Park),권순길(Sun Gil Kwon),지정훈(Jeong Hoon Ji),신종성(Jong Sung Shin),오광식(Kwang Sik Oh),양용모(Yong Mo Yang),연태진(Tae Jin Youn),김동운(Dong Woon Kim),조명찬(Myeong Chan Cho),이용호(Yong Ho 대한내과학회 2002 대한내과학회지 Vol.62 No.1
N/A Background: Magnetocardiogram (MCG), which records the changes of magnetic fields generated by the heart`s electrical activity, theoritically can provide unique data for clinical application. To date, MCG has been investigated only at a single time point after myocardial infarction (MI) with severe left ventricular dysfunction in rats. The purpose of the present study was to investigate sequential changes of MCG after MI and to evaluate effects of infarct size on MCG. Methods: Acute MI were induced by the permanent ligation of left coronary artery in 22 rats. Magnetic fields were recorded just above a rat with Nb Superconducting Quantum Interference Device (SQUID) gradiometer inside a magnetically shielded room. MCG was measured before and immediately after surgery and it was subsequently recorded at the time points of 1, 4 and 6 hours post operatively. MCG was also measured at 1, 3, 7 and 21 days after surgery. Results: Elevation of ST segment and appearance of pathological Q wave on the MCG were evident immediately after the ligation of coronary artery and persisted to 6 hours after MI. On MCG, ST segment was depressed and T wave was inverted from 1 day after MI. In rats with small-and moderate- sized MI (infarct size〈30%), ST depression returned to near the isoelectric level and Q wave disappeared from 7 days after MI. However, ST depression and Q wave were still present in rats with larger infarct (infarct size≥30%). Conclusion: Evolutional changes of MCG were well-recognized up to 21 days after MI. Furthermore, the infarct size can be expressed by the extent of Q wave and ST segment depression on MCG. Taken together, these data indicate that MCG is a helpful modality for the diagnosis, evaluation of infarct size and follow up after MI.(Korean J Med 62:42-48, 2002)
지정훈(Jeong Hoon Ji),이태원(Tae Won Lee),박영선(Young Sun Park),최기원(Ki Won Choi),김혜영(Hye Young Kim),박선미(Sun Mi Park),채희복(Hoe Bok Chai),엄재호(Jae Ho Um),윤세진(Sei Jin Youn) 대한소화기기능성질환·운동학회 2001 Journal of Neurogastroenterology and Motility (JNM Vol.7 No.1
N/A Background/Aims: The changes in an Electrogastrography (EGG) in uremic patients on maintenance hemodialysis with dyspeptic complaints are not well known. The aim of this study was to investigate the EGG findings in uremic patients with dyspeptic complaints and note the difference of EGG findings between uremic patients with dyspeptic complaints and patients with functional dyspepsia. Methods: Fifty two subjects were enrolled. They were assigned to: group I, healthy volunteers without dyspeptic complaints (n=15); group II, patients with dysmotility-like dyspepsia (n=22); or group III, uremic patients undergoing hemodialysis with dysmotility-like dyspepsia (n=15). The data was compared among groups. Results: There was no difference in the percentage of normal slow wave frequency, and fed to fasting power ratio among the groups. However, frequencies of abnormal EGG findings were 4 (27%) in group I, 10 (40%) group II and 9 (60%) in group III. Therefore the frequency was marginally different among group I, group II or group III (p=0.06). Conclusions: Impaired gastric myoelectric activity was more frequently observed in uremic patients or patients with dysmotility-like dyspepsia than normal controls. However frequencies of abnormal EGG findings between uremic patients and patients with dysmotility-like dyspepsia were not significantly different. (Korean Journal of Gastrointestinal Motility 2001;7:47-55)
Gaschromatography를 利用한 Infrared Spectrophotometer用 試料製法에 關한 硏究
朴英宣,朴光潤 忠州大學校 1973 한국교통대학교 논문집 Vol.6 No.-
It is a very difficult study to get the pure components out of the substance containing isomer. But it is true that if we use the analyzers(GC & IR) together, we can find the pure components in such cases. For studying on this problem. I have tired to experiment the separation and compound of isomer with FC and IR. And so I could separate o-, m-, p-form from xylene, cis-, trans-form from dichloroethylene, and synthetic deuterium compounds.