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Evaluation of non-ampullary duodenal polyps: Comparison of non-neoplastic and neoplastic lesions

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World Journal of Gastroenterology 2010年第43期16卷 5474-5480页

作者： Sung Hoon jung Woo Chul Chung Eun jung Kim Seol Hye Kim chang Nyol Paik Bo In Lee Young Seok Cho Kang-Moon Lee Department of Internal Medicine College of Medicine The Catholic University of Korea

AIM: To evaluate duodenal polyps, divided into nonneoplastic and neoplastic lesions. In addition, the clinical characteristics of duodenal hyperplastic polyps are determined. METHODS: We analyzed medical records of 50 114 consecutive patients submitted to for first diagnostic esophago-gastroduodenoscopy between January 2004 and December 2009. We excluded lesions on the ampulla of Vater and submucosal tumors. We studied 510 cases that were diagnosed endoscopically with duodenal polyps and enrolled a total of 221 cases that had undergone tissue biopsy. We analyzed the differences between non-neoplastic and neoplastic lesions, and determined the clinical features of duodenal hyperplastic polyps. RESULTS: Non-neoplastic lesions were found in 196 patients and neoplastic lesions in 25 patients. On uni-variate analysis, there were significant differences in shape, location, and size. Polyps more than 10 mm in diameter or polyps in the second portion had independent risk factors for being neoplastic lesions, as identified by multivariate analysis. In 23 cases of hyperplastic polyps (79.3%), they were accompanied by gastroduodenal pathology, which was possibly associated with Helicobacter pylori . CONCLUSION: Polyps of more than 10 mm or polyps in the second portion of the duodenum should be evaluated by histological examination.

关键词： Duodenum Polyp Helicobacter pylori

Oral cyclophosphamide-induced posterior reversible encephalopathy syndrome in a patient with ANCA-associated vasculitis:A case report

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World Journal of Clinical Cases 2021年第21期9卷 6130-6137页

作者： Yire Kim Jihye Kwak Sehyun jung Seunghye Lee Ha Nee Jang Hyun Seop Cho Se-Ho chang Hyun-jung Kim Internal Medicine Gyeongsang National University HospitalJinju 52727South Korea Institute of Health Sciences Gyeongsang National UniversityJinju 52727South Korea Internal Medicine College of MedicineGyeongsang National UniversityJinju 52727South Korea

BACKGROUND Posterior reversible encephalopathy syndrome(PRES)manifests many neurological symptoms with typical features on neuroimaging studies and has various risk *** is one of the therapeutic agents for antineutrophil cytoplasmic antibody(ANCA)-associated *** as the sole cause of PRES has been reported in only a few ***,we report a unique case of early-onset oral cyclophosphamide-induced PRES in a patient with ANCA-associated *** SUMMARY A 73-year-old man was transferred to our hospital for sepsis due to acute *** had already received hemodialysis for two weeks due to septic acute kidney *** azotemia was not improved after sepsis resolved and perinuclear-ANCA was *** biopsy showed crescentic *** hemorrhage was observed on *** was initially treated with intravenous methylprednisolone and plasma exchange for one *** then,two days after adding oral cyclophosphamide,the patient developed generalized tonic-clonic *** diagnosed PRES by Brain magnetic resonance imaging(MRI)and *** were controlled with fosphenytoin 750 *** was suspected to be the cause of PRES and *** mentality was recovered after seven days and brain MRI showed normal state after two *** The present case shows the possibility of PRES induction due to short-term use of oral cyclophosphamide *** should carefully monitor neurologic symptoms after oral cyclophosphamide administration in elderly patients with underlying diseases like sepsis,renal failure and ANCA-associated vasculitis.

