检索结果-南通市图书馆

Towards high-performance and robust anion exchange membranes(AEMs)for water electrolysis:Super-acid-catalyzed synthesis of AEMs

引用

Journal of Energy Chemistry 2024年第6期93卷 478-510,I0012页

作者： geun woong ryoo Sun Hwa Park Ki Chang Kwon Jong Hun Kang Ho Won Jang Min Sang Kwon Department of Materials Science and Engineering Research Institute of Advanced Materials(RIAM)Seoul National UniversitySeoul 08826Republic of Korea Interdisciplinary Materials Measurement Institute Korea Research Institute of Standards and Science(KRISS)Daejeon 34113Republic of Korea Department of Chemical and Biological Engineering and Institute of Chemical ProcessSeoul National UniversitySeoul 08826Republic of Korea Department of Applied Measurement Science University of Science and TechnologyDaejeon 34113Republic of Korea

The increasing demand for hydrogen energy to address environmental issues and achieve carbon neutrality has elevated interest in green hydrogen production,which does not rely on fossil *** various hydrogen production technologies,anion exchange membrane water electrolyzer(AEMWE)has emerged as a next-generation technology known for its high hydrogen production efficiency and its ability to use non-metal ***,this technology faces significant challenges,particularly in terms of the membrane durability and low ionic *** address these challenges,research efforts have focused on developing membranes with a new backbone structure and anion exchange groups to enhance durability and ionic ***,the super-acid-catalyzed condensation(SACC)synthesis method stands out due to its user convenience,the ability to create high molecular weight(MW)polymers,and the use of oxygen-tolerant organic *** the synthesis of anion exchange membranes(AEMs)using the SACC method began in 2015,and despite growing interest in this synthesis approach,there remains a scarcity of review papers focusing on AEMs synthesized using the SACC *** review covers the basics of SACC synthesis,presents various polymers synthesized using this method,and summarizes the development of these polymers,particularly their building blocks including aryl,ketone,and anion exchange *** systematically describe the effects of changes in the molecular structure of each polymer component,conducted by various research groups,on the mechanical properties,conductivity,and operational stability of the *** review will provide insights into the development of AEMs with superior performance and operational stability suitable for water electrolysis applications.

关键词： Green hydrogen production Water electrolysis Anion exchange membrane water electrolyzer(AEMWE) Anion exchange membranes(AEMs) Super-acid-catalyzed condensation(SACC)

来源：

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

Monitoring of non-point source pollutants load from a mixed forest land use

引用

Journal of Environmental Sciences 2010年第6期22卷 801-805页

作者： Sung Wan Yoon Se woong Chung Dong geun Oh Jae Woon Lee Department of Environmental Engineering Chungbuk National University Geum River Environmental Research Center National Institute of Environmental Research

The aim of this study was to determine the unit load of NPS （non-point source） pollutants including organic variables such as BOD （biochemical oxygen demand）, COD （chemical oxygen demand） and DOC （dissolved organic carbon）, nitrogen and phosphorus constituents, and suspended solids （SS） and their event mean concentration （EMC） of runoff flows from a water-shed of mixed forest land use by intensive field experiments. Field monitoring for continuous measurements of rainfall, flow, and water quality was conducted over 12 storm events during 2008-2009 using automated and manual sampling methods. The EMCs of individual runoff event were estimated for each water quality constituent based on the flow rate and concentration data of runoff discharge. The average EMCs of BOD, COD, DOC, SS, TN （total nitrogen）, NH4^＋-N, NO3^--N, TP （total phosphorus）, PO4^3-P from the mixed forest land were 1.794, 3.498, 1.462, 10.269, 0.862, 0.044, 0.634, 0.034, and 0.005 mg/L, respectively. The annual unit loads of BOD, COD, DOC, SS, TN, NH4^＋-N, NO3^--N, TP and PO4^3--P were estimated as 66.9, 133.2, 55.5, 429.8, 36.5, 1.6, 26.9, 1.3 and 0.1 kg/（ha·yr）, respectively. In addition, affecting parameters on the EMCs were investigated by statistic analysis of the field data. As a result, significant correlations with precipitation, rainfall intensity, and total runoff flows were found in most constituents.

