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| 1 | Break-up Characteristics of Gelled Propellant Simulants with Various Gelling Agent Contents显示文摘Gel propulsion systems have many advantages with respect to high performance, the energy management of liquid propulsion systems, storability, high density impulse, and low leakage of liquid propellants. The atomization process provides sufficient contact surface area between the gelled fuel and oxidizer jets. It is important to study how injection characteristics of gelled propellants are related with break-up and spray distribution. The break-up and mixing processes are very important in achieving maximum efficiency and necessitate the careful study of combustion instability. Gelled propellants are non-Newtonian fluids in which the viscosity is a function of the shear rate, and they have a high dynamic shear viscosity which depends on the amount of gelling agent contents. The present study has focused on the break-up process, wave development of ligament and liquid sheets formed by impinging jets with various gelling agent contents. Especially, the break-up processes of the impinging jets at the initial conditions are studied. The break-up process of like-on-like doublet impinging jets are experimentally characterized using non-Newtonian liquids which are mixed by ionized water 98.5 wt%, Carbopol 941 0.5wt% or 1.0wt%, and NaOH(concentration 10%) 1.0wt%. For the like-on-like doublet injector, the generation of a liquid sheet at the impinging point of two jets was observed. The spray shape with elliptical pattern is distributed in a perpendicular direction to the momentum vectors of the jets. Gelled propellant simulants with high viscosity jets are more stable and produce less pronounced surface waves than low viscosity jets. Generally, the break-up length decreased due to the increasing Reynolds number. However, surface waves and atomized droplets increased. Gelled propellant simulants from like-on-like doublet impinging jets have the spray shape of closed rim patterns at low pressure. Also, the rim patterns of spray have no disturbances on the spray sheet. As the injection pressure increased, rimless patterns which were composed of ligament sheets and small droplets emerged due to the effect of the aerodynamic action. Periodic wave-like structures observed from the near impingement point and atomized droplets were observed at a location further downstream. | Inchul Lee Jaye Koo | 2010 | Journal of Thermal Science2010，19，6： | 8 |
| 2 | Ethnic difference of Helicobacter pylori gastritis: Korean and Japanese gastritis is characterized by male- and antrum-predominant acute foveolitis in comparison with American gastritis显示文摘AIM: To investigate the clinicopathological factors underlying the ethnic differences of Helicobacter pylori gastritis and cancer.METHODS: We analyzed clinicopathological parameters of gastric biopsies having H pylori infection that were randomly selected from different ethnic populations including 147 Americans, 149 Japanese, and 181 Koreans.RESULTS: Males were predominant in Japanese and Korean populations (77.9 and 67.4% respectively) in comparison with Americans (48.3%) (P<0.001). H pylori gastritis in Koreans and Japanese was characterized by the predominant antral involvement. In the antrum,neutrophilic infiltration into the proliferative zone of pit, i,e.acute foveolitis, was more frequent in Koreans (82%) than in Japanese (71%) (P<0.05) and Americans (61%) (P<0.001).Interstitial neutrophilic infiltration, intestinal metaplasia and atrophy were also frequent in Koreans and Japanese. In the body, the prevalence of acute foveolitis was not significantly different among the populations while chronic interstitial inflammation and lymphoid follicles were more pronounced in the body of Americans than in the body of others (P<0.01).CONCLUSION: The male-, and antrum-predominant Hpylori gastritis in Koreans and Japanese is compatible with the pattern of sex and topographical distribution of gastric cancer incidence. Our data suggest that persistent acute foveolitis at the proliferative zone is a crucial step in the gastric carcinogenesis. | Inchul Lee Hojung Lee Mijung Kim Manabu Fukumoto Shinji Sawada Shriram Jakate Victor E.Gould | 2005 | World Journal of Gastroenterology2005，11，1： | 5 |
