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Risk factors for immediate post-operative fatal recurrence after curative resection of hepatocellular carcinoma

World Journal of Gastroenterology 2006年第1期12卷 99-104页

作者： Bong-Wan kim young-bae kim Hee-Jung Wang Myung-Wook kim Department of Surgery Ajou University School of MedicineWonchon dongYoungtong kuSuwonKyounggi ProvinceSouth Korea Department of Pathology Ajou University School of Medicine.Wonchon dongYoungtong kuSuwonKyounggi ProvinceSouth Korea

AIM： To investigate the clinicopathological risk factors for immediate post-operative fatal recurrence of hepatocellular carcinoma （HCC）, which may have practical implication and contribute to establishing high risk patients for pre- or post-operative preventive measures against HCC recurrence. METHODS： From June 1994 to May 2004, 269 patients who received curative resection for HCC were reviewed. Of these patients, those who demonstrated diffuse intrahepatic or multiple systemic recurrent lesions within 6 mo after surgery were investigated （fatal recurrence group）. The remaining patients were designated as the control group, and the two groups were compared for clinicopathologic risk factors. RESULTS： Among the 269 patients reviewed, 30 patients were enrolled in the fatal recurrence group. Among the latter, 20 patients showed diffuse intrahepatic recurrence type and 10 showed multiple systemic recurrence type. Multivariate analysis between the fatal recurrence group and control group showed that preoperative serum alpha-fetoprotein （AFP） level was greater than 1 000 μg/L （P= 0.02; odds ratio = 2.98）, tumor size greater than 6.5 cm （P= 0.03; OR= 2.98）, and presence of microvascular invasion （P= 0.01; OR=4.89） were the risk factors in the fatal recurrence group. The 48.1% of the patients who had all the three risk factors and the 220 of those who had two risk factors experienced fatal recurrence within 6 mo after surgery. CONCLUSION： Three distinct risk factors for immediate post-operative fatal recurrence of HCC after curative resection are pre-operative serum AFP level 〉 1 000 μg/L,tumor size〉6.5 cm, and microvascular invasion. The high risk patients with two or more risk factors should be the candidates for various adjuvant clinical trials.

关键词： Hepatocellular carcinoma Hepatectomy Early recurrence Risk factors

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Deposition and Characterization of (Ba, Sr)RuO3 Oxide Electrode Using TMHD-Based Single Cocktail Source

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Journal of Rare Earths 2004年第Z2期22卷 8-12页

作者： Hyun Chul kim Kyung Il Hong young bae kim Duck Kyun Choi Department of Ceramic Engineering Hanyang University17 Haengdang-dongSeongdong-kuSeoul 133-791Korea Department of Ceramic EngineeringHanyang University17 Haengdang-dongSeongdong-kuSeoul 133-791Korea Department of Ceramic EngineeringHanyang University17 Haengdang-dongSeongdong-kuSeoul 133-791Korea Department of Ceramic EngineeringHanyang University17 Haengdang-dongSeongdong-kuSeoul 133-791Korea

(Ba, Sr)RuO3 has been paid an attention as a promising electrode for (Ba, Sr)TiO3 dielectric material due to its similarity in structure and chemical composition with BST. In this study, (Ba, Sr)RuO3 conductive oxide film was deposited on a 4 inch p-type Si wafer by metal organic chemical vapor deposition (MOCVD) using single cocktail source for the practical device application. Ba(TMHD)2, Sr(TMHD)2, Ru(TMHD)3 precursors and solvent [1-EtylePiPerdine (C7H15 N) ] as starting materials were mixed together for single cocktail source. A liquid delivery system (LDS) and a vaporization cell were utilized for the delivery and vaporization of single cocktail source, respectively. The source feeding rate was controlled by a liquid mass flow controller (LMFC). Deposition parameters, such as the oxygen flow and the source flow rate,were sensitive to phase formation, resistivity and the composition ratio of (Ba, Sr)RuO3 films. Highly (110)-textured (Ba,Sr)RuO3 film was obtained vhen the Ar/O2 ratio was 200/140 sccm at a source flow rate of 0.05 sccm. The process window of stoichiometric composition of BSR film was observed with varying the source flow rate from 0.05 sccm to 0.1 sccm.