关键词： Cyclophosphamide Posterior reversible encephalopathy syndrome Antineutrophil cytoplasmic antibody-associated vasculitis Renal failure Case report

Oxygen vacancy engineering for tuning the catalytic activity of LaCoO_(3) perovskite

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Journal of Rare Earths 2024年第3期42卷 506-514,I0003页

作者： Jeong Hyun Cho Minjae Kim Inchan Yang Kyung Tae Park chang Houn Rhee Hai Woong Park Ji Chul jung Department of Chemical Engineering Myongji UniversityYongin 17058Republic of Korea Institute of Advanced Composite Materials Korea Institute of Science and TechnologyWanju-gunJeollabuk-do 55324Republic of Korea Iron&Steel Process Engineering Research Group POSCOPohang 37859Republic of Korea Hydrogen Research Center Research Institute of Industrial Science&Technology(RIST)Pohang 37673Republic of Korea

Herein, we attempted to engineer oxygen vacancies on the surface of LaCoO_(3) perovskite through simple post-treatments(acid or reductive thermal treatments). Acid treatment induces oxygen vacancies through the selective etching of the La cations, whereas thermal treatment in a reducing atmosphere generates oxygen vacancies by directly removing lattice oxygen. The characterization results confirm that the number of surface oxygen vacancies, which are crucial in various catalytic oxidation reactions,considerably increases in the LaCoO_(3) catalysts treated with acid or reducing gas. Acid treatment enriches the oxygen vacancies while maintaining the structure of the LaCoO_(3) catalysts, which can not be achieved through reductive thermal treatment. Therefore, the acid treatment is considered a promising technique for oxygen vacancy engineering of perovskite catalysts for tuning their catalytic activities. Furthermore,the catalytic activities of the posttreated LaCoO_(3) catalysts for CO oxidation were evaluated and are noted to be considerably better than those of the pristine LaCoO_(3) catalyst due to their abundant oxygen vacancies. Consequently, we conclude that the oxygen vacancies of perovskite catalysts can be effectively engineered via two simple methods and play a significant role in CO oxidation.

关键词： LaCoO_(3)perovskite Acid treatment Reductive thermal treatment Oxygen vacancy CO oxidation Rare earths

Over 100-THz bandwidth selective difference frequency generation at LaAlO_(3)/SrTiO_(3) nanojunctions

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Light(Science & Applications) 2019年第1期8卷 968-974页

作者： Lu Chen Erin Sutton Hyungwoo Lee jung-Woo Lee Jianan Li chang-Beom Eom Patrick Irvin Jeremy Levy Department of Physics and Astronomy University of PittsburghPittsburghPA 15260USA Pittsburgh Quantum Institute PittsburghPA 15260USA Department of Materials Science and Engineering University of Wisconsin-MadisonMadisonWA 53706USA

The ability to combine continuously tunable narrow-band terahertz(THz)generation that can access both the farinfrared and mid-infrared regimes with nanometer-scale spatial resolution is highly promising for identifying underlying light-matter interactions and realizing selective control of rotational or vibrational resonances in nanoparticles or ***,we report selective difference frequency generation with over 100 THz bandwidth via femtosecond optical pulse *** THz emission is generated at nanoscale junctions at the interface of LaAlO_(3)/SrTiO_(3)(LAO/STO)that is defined by conductive atomic force microscope lithography,with the potential to perform THz spectroscopy on individual nanoparticles or *** simulation of the time-domain signal facilitates the identification of components that contribute to the THz *** ultra-wide-bandwidth tunable nanoscale coherent THz source transforms the LAO/STO interface into a promising platform for integrated lab-on-chip optoelectronic devices with various functionalities.

关键词： tunable lithography selective

Second phase effect on corrosion of nanostructured Mg-Zn-Ca dual-phase metallic glasses

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Journal of Magnesium and Alloys 2021年第5期9卷 1561-1570页

作者： chang Liu Qing Wang Bin Han Junhua Luan Ji-jung Kai Chain-Tsuan Liu Ge Wu Jian Lu Department of Mechanical Engineering City University of Hong KongHong KongChina Max-Planck-Institut für Eisenforschung Max-Planck-Straße 1Düsseldorf40237Germany Laboratory for Microstructures Institute of Materials ScienceShanghai UniversityShanghai 200072China Hong Kong Branch of National Precious Metals Material Engineering Research Centre Department of Material Science and EngineeringCity University of Hong KongHong KongChina Centre for Advanced Structural Materials City University of Hong Kong Shenzhen Research InstituteGreater Bay Joint DivisionShenyang National Laboratory for Materials ScienceShenzhen 518057China CityU-Shenzhen Futian Research Institute Shenzhen 518045China