| 3 | Critical pathogenic steps to high risk Helicobacter pylori gastritis and gastric carcinogenesis显示文摘Helicobacter pylori(H.pylori)gastritis may progress to high risk gastropathy and cancer.However,the pathological progression has not been characterized in detail.H.pylori induce persistent inflammatory infiltration.Neutrophils are unique in that they directly infiltrate into foveolar epithelium aiming the proliferative zone specifically.Neutrophilic proliferative zone foveolitis is a critical pathogenic step in H.pylori gastritis inducing intensive epithelial damage.Epithelial cells carrying accumulated genomic damage and mutations show the Malgun(clear)cell change,characterized by large clear nucleus and prominent nucleolus.Malgun cells further undergo atypical changes,showing nuclear folding,coarse chromatin,and multiple nucleoli.The atypical Malgun cell(AMC)change is a novel premalignant condition in high risk gastropathy,which may progress and undergo malignant transformation directly.The pathobiological significance of AMC in gastric carcinogenesis is reviewed.A new diagnosis system of gastritis is proposed based on the critical pathologic steps classifying low and high risk gastritis for separate treatment modality.It is suggested that the regulation of H.pylori-induced neutrophilic foveolitis might be a future therapeutic goal replacing bactericidal antibiotics approach. | Inchul Lee | 2014 | World Journal of Gastroenterology2014，20，21： | 4 |
| 4 | Mixing Characteristics of Pulsed Air-assist Liquid Jet into an Internal Subsonic Cross-flow显示文摘Penetration depth,spray dispersion angle,droplet sizes in breakup processes and atomization processes are very important parameters in combustor of air-breathing engine.These processes will enhance air/fuel mixing inside the combustor.Experimental results from the pulsed air-assist liquid jet injected into a cross-flow are investigated.And experiments were conducted to a range of cross-flow velocities from 42~136 m/s.Air is injected with 0~300kPa,with air-assist pulsation frequency of 0~20Hz.Pulsation frequency was modulated by solenoid valve.Phase Doppler Particle Analyzer(PDPA) was utilized to quantitatively measuring droplet characteristics.High-speed CCD camera was used to obtain injected spray structure.Pulsed air-assist liquid jet will offer rapid mixing and good liquid jet penetration.Air-assist makes a very fine droplet which generated mist-like spray.Pulsed air-assist liquid jet will introduce additional supplementary turbulent mixing and control of penetration depth into a cross-flow field.The results show that pulsation frequency has an effect on penetration,transverse velocities and droplet sizes.The experimental data generated in these studies are used for a development of active control strategies to optimize the liquid jet penetration in subsonic cross-flow conditions and predict combustion low frequency instability. | Inchul Lee Youngsu Kang Jaye Koo | 2010 | Journal of Thermal Science2010，19，2： | 3 |
