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SEM-EDX 분석법에 의한 부산 S공업단지의 PM<sub>10</sub>과 PM<sub>2.5</sub>의 화학적 조성 및 발생원 추정
김용석 ( Yong-seog Kim ),최금찬 ( Kum-chan Choi ),서정민 ( Jeong-min Suh ) 한국환경과학회 2017 한국환경과학회지 Vol.26 No.11
This study identified physical characteristics and aerosol particle sources of PM<sub>10</sub> and PM<sub>2.5</sub> in the industrial complex of Busan Metropolitan City, Korea. Samples of PM<sub>10</sub>, PM<sub>2.5</sub> and also soil, were collected in several areas during the year of 2012 to investigate elemental composition. A URG cyclone sampler was used for collection. The samples were collected according to each experimental condition, and the analysis method of SEM-EDX was used to determine the concentration of each metallic element. The comparative analysis indicated that their mass concentration ranged from 1% to 3%. The elements in the industrial region that were above 10% were Si, Al, Fe, and Ca. Those below 5% were Na, Mg, and S. The remaining elements (1% of total mass) consisted of elements such as Ni, Co, Br and Pb. Finally, a statistical tool was applied to the elemental results to identify each source for the industrial region. From a principal components analysis (SPSS, Ver 20.0) performed to analyze the possible sources of PM10 in the industrial region, five main factors were determined. Factor 1 (Si, Al), which accounted for 15.8% of the total variance, was mostly affected by soil and dust from manufacturing facilities nearby, Factors 2 (Cu, Ni), 3 (Zn, Pb), and 4 (Mn, Fe), which also accounted for some of variance, were mainly related to iron, non-ferrous metals, and other industrial manufacturing sources. Also, five factors determined to access possible sources of PM<sub>2.5</sub>, Factor 1 (Na, S), accounted for 13.5% of the total variance and was affected by sea-salt particles and fuel incineration sources, and Factors 2 (Ti, Mn), 3 (Pb, Cl), 4 (K, Al) also explained significant proportions of the variance. Theses factors mean that the PM2.5 emission sources may be considered as sources of incineration, and metals, and non-ferrous manufacturing industries.
정호,김용석,박문선,하호균,이종선,김주승,Jung, Ho,Kim, Yong-Seog,Park, Moon-Sun,Ha, Ho-Gyun,Lee, Jong-Sun,Kim, Ju-Seung 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.9
Objective : Flat back syndrome constitutes a syndrome complex characterized by the loss of normal lumbar lordosis. Various techniques of correction for flat back syndrome have been reported. Posterior extension osteotomy has certain drawbacks. Forceful hyperextension of the spine may result in vascular complications such as rupture of the aorta or the inferior vena cava and stretching of superior mesenteric artery, and pseudoarthrosis. We describe a rationale and technique of transvertebral posterior extension osteotomy to avoid complications of posterior extension osteotomy and to achieve an correction of 30 degrees of flat back syndrome. Method : A 63-year-old woman with degenerative lumbar kyphosis presented with low back pain, thigh pain, knee pain and walking difficulty. Transpedicular fixation from L1 vertebra to S1 vertebra was accomplished for lumbar degenerative kyphosis. After 6 months, the patient presented with flat back syndrome. A second operation was performed with transvertebral posterior extension osteotomy. Result : With short segemental fusion, early bone fusion and correction of 30 degrees were achieved. Conclusion : Transvertebral posterior extension osteotomy provide an 30-60 degrees of correction of flat back syndrome. This technique is considered to be good method for the revision of lumbar degenerative kyphosis.
Sodium Butyrate자극에 의한 세포 분화와 cdx-2조절
김진배 ( Kim Jin Bae ),한동수 ( Han Dong Su ),이항락 ( Lee Hang Lag ),김용석 ( Kim Yong Seog ) 대한소화기학회 2003 대한소화기학회 추계학술대회 Vol.2003 No.-
<배경 및 연구목적> 점막의 상피세포는 선와의 미분화세포에서 융모 끝에 분화 세포까지 빠르게 이행되는 역동적인 구조를 가진다. 이에 관여하는 cdx-2 유전자는 homeobox 유전자의 하나로 장점막에 특이적인 전사인자로 장점막의 항상성 유지에 중요한 역할을 한다. Sodium butyrate (NaB)는 장상피세포에 의해 생성되는 식이성 섬유의 대사물로서 대장 상피 세포의 분화에 관여한다. 본 연구는 장상피세포 분화를 유도하는 NaB가 cdx-2 유전
공동-지주막하 단락술로 실패한 외상후 척수공동증에 대한 공동-흉막강 단락술 - 증례보고 -
이창우,김용석,이종선,박문선,하호균,김주승,Lee, Chang-Woo,Kim, Yong-Seog,Lee, Jong-Sun,Park, Moon-Sun,Ha, Ho-Gyun,Kim, Joo-Seung 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.5
The authors report a case of syringo-pleural shunt for recurrent distal obstruction of syringosubarachnoid shunt in a 23-year-old woman. She complained of tingling sensation and dysesthesia on the left upper extremity. Neuroradiologic imaging studies revealed syringomyelia in the left lateral side of the cord from medulla to 7th thoracic cord level. We identified intraoperatively high internal pressure of the syrinx cavity due to distal shunt tube obstruction. Syringo-pleural shunt was performed and cavity size was markedly decreased at later follow up MRI. In conclusion, the posttraumatic syrinx, especially in cases with previous syringosubarachnoid shunt or diffuse subarachnoid scarring, can be successfully managed with syringo-pleural shunt.