关键词： event mean concentration mixed forest land use non-point source pollutant load unit load

来源：

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

Associated factors for a hyperechogenic pancreas on endoscopic ultrasound

引用

World Journal of Gastroenterology 2010年第34期16卷 4329-4334页

作者： Cheol woong Choi Gwang Ha Kim Dae Hwan Kang Hyung Wook Kim Dong Uk Kim Jeong Heo geun Am Song Do Youn Park Suk Kim Department of Internal Medicine Pusan National University School of Medicine and the Medical Research Institute Pusan National University Hospital Department of Internal Medicine Pusan National University School of Medicine and the Medical Research Institute Department of Pathology Pusan National University School of Medicine and the Medical Research Institute Department of Radiology Pusan National University School of Medicine and the Medical Research Institute

AIM: To identify the associated risk factors for hyperechogenic pancreas (HP) which may be observed on endoscopic ultrasound (EUS) and to assess the relationship between HP and obesity. METHODS: From January 2007 to December 2007, we prospectively enrolled 524 consecutive adults who were scheduled to undergo EUS. Patients with a history of pancreatic disease or with hepatobiliary or advanced gastrointestinal cancer were excluded. Finally,284 patients were included in the analyses. We further analyzed the risk of HP according to the categories of visceral adipose tissue (VAT) and subcutaneous adipose tissue in 132 patients who underwent abdominal computed tomography scans. RESULTS: On univariate analysis, age older than 60 years, obesity (body mass index > 25 kg/m 2 ), fatty liver, diabetes mellitus, hypertension and hypercholesterolemia were identified as risk factors associated with HP (P < 0.05). On multivariate analysis, fatty liver [P = 0.008, odds ratio (OR) = 2.219], male gender (P = 0.013, OR = 2.636), age older than 60 years (P = 0.001, OR = 2.874) and hypertension (P = 0.044, OR = 2.037) were significantly associated with HP. In the subgroup analysis, VAT was a statistically significant risk factor for HP (P = 0.010, OR = 5.665, lowest quartile vs highest quartile). CONCLUSION: HP observed on EUS was associated with fatty liver, male gender, age older than 60 years, hypertension and VAT.

关键词： Endoscopic Ultrasound Hyperechogenic pancreas Obesity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Is obesity associated with gastropharyngeal reflux disease?

引用

World Journal of Gastroenterology 2008年第2期14卷 265-271页

作者： Cheol woong Choi Gwang Ha Kim Chul Soo Song Soo geun Wang Byung Joo Lee Hoseok I Dae Hwan Kang geun Am Song Department of Internal Medicine Pusan National University School of Medicine Busan Korea Department of Otolaryng-ology Pusan National University School of Medicine Busan Korea Department of Chest Surgery Pusan National University School of Medicine Busan Korea

AIM: To examine the association between obesity and gastropharyngeal reflux disease (GPRD) as well as gastroesophageal reflux disease (GERD) METHODS: We conducted a cross-sectional study of consecutive patients undergoing ambulatory 24-h dual-probe pH monitoring from July 2003 to December 2006. The association between body mass index (BMI) and parameters about gastroesophageal or gastropharyngeal reflux was examined in univariate and multivariate ***: A total of 769 patients (307 men and 462 women; mean age 50.7 years) were finally enrolled. Most variables showing gastroesophageal reflux was higher in the obese patients than the patients with normal BMI. There was no difference in all the variables showing gastropharyngeal reflux according to the BMI. After adjustment for age, sex, alcohol intake and smoking, obese patients demonstrated an about 2-fold increase in risk of GERD compared with patients with normal BMI (OR, 1.9; 95 CI, 1.3-2.9), but overweight patients did not demonstrate increased risk of GERD (OR, 1.2; 95 CI, 0.8-1.7). Both obese patients and overweight patients did not demonstrated increased risk of GPRD compared with patients with normal BMI (OR, 1.1; 95 CI, 0.8-1.7; and OR, 0.9; 95 CI, 0.6-1.3, respectively).CONCLUSION: Obesity is not associated with GPRD reflux while it is associated with GERD.

