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Effect of a High Magnetic Field on the shape of the γ' Precipitates in Cast Nickel-based superalloy K52

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journal of Materials science & Technology 2009年第3期25卷 379-382页

作者： X. Ren G.Q. Chen W.L. Zhou C.W. Wu C. Yuan j.s. Zhang state Key Laboratory of Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian 116085 China state Key Laboratory of structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116085 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The shape change of the γ＇ precipitates of cast Ni-based superalloy K52 after aging treatment under a high magnetic field was investigated. The results show that duplex γ＇ precipitates are present in the γ matrix after aging treatment with or without the magnetic field. One is the coarse particles with average size of 500 nm; the other is fine spherical γ＇ precipitates with average of 100 nm in diameter. The application of a 10T magnetic field only results in the shape of the coarse γ＇ particles changing from spherical to cuboidal when the alloys subjected to the same heat treatments. This shape change was mainly discussed based on the strain energy increase caused by the difference in magnetostriction between the γ matrix and γ＇ precipitates. The fine γ＇ particles still keep spherical. Further TEM observations shows that a number of γ particles in nano-scale precipitate in the coarse γ＇ particles in the specimens treated without the magnetic field. In addition, it was found that the magnetic field caused the decrease of the hardness in the alloy, and the hardness was associated with the field direction.

关键词： Ni-based superalloy High magnetic field Magnetostrictive strain energy Precipitation

Pyogenic liver abscess caused by Fusobacterium in a 21-year-old immunocompetent male

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World journal of Gastroenterology 2015年第12期21卷 3731-3735页

作者： Zohair Ahmed saurabh K Bansal sonu dhillon Department of Internal Medicine University of Illinois Peoria Campus OSF Saint Francis Medical Center Department of Gastroenterology and Hepatology University of Illinois Peoria Campus OSF Saint Francis Medical Center

A 21-year-old male with no significant past medical history, presented with right upper quadrant(RUQ) abdominal pain along with fevers and chills. Lab work revealed leukocytosis, anemia, and slightly elevated alkaline phosphatase. Viral serology for hepatitis B virus, hepatