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Enhanced activity and durability of FeCoCrMoCBY nanoglass in acidic hydrogen evolution reaction

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Journal of Materials Science & Technology 2024年第3期170卷 212-220页

作者： Mengyang Yan Shuangqin Chen Shangshu Wu Xuechun Zhou Shu Fu Di Wang Christian Kübel horst Hahn Si Lan Tao Feng Herbert Gleiter Institute of Nanoscience School of Material Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Institute of Nanotechnology Karlsruhe Institute of TechnologyKarlsruhe 76021Germany

In the present work,a multi-element nanoglass(m-NG)of FeCoCrMoCBY is obtained first time by the laser ablation combined with inert gas condensation(laser-IGC)*** with the conventional rapid-quenched metallic glass(MG)with identical composition,the Fe-based m-NG demonstrates a superior performance as a self-supported electrocatalyst for hydrogen evolution reaction(HER)in acidic *** enhanced HER activity of m-NG is proposed to be closely related to its high en-ergy states,which is originated from the unique inhomogeneous nanostructures with a high density of low-coordinated ***,the Fe-based m-NG exhibits an outstanding comprehensive catalytic performance even beyond the commercial Pt/C catalyst in long-term test due to its self-optimization *** work not only opens the way to the preparation of m-NGs by the novel laser-IGC technique,but also makes a great contribution to developing low-cost,high-efficient,and super-durable HER electrocat-alysts in acidic environment.

关键词： Nanoglass Inert gas condensations High energy states Hydrogen evolution reactions

Function of lateral line canal morphology

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Integrative Zoology 2015年第1期10卷 111-121页

作者： Adrian KLEIN horst BLECKMANN Institute for Zoology University of BonnPoppelsdorfer SchlossBonnGermany

Fish perceive water motions and pressure gradients with their lateral *** line information is used for prey detection,spatial orientation,predator avoidance,schooling behavior,intraspecific communication and station *** lateral line of most fishes consists of superficial neuromasts(SNs)and canal neuromasts(CNs).The distribution of SNs and CNs shows a high degree of variation among *** have speculated for decades about the functional significance of this diversity,often without any conclusive *** et al.(2013)examined how tubules,pore number and pore patterns affect the filter properties of lateral line canals in a marine teleost,the black prickleback(Xiphister atropurpureus).A preliminary mathematical model was formulated and biomimetic sensors were *** the present study the mathematical model was extended to understand the major underlying principle of how canal dimensions influence the filter properties of the lateral *** the extended mathematical model and the sensor experiments show that the number and distribution of pores determine the spatial filter properties of the lateral *** an environment with little hydrodynamic noise,simple and complex lateral line canals have comparable response ***,if exposed to highly turbulent conditions,canals with numerous widely spaced pores increase the signal to noise ratio significantly.

关键词： filter lateral line morphology noise sensor

Lateral line system of fish

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Integrative Zoology 2009年第1期4卷 13-25页

作者： horst BLECKMANN Randy ZELICK Institute of Zoology University of BonnBonnGermany Department of Biology Portland State UniversityPortlandUSA

The lateral line is a sensory system that allows fishes to detect weak water motions and pressure *** smallest functional unit of the lateral line is the neuromast,a sensory structure that consists of a hair cell epithelium and a cupula that connects the ciliary bundles of the hair cells with the water surrounding the *** lateral line of most fishes consists of hundreds of superficial neuromasts spread over the head,trunk and tail *** addition,many fish have neuromasts embedded in lateral line canals that open to the environment through a series of *** present paper reviews some more recent aspects of the morphology,behavioral relevance and physiology of the fish lateral *** addition,it reports some new findings with regard to the coding of bulk water flow.

关键词： central integration hydrodynamic reception lateral line object localization teleost fish.

Focal Points at Infinity for Short-Range Scattering Trajectories

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Journal of Shanghai Jiaotong university(Science) 2018年第1期23卷 146-157页

作者： HOHBERGER horst KLEIN Markus University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Institute for Mathematics University of Potsdam

Classical scattering trajectories are known to form a Lagrangian manifold in euclidean phase space,which allows the classification of local focal points for sufficiently small dimensions. For the case of a short-range potential, we show that the natural description of focal points at infinity is a Lagrangian manifold in the cotangent bundle of the sphere and establish the relationship between focal points at infinity and the projection singularities of that manifold.

关键词： Lagrangian manifold classical scattering theory short-range potential

Generation of the Stigmatic Beam with Orbital Angular Momentum

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Chinese Physics Letters 2001年第6期18卷 771-773页

作者： GAO Chun-Qing WEI Guang-Hui horst WEBER Optical Engineering Department Beijing Institute of TechnologyBeijing 100081 Optical Institute Technical University BerlinStrasse des 17 Juni 135D-10623 BerlinGermany

The stigmatic beam with orbital angular momentum is generated by transforming the Hermite-Gaussian beam of a diode-pumped Nd:YAG laser through a rotated cylindrical optical *** the transformation optics the output beam has an intensity distribution of ring shape and a twist *** beam transformation is theoretically calculated and the result has been confirmed in the experiments.