关键词： Obesity Body mass index Gastroesophageal reflux Gastropharyngeal reflux

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

New-onset diabetes after adult liver transplantation in the Korean Organ Transplantation Registry (KOTRY) study

引用

Hepatobiliary Surgery and Nutrition 2020年第4期9卷 425-439页

作者： Jong Man Kim Shin Hwang Kwang-woong Lee Jae-geun Lee Je Ho Ryu Bong-Wan Kim Dong Lak Choi Young Kyoung You Dong-Sik Kim Yang Won Nah Koo Jeong Kang Jai Young Cho geun Hong In Seok Choi Hee Chul Yu Dongho Choi Myoung Soo Kim 无 Department of Surgery Samsung Medical CenterSungkyunkwan University School of MedicineSeoulSouth Korea Department of Surgery Asan Medical CenterCollege of Medicine University of UlsanSouth Korea Department of Surgery Seoul National University College of MedicineSeoulSouth Korea Department of Surgery Yonsei University College of MedicineSeoulSouth Korea Department of Surgery Pusan National University College of MedicineBusanSouth Korea Department of Liver Transplantation and Hepatobiliary Surgery Ajou University School of MedicineSuwonSouth Korea Department of Surgery Catholic University of Daegu College of MedicineDaeguSouth Korea Department of Surgery College of MedicineCatholic University of KoreaSeoulSouth Korea Division of HBP Surgery and Liver Transplantation Department of SurgeryKorea University College of MedicineSeoulSouth Korea Department of Surgery Ulsan University HospitalUniversity of Ulsan College of MedicineUlsanSouth Korea Department of Surgery Keimyung University School of MedicineDaeguSouth Korea Department of Surgery Seoul National University Bundang HospitalSeoul National University College of MedicineSungnamSouth Korea Department of Surgery Ewha Woman’s University School of MedicineSeoulSouth Korea Department of Surgery Konyang University HospitalDaejonSouth Korea Department of Surgery Chonbuk National University School of MedicineJeonjuSouth Korea Department of Surgery Hanyang University College of MedicineSeoulSouth Korea The Korean Organ Transplantation Registry Study Group

Background:New-onset diabetes after transplantation(NODAT)is a serious complication following liver transplantation(LT).The present study aimed to investigate the incidence of and risk factors for NODAT using the Korean Organ Transplantation Registry(KOTRY)***:Patients with history of pediatric transplantation(age≤18 years),re-transplantation,multi-organ transplantation,or pre-existing diabetes mellitus were excluded.A total of 1,919 non-diabetic adult patients who underwent a primary LT between May 2014 and December 2017 were *** factors were identified using Cox regression ***:NODAT occurred in 19.7%(n=377)of adult liver transplant *** analysis showed steroid use,increased age,and high body mass index(BMI)in recipients,and implantation of a left-side liver graft was closely associated with NODAT in adult *** living donor liver transplant(LDLT)patients(n=1,473),open donor hepatectomy in the living donors,steroid use,small for size liver graft(graft to recipient weight ratio≤0.8),increased age,and high BMI in the recipient were predictive factors for *** use of antimetabolite and basiliximab induction reduced the incidence of NODAT in adult LT and in adult ***:Basiliximab induction,early steroid withdrawal,and antimetabolite therapy may prevent NODAT after adult *** BMI or advanced age in liver recipients,open donor hepatectomy in living donors,and small size liver graft can predict the occurrence of NODAT after adult LT or LDLT.

关键词： Diabetes living donors immunosuppression Asia

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Is it possible to differentiate gastric GISTs from gastric leiomyomas by EUS?

