Nutcracker 증후군의 진단에 있어서 도플러 초음파검사의 유용성 : Diagnostic Usefulness of Doppler US

박병관,김승협,조정연,성창규,박선원,한만청 대한초음파의학회 1998 ULTRASONOGRAPHY Vol.17 No.2

뇌경색후 발생한 Cortical Spreading Depression과 뇌경색 범위에 관한 실험적 연구

박윤관,이승민,김세훈,이기찬,주정화,이훈갑 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.3

Cortical Spreading Depression(CSD) is a transient depression of neuronal activity that spreads across the cortical surface and is associated with profound changes in blood flow, extracellular ion concentration. Direct Current(DC) potentials and cell membrane potentials. One of the electrophysiological disturbance in the periinfarct surrounding is spontaneous occurrence of repeated CSD like DC shifts associated with increased energy demand. Due to restricted blood flow to the periinfarct border zone, elevated metabolic demand is potentially harzardous. So the authors designed this experiment to verify the correlation between periinfarct cortical spreading depression and ischemic volume following permanent middle cerebral artery (MCA) occlusion in rats. Sprague-Dawley rats(n=27) were anesthetized with 0.5∼1% halothane, and artificially ventilated through a tracheal cannula. Arterial pressure, blood gases and body temperature were controlled. The middle cerebral artery(MCA) was occluded distally to the lenticulostriate branches. Measurements of CSD activity were made for 4 hours in each animal. Infarct volume was determined 6 hours later in 2, 3, 5-triphenyl tetrazolium chloride(TTC)-stained sections. For 4 hours after MCA occlusion, the CSDs were found in all experimental animals with a range of 2∼9 times. Those CSDs wer of varying duration, : "small"(<1 min) and "big"(> 1 min) SDs and mean of total duration of SD was 10.5±10.3 min during 4 hours of MCA occlusion. Neuropathological evaluation of brain infarct in the rats, which had been allowed to survive for 6 hours after MCA occlusion showed a mean volume of 89.7±45.3㎣. Serial observation of duration of CSD showed progressive prolongation only in 8 rats. The rest of them(n=19) did not show any prolongation. Neither the prolongation of duration of CSD nor the frequency of CSD in the penumbral zone correlated with the volume of infarct. However total duration of CSD was slightly related with the infarct volume after 6 hours of the permanent MCA occlusion(r=0.414, p=0.0318).

우각차단을 동반한 급사증후군 2예

박상선,남기병,최기준,송재관,김재중,박승정,박종훈,김유호 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.5

Mossbauer 분광법을 이용한 10MnO₂-10Fe₂O₃-30Na₂O-50SiO₂유리내의 Fe³+ 이온에 관한 연구

朴冠鎬,洪性樂,洪致裕,白承道 濟州大學校 基礎科學硏究所 1988 基礎科學硏究 Vol.1 No.1

We have studied the Mossbauer parameters for ?? ion in the quenched glass and heat treated glasses. The Mossbauer spectra of the quenched glass were investigated at various temperatures from 60K to 300K. Using the center shift and kinetic temperature, the Debye and Einstein temperatures were calculated. The quenched glass was heat-treated at various temperatures from 530℃ to 710℃ for five hours. Both the isomer shit and quadrupole splitting parameters decreased near 590℃. And regardless of heat treatment, the ?? ion was predominantly octahedrally coordinated.

척추병변에 대한 티타늄 기구 고정술 후 핵자기 공명 영상의 진단적 효용성

이관성,박춘근,최승진,이상원,박성찬,지철,조경석,강준기,박영하 대한신경외과학회 1997 Journal of Korean neurosurgical society Vol.26 No.1

데페록사민 전처치가 토끼 심근경색 크기의 감소에 미치는 효과

양관모,오동렬,박승현,박규남,이원재,김형국,황두영,최승필,채장성 대한응급의학회 1998 대한응급의학회지 Vol.9 No.4

Background: Reperfusion of ischemic myocardium has been postulated to result in a specific oxygen radical mediated tissue injury. Iron may liberate during ischemia and we hypothesized that administration of the iron chelator, deferoxamine during ischemia would result in improved recovery after postischemic reperfusion. Purpose: To test whether iron-catalyzed processes contribute to myocardial necrosis during ischemia and reperfusion, deferoxamine was administered to block iron catalyzed hydroxyl radical formation in rabbits. Methods: Eleven rabbits were divided into two groups : control group (n=5) and deferoxamine pretreatment group (n=6). The left circumflex coronay artery was ligated for 30 minutes and reperfused for 180 minutes. Area at risk (AR) was measured by non-stained area with methylene blue injection into left atrium after left circumflex coronary artery ligation. Infarct size was measured by weighing after triphenyltetrazolium chloride staining. Heart rate was measured using electrocardiographic recording and systemic blood pressure was monitored by pressure transducer connected to the catheter in the left ventricle. Results: 1. There was no significant difference of heart rate and blood pressure in deferoxamine pretreatment group compared with control group. 2. There was significant decrease of serum iron concentration after continuous infusion of deferoxamine compared with serum iron concentration before ligation of coronary artery(P<0.05). 3. There was no significant difference of area at risk between control and deferoxamine pretreatment group. 4. Area at necrosis to area at risk was significantly reduced in deferoxamine pretreatment group compared with control group(P<0.05). The results suggest that deferoxamine infusion prior to coronary artery occlusion has a significant benefit in reducing infarct size in this model.

