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Lee, Young Joon,Jeong, Sang Ho,Hur, Hoon,Han, Sang-Uk,Min, Jae Seok,An, Ji Yeong,Hyung, Woo Jin,Cho, Gyu Seok,Jeong, Gui Ae,Jeong, Oh,Park, Young Kyu,Jung, Mi Ran,Kim, Young-Woo,Yoon, Hong Man,Eom, Ba Williams & Wilkins Co 2015 Medicine Vol.94 No.43
<P><B>Abstract</B></P><P>The clinical application of sentinel node biopsies in early gastric cancer is still controversial even though it appears promising. This study was conducted as a prerequisite quality control for surgical standardization of laparoscopic sentinel basin dissection (SBD) prior to the initiation of a phase III trial.</P><P>Laparoscopic SBD was performed in patients with preoperative stage T1-2N0 and tumor size <4 cm in diameter. Intraoperative endoscopic submucosal injection of a standardized dual tracer was administered. All retrieved sentinel basin nodes (SBN) were investigated with intraoperative frozen hematoxylin and eosin (H&E) staining. A strict checklist consisting of 7 essential steps was followed during laparoscopic SBD as the quality control study for a phase III trial. Completion of all essential steps in the checklist for 10 cases was used to define a qualified institution.</P><P>Seven institutions participated and 112 patients were enrolled in this study. However, 4 patients were excluded owing to screening failure. The mean number of cases required for institutional qualification was 15 cases (range, 13–20 cases). Sentinel basins (SB) were detected and dissected in 100 of the 108 patients (92.6%); the median number of SB and SBN was 2 and 7, respectively. Lymph node metastases were detected in 10 patients by postoperative permanent H&E staining and they were detected by SBD in all 10 patients. Frozen results of SBN were compatible with permanent staining reports.</P><P>Laparoscopic SBD is feasible and demonstrated improved sensitivity in detecting metastatic lymph nodes compared to the previous study. A future phase III randomized trial comparing laparoscopic SBD with organ-preserving gastrectomy and laparoscopic standard gastrectomy seems promising for qualified institutions.</P>
Axial Gas Dispersion in a Fluidized Bed of Polyethylene Particles
Han,Gui Young,Cho,Hong Il,Chung,Chan Wha,Ahn,Gui Ryong,Kong,Jong Su 한국화학공학회 2000 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.38 No.3
Gas mixing behavior was investigated in a residence time distribution experiment in a bubbling fluidized bed of 0.07 m ID and 0.80 m high. Linear low density polyethylene (LLDPE) particles having a mean diameter of 772 ㎛ and a particle size range of 200-1,500 ㎛ were employed as the bed material. The stimulus-response technique with CO₂as a tracer gas was performed for the RTD study. The effects of gas velocity, aspect ratio (H_o/D) and scale-up on the axial gas dispersion were determined from the unsteady-state dispersion model, and the residence time distributions of gas in the fluidized bed were compared with the ideal reactors. It was found that axial dispersion depends on the gas velocity and aspect ratio of the bed. The dimensionless dispersion coefficient was correlated with Reynolds number and aspect ratio.
Young Hwan Kim,Gui Yun Sohn,Yooun Joong Jung,Kyu Hyouck Kyoung,Suk-Kyung Hong 대한중환자의학회 2012 Acute and Critical Care Vol.27 No.4
Hemodynamics of a brain-dead donor can change rapidly during management. It frequently leads to loss of the donor or deterioration of organ functions. Various efforts have been made not to lose potential donors. Extracorporeal membrane oxygenation (ECMO) and non-heart-beating donation (NHBD) are good examples of such efforts. A 47 year-old woman with a history of hypertension, diabetes mellitus and atrial fibrillation was diagnosed with cerebral infarction and hemorrhage. Cardiopulmonary resuscitation was performed three times before transfer to our hospital. Her family agreed to organ donation. ECMO was applied due to her unstable vital signs, which made the first declaration of brain death possible. However, considering the deteriorating vital signs and expected cardiac arrest, it was decided to switch to NHBD under the family’s consent. All life-support devices including ECMO were turned off in the operation room. After cardiac death was declared, the harvesting of liver and kidneys was performed with perfusion through an ECMO catheter. The liver and kidneys were successfully transplanted to three recipients.
Hong, Won Sung,Park, Jong Hyeok,Han, Gui Young American Scientific Publishers 2009 Journal of nanoscience and nanotechnology Vol.9 No.12
<P>The photocatalytic splitting of water into H2 and O2 using semiconductors has received much attention, especially in terms of its potential application to the direct production of H2 as a clean energy source. In this study, the H2 yield increased with increasing reactor temperature, but the TiO2 nanotube arrays collapsed after prolonged operation at temperatures over 75 degrees C. We found that aqueous Na2SO3 reagent was the best hole scavenger of the different aqueous solutions examined. Using the optimum temperatures and electrolytes, we conducted an experiment to produce H2 from solutions with different pH values, and found that acidic conditions were better in terms of the amount of H2 produced. The results obtained allowed us to identify the optimal temperature, electrolyte and pH conditions required to produce H2 by photochemically splitting water.</P>
[P8-87] Effects of Silkworm powder on the ethanol-induced erectile dysfunction in male rats
Hong-Geun Oh,Okjin Kim,Hyun-A Lee,Hyang-Im Back,Sun-Young Kim,Soo-Hyun Park,Mi-Ra Oh,Min-GuI Kim,Ji-Young Jeon,Sook-Jeong Shin,Kangsun Ryu,Soo-Wan Chae,Jong Kwan Park 한국식품영양과학회 2010 한국식품영양과학회 학술대회발표집 Vol.2010 No.10
양극 산화된 TiO₂ nanotube를 이용한 수소 생산 연구
홍원성(Hong, Won-Sung),박종혁(Park, Jong-Hyeok),한귀영(Han, Gui-Young) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.05
Photocatalytic water splitting into H₂ and O₂ using semiconductors has received much attention, especially for its potential application to direct production of H₂ for clean energy from water utilizing solar light energy. Since the report of Fujishima and Honda on the water splitting by photoelectrochemical cells, numerous different semiconducting materials have been used as photocatalysts for hydrogen generation from water. Among them, platinized titania significantly accelerates hydrogen production from water. For geometrical improvement of TiO₂ particle, porous TiO₂ structure was proposed and studied such as nanofiber, nanorod and nototubes. This research focuses on finding out the optimum temperature and electrolyte to produce H₂ by solar water splitting.