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22篇 您的检索式:作者名="Yusuke Yamauchi"
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1Usefulness of serum lipase for early diagnosis of post-endoscopic retrograde cholangiopancreatography pancreatitis显示文摘BACKGROUND Post-endoscopic retrograde cholangiopancreatography(ERCP)pancreatitis(PEP)is new onset acute pancreatitis after ERCP.This complication is sometimes fatal.As such,PEP should be diagnosed early so that therapeutic interventions can be carried out.Serum lipase(s-Lip)is useful for diagnosing acute pancreatitis.However,its usefulness for diagnosing PEP has not been sufficiently investigated.AIM This study aimed to retrospectively examine the usefulness of s-Lip for the early diagnosis of PEP.METHODS We retrospectively examined 4192 patients who underwent ERCP at our two hospitals over the last 5 years.The primary outcomes were a comparison of the areas under the receiver operating characteristic(ROC)curves(AUCs)of s-Lip and serum amylase(s-Amy),s-Lip and s-Amy cutoff values based on the presence or absence of PEP in the early stage after ERCP via ROC curves,and the diagnostic properties[sensitivities,specificities,positive predictive values(PPV),and negative predictive value(NPV)]of these cutoff values for PEP diagnosis.RESULTS Based on the eligibility and exclusion criteria,804 cases were registered.Over the entire course,PEP occurred in 78 patients(9.7%).It occurred in the early stage after ERCP in 40 patients(51.3%)and in the late stage after ERCP in 38 patients(48.7%).The AUCs were 0.908 for s-Lip[95%confidence interval(CI):0.880-0.940,P<0.001]and 0.880 for s-Amy(95%CI:0.846-0.915,P<0.001),indicating both are useful for early diagnosis.By comparing the AUCs,s-Lip was found to be significantly more useful for the early diagnosis of PEP than s-Amy(P=0.023).The optimal cutoff values calculated from the ROC curves were 342 U/L for s-Lip(sensitivity,0.859;specificity,0.867;PPV,0.405;NPV,0.981)and 171 U/L for s-Amy(sensitivity,0.859;specificity,0.763;PPV,0.277;NPV,0.979).CONCLUSION S-Lip was significantly more useful for the early diagnosis of PEP.Measuring s-Lip after ERCP could help diagnose PEP earlier;hence,therapeutic interventions can be provided earlier.Masayoshi Tadehara Kosuke Okuwaki Hiroshi Imaizumi Mitsuhiro Kida Tomohisa Iwai Hiroshi Yamauchi Toru Kaneko Rikiya Hasegawa Eiji Miyata Yusuke Kawaguchi Hironori Masutani Wasaburo Koizumi 2019World Journal of Gastrointestinal Endoscopy2019,11,9:3
2Photo-enhanced rechargeable high-energy-density metal batteries for solar energy conversion and storage显示文摘Solar energy is considered the most promising renewable energy source.Solar cells can harvest and convert solar energy into electrical energy,which needs to be stored as chemical energy,thereby realizing a balanced supply and demand for energy.As energy storage devices for this purpose,newly developed photo-enhanced rechargeable metal batteries,through the internal integration of photovoltaic technology and high-energy-density metal batteries in a single device,can simplify device configuration,lower costs,and reduce external energy loss.This review focuses on recent progress regarding the working principles,device architectures,and performances of various closed-type and open-type photo-enhanced rechargeable devices based on metal batteries,including Li/Zn-ion,Li-S,and Li/Zn-I_(2),and Li/Zn-O_(2)/air,Li-CO_(2),and Na-O_(2) batteries.In addition to provide a fundamental understanding of photo-enhanced rechargeable devices,key challenges and possible strategies are also discussed.Finally,some perspectives are provided for further enhancing the overall performance of the proposed devices.Hairong Xue Hao Gong Yusuke Yamauchi Takayoshi Sasaki Renzhi Ma 2022Nano Research Energy2022,1,1:2