引用

World Journal of Gastroenterology 2009年第27期15卷 3376-3381页

作者： Gwang Ha Kim Do Youn Park Suk Kim Dae Hwan Kim Dong Heon Kim Cheol woong Choi Jeong Heo geun Am Song Department of Internal Medicine Pusan National University School of Medicine and Medical Research Institute Pusan National University HospitalBusan 602-739 South Korea Department of Pathology Pusan National University School of MedicineBusan 602-739 South Korea Department of Radiology Pusan National University School of MedicineBusan 602-739 South Korea Department of Surgery Pusan National University School of MedicineBusan 602-739South Korea

AIM: To evaluate the ultrasonog raphy (EUS) features of gastric gastrointestinal stromal tumors (GISTs) as compared with gastric leiomyomas and then to determine the EUS features that could predict malignant ***: We evaluated the endoscopic EUS features in 53 patients with gastric mesenchymal tumors conf irmed by histopathologic diagnosis. The GISTs were classif ied into benign and malignant groups according to the histological risk classif ***: Immunohistochemical analyses demon-strated 7 leiomyomas and 46 GISTs. Inhomogenicity, hyperechogenic spots, a marginal halo and higher echogenicity as compared with the surrounding muscle layer appeared more frequently in the GISTs than in the leiomyomas (P < 0.05). The presence of at least two of these four features had a sensitivity of 89.1% and a specifi city of 85.7% for predicting GISTs. Except for tumor size and irregularity of the border, most of the EUS features were not helpful for predicting the malignant potential of GISTs. On multivariate analysis, only the maximal diameter of the GISTs was an independent predictor. The optimal size for predicting malignant GISTs was 35 mm. The sensitivity and specificity using this value were 92.3% and 78.8%, ***: EUS may help to differentiate gastric GISTs from gastric leiomyomas. Once GISTs are suspected, surgery should be considered if the size is greater than 3.5 cm.

关键词： Endoscopic ultrasonography, Gastrointestinal stromal tumor Stomach

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Somatostatin adjunctive therapy for non-variceal upper gastrointestinal rebleeding after endoscopic therapy

引用

World Journal of Gastroenterology 2011年第29期17卷 3441-3447页

作者： Cheol woong Choi Dae Hwan Kang Hyung Wook Kim Su Bum Park Kee Tae Park Gwang Ha Kim geun Am Song Mong Cho Department of Internal Medicine Pusan National University School of Medicine and Medical Research InstituteYangsan-siGyeongsangnam-do 626-770South Korea

AIM:To evaluate the effect of pantoprazole with a somatostatin adjunct in patients with acute non-variceal upper gastrointestinal bleeding(NVUGIB).METHODS:We performed a retrospective analysis of a prospective database in a tertiary care university *** October 2006 to October 2008,we enrolled 101 patients with NVUGIB that had a high-risk stigma on *** 24 h of hospital admission,all patients underwent endoscopic *** successful endoscopic hemostasis,all patients received an 80-mg bolus of pantoprazole followed by continuous intravenous infusion(8 mg/h for 72 h).The somatostatin adjunct group(n=49)also received a 250-μg bolus of somatostatin,followed by continuous infusion (250μg/h for 72 h).Early rebleeding rates,disappearance of endoscopic stigma and risk factors associated with early rebleeding were ***:Early rebleeding rates were not significantly different between treatment groups(12.2%vs 14.3%,P=0.766).Disappearance of endoscopic stigma on the second endoscopy was not significantly different between treatment groups(94.2%vs 95.9%,P=0.696).Multivariate analysis showed that the complete Rockall score was a significant risk factor for early rebleeding(P =0.044,OR:9.080,95%CI:1.062-77.595).CONCLUSION:The adjunctive use of somatostatin was not superior to pantoprazole monotherapy after successful endoscopic hemostasis in patients with NVUGIB.

关键词： Somatostatin Pantoprazole Gastrointestinal bleeding Rebleeding

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：