Dual-phase metallic glasses(DP-MGs),a special member of the MGs family,often reveal unusual strength and ductility,yet,their corrosion behaviors are not ***,we developed a nanostructured Mg_(57)Zn_(36)Ca_(7)(at.%)DP-MG and uncovered its corrosion mechanism in simulated body fluid(SBF)at the near-atomic scale utilizing transmission electron microscope(TEM)and atom probe tomography(APT).The 10-nm-wide Ca-rich amorphous phases allow oxygen propagation into the DP-MG,resulting in a micrometer thick hydroxides/oxides *** dense corrosion layer protects the DP-MG from further corrosion,enabling a corrosion rate that is 77%lower than that of Mg(99.99%purity).

关键词： Magnesium alloys Metallic glass Corrosion Sputtered films TEM APT

THE DISSOCIATION CONSTANT OF ARACHIDIC ACID BY IR AND LB TECHNIQUES

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Chinese Chemical Letters 1996年第1期7卷 51-54页

作者： chang Yu FAN Tie Feng CHEN Long jung(Institute of Photographic Chemistry, Academia Sinica Beijing, 100101) ACAD SINICA INST PHOTOG CHEMBEIJING 100101PEOPLES R CHINA

The dissociation constant of arachidic acid an a subphase containing Ag+ ion was measured by IR and LB techniques.

关键词： ACID LB THE DISSOCIATION CONSTANT OF ARACHIDIC ACID BY IR AND LB TECHNIQUES IR

Optic radiation injury in patients with aneurismal subarachnoid hemorrhage: a preliminary diffusion tensor imaging report

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Neural Regeneration Research 2018年第3期13卷 563-566页

作者： Sung Ho Jang Chul Hoon chang Young Jin jung Seong Ho Kim Jeong Pyo Seo Department of Physical Medicine and Rehabilitation College of Medicine Yeungnam University Department of Neurosurgery College of Medicine Yeungnam University

Visual field defect is one of the various clinical manifestations in patients with subarachnoid hemorrhage（SAH）. Little is known about the pathogenic mechanism of visual field defect in SAH. In the current study,we investigated the diffusion tensor imaging （DTI） finding of the optic radiation in patients with SAH followingrupture of a cerebral artery aneurysm. We recruited 21 patients with aneurismal SAH （12 males, 9 females, mean age, 52.67 years; range, 41–68 years） who showed no definite lesion along the visual ***-one age-and sex-matched normal control subjects were also recruited. DTI data were acquired at an average of 5.9 weeks （range： 3–12 weeks） after onset and reconstruction of the optic radiation was performed using DTI-Studio software. The fractional anisotropy value, apparent diffusion coefficient value,and fiber number of the optic radiation were measured. The fractional anisotropy value of the optic radiation was significantly decreased, and the apparent diffusion coefficient value was significantly increased, in patients with aneurismal SAH than in normal control subjects. However, there was no significant difference in the fiber number of the optic radiation between patients with aneurismal SAH and normal control subjects. The decrement of fractional anisotropy value and increment of apparent diffusion coefficient value of the optic radiation in patients with aneurismal SAH suggest optic radiation injury. Therefore, we recommend a thorough evaluation for optic radiation injury in patient with aneurismal SAH.