3Blow-Up Results for a Reaction-Diffusion System显示文摘Yamauchi Yusuke 2006Methods and Applications of Analysis2006,13,4:1
4Mesoporous Hierarchical Anatase for Dye-sensitized Solar Cells Achieving Over 10% Conversion Efficiency显示文摘Jianjian Lin Yoon-Uk Heo Andrew Nattestad Yusuke Yamauchi Shi Xue Dou Jung Ho Kim 2014Electrochimica Acta2014,,:1
5Structural study of highly ordered mesoporous silica thin films and replicated Pt nanowires by high-resolution scanning electron microscopy (HRSEM)显示文摘WU Chia-wen YAMAUCHI Yusuke OHSUNA Tetsu 2006J Mater Chem2006,16,:1
6Linkage of Familial Moyamoya Disease (Spontaneous Occlusion of the Circle of Willis) to Chromosome 17q25显示文摘Tohru Yamauchi Mitsuhiro Tada Kiyohiro Houkin Toshihiro Tanaka Yusuke Nakamura Satoshi Kuroda Hiroshi Abe Takuya Inoue Kiyonobu Ikezaki Toshio Matsushima Masashi Fukui 2000Stroke: Journal of the American Heart Association2000,,:1
7Insulin/Foxo Pathway Regulates Expression Levels of Adiponectin Receptors and Adiponectin Sensitivity显示文摘Atsushi Tsuchida Toshimasa Yamauchi Yusuke Ito 2004Journal of Biological Chemistry2004,279,30:1
8Size control and electronic manipulation of Ru catalyst over B,N codoped carbon network for high-performance hydrogen evolution reaction显示文摘Exploring highly efficient Pt-free catalysts for hydrogen evolution reaction(HER)is of great importance for hydrogen(H2)production.Herein,a novel HER electrocatalyst having abundant ultra-small(2–3 nm)Ru electronically confined by a B,N codoped polar carbon surface(Ru/(B-N)-PC)was constructed.The Ru/(B-N)-PC catalyst exhibits a low overpotential of 15 mV at the current density of 10 mA·cm^(−2),a low Tafel slope of 22.6 mV·dec^(−1),superior durability,which outperforms the benchmark Pt/C catalyst.Both experimental characterizations and theory calculations suggest that an electron communication established between B,N co-doped carbon surface and ultra-small Ru nanoparticles with electrons transferred from N atoms to Ru and backtransferred from Ru to B atoms,which exerts a moderate electronic modification of Ru.This,in turn,affords a modest H adsorption energy and a lower H2O dissociation barrier,leading to the high-performance hydrogen evolution reaction.The work provides meaningful insight into the size control and electronic modulation of Ru catalyst for intrinsic HER activity improvement.Shuai Xu Mang Niu Guowei Zhao Shujun Ming Xingyun Li Qilong Zhu Liang-Xin Ding Minjun Kim Asma A.Alothman Mohammed Sheikh Saleh Mushab Yusuke Yamauchi 2023Nano Research2023,16,5:1
9Neuroinflammation in schizophrenia especially focused on the role of microglia显示文摘Akira Monji Takahiro A. Kato Yoshito Mizoguchi Hideki Horikawa Yoshihiro Seki Mina Kasai Yusuke Yamauchi Shigeto Yamada Shigenobu Kanba 2012Progress in Neuropsychopharmacology & Biological Psychiatry2012,,:1
10Low dielectric property of novel mesoporous silica/polymer composites using显示文摘Norihiro Suzuki Shosuke Kiba Yusuke Yamauchi 2011Microporous and Mesoporous Materials2011,138,13:1
11Porphyrin-based framework materials for energy conversion显示文摘With the increasing demand for fuel causing serious environmental pollution,it is urgent to develop new and environmentally friendly energy conversion devices.These energy conversion devices,however,require good,inexpensive materials for electrodes and so on.The multifunctional properties of porphyrins enable framework materials(e.g.,metal-organic frameworks and covalent organic frameworks)to be applied in energy conversion devices due to their simple synthesis,high chemical stability,abundant metallic active sites,adjustable crystalline structure and high specific surface area.Herein,the types of porphyrin structural blocks are briefly reviewed.They can be used as organic ligands or directly assembled with framework materials to generate high-performance electro-/photo-catalysts.These types of catalysts applied in electro-/photo-catalytic water splitting,electro-/photo-catalytic carbon dioxide reduction,and electrocatalytic oxygen reduction are also summarized and introduced.At the end of the article,we present the challenges of porphyrin-based framework materials in the above application and corresponding solutions.We expect porphyrin-based framework materials to flourish energy conversion in the coming years.Jiawei Gu Yi Peng Ting Zhou Jiao Ma Huan Pang Yusuke Yamauchi 2022Nano Research Energy2022,1,1:1
