检索结果-南通市图书馆

Journal of Geriatric Cardiology 2022年第7期19卷 555-558页

作者： An Shing Ang Ilias Skaltsiotis Theodore Kofidis hee hwa ho Department of Cardiology Tan Tock Seng HospitalSingapore Department of Cardiac Thoracic and Vascular SurgeryNational University HospitalNational University Health SystemSingapore

Coronary artery bypass grafting(CABG)tra-ditionally involves revascularization of the left anterior descending artery(LAD)as it is usually of greater prognostic value.[1]Isolated CABG for non-LAD lesions have also been descri-bed in ***,these were often in the setting of re-do CABG[2,3]or in patients with isol-ated right sided coronary lesion and concomitant valvular heart disease.

关键词： coronary bypass patients

Left ventricular pseudoaneurysm

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2017年第1期14卷 78-80页

作者： hee hwa ho Dasdo Antonius Sinaga Evelyn Lee Timothy James Watson Jimmy Kim Fatt hon Department of Cardiology Tan Tock Hospital Singapore Department of Cardiothoracic Surgery National University Heart Centre Singapore

A 72-year-old elderly male smoker with a known history of hypertension presented with a six day history of chest pain. His blood pressure at presentation was 110/70 mmHg and there was no audible murmur. ECG showed Q waves in the inferior leads (Figure 1A) and troponin level was elevated (14 μg/L). Chest X-ray showed cardiomegaly with linear atelectasis in both lung bases.

关键词：动脉瘤左心室假性毫米汞柱蛋白水平高血压吸烟者心电图

Long cycle-life aqueous Zn battery enabled by facile carbon nanotube coating on Cu current collector

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Carbon Energy 2024年第6期6卷 151-164页

作者： Beom-Keun Cho Sung-ho Huh So hee Kim Seungho Yu Jong-Seong Bae Jung-Keun Yoo Seung-ho Yu Department of Chemical and Biological Engineering Korea UniversitySeoulRepublic of Korea Advanced Analysis Center Korea Institute of Science and Technology(KIST)SeoulRepublic of Korea Energy Storage Research Center Korea Institute of Science and Technology(KIST)SeoulRepublic of Korea KIST School Division of Energy and Environment TechnologyKorea University of Science and TechnologySeoulRepublic of Korea Busan Center Korea Basic Science Institute(KBSI)BusanRepublic of Korea Carbon Composites Department Composites Research DivisionKorea Institute of Materials Science(KIMS)ChangwonRepublic of Korea

As an alternative to Li-ion batteries,aqueous Zn batteries have gained attention due to the abundance of Zn metal,low reduction potential(-0.76 V *** hydrogen electrode),and high theoretical capacity(820 mAh g-1)of multivalent Zn2+***,the growth of Zn dendrites and the formation of irreversible surface reaction byproducts pose challenges for ensuring a long battery lifespan and ***,the Cu foil coated with a single-walled carbon nanotube(SWCNT)layer using a facile doctor blade casting method is *** SWCNT-coated Cu foil demonstrates a significantly longer battery lifespan compared to the bare Cu in the half-cell *** operando optical microscopy imaging,we are able to provide intuitive evidence that Zn deposition occurs between the carbon nanotube(CNT)coating and Cu substrate,in agreement with the computational ***,with various imaging techniques,the flat morphology and homogeneous distribution of Zn beneath the SWCNT layer are *** addition,the full-cell using CNT-coated Cu exhibits a long cycle life compared to the control group,thereby demonstrating improved electrochemical performance with limited Zn for the cycling process.

关键词： aqueous Zn battery carbon nanotube operando imaging surface coating

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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)

A review of understanding electrocatalytic reactions in energy conversion and energy storage systems via scanning electrochemical microscopy

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第4期91卷 155-177页

作者： Jihye Park Jong hwan Lim Jin-Hyuk Kang Jiheon Lim ho Won Jang hosun Shin Sun hwa Park Interdisciplinary Materials Measurement Institute Korea Research Institute of Standards and ScienceDaejeon 34113Republic of Korea Department of Material Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Department of Applied Measurement Science University of Science and TechnologyDaejeon 34113Republic of Korea