关键词： nerve regeneration diffusion tensor imaging optic radiation subarachnoid hemorrhage visual field defect neural regeneration

Risk of critical limb ischemia in long-term uterine cancer survivors:A population-based study

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World Journal of Clinical Cases 2022年第36期10卷 13293-13303页

作者： Min-Chi Chen jung-jung chang Miao-Fen Chen Ting-Yao Wang Cih-En Huang Kuan-Der Lee Chao-Yu Chen Department of Public Health Chang Gung UniversityTaoyuan 333Taiwan Department of Obstetrics and Gynecology Chang Gung Memorial HospitalChiayi 612Taiwan Division of Cardiovascular Disease Department of Internal MedicineChang Gung Memorial HospitalChiayi 612Taiwan Department of Radiation Oncology Change Gung Memorial HospitalLinkouTaoyuan 333Taiwan Division of Hematology and Oncology Department of Internal MedicineChang Gung Memorial HospitalChiayi 612Taiwan Graduate Institute of Clinical Medical Sciences College of MedicineChang Gung UniversityTaoyuan 333Taiwan Department of Medicine Taipei Medical University HospitalTaipei 100Taiwan Department of Medical Research Taichung Veterans General HospitalTaichung 407Taiwan Department of Post-Baccalaureate Medicine College of MedicineNational Chung Hsing UniversityTaichung 402Taiwan Department of Early Childhood Care and Education Shu-Zen Junior College of Medicine and ManagementKaohsiung 821Taiwan

BACKGROUND The risk of critical limb ischemia(CLI)which causes ischemic pain or ischemic loss in the arteries of the lower extremities in long-term uterine cancer(UC)survivors remains unclear,especially in Asian patients,who are younger at the diagnosis of UC than their Western *** To conduct a nationwide population-based study to assess the risk of CLI in UC long-term *** UC survivors,defined as those who survived for longer than 5 years after the diagnosis,were identified and matched at a 1:4 ratio with normal *** Cox models were used to assess the risk of *** From 2000 to 2005,1889 UC survivors who received surgery alone or surgery combined with radiotherapy(RT)were classified into younger(onset age65 years,aHR=2.48,P=0.011),had hypertension(aHR=2.18,P=0.008)or received HRT(aHR=3.52,P=0.020)were at a higher risk of *** In this nationwide study,we found that the risk factors associated with CLI were similar in both cohorts except for adjuvant RT that was negligible in the younger group,but positive in the older *** the survivors,hypertension,advanced age,and HRT were more hazardous than *** prevention should include CLI as a late complication in UC survivorship programs.

关键词： Uterine cancer Critical limb ischemia Radiotherapy Survivorship

Development of a low-cost GPS/INS integrated system for tractor automatic navigation

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International Journal of Agricultural and Biological Engineering 2017年第2期10卷 123-131页

作者： Xiongzhe Han Hak-Jin Kim Chan Woo Jeon Hee chang Moon jung Hun Kim Dept.of Biosystems and Biomaterials Engineering College of Agriculture and Life SciencesSeoul National University.Seoul 08826Republic of Korea Unmanned Solutions Co. Seoul 06643Republic of Korea R&D Institute Tong Yang Moolsan Co.LTDChungcheongnam-do 32530Republic of Korea

The use of low-cost single GPS receivers and inertial sensors for auto-guidance applications has been limited by their reduced accuracy and signal drift over time compared to real-time kinematic(RTK)differential GPS units and fiber-optic gyroscope(FOG)*** this study,a prototype low-cost GPS/INS integrated system consisting of a triangle-shaped array of three Garmin 19x GPS receivers and an Xsens inertial measurement unit(IMU)to improve the accuracy of position and heading angle measured with a single GPS receiver was developed.A triangular algorithm that uses data collected from the three single GPSs mounted on the angular points of a triangular frame was designed.A sensor fusion algorithm based on the Kalman filter combining the GPS and IMU data was developed by integrating position data and heading angles of a triangular array of GPS *** optimized values of two noise covariance matrixes(Q and R)for the Kalman filtering were determined using the Central Composite Design(CCD)*** compared to the use of a single Garmin GPS receiver,use of the developed GPS/INS system showed improved accuracy performance in terms of both position and heading angle,with reductions in root mean square errors(RMSEs)from 2.7 m to 0.64 m for position and from 8.9ºto 2.1ºfor heading *** accuracy improvements show new potential for agricultural auto-guidance applications.

关键词： global positioning system tractor automatic navigation sensor fusion Kalman filter inertial sensor heading angle