关键词： (Ba, Sr)RuO3 (Ba, Sr)TiO3 MOCVD liquid delivery system(LDS) nozzle type injector

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Properties of Ultra-Thin Hafnium Oxide and Interfacial Layer Deposited by Atomic Layer Deposition

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Journal of Rare Earths 2004年第Z2期22卷 21-25页

作者： Taeho Lee young-bae kim Kyung-Il Hong Duck-Kyun Choi Jinho Ahn Department of Material Science&Engineering Hanyang University17 Haengdang-dongSeongdong-guSeoul 133-791Korea Department of Ceramic Engineering Hanyang University17 Haengdang-dongSeongdong-guSeoul 133-791Korea

Ultra-thin hafnium-oxide gate dielectric films deposited by atomic layer deposition technique using HfCl4 and H2O precursor on a hydrogen-terminated Si substrate were investigated. X-ray photoelectron spectroscopy indicates that the interface layer is Hf-silicate rather than phase separated Hf-silicide and silicon oxide structure. The Hf-silicate interfacial layer partially changes into SiOx after high temperature annealing, resulting in a complex HfO2-silicate-SiOx dielectric structure. Electrical measurements confirms that HfO2 on Si is stable up to 700 ℃ for 30 s under N2 ambient.

关键词： atomic layer deposition high-k dielectric HfO2 interface thermal stability

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Expression of Ki-67,p53,and K-ras in chronic pancreatitis and pancreatic ductal adenocarcinoma

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World Journal of Gastroenterology 2005年第43期11卷 6765-6769页

作者： Seok Jeong Don Haeng Lee Jung Il Lee Jin-Woo Lee Kye Sook Kwon Pum-Soo kim Hyung Gil kim Yong Woon Shin young Soo kim young bae kim Division of Gastroenterology Department of Pathology

AIM： To examine surgical specimens of pancreas with either chronic pancreatitis or pancreatic cancer in order to study whether ductal hyperplasia and dysplasia in pancreas represent precursor lesions for pancreatic cancer. METHODS： We examined expression of Ki-67, CEA, p53, and K-ras, in the surgical specimens of pancreas with adenocarcinomas （n = 11） and chronic pancreatitis （n = 12）. Cellular proliferation was assessed by Ki-67 proliferation index using the proliferation marker Ki-67. In specimens with pancreas cancer, we divided pancreas epithelium into normal （n = 7）, ductal hyperplasia （n = 3）, dysplasia （n = 4）, and cancerous lesion （n = 11） after hematoxylin and eosin staining, Ki-67, and CEA immunohistochemical staining. In cases with chronic pancreatitis, the specimen was pathologically examined as in cases with pancreas cancer, and they were also determined as normal （n = 10）, ductal hyperplasia （n = 4）, or dysplasia （n = 5）. p53 and K-ras expression were also studied by immunohistochemical staining. RESULTS： In pancreatic cancer, the Ki-67 index was 3.73±3.58 in normal site, 6.62±4.39 in ductal hyperplasia, 13.47：1：4.02 in dysplasia and 37.03±10.05 in cancer tissue, respectively. Overall, p53 was positive in normal ducts, ductal hyperplasia, dysplasia, and carcinoma cells in 0 of 14 （0%）, 0 of 7 （0%）, 7 of 9 （78%）, and 10 of 11 （91%）, respectively, and K-ras was positive in 0 of 8 （0%）, 1 of 3 （33%）, 4 of 6 （67%）, 4 of 5 （80%）, respectively. CONCLUSION： Our results favorably support the hypothesis that ductal hyperplasia and dysplasia of the pancreas might be precursor lesions for pancreas cancer. Further evaluation of oncogenes by the molecular study is needed.

关键词： Ki-67 p53 K-ras Chronic pancreatitis Pancreatic ductal adenocarcinoma

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Risk factor for ischemic-type biliary lesion after ABO-incompatible living donor liver transplantation

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World Journal of Gastroenterology 2016年第30期22卷 6925-6935页

作者： Jun bae Bang Bong-Wan kim young bae kim Hee-Jung Wang Hyun Yeong Lee Joohyun Sim Taegyu kim Kyeong Lok Lee Xu-Guang Hu Wei Mao Department of Liver Transplantation and Hepatobiliary Surgery Ajou University School of Medicine Department of Pathology Ajou University School of Medicine Department of Biostatistics Ajou University School of Medicine