To address climate change and promote environmental sustainability,electrochemical energy conversion and storage systems emerge as promising alternative to fossil fuels,catering to the escalating demand for *** optimal energy efficiency and cost competitiveness in these systems requires the strategic design of electrocatalysts,coupled with a thorough comprehension of the underlying mechanisms and degradation behavior occurring during the electrocatalysis *** electrochemical microscopy(SECM),an analytical technique for studying surface electrochemically,stands out as a powerful tool offering electrochemical *** possesses remarkable spatiotemporal resolution,enabling the visualization of the localized electrochemical activity and surface *** review compiles crucial research findings and recent breakthroughs in electrocatalytic processes utilizing the SECM methodology,specifically focusing on applications in electrolysis,fuel cells,and metal–oxygen batteries within the realm of energy conversion and storage *** with an overview of each energy system,the review introduces the fundamental principles of SECM,and aiming to provide new perspectives and broadening the scope of applied research by describing the major research categories within SECM.

关键词： Scanning electrochemical microscopy Electrocatalyst Electrocatalysis Water splitting Fuel cell Metal-oxygen battery

Correlation between hydration properties and electrochemical performances on Ln cation size effect in layered perovskite for protonic ceramic fuel cells

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第1期88卷 1-9,I0001页

作者： Inhyeok Cho Jiwon Yun Boseok Seong Junseok Kim Sun hee Choi ho-Il Ji Sihyuk Choi Department of Mechanical Engineering Kumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Department of Aeronautics Mechanical and Electronic Convergence EngineeringKumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Center for Energy Materials Research Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Center for Hydrogen and Fuel Cell Research Clean Technology Research DivisionKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Department of Energy and Environmental Engineering University of Science and TechnologySeoul 02792Republic of Korea Nanomaterials Science and Engineering Korea University of Science and Technology(UST)KIST CampusSeoul 02792Republic of Korea

PrBa_(0.5)Sr_(0.5)Co_(1.5)Fe_(0.5)O_(5+δ)(PrBSCF) has attracted much research interest as a potential triple ionic and electronic conductor(TIEC) electrode for protonic ceramic fuel cells(PCFCs). The chemical formula for Pr BSCF is AA'B_(2)O_(5+δ), with Pr(A-site) and Ba/Sr(A'-site) alternately stacked along the c-axis. Due to these structural features, the bulk oxygen ion diffusivity is significantly enhanced through the disorder-free channels in the PrO layer;thus, the A site cations(lanthanide ions) play a pivotal role in determining the overall electrochemical properties of layered perovskites. Consequently, previous research has predominantly focused on the electrical properties and oxygen bulk/surface kinetics of Ln cation effects,whereas the hydration properties for PCFC systems remain unidentified. Here, we thoroughly examined the proton uptake behavior and thermodynamic parameters for the hydration reaction to conclusively determine the changes in the electrochemical performances depending on LnBa_(0.5)Sr_(0.5)Co_(1.5)Fe_(0.5)O_(5+δ)(LnBSCF,Ln=Pr, Nd, and Gd) cathodes. At 500 ℃, the quantitative proton concentration of PrBSCF was 2.04 mol% and progressively decreased as the Ln cation size decreased. Similarly, the Gibbs free energy indicated that less energy was required for the formation of protonic defects in the order of Pr BSCF hodes, PCFC single cell measurements and analysis of the distribution of relaxation time were further investigated.

关键词： Protonic ceramic fuel cell Cathode Triple ionic and electronic conductor Hydration property Proton uptake Gibbs free energy

Long-term clinical outcomes of drug-eluting stents ***-metal stents in Chinese geriatric patients

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2013年第4期10卷 330-335页

作者： Pak-Hei Chan Sha-Sha Liu Hung-Fat Tse Wing-Hing Chow Man-hong Jim hee-hwa ho Chung Wah Siu Department of Medicine Li Ka Shing Faculty of Medicine The University of Hong Kong 102 Pokfulam Rd Hong Kong China Cardiac Medical Unit Grantham Hospital 125 Wong Chuk Hang Rd Aberdeen Hong Kong China