12Metal−Organic Frameworks:A Robust Platform for Creating Nanoarchitectured Carbon Materials显示文摘CONSPECTUS:Nanoporous carbon(NPC)materials with various architectures have attracted considerable attention because of their distinctive properties and great application potential in environmental remediation,energy conversion and storage,advanced sensors,and other applications.Traditional methods for the synthesis of NPCs,for example,the pyrolysis of natural products or polymers,template-assisted synthesis,and using deep-eutectic solvents,always involve toxic precursors and complex procedures,which greatly hinder further applications.Therefore,it is highly desirable to explore simple and feasible ways to prepare NPCs.Furthermore,to improve the performance and extend the application fields of NPCs,efficient strategies should be developed to regulate the components at the atomic level and construct multidimensional architectures.Chaohai Wang Yiyuan Yao Jiansheng Li Yusuke Yamauchi 2022Accounts of Materials Research2022,3,4:1
13Evolution of standing mesochannels on porous anodic alumina substrates with designed conical holes 显示文摘Yamauchi Yusuke Nagaura Tomota Ishikawa Ayako 2008Journal of the American Chemical Society2008,130,10:1
14Superior electrocatalytic activity of mesoporous Au film templated from diblock copolymer micelles显示文摘在极端大的毛孔附近由互连的 Au 系带的一个网络组成的 Mesoporous Au 电影被发现向懒惰反应展出一项有希望的 electrocatalytic 活动。有直到 25 nm 的毛孔尺寸的 Mesoporous Au 电影成功地用一条聚合 micelle 途径被制作。向甲醇氧化的 mesoporous Au 电影的一项优异催化活动被证实,它彻底地被分析并且与另外的 Au 材料的相比。在高催化的活动的内在的调查表明同样准备的 mesoporous Au 电影的优异表演在 Au 表面上与它在有使 \O 结晶得好的方面和几个步 / 纽结地点的 mesopores 附近的唯一的原子结构有关。这些调查结果橱窗为准备能在 electrocatalytic 应用被用作有希望的候选人的高度活跃的基于 Au 的催化剂的一个战略、可行的图案。Cuiling Lil Bo Jiang Hungru Chen Masataka Imura Liwen Sang Victor Malgras Yoshio Bando Tansir Ahamad Saad M. Atshehri Satoshi Tominaka Yusuke Yamauchi 2016Nano Research2016,9,6:1
15Photovoltaic-powered supercapacitors for driving overall water splitting:A dual-modulated 3D architecture显示文摘Due to the growing demand for clean and renewable hydrogen fuel,there has been a surge of interest in electrocatalytic water-splitting devices driven by renewable energy sources.However,the feasibility of self-driven water splitting is limited by inefficient connections between functional modules,lack of highly active and stable electrocatalysts,and intermittent and unpredictable renewable energy supply.Herein,we construct a dualmodulated three-dimensional(3D)NiCo_(2)O_(4)@NiCo_(2)S_(4)(denoted as NCONCS)heterostructure deposited on nickel foam as a multifunctional electrode for electrocatalytic water splitting driven by photovoltaic-powered supercapacitors.Due to a stable 3D architecture configuration,abundant active sites,efficient charge transfer,and tuned interface properties,the NCONCS delivers a high specific capacity and rate performance for supercapacitors.A twoelectrode electrolyzer assembled with the NCONCS as both the anode and the cathode only requires a low cell voltage of 1.47 V to achieve a current density of 10 mA cm^(−2) in alkaline electrolyte,which outperforms the state-of-the-art bifunctional electrocatalysts.Theoretical calculations suggest that the generated heterointerfaces in NCONCS improve the surface binding capability of reaction intermediates while regulating the local electronic structures,which thus accelerates the reaction kinetics of water electrolysis.As a proof of concept,an integrated configuration comprising a two-electrode electrolyzer driven by two series-connected supercapacitors charged by a solar cell delivers a high product yield with superior durability.Zixu Sun Lijuan Sun See Wee Koh Junyu Ge Jipeng Fei Mengqi Yao Wei Hong Shude Liu Yusuke Yamauchi Hong Li 2022Carbon Energy2022,4,6:0