AIM: To evaluate the risk factors for ischemic-type biliary lesion(ITBL) after ABO-incompatible(ABO-I) adult living donor liver transplantation(ALDLT).METHODS: Among 141 ALDLTs performed in our hospital between 2008 and 2014, 27(19%) were ABO-I ALDLT and 114 were ABO-identical/compatible ALDLT. In this study, we extensively analyzed the clinico-pathological data of the 27 ABO-I recipients to determine the risk factors for ITBL after ABO-I ALDLT. All ABO-I ALDLT recipients underwent an identical B-cell depletion protocol with preoperative rituximab, plasma exchange(PE), and operative splenectomy. The median follow-up period after transplantation was 26 mo. The clinical outcomes of the 27 ABO-I ALDLT recipients were compared with those of 114 ABO-identical/compatible ALDLT ***: ITBL occurred in four recipients(14.8%) between 45 and 112 d after ABO-I ALDLT. The overall survival rates were not different between ABO-I ALDLT and ABO-identical/compatible ALDLT(P = 0.303). Among the ABO-I ALDLT recipients, there was no difference between patients with ITBL and those without ITBL in terms of B-cell and T-cell count, serum isoagglutinin titers, number of PEs, operative time and transfusion, use of graft infusion therapy, or number of remnant B-cell follicles and plasma cells in the spleen. However, the perioperative NK cell counts in the blood of patients with ITBL were significantly higher than those in the patients without ITBL(P 150/μL and postoperative NK cell count > 120/μL were associated with greater relative risks(RR) for development of ITBL(RR = 20 and 14.3, respectively, P < 0.05). CONCLUSION: High NK cell counts in a transplant recipient's blood are associated with ITBL after ABO-I ALDLT. Further research is needed to elucidate the molecular mechanism of NK cell involvement in the development of ITBL.

关键词： Liver transplantation ABO-incompatibility Ischemic-type biliary lesion Natural killer cell

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Cancer-associated fibroblast-derived secreted phosphoprotein 1 contributes to resistance of hepatocellular carcinoma to sorafenib and lenvatinib

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Cancer Communications 2023年第4期43卷 455-479页

作者： JungWoo Eun Jung Hwan Yoon Hye Ri Ahn Seokhwi kim young bae kim Su Bin Lim Won Park TaeWook Kang Geum Ok baek Moon Gyeong Yoon Ju A Son Ji HyangWeon Soon Sun kim Hyo Jung Cho Jae Youn Cheong Department of Gastroenterology Ajou University School of MedicineSuwonSouth Korea Department of Pathology College of MedicineThe Catholic University of KoreaSeoulSouth Korea Department of Biomedical Sciences AjouUniversity Graduate School of MedicineSuwonSouth Korea Department of Pathology Ajou University School of MedicineSuwonSouth Korea Department of Biochemistry&Molecular Biology Ajou University School of MedicineSuwonSouth Korea The Moagen IncDaejeonSouth Korea

Background:Cancer-associated fibroblasts(CAFs)play an important role in the induction of *** study aimed to clarify the mechanism underlying CAF-mediated resistance to two tyrosine kinase inhibitors(TKIs),sorafenib and lenvatinib,and to identify a novel therapeutic target for overcoming TKI resistance in hepatocellular carcinoma(HCC).Methods:We performed a systematic integrative analysis of publicly available gene expression datasets and whole-transcriptome sequencing data from 9 pairs of CAFs and para-cancer fibroblasts isolated from human HCC and para-tumor tissues,respectively,to identify key molecules that might induce resistance to *** then performed in vitro and in vivo experiments to validate selected targets and related *** associations of plasma secreted phosphoprotein 1(SPP1)expression levels before sorafenib/lenvatinib treatment with progression-free survival(PFS)and overall survival(OS)of 54 patients with advanced HCC were evaluated using Kaplan-Meier and Cox regression ***:Bioinformatic analysis identified CAF-derived SPP1 as a candidate molecule driving TKI ***1 inhibitors reversed CAF-induced TKI resistance in vitro and in ***-derived SPP1 activated rapidly accelerated fibrosarcoma(RAF)/mitogen-activated protein kinase(MAPK)and phosphatidylinositol 3-kinase(PI3K)/protein kinase B(AKT)/mammalian target of rapamycin(mTOR)through the integrin-protein kinase C-alpha(PKCα)signaling pathway and promoted epithelial-to-mesenchymal transition(EMT).A high plasma SPP1 level before TKI treatment was identified as an independent predictor of poor PFS(P=0.026)and OS(P=0.047)in patients with advanced HCC after TKI ***:CAF-derived SPP1 enhances TKI resistance in HCC via bypass activation of oncogenic signals and EMT *** inhibition represents a promising therapeutic strategy against TKI resistance ***,plasma SPP1 level before TKI treatment represents a potential biomar

关键词： drug resistance epithelial-to-mesenchymal transition hepatocellular carcinoma secreted phosphoprotein 1

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Diagnosis of gastric epithelial neoplasia:Dilemma for Korean pathologists

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World Journal of Gastroenterology 2011年第21期17卷 2602-2610页

