检索结果-南通市图书馆

Effect of CaF2 content in refining slag on formation behavior of spinel inclusion in Ni-Cr-V-alloyed special steel

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2018年第2期25卷 157-163页

作者： jae-hong Shin joo-hyun Park Department of Materials Engineering Hanyang UniversityAnsan 426-791 Korea

The influence of CaF2 content on the formation behavior of spinel inclusions in the Ni-Cr-V-alloyed special steel was presented. The spinel was not formed at CaF2 content lower than 10 wt%. However, it was formed at early stage when the CaF2 content was greater than 30 wt%, followed by a modification to the aluminosilicate-type inclusions. Because the slag was saturated by MgO, the activity of MgO was unity irrespective of CaF2 content in the slag. Thus, Mg was transferred from slag to metal phase. Mg transferred to molten steel reacted with Al2O3-rich inclusions to form ***2O3 spinel. However, the spinel inclusion was modified to aluminosilicate-type inclusions by the reaction with Si and Ca transferred from slag to molten steel about 2-3 h later.

关键词： Spinel inclusion Refining slag CaF2 content Ni-Cr-V-alloyed special steel

MYB46-Mediated Transcriptional Regulation of Secondary Wall Biosynthesis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2012年第5期5卷 961-963页

作者： jae-Heung Ko won-Chan Kim joo-Yeol Kim Sung-Ju Ahn Kyung-Hwan Han Department of Plant and Environmental New Resources Kyung Hee University Yongin Korea Bioenergy Center Kyung Hee University Yongin Korea Department of Horticulture and Department of Forestry Michigan State University East Lansing MI 48824-1222 USA DOE-Great Lakes Bioenergy Research Center Michigan State University East Lansing MI 48824-1222 USA Department of Bioenergy Science and Technology (WCU) Chonnam National University 333 Yongbongro Buk-gu Gwangju 500-757 Korea

Formation of secondary wall requires coordinated transcrip- tional regulation of the genes involved in the biosynthesis of major secondary wall components （e.g. cellulose, hemicellu- lose, and lignin）. Even though many aspects of plant biology have been extensively elucidated using various model spe- cies, our current understanding of secondary wall formation is limited.

关键词： Biosynthesis Regulation Wall

Metastasis to the gallbladder:A single-center experience of 20 cases in South Korea

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第38期15卷 4806-4809页

作者： won jae Yoon Yong Bum Yoon Youn joo Kim Ji Kon Ryu Yong-Tae Kim Department of Internal Medicine Seoul National University College of Medicine Department of Internal Medicine Korea Cancer Center Hospital

AIM： To evaluate the clinicopathologic characteristics of patients with metastases to the gallbladder （MGBs）. METHODS： We performed a single-center retrospective study of 20 patients with MGBs diagnosed pathologically from 1999 to 2007. RESULTS： Among 417 gallbladder （GB） malignancies, 20 （4.8%） were MGBs. The primary malignancies originated from the stomach （n = 8）, colorectum （n = 3）, liver （n = 2）, kidney （n = 2）, skin （n = 2）, extrahepatic bile duct （n = 1）, uterine cervix （n = 1）, and appendix （n = 1）. Twelve patients were diagnosed metachronously, presenting with cholecystitis （n = 4）, abdominal pain （n = 2）, jaundice （n = 1）, weight loss （n = 1）, and serum CA 19-9 elevation （n = 1）; five patients were asymptomatic. The median survival after the diagnosis of MGB was 8.7 mo. On Cox regression analysis, R0 resection was the only factor associated with a prolonged survival [hazard ratio （HR）： 0.01, P = 0.002]; presentation with cholecystitis was associated with poor survival （HR： 463.27, P = 0.006）. CONCLUSION： MGBs accounted for 4.8% of all pathologically diagnosed GB malignancies. The most common origin was the stomach. The median survival of MGI3 was 8.7 mo.

关键词： Gallbladder Neoplasms Gastrointestinalneoplasms Neoplasm metastasis Biliary tract neoplasms

Risk of sedation for diagnostic esophagogastroduodenoscopy in obstructive sleep apnea patients

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第29期19卷 4745-4751页

作者： jae Myung Cha Jung won Jeun Kwan Mi Pack Joung Il Lee Kwang Ro joo Hyun Phil Shin won-Chul Shin Department of Internal Medicine Kyung Hee University Hospital at Gang Dong Seoul 134-727 South Korea Department of Neurology Kyung Hee University Hospital at Gang Dong Seoul 134-727 South Korea

AIM: To investigate whether patients with obstructive sleep apnea (OSA) are at risk of sedation-related complications during diagnostic esophagogastroduodenoscopy (EGD). METHODS: A prospective study was performed in consecutive patients with OSA, who were confirmed with full-night polysomnography between July 2010 and April 2011. The occurrence of cardiopulmonary complications related to sedation during diagnostic EGD was compared between OSA and control groups. RESULTS: During the study period, 31 patients with OSA and 65 controls were enrolled. Compared with the control group, a higher dosage of midazolam was administered (P = 0.000) and a higher proportion of deep sedation was performed (P = 0.024) in the OSA group. However, all adverse events, including sedation fail-ure, paradoxical responses, snoring or apnea, hypoxia, hypotension, oxygen or flumazenil administration, and other adverse events were not different between the two groups (all P > 0.1). Patients with OSA were not predisposed to hypoxia with multivariate logistic regression analysis (P = 0.068). CONCLUSION: In patients with OSA, this limited sized study did not disclose an increased risk of cardiopulmonary complications during diagnostic EGD under sedation.

关键词： Conscious sedation Obstructive sleep apnea Endoscopy Complications Safety

Comparison of hepatic venous pressure gradient and endoscopic grading of esophageal varices

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2016年第11期22卷 3212-3219页

作者： Eun Ji Lee Yong jae Kim Dong Erk Goo Seung Boo Yang Hyun-joo Kim jae Young Jang Soung won Jeong Department of Radiology Soonchunhyang University Seoul Hospital Department of Radiology Soonchunhyang University Gumi Hospital Department of Gastroenterology Soonchunhyang University Seoul Hospital

AIM: To determine the correlation between the hepatic venous pressure gradient and the endoscopic grade of esophageal ***: From September 2009 to March 2013, a total of 176 measurements of hepatic venous pressure gradient (HVPG) were done in 146 patients. Each transjugular HVPG was measured twice, first using an end whole catheter (EH-HVPG), and then using a balloon catheter (B-HVPG). The HVPG was compared with the endoscopic grade of esophageal varices (according to the general rules for recording endoscopic findings of esophagogastric varices), which was recorded within a month of the measurement of ***: The study included 110 men and 36 women, with a mean age of 56.1 years (range, 43-76 years). The technical success rate of the pressure measurements was 100% and there were no complication related to the procedures. Mean HVPG was 15.3 mmHg as measured using the end hole catheter method and 16.5 mmHg as measured using the balloon catheter method. Mean HVPG (both EH-HVPG and B-HVPG) was not significantly different among patients with different characteristics, including sex and comorbid factors, except for cases with hepatocellular carcinoma (B-HVPG, P = 0.01; EH-HVPG, P = 0.02). Portal hypertension (> 12 mmHg HVPG) occurred in 66% of patients according to EH-HVPG and 83% of patients according to B-HVGP, and significantly correlated with Child’s status (B-HVPG, P < 0.000; EH-HVGP, P < 0.000) and esophageal varies observed upon endoscopy (EH-HVGP, P = 0.003; B-HVGP, P = 0.006). One hundred and thirty-five endoscopies were performed, of which 15 showed normal findings, 27 showed grade 1 endoscopic esophageal varices, 49 showed grade 2 varices, and 44 showed grade 3 varices. When comparing endoscopic esophageal variceal grades and HVPG using univariate analysis, the P value was 0.004 for EH-HVPG and 0.002 for ***: Both EH-HVPG and B-HVPG showed a positive correlation with the endoscopic grade of esophag

关键词： Hepatic venous pressure gradient Liver cirrhosis Esophageal varices Endoscopic grade of esophageal varices Balloon catheter measurement End hole catheter measurement

Proton pump inhibitor administration delays rebleeding after endoscopic gastric variceal obturation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第45期20卷 17127-17131页

作者： won Seok Jang Hyun Phil Shin Joung Ⅱ Lee Kwang Ro joo jae Myung Cha Jung won Jeon Jun Uk Lim Department of Internal Medicine College of Medicine Kyung Hee University

AIM: To clarify the efficacy of proton pump inhibitors (PPIs) after endoscopic variceal obturation (EVO) with N-butyl-2-cyanoacrylate.