영양염류 제거를 위한 생물막 공정의 적용에 관한 연구

안승섭,박노삼,이수식,이관영,박상현 한국환경과학회 2000 한국환경과학회지 Vol.9 No.5

In this study, the removal possibility of nutrients of T-P, NH_3-N, NO_3-N, and T-N is examined through a positive experimental study using submerged biofilter of media packing channel method. From the analysis of nutrients removal efficiency for each run of the collected sample, following results are obtained. Firstly, the result of N/P surveying for inflow shows serious value that excess the limit value of 20 as the values are in the range of 12.0∼42.7 and the average is 25.73. Secondly, the highest concentration of the incoming NH_3-N reaches double of the standard since the concentrations of NH_3-N, and NO_3-N for inflow shows 0.06㎎/ℓ , and 2.5∼3.8㎎/ℓ respectively, and the average removal rate which passed the submerged biofilter adopted in this study is a satisfactory level. Next, the average removal rate of T-P of 51.5% shows the possibility of entrophication removal since the removal rate of T-P of 66.8∼68.8% in relative low temperature period of RUN 1∼2 appeared higher than in RUN 3∼6, and T-N shows relatively poor result with the average removal rate of 34.1%. And it is known that the bigger BOD/P and BOD/N are, the more removal rate increases from the examination result of the relation between BOD/P and BOD/N, and the treatment water T-P and T-N to decide the relation with the concentration of organic matters, and thought that the appropriate proportion is necessary for effective removal of nitrogen and phosphorus.

인체에서 방사되는 생물광자(生物光子)에 대한 소고

이승호,김진수,박하준,양준모,소광섭,임사비나 경희대학교 동서의학연구소 2006 東西醫學硏究所 論文集 Vol.2006 No.-

Objectives : The purpose of this study is to review research papers published by Korean research groups on biophoton of human beings based on experiment subject and methodology. Methods : In order to review human biophoton research executed in Korea, all the papers published in Korean and international journals by Korean research groups were selected. Several key foreign papers were also reviewed for clarification of this study. Based on experiment subjects, experiment methodology, and interpretation of experiment results were analyzed. On each experiment, its original interpretation was directly quoted. Issues on the experiment methodology and interpretation were expressed at the end of each subject. Results and Conclusions : We found that experiments on human biophoton were compelling. However it seemed that mom experiments, especially on their sample sizes, ate needed to demonstrate its clinical application. Interpretations based on Korean traditional medicine also need to be elaborated more. In order to do accomplish clinical application of biophoton, interdisciplinary works are required. Some suggestions on biophoton experiments were made.

Polyethylene glycol 용액(Colyte^(R))을 복용한 후 발생한 Boerhaave 증후군 1예

이관행,기승석,김인숙,김민정,박인호,장세중,하지수,김응수 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Spontaneous esophageal rupture (Boerhaave's syndrome) is a rare case that require early diagnosis and treatment because of its high mortality. The oral administration of osmotically balanced polyethylene-glycol-based electrolyte preparation is a commonly prescribed preparation for cleansing in patients undergoing colonoscopy. Nausea, vomiting and abdominal pain are frequently seen, but serious adverse reactions are rare. Esophageal rupture secondary to severe vomiting, which occurred during colonoscopy preparation using polyethylene gIycoI(PEG) electrolyte solution is extremely rare and only few cases have been published in the literature. We report a case of spontaneous esophageal rupture after routine administration of the PEG before colonoscopy. 대장 정결을목적으로 PEG 사용 후 아주 드물게 발생하는 Boerhaave 증후군 1예를 경험하였기에 보고하는 바이다.

全南 南部와 西部海域의 海洋物理, 化學的 特性

田承寬,金相根,朴榮齋,李貞愛 木浦大學校沿岸生物硏究所 1984 沿岸生物硏究 Vol.1 No.1

Seasonal variations of physico-chemical factors were studied in both southern and western coastal waters of Chon Nam Province during a decade from 1971 to 1980. The variation of water temperature in the investigated areas was within the range of 3.6-27℃ throughout the research period. The temperature of western coastal water was lower than that of southern coastal water by 2∼4℃ in February. In spring and summer, water temperature of Jindo-Jodo area was characteristically lower than any other area by 1.0∼1.5℃. The aslinity varied within the range of 25.97∼34.32%0 throughout the research period, and showed its maximum value in February and its minimum in September. Western coastal water was always less saline than southern coastal water. Dissolved oxygen varied widely within the range of 4.25∼58.75㎖/ℓ,and showed the lowest value in September and the highest in February. Concentrations of nitrite, Phosphate, and silicate varied within the range of 0.01∼2.96 ㎍-at/ℓ, 0.06∼2.07㎍-at/ℓ, and 2.13∼29.-01 ㎍-at/ℓ, respectively. Nitrite and silicate reached their maximum concentrations in summer but phosphate reached its maximum concentration in winter. These nutrients appeared abundantly in Sinan-Mokpo area and Waned-Kangjin area, under influence of the Yongsan liver and the Tamijin liver, respectively. Transparency of waters in the investigated areas varied within the range of 0.1∼5.0m with the tendency of being lower in southern coastal area than in southern coastal area than in western coastal area. Maximum value of transparency appeared in summer, and minimum value in winter.