作者： Joon Mee kim Mee-Yon Cho Jin Hee Sohn Dae young Kang Cheol Keun Park Woo Ho kim So-young Jin Kyoung Mee kim Hee Kyung Chang Eunsil Yu Eun Sun Jung Mee Soo Chang Jong Eun Joo Mee Joo Youn Wha kim Do Youn Park Yun Kyung Kang Sun Hoo Park Hye Seung Han young bae kim Ho Sung Park Yang Seok Chae Kye Won Kwon Hee Jin Chang The Gastrointestinal Pathology Study Group of Korean Society of Pathologists Department of Pathology Inha University Hospital Department of Pathology Yonsei University Wonju College of Medicine Wonju Christian Hospital Department of Pathology Sungkyunkwan University School of MedicineKangbuk Samsung Medical Center Department of Pathology Chungnam National University College of Medicine Department of Pathology Sungkyunkwan University School of MedicineSamsung Medical Center Department of Pathology Seoul National University College of Medicine Department of Pathology Soonchunhyang University Hospital Department of Pathology Kosin University College of Medicine Department of Pathology University of Ulsan College of MedicineAsan Medical Center Department of Pathology The Catholic University of KoreaSeoul St.Mary's Hospital Department of Pathology Seoul National University Boramae Hospital Department of Pathology Eulji General Hospital Department of Pathology Inje University Ilsan Paik Hospital Department of Pathology Kyunghee University College of Medicine Department of Pathology Pusan National University College of Medicine Department of Pathology Inje University Seoul Paik Hospital Department of Pathology Korea Cancer Center Hospital Department of Pathology Konkuk University Medical Center Department of Pathology Ajou University School of Medicine Department of Pathology Chonbuk National University Medical School Department of Pathology Korea University College of Medicine Department of Pathology Bundang Jesaeng Hospital Department of Pathology National Cancer Center The Korean Society of Pathologists 4FThe Korean Medical Association BuildingSeoul 140-721South Korea

The histopathological diagnosis of gastric mucosal biopsy and endoscopic mucosal resection/endoscopic submucosal dissection specimens is important,but the diagnostic criteria,terminology,and grading system are not the same in the East and West.A structurally invasive focus is necessary to diagnose carcinoma for most Western pathologists,but Japanese pathologists make a diagnosis of cancer based on severe dysplastic cytologic atypia irrespective of the presence of *** the Vienna classification was introduced to reduce diagnostic discrepancies,it has been difficult to adopt due to different concepts for gastric epithelial neoplastic *** pathologists experience much difficulty making a diagnosis because we are influenced by Japanese pathologists as well as Western *** is geographically close to Korea,and academic exchanges are ***,Korean doctors are familiar with Western style medical *** a result,the terminology,definitions,and diagnostic criteria for gastric intraepithelial neoplasia are very heterogeneous in *** solve this problem,the Gastrointestinal Pathology Study Group of the Korean Society of Pathologists has made an effort and has suggested guidelines for differential diagnosis:(1) a diagnosis of carcinoma is based on invasion;(2) the most important characteristic of low grade dysplasia is the architectural pattern such as regular distribution of crypts without severe branching,budding,or marked glandular crowding;(3) if nuclear pseudostratification occupies more than the basal half of the cryptal cells in three or more adjacent crypts,the lesion is considered high grade dysplasia;(4) if severe cytologic atypia is present,careful inspection for invasive foci is necessary,because the risk for invasion is very high;and(5) other structural or nuclear atypia should be evaluated to make a final decision such as cribriform pattern,papillae,ridges,vesicular nuclei,high nuclear/cytoplasmic ratio,loss

关键词： Intraepithelial neoplasia Stomach Dysplasia Adenoma Carcinoma Japanese Western Consensus Vienna

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A New Encryption Mechanism Supporting the Update of Encrypted Data for Secure and Efficient Collaboration in the Cloud Environment

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 813-834页

作者： Chanhyeong Cho Byeori kim Haehyun Cho Taek-young Youn Department of Cyber Security Dankook UniversityYongin16890Republic of Korea Department of Software Soongsil UniversitySeoul07027Republic of Korea

With the rise of remote collaboration,the demand for advanced storage and collaboration tools has rapidly ***,traditional collaboration tools primarily rely on access control,leaving data stored on cloud servers vulnerable due to insufficient *** paper introduces a novel mechanism that encrypts data in‘bundle’units,designed to meet the dual requirements of efficiency and security for frequently updated collaborative *** bundle includes updated information,allowing only the updated portions to be reencrypted when changes *** encryption method proposed in this paper addresses the inefficiencies of traditional encryption modes,such as Cipher Block Chaining(CBC)and Counter(CTR),which require decrypting and re-encrypting the entire dataset whenever updates *** proposed method leverages update-specific information embedded within data bundles and metadata that maps the relationship between these bundles and the plaintext *** utilizing this information,the method accurately identifies the modified portions and applies algorithms to selectively re-encrypt only those *** approach significantly enhances the efficiency of data updates while maintaining high performance,particularly in large-scale data *** validate this approach,we conducted experiments measuring execution time as both the size of the modified data and the total dataset size *** show that the proposed method significantly outperforms CBC and CTR modes in execution speed,with greater performance gains as data size ***,our security evaluation confirms that this method provides robust protection against both passive and active attacks.

关键词： Cloud collaboration mode of operation data update efficiency

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Prominent cycling reversibility and kinetics enabled by CaTiO3 protective layer on Zn metal for aqueous Zn-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 245-258页

作者： Gaeun Lee Yong Nam Ahn Seongjoon So Chanwoo Park Jong-Seong bae Taehyun Park Il Tae kim Jaehyun Hur School of Chemical Biological and Battery Engineering Gachon University Seongnam Busan Center Korea Basic Science Institute

Aqueous Zn-ion batteries （AZIBs） have received considerable attention owing to their various advantages such as safety,low cost,simple battery assembly conditions,and high ionic ***,they still suffer from serious problems,including uncontrollable dendrite growth,corrosion,hydrogen evolution reaction （HER） from water decomposition,electrode passivation,and unexpected *** creation of a uniform artificial nanocrystal layer on the Zn anode surface is a promising strategy for resolving these ***,we propose the use of a perovskite CaTiO3（CTO） protective layer on Zn（CTO@Zn） as a promising approach for improving the performance of *** CTO artificial layer provides an efficient pathway for Zn ion diffusion towards the Zn metal because of the high dielectric constant （εr=180） and ferroelectric characteristics that enable the alignment of dipole moments and redistribute the Zn2+ions in the CTO *** avoiding the direct contact of the Zn anode with the electrolyte solution,the uneven dendrite growth,corrosion,parasitic side reactions,and HER are mitigated,while CTO retains its mechanical and chemical robustness during ***,CTO@Zn demonstrates an improved lifespan in a symmetric cell configuration compared with bare ***@Zn shows steady overpotential （～68 m V） for 1500 h at 1 mA cm-2/0.5 mA h cm-2,excelling bare ***,when paired with the V2O5-C cathode,the CTO@Zn//V2O5-C full battery delivers 148.4 mA h g-1（based on the mass of the cathode） after 300 *** study provides new insights into Zn metal anodes and the development of high-performance AZIBs.

关键词： Artificial layer Dielectric constant Zn metal anode Zinc aqueous battery

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Maximizing biomass utilization: An integrated strategy for coproducing multiple chemicals

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Journal of Energy Chemistry 2025年第1期100卷 180-191页

作者： Byeongchan Ahn Sua Jo Jonggeol Na J.Jay Liu young-Ju kim Wangyun Won Department of Chemical and Biological Engineering Korea University Department of Chemical Engineering (Integrated process) Kyung Hee University Department of Chemical Engineering and Materials Science Ewha Womans University Department of Chemical Engineering Pukyong National University Resources Engineering Plant Research Department Korea Institute of Geoscience and Mineral Resources

Lignocellulosic biomass is one of the viable solutions to alleviate the global warming. However, the limited utilization of biomass majorly focused on cellulose and hemicellulose restricts the economic and environmental feasibilities. To cope with this issue, we proposed an integrated process of co-producing 1,6-hexanediol（1,6-HDO） with tetrahydrofuran and adipic acid from biomass, referred to as Strategy A. To compare the impacts of lignin upgrading and feedstock, Strategy B, which co-produces tetrahydrofuran alone, and Strategy C, which is the traditional route to produce 1,6-HDO from fossil fuels, were used. Heat networks are also designed to reduce operating costs and indirect carbon emissions due to energy consumption, saving 87% and 83% of the heat and cooling requirements, respectively, in Strategy A. The market competitiveness of Strategy A was evaluated by determining the minimum selling price through techno-economic analysis, and sustainability was thoroughly investigated by quantifying the environmental impacts through both midpoint and endpoint life-cycle assessments（LCAs）.Strategy A was found to be the most favorable both economically（USRDSCHARDOLLAR3,402/ton） and environmentally（-26.9 kg CO2eq.）. This indicates that lignin valorization is not only economically but also environmentally preferred. Finally, changes in economic and environmental feasibilities depending on economic, process, and environmental parameters were investigated using sensitivity and uncertainty analyses. The results of these analyses provide valuable insight into bio-based chemical production.

关键词： Biorefinery Carbon mitigation Climate change Global warming Lignin utilization Bioeconomy

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