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백서의 척수에서 방사선 조사에 의한 세포자멸사에 Nimodipine이 미치는 영향
김세훈,조태형,임동준,박정율,정용구,서중근 대한신경외과학회 2003 Journal of Korean neurosurgical society Vol.33 No.6
Objective:Radiation therapy is an effective adjunctive therapy in the management of brain and spinal cord tumors. The damage to normal tissue, however, has been often the dose-limiting factor in radiation therapy. The purpose of this study is to see whether nimodipine, the one of calcium channel blockers, is effective for the prevention of irradiation-induced apoptosis in the rat spinal cord. Methods:Sprague-Dawley rats were used:Control(n=12), Nimodipine-treated(0.5mg/kg, n=12). After nimodipine was administered intraperitoneally, the spinal cord of cervicothoracic junction was exposed to a single 10Gy dose of gamma rays using Ir-192. All spinal cords underwent histological examination at 4, 8, and 12 hours after irradiation, and apoptotic cells were detected by TUNEL assay and were determined by direct visual counting at magnification of ×200. Results:On the standard H-E stain, little evidence of histopathological change was noted within the 12 hours after irradiation. Both groups showed gradual increase of apoptotic cell counts with the lapse of time. But, in nimodipine-treated group, apoptotic cell counts were reduced significantly, compared to those of control group after irradiation, especially at 8 and 12 hours. Conclusion:The results suggest that nimodipine may have effects on the prevention of radiation-induced apoptosis in the spinal cord. Key words:Radiation;Apoptosis;Nimodipine;Spinal cord;Rat.
화학레이저 구동용 이젝터 시스템 개발 (I) - 화학레이저 구동용 초음속 이젝터 설계 변수 연구 -
김세훈,권세진,Kim, Se-Hoon,Kwon, Se-Jin 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.12
It is essential to operate chemical lasers with supersonic ejector system as the laser output power goes up. In this research, ejector design parameter study was carried out for optimal ejector design through understanding the ejector characteristics and design requirements for chemical lasers operating. Designed ejector was 3D annular type with 2$^{nd}$ -throat geometry and pressurized air was used for primary flow. Ejector design was carried out with two steps, quasi-1D gas dynamics was used for first design and commercial code was used to verify the first design. In this study, to get the effect of ejector geometry on its performance, three cases of primary nozzle area ratio and 2$^{nd}$ -throat cross sectional area and two cases of 2$^{nd}$ -throat L/D ratio experiments were carried out. Primary and secondary pressures were measured to get the mass flow rate ratio, minimum secondary pressure, ejector starting pressure and unstarting pressure at every case. In the result, better performance than design level was shown and optimal ejector design method for chemical lasers was obtained.
김세훈,오경균,김중환 중앙대학교 의과대학 의과학연구소 1984 中央醫大誌 Vol.9 No.2
The author observed 68 cases of the tympanic membrane perforation, who visited at the Department of Otolaryngology of Capital Armed Forces General Hospital in 1983. The results obtained were as follows; 1. The symptoms were hearing loss 56 cases(82.4%), tinnitus 50 cases(73.5%), otalgia 48 cases(70.6%), autophonia 40 cases (58.8%) in order. 2. The duration from tympanic membrane perforation to confirmation at OPD was usually within 3 days(44 cases, 64.8%). 3. The side of tympanic membrane perforated ear was usually left side in 50 cases(73.5%). 4. The location of tympanic membrane perforation was usually seen in the anteroinferior quadrant(28 cases, 41.2%) and intermediate portion (36 cases, 53.0%), and the shape of tympanic membrane perforation usually showed triangular shape(43 cases, 63.2%), and the triangular shape was about 25.5 ㏈ in air-bone gap. 5. The air-bone gap after tympanic membrane perforation was usually about 11-20 ㏈(30cases, 44.1%). 6. As nonhealing 5 cases of nonhealing tympanic membrane perforation 6 cases (8.8%) occurred within the patients of the nasal problem (12 cases) in relationship between Eustachian tube and the neighboring organs, the Eustachian tube was influenced by the diseases of the neighboring organs with symptoms (maxillary sinus and intranasal structures), and the function of Eustachian tube was disturbed, thereby the healing of tympanic membrane perforation was delayed. 7. In 44 cases visited at out patient department in 3rd day from tympanic membrane perforation, it usually occurred the transformation for the shape of tympanic membrane perforation that the triangular shape was transformed to irregular round, and the irregular round was changed to round. And the healing duration of tympanic membrane perforation was mostly closed in 10 weeks.
양측 뇌 기저핵에 동시에 발생한 자발성 뇌 실질내 출혈
김세훈,조태형,정흥섭,이훈갑,주정화,이기찬 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.6
Spontaneous intracerebral hemorrhage is one of the most devastating forms of cerebrovascular disease in the field of neurosurgery, and is most frequently associated with the hypertension in the distribution of the penetrating yessels, or can be secondary to other factors, like aneurysm, arteriovenous malformation, glial tumor, metastasis, infarction, anticoagulation therapy, coagulation disorders such as leukemia or thrombocytopenia. Although many cases of recurrent hypertensive intracerebral hemorrhage have been reported, bilateral simultaneous hemorrhage has not been reported. The authors report a case of bilateral simultaneous hypertensive intracerebral hemorrhage in a 62-year-old male, which was treated by conservative management.
김세훈,김종호 서울행정학회 2008 한국사회와 행정연구 Vol.19 No.1
Korea and the U.S. come to a settlement on Free Trade Agreement. The FTA will include investment chapter which is similar to the NAFTA investment chapter. The NAFTA investment chapter provides investors with strong investment protection and an arbitration mechanism to resolve disputes between an investor and the state. Since it was combined with FTA in the NAFTA, it has construed one of the most powerful mechanism to enforce provisions of investment agreements and to protect transnational capitals. This paper studies on the NAFTA investment dispute cases and considers their policy implications for Korea. Korea government has to increase its ability to manage the investor-state disputes effectively.