16Spatial-controlled etching of coordination polymers显示文摘Nanoarchitectonics provide versatile opportunities for modifying the properties of coordination polymers(CP) other than molecular engineering.Spatial-controlled etching focuses on the controlled disassembly of the frameworks.The etching method provides an excellent opportunity for tailoring the properties and functions of the CPs.Here,we discuss the mechanism for controlled etching of the CPs and summarized the two main strategies utilized so far.Several examples are illustrated to demonstrate recent developments in this area.Moreover,advantages of the etched CPs are summarized in several important applications,including energy storage,catalysis and nanomedicine.Qi Dang Yucen Li Wei Zhang Yusuf Valentino Kaneti Ming Hu Yusuke Yamauchi 2021Chinese Chemical Letters2021,32,2:0
17Cobalt phthalocyanine-based conjugated polymer as efficient and exclusive electrocatalyst for CO_(2) reduction to ethanol显示文摘Electrocatalytic conversion of carbon dioxide to high value-added chemicals is a promising method for solving the energy crisis and global warming.Electrochemical active metal-containing conjugated polymers have been widely studied for heterogeneous carbon dioxide reduction.In the present contribution,we designed and synthesized a stable cobalt phthalocyanine-based conjugated polymer,named CoPPc-TFPPy-CP,and also explored its electro-catalytic application in carbon dioxide reduction to liquid products in an aqueous solution.In the catalyst,cobalt phthalocyanine acts as building blocks connected with 1,3,6,8-tetrakis(4-formyl phenyl)pyrenes via imine-linkages,leading to mesoporous formation polymers with the pore size centered at 4.1nm.And the central co-balt atoms shifted to a higher oxidation state after condensation.With these chemical and structural natures,the catalyst displayed a remarkable electrocatalytic CO_(2) reduction performance with an ethanol Faradaic efficiency of 43.25%at-1.0V vs RHE.While at the same time,the electrochemical reduction process catalyzed by cobalt phthalocyanine produced only carbon monoxide and hydrogen.To the best of our knowledge,CoPPc-TFPPy-CP is the first example among organic polymers and metal-organic frameworks that produces ethanol from CO_(2) with a remarkable selectivity.Dong Jiang Ran Bu Wei Xia Yichen Hu Mengchen Zhou Enqing Gao Toru Asahi Yusuke Yamauchi Jing Tang 2023Materials Reports(Energy)2023,3,1:0
18Superconducting joints using reacted multifilament MgB_(2)wires:A technology toward cryogen-free MRI magnets显示文摘The development of superconducting joining technology for reacted magnesium diboride(MgB_(2))conductors remains a critical challenge for the advancement of cryogen-free MgB_(2)-based magnets for magnetic resonance imaging(MRI).Herein,the fabrication of superconducting joints using reacted carbon-doped multifilament MgB_(2)wires for MRI magnets is reported.To achieve successful superconducting joints,the powder-in-mold method was employed,which involved tuning the filament protection mechanism,the powder compaction pressure,and the heat treatment condition.The fabricated joints demonstrated clear superconducting-to-normal transitions in self-field,with effective magnetic field screening up to 0.5 T at 20 K.To evaluate the interface between one of the MgB_(2)filaments and the MgB_(2)bulk within the joint,serial sectioning was