BACKGROUND & OBJECTIVE: Little is known about the relative efficacies of percutaneous coronary intervention (PCI) with drug-eluting stents (DES) and bare-metal stents (BMS) in elderly patients。 The objective of this study was to evaluate the clinical outcome for geriatric patients who received either DES or BMS。 METhoDS: From January 2002 to October 2005, 199 consecutive Chinese geriatric patients (≥ 75 years old) underwent PCI with coronary DES or BMS implantation at our institution。 We analyzed the major clinical end points that included all-cause mortality, cardiovascular death, myocardial infarction, target lesion revascularization (TLR), stent thrombosis, and bleeding complications。 RESULTS: The three-year cumulative rates of all-cause mortality, cardiovascular death, and myocardial infarction were significantly lower in the DES group (6.3%,3.6%,5.4%) compared with the BMS group (16.2%,11.5%,14.9%; P hout increased risk of TLR, stent thrombosis, or bleeding complications at three years in this group of Chinese geriatric patients。

关键词： Bare-metal stents Drug-eluting stents Geriatric patients Percutaneous coronary intervention

Shockwave intravascular lithotripsy and drug-coated balloon angioplasty in calcified coronary arteries:preliminary experience in two cases

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2021年第8期18卷 689-691页

作者： hee hwa ho Jin Hyun Lee Deanna Zhi Lin Khoo Ko Ko Soe Hpone Ki Fung Cliff Li Department of Cardiology Tan Tock Seng Hospital

Heavily calcified coronary arteries are extremely difficult to treat as calcium deposits "hardens" the arteries and alter vascular compliance. Intravascular lithotripsy (IVL)is a new technology consisting of a balloon-based system with miniaturized lithotripsy emitters that create a localised field effect to crack calcium in the arterial wall. Drug-coated balloon (DCB) angioplasty is an alternative treatment option in percutaneous coronary intervention (PCI) with an attractive strategy of leaving nothing behind combined with local drug delivery. In this brief clinical report, we described our early experience of using a novel combination of IVL and DCB angioplasty in two elderly patients with good angiographic results.

关键词：

Ionizing terahertz waves with 260 MV/cm from scalable optical rectification

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第6期13卷 1075-1087页

作者： Hyeongmun Kim Chul Kang Dogeun Jang Yulan Roh Sang hwa Lee Joong Wook Lee Jae hee Sung Seong Ku Lee Ki-Yong Kim Advanced Photonics Research Institute GISTGwangju61005Korea Department of Physics and Optoelectronics Convergence Research Center Chonnam National UniversityGwangju61186Korea Pohang Accelerator Laboratory POSTECHPohang37673Korea Center for Relativistic Laser Science Institute for Basic ScienceGwangju61005Korea Institute for Research in Electronics and Applied Physics Department of PhysicsUniversity of MarylandCollege ParkMaryland20742USA

Terahertz(THz)waves,known as non-ionizing radiation owing to their low photon energies,can actually ionize atoms and molecules when a sufficiently large number of THz photons are concentrated in time and ***,we demonstrate the generation of ionizing,multicycle,15-THz waves emitted from large-area lithium niobate crystals via phase-matched optical rectification of 150-terawatt laser pulses.A complete characterization of the generated THz waves in energy,pulse duration,and focal spot size shows that the field strength can reach up to 260 megavolts per *** particular,a single-shot THz interferometer is employed to measure the THz pulse duration and spectrum with complementary numerical *** intense THz pulses are irradiated onto various solid targets to demonstrate THz-induced tunneling ionization and plasma *** study also discusses the potential of nonperturbative THz-driven ionization in gases,which will open up new opportunities,including nonlinear and relativistic THz physics in plasma.

关键词： optical interferometer matched

Clinical outcomes of elderly South-East Asian patients in primary percutaneous coronary intervention for ST- elevation myocardial infarction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2016年第10期13卷 830-835页

作者： Jieli Tong Wen Wei Xiang An Shing Ang Wen Jun Sim Kien hong Quah David Foo Paul Jau Lueng Ong hee hwa ho Department of Cardiology Tan Tock Seng Hospital Singapore Clinical Research & Innovation Office Tan Tock Seng Hospital Singapore

评估临床的特征和经历主要经皮的冠的干预(PPCI ) 的老东南亚洲病人的在里面医院结果 .MethodsFrom 2009 年 1 月到 2012 年 12 月， 1268 个病人(86.4% 男性， 58.4 楴的吝啬的年龄？

关键词：冠状动脉临床效果心肌梗死介入治疗东南亚患者 ST 平均年龄