关键词： Nd:YAG pumped beam

Nanosized magnetite in low cost materials for remediation of water polluted with toxic metals, azo- and antraquinonic dyes

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Frontiers of Environmental Science & Engineering 2015年第5期9卷 746-769页

作者： Maria Fernanda horst Veronica LASSALLE Maria Lujan FERREIRA Institute of Chemistry of the South (Inquisur Universidad Nacional del Sur~ONICET) Avda Alem 1253 Bahia Blanca Argentina Pilot Plant of Chemical Engineering (PLAPIQUI-UNS-CONICET) Universidad Nacional del Sur--CONICET Camino La Carrindanga km7 Bahia Blanca Argentina

Nanosized magnetite has emerged as an adsorbent of pollutants in water remediation. Nanoadsor- bents include magnetic iron oxide and its modifiers/ stabilizers, such as carbon, silica, clay, organic moieties （polymers, aminoaeids, and fatty acids） and other inorganic oxides. This review is focused on the recent developments on the synthesis and use of magnetic nanoparticles and nanocomposites in the treatment of contaminated water. The emphasis is on the influence of the iron oxide modifiers on some properties of interest such as size, BET area, and magnetization. The characteristics of these nanomaterials are related to their ability to eliminate heavy metal ions and dyes from wastewater. Comparative analysis of the actual literature was performed aiming to present the magnetic material, its preparation methodology and performance in the elimination of the selected pollutants. Vast information has been properly summarized according to the materials, their properties and preferential affinity for selected contaminants. The mechanisms governing nanomaterial＇s formation as well as the interactions with heavy metals and dyes have been carefully analyzed and associated to their efficiency.

关键词： nanomagnetite water remediation toxicmetals dyes supported magnetite

Prediction of the Resonance Characteristics of Combustion Chambers on the Basis of Large-Eddy Simulation

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Journal of Thermal Science 2005年第2期14卷 156-161页

作者： Franco MAGAGNATO Balázs PRITZ horst BCHNER Martin GABI Department of Fluid Machinery University of Karlsruhe GermanyDepartment of Fluid Machinery University of KarlsruheGermanyEngler-Bunte-Institute/Division for Combustion Technology University of KarlsruheGermanyDepartment of Fluid Machinery University of KarlsruheGermany

In the last few years intensive experimental investigations were performed at the University of Karlsruhe to develop an analytical model for the Helmholtz resonator-type combustion system. In the present work the resonance characteristics of a Helmholtz resonator-type combustion chamber were investigated using large-eddy simulations (LES), to understand better the flow effects in the chamber and to localize the dissipation. In this paper the results of the LES are presented, which show good agreement with the experiments. The comparison of the LES study with the experiments sheds light on the significant role of the wall roughness in the exhaust gas pipe.

关键词： compressible large-eddy simulation combustion instabilities oscillating flow damping ratio.

Different characteristics of chronic dibutyltin dichloride-induced pancreatitis and cholangitis in mouse and rat

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Hepatobiliary & Pancreatic Diseases International 2020年第2期19卷 169-174页

作者： Friederike Lütt Luise Ehlers horst Nizze Robert Jaster Department of Medicine II Division of GastroenterologyRostock University Medical CenterE.-Heydemann-Str.618057 RostockGermany Institute of Pathology Rostock University Medical CenterStrempelstraβ1418057 RostockGermany

Background:Current animal models of chronic pancreatitis(CP)often provide only limited pathophysio-logical insights since they incompletely reflect the human *** induced by injection of dibutyltin dichloride(DBTC-pancreatitis)shares with human CP the important feature of extended fibrosis and would be an even more attractive model if it could be transferred from rats to mice,as recently sug-gested in the context of combined ethanol and DBTC *** study aimed to evaluate the effects of DBTC in pancreas and liver of C57BL/6 mice,a strain commonly used to engineer genetic mouse ***:C57BL/6 mice and Lewis rats were exposed to variable doses of *** an investigation period of up to 4 weeks,laboratory findings and histopathological changes of pancreas and liver were ***:Chronic DBTC-pancreatitis in rats was characterized by acinar cell damage,ductal changes,fi-brosis,and inflammatory cell *** treated with DBTC at 6–8 mg/kg body weight,the standard doses in rats,showed transient increases of lipase activities but no morphological signs of chronic DBTC-pancreatitis 4 weeks after injection of the *** doses of 10–12 mg/kg DBTC were intolerable due to their high *** contrast,mice and rats presented with a similar histopathology of the liver that can be characterized as a chronic-proliferative DBTC-cholangitis with predominating damage and proliferation of the small bile ducts as well as secondary portal inflammatory cell infiltrates and a begin-ning portal ***:The DBTC-model cannot be transferred from rats to C57BL/6 mice with respect to chronic DBTC-pancreatitis,but might be of interest to study DBTC-cholangitis in both species.

关键词： Animal models Cholangitis Pancreatitis

Nuclear Dynamics at the Particle Threshold

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原子核物理评论 2015年第2期32卷 129-136页

作者： Nadia Tsoneva horst Lenske Institut fur Theoretische Physik Universitat Gieβen

Recently, new low-energy modes of excitation called pygmy resonances have been *** distinct feature is the close connection to nuclear skin oscillations. A successful description of the pygmy resonances could be achieved in a microscopic theoretical approach which incorporates the density functional theory and QRPA formalism extended with multi-phonon degrees of freedom. The latter is found of crucial importance for the understanding of the fine structure of nuclear electric and magnetic excitations at low energies. Corresponding microscopic multi-phonon response functions are implemented in the studies of s-process of nucleosynthesis.

关键词： microscopic nuclear model density functional theory extended quasiparticle-random-phase-approximation nucleon-capture reactions stellar nucleosynthesis