| 5 | Breakup Structure of Two-phase Jets with Various Momentum Flux from a Porous Injector显示文摘Spray structure and atomization characteristics were investigated through a comparison of a porous and a shear coaxial injector. The porous injector shows better atomization performance than the shear coaxial injector. To increase atomization performance and mixing efficiency of two-phase jets, a coaxial porous injector which can be applicable to liquid rocket combustors was designed and tested. The characteristics of atomization and spray from a porous and a shear coaxial injector were characterized by the momentum flux ratio. The breakup mechanism of the porous injector is governed by Taylor-Culick flow and axial shear forces. Momentum of injected gas flow through a porous material which is composed of sintered metal is radically transferred to the center of the liquid column, and then liquid column is effectively broken up. Although the shapes of spray from porous and shear coaxial jets were similar for various momentum ratio, spray structures such as spray angle and droplet sizes were different. As increasing the momentum flux ratio, SMD from the porous injector showed smaller value than the shear coaxial | Inchul Lee Dohun Kim Jaye Koo | 2014 | Journal of Thermal Science2014，23，1： | 2 |
| 6 | In vitro fertilization of ovine oocytes vitrified by solid surface vitrification at germinal vesicle stage显示文摘 | Adel R. Moawad Patricia Fisher Jie Zhu Inchul Choi Zsuzsanna Polgar Andras Dinnyes Keith H.S. Campbell | 2012 | Cryobiology2012，，2： | 1 |
| 7 | TNF/LTA polymorphisms and risk for gastric cancer/duodenal ulcer in the Korean population显示文摘 | Seong-Gene Lee Byungsik Kim Jung-Hwan Yook Sung-Tae Oh Inchul Lee Kyuyoung Song | 2004 | Cytokine2004，，2： | 1 |
| 8 | Cardiac Beh?et Disease Presenting as Aortic Valvulitis/Aortitis or Right Heart Inflammatory Mass: A Clinicopathologic Study of 12 Cases显示文摘 | Inchul Lee Sohyung Park Ilseon Hwang Mi-Jeong Kim Seong-Su Nah Bin Yoo Jae-Kwan Song | 2008 | The American Journal of Surgical Pathology2008，，3： | 1 |
| 9 | Use of multiplex polymerase chain reactions to indicate the accuracy of the annealing temperature of thermal cycling显示文摘 | Inchul Y Young H K Byun J Y | 2005 | Analytical Biochemistry2005，338，： | 1 |
| 10 | Electrochemical characteristics of copper silicide-coated graphite as an anode material of lithium secondary batteries 显示文摘 | Kim InChul Byun Dongjin Lee Sangwha | 2006 | Electroehimica Acta2006，52，： | 1 |
| 11 | Pharmacokinetics of ome prazole after intravenous and oral administration to rats with liver cirrhosis induced by dimethylnitrosamine显示文摘 | Dae Y L Inchul L Myung G L | 2007 | Inter J Pharm2007，330，： | 1 |
| 12 | Comparison of the infrared surface emissivity model (ISEM) with a physical emissivity model 显示文摘 | Hong Sungwook Inchul Shin | 2010 | Journal of Atmospheric & Oceanic Technology2010，27，2： | 1 |
| 13 | Malgun (Clear) Cell Change in Helicobacter pylori Gastritis Reflects Epithelial Genomic Damage and Repair显示文摘 | Jaejung Jang Seungkoo Lee Yusun Jung Kyuyoung Song Manabu Fukumoto Victor E. Gould Inchul Lee | 2003 | The American Journal of Pathology2003，，4： | 1 |
| 14 | “Malgun” (clear) Cell Change of Gastric Epithelium in Chronic Helicobacter pylori Gastritis显示文摘 | Hunkyung Lee Jaejung Jang Yunjung Kim Sangho Ahn Mikyung Gong Eunsuk Choi Inchul Lee | 2000 | Pathology - Research and Practice2000，，8： | 1 |
| 15 | Acute Inflammation of the Proliferative Zone of Gastric Mucosa in Helicobacter pylori Gastritis显示文摘 | Eunsil Yu Hun Kyung Lee Hae Ryun Kim Moo-Song Lee Inchul Lee | 1999 | Pathology - Research and Practice1999，，10： | 1 |
| 16 | Effects of bacterial lipopolysaccharide on the pharmacokinetics of metformin in rats显示文摘 | Choi Y H Lee Inchul Lee M G | 2007 | Int J Pharm2007，337，： | 1 |
| 17 | Guanine nucleotide‐binding protein 1 is one of the key molecules contributing to cancer cell radioresistance显示文摘 | Motoi Fukumoto Tatsuya Amanuma Yoshikazu Kuwahara Tsutomu Shimura Masatoshi Suzuki Shiro Mori Hiroyuki Kumamoto Yohei Saito Yasuhito Ohkubo Zhenfeng Duan Kenji Sano Tomohiro Oguchi Kazuyuki Kainuma Shinichi Usami Kengo Kinoshita Inchul Lee Manabu Fukumoto | 2014 | Cancer Sci2014，，10： | 1 |
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