conducted for the first time in this type of superconducting joint.The serial sectioning revealed space formation at the interface,potentially caused by the volume shrinkage associated with the MgB_(2)formation or the combined effect of the volume shrinkage and the different thermal expansion coefficients of the MgB_(2)bulk,the filament,the mold,and the sealing material.These findings are expected to be pivotal in developing MgB_(2)superconducting joining technology for MRI magnet applications through interface engineering.Dipak Patel Akiyoshi Matsumoto Hiroaki Kumakura Yuka Hara Toru Hara Minoru Maeda Hao Liang Yusuke Yamauchi Seyong Choi Jung Ho Kim Md Shahriar A.Hossain 2024Journal of Magnesium and Alloys2024,12,1:0
19Chiral Electrodeposition by the Rotation in a Vertical Magnetic Field显示文摘The roles of the rotations in the process of chirality appearance in magnetoelectrodeposition were theoretically clarified.Electrodeposition in a vertical magnetic field induces a macroscopic fluid rotation called vertical MHD flow(VMHDF)over the electrode surface.Inside the rotation,minute numerous micro-vortexes called micro-MHD flow(MMHDF)arise from 2D and 3D nucleation,which interact with the mass flux of metallic ion,yielding chiral deposits with the characteristic features called micro-and nano-mystery circles.Generally,numerous vortexes always keep chiral symmetry,forming four types of vortexes,i.e.,with the combination of upward or downward and clockwise or counterclockwise.However,ionic vacancy acting as an atomic scale lubricant is created in electrodeposition,which gives a restriction to the vortexes;the bottom of an upward vortex covered with ionic vacancies becomes a free surface without friction,whereas the bottom of a downward vortex exposed without ionic vacancies remains rigid with friction.The rotation of VMHDF donates a precession to the upward vortexes to rotate in the same direction,which finally yield a chiral deposit.The similar effect to that of VMHDF can be expected for the system rotation(SR),where an electrolytic cell rotates in a vertical magnetic field.In this case,the SR gives the reverse rotation to the upward vortexes,so that a deposit with reverse chirality is obtained.AOGAKI Ryoichi TAKAGI Satoshi MORIMOTO Ryoichi SUGIYAMA Atsushi MOGI Iwao ASANUMA Miki MIURA Makoto OSHIKIRI Yoshinobu YAMAUCHI Yusuke 2012Journal of Iron and Steel Research(International)2012,19,S2:0
20Recent progress in MgB_(2)superconducting joint technology显示文摘Magnesium diboride(MgB_(2))magnets have the potential to be the next-generation liquid-helium-free magnet for magnetic resonance imaging(MRI)application due to their relatively high superconducting transition temperature,high current density and low raw material cost compared with current commercial niobium-titanium(Nb-Ti)magnets.A typical superconducting magnet includes several coils.To produce an ultra-stable magnetic field for imaging in MRI,a superconducting electromagnet operating in a persistent mode is crucial.Superconducting coils of the electromagnet in MRI are short-circuited to operate in the persistent mode by connecting coils with superconducting joints.Per-sistent joints have been demonstrated for in-situ and ex-situ wires of both mono-and multi-filamentary structures,made predominantly by PIT techniques similar to those used in wire production.To realise further engagement of MgB_(2)in MRI applications,enhancing the performance of MgB_(2)superconducting joints is essential.This literature review summarises research and development on MgB_(2)superconducting joining technology.Hao Liang Dipak Patel Mahboobeh Shahbazi Andrzej Morawski Daniel Gajda Matt Rindfleisch Richard Taylor Yusuke Yamauchi Md Shahriar A.Hossain 2023Journal of Magnesium and Alloys2023,11,7:0
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