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홍성아 ( Seong Ah Hong ),하태훈 ( Tae Hoon Ha ),류지원 ( Ji Won Lyu ),김양기 ( Yang Ki Kim ),이영목 ( Young Mok Lee ),김기업 ( Ki Up Kim ),어수택 ( Soo Taek Uh ),노형준 ( Hyung Jun Noh ),김용재 ( Yong Jae Kim ),구동억 ( Dong Erk G 대한결핵 및 호흡기학회 2007 Tuberculosis and Respiratory Diseases Vol.62 No.1
A bronchial artery aneurysm is a rare condition, which needs optimal treatment due to the possibility of a life-threatening hemorrhage by rupture. The surgical removal of the aneurysm is the standard treatment. However, there are a few reports of coil embolization with a transcatheter. A 69 year-old man was referred for a further evaluation of a mass in the right hilum on chest radiography. He denied any respiratory symptoms. A chest CT scan showed a 3 × 3 × 4.5 cm sized vascular mass with strong contrast enhancement on the right hilar area that originated from the bronchial artery. On the angiogram, the bronchial artery originated from the descending thoracic aorta at the T8 level. A bronchial artery aneurysm was catheterized selectively. and embolized successfully with a coil. After coil embolization, the selective bronchial arteriography confirmed complete occlusion. We report this case of bronchial aneurysm that was treated successfully with coil embolization. (Tuberc Respir Dis 2007; 62: 62-66)
폐쇄형 육묘시설 내에서 몇 가지 광원이 토마토와 오이의 묘소질에 미치는 영향
엄영철(Yeong Cheol Um),장윤아(Yoon Ah Jang),이준구(Jun Gu Lee),김승유(Seung Yu Kim),정승룡(Seung Ryong Cheong),오상석(Sang Seok Oh),차선화(Seon Hwa Cha),홍성창(Seong Chang Hong) (사)한국생물환경조절학회 2009 시설원예‧식물공장 Vol.18 No.4
폐쇄형 육묘시설 내에서 균일한 품질의 플러그묘를 주년으로 생산함에 있어서 LED 광원의 이용 가능성을 검토하기 위하여, 토마토와 오이의 육묘기간 동안에 광원을 달리하여 묘소질을 비교하였다. 적색, 청색, 혼합(적색 2 +청색 1) LED 및 형광등을 40~60μmolㆍm?²ㆍs?¹ 로 광도(PPF)를 조사하여 30일간 온도조절이 가능한 폐쇄형 육묘시스템에서 육묘하였다. 토마토와 오이 모두 형광등에 비해 적색 LED와 혼합 LED 처리에서 배축의 신장이 작으면서 튼튼한 묘을 생산할 수 있었다. 토마토와 오이의 생체중은 적색 LED에서 가장 무거웠는데 형광등에 비하여 각각 74% 증가하였다. 토마토의 1화방 착과절위에서는 처리간에 차이가 없었으나, 2화방의 착과절위는 혼합광 처리에서 낮았다. 화방별 착화수는 처리간에 차이가 없었다. 오이의 20절 까지의 암꽃 착생률은 적색 LED 처리에서 52%로 가장 높았고, 다음이 혼합광 처리로서 44%였다. 과실 착과수와 수량은 처리간에 차이가 없었다. 이상의 결과로부터 폐쇄형 육묘시설 내에서 토마토와 오이의 묘생산에는 적색 및 적색 2 +청색 1의 혼합 LED가 이용 가능성이 높은 것으로 판단하였다. To produce uniform seedlings of tomato and cucumber with inexpensive way, their seedling quality by different light sources was investigated. The raising of seedling was performed by red LED (light emitting diodes), blue LED, red-blue mixed LED or fluorescent light with a fixed PPF(photosynthetic proton flux) level, about 40~60μmolㆍm?²ㆍsec?¹. In the both tomato and cucumber, the rapid extension of hypocotyledonary axis was observed in Blue LED than fluorescent light, but opposite result was found in Red and mixed LED. During the nursery period of tomato and cucumber, the fresh weight was the highest in Red LED as 74% increasement in tomato and 74% in cucumber. In the case of seedling quality after the tomato nursery, there was no difference in the positions of 1st flower cluster and the number of bearing-flower per flower cluster by each light source. In case of cucumber, until 20th node, the setting ratio of female flower was higher in LED than fluorescent treatment, and also more healthy fruit setting was found in LED. Therefore, we assume that the Red or mixed (Red 2 + Blue 1) LED is more favorable to produce high quality tomato and cucumber seedlings in closed nursery facility.
함형철 ( Hyung Chul Ham ),윤성필 ( Sung Pil Yoon ),홍성안 ( Seong-ah Hong ) 한국신재생에너지학회 2007 신재생에너지 Vol.3 No.1
A sintering aid, B<sub>2</sub>O<sub>3</sub> have been included into a LiAlO<sub>2</sub> electrolyte support by a tape casting method in order to reinforce mechanical strength of the support for molten carbonate fuel cells [MCFCs). Starting idea originates from the low melting point of B<sub>2</sub>O<sub>3</sub> (450℃), which can provide the low temperature consolidation of ceramic materials. The mechanical properties and the microstructure changes of the B<sub>2</sub>O<sub>3</sub>-included electrolyte support were examined by scanning electron microscope, mercury porosimetry, X-ray powder diffraction [XRD], high temperature differential scanning calorimeter and three-point bending strength measurement. The mechanical strength was clearly improved by addition of B<sub>2</sub>O<sub>3</sub>. The increase of mechanical strength results from the neck growth of a new LiAlO<sub>2</sub> phase between LiAlO<sub>2</sub> particles by the liquid phase sintering. Average pore size and porosity of the electrolyte support reinforced by addition of the sintering aid, B<sub>2</sub>O<sub>3</sub>, was 0.24㎛ and 59%, respectively which were suitable microstructure of a matrix for an application of MCFCs.
용융 탄산염 연료전지용 gamma LiAlO₂ 전해질 지지체의 미세구조 및 기계적 강도 변화에 대한 B₂O₃ 첨가의 영향
함형철(Ham, Hyung-Chul),윤성필(Yoon, Sung-Pil),홍성안(Hong, Seong-Ah) 한국신재생에너지학회 2007 신재생에너지 Vol.3 No.1
A sintering aid, B₂O₃ have been included into a LiAlO₂ electrolyte support by a tape casting method in order to reinforce mechanical strength of the support for molten carbonate fuel cells [MCFCs). Starting idea originates from the low melting point of B₂O₃ (450?C), which can provide the low temperature consolidation of ceramic materials. The mechanical properties and the microstructure changes of the B₂O₃-included electrolyte support were examined by scanning electron microscope, mercury porosimetry, X-ray powder diffraction [XRD], high temperature differential scanning calorimeter and three-point bending strength measurement. The mechanical strength was clearly improved by addition of B₂O₃. The increase of mechanical strength results from the neck growth of a new LiAlO₂ phase between LiAlO₂ particles by the liquid phase sintering. Average pore size and porosity of the electrolyte support reinforced by addition of the sintering aid, B₂O₃, was 0.24{mu}m and 59%, respectively which were suitable microstructure of a matrix for an application of MCFCs.