关键词： Cirrhosis Endoscopic variceal obturation N-butyl-2-cyanoacrylate Proton pump inhibitor Rebleeding interval

Endoscopic submucosal dissection for early gastric cancer:Quo vadis?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2011年第21期17卷 2623-2625页

作者： won Young Cho joo Young Cho Il Kwun Chung Jin Il Kim Jin Seok Jang jae Hak Kim Institute for Digestive Research Digestive Disease CenterSoonchunhyang University College of Medicine Department of Internal Medicine Soonchunhyang University College of Medicine Department of Internal Medicine College of MedicineThe Catholic University of KoreaSeoul Department of Internal Medicine Dong-A University College of Medicine Department of Internal Medicine Dongguk University College of Medicine

The diagnosis of early gastric cancer(EGC) is of great interest because its endoscopic and surgical treatment presents the best chance for a *** technical development,endoscopic submucosal dissection(ESD) has been widely performed for the curative treatment of EGC in *** studies of ESD for EGC will be the next missions that overcome these limitations and global guidelines will be processed for ESD for EGC.

关键词： Endoscopic submucosal dissection Early gastric cancer

Dopant-Tunable Ultrathin Transparent Conductive Oxides for Efficient Energy Conversion Devices

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第12期13卷 437-451页

作者： Dae Yun Kang Bo-Hyun Kim Tae Ho Lee jae won Shim Sungmin Kim Ha-Jun Sung Kee joo Chang Tae Geun Kim School of Electrical Engineering Korea UniversitySeoul 02841Republic of Korea Department of Advanced Materials Engineering Kongju National UniversityCheonan 31080Republic of Korea Department of Physics Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea

Ultrathin film-based transparent conductive oxides(TCOs)with a broad work function(WF)tunability are highly demanded for e cient energy conversion ***,reducing the film thickness below 50 nm is limited due to rapidly increasing resistance;furthermore,introducing dopants into TCOs such as indium tin oxide(ITO)to reduce the resistance decreases the transparency due to a trade-o between the two ***,we demonstrate dopant-tunable ultrathin(≤50 nm)TCOs fabricated via electric field-driven metal implantation(m-TCOs;m=Ni,Ag,and Cu)without com-promising their innate electrical and optical *** m-TCOs exhibit a broad WF variation(0.97 eV),high transmittance in the UV to visible range(89–93%at 365 nm),and low sheet resistance(30–60Ωcm-2).Experimental and theoretical analyses show that interstitial metal atoms mainly a ect the change in the WF without substantial losses in optical *** m-ITOs are employed as anode or cathode electrodes for organic light-emitting diodes(LEDs),inorganic UV LEDs,and organic photovoltaics for their universal use,leading to outstanding performances,even without hole injection layer for OLED through the WF-tailored *** results verify the proposed m-TCOs enable e ective carrier transport and light extraction beyond the limits of traditional TCOs.

关键词： Transparent conductive oxide Metal implantation High transparency Low sheet resistance Work function

Stents for colorectal obstruction:Past,present,and future

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2016年第2期22卷 842-852页

作者： Eui joo Kim Yoon jae Kim Department of Internal Medicine Gachon University Gil Medical CenterIncheon 405-760South Korea

Since the development of uncovered self-expanding metal stents(SEMS) in the 1990 s, endoscopic stents have evolved dramatically. Application of new materialsand new designs has expanded the indications for enteral SEMS. At present, enteral stents are considered the first-line modality for palliative care, and numerous types of enteral stents are under development for extended clinical usage, beyond a merely palliative purpose. Herein, we will discuss the current status and the future development of lower enteral stents.

关键词： Colon Obstruction Stent Self-expandingmetal stents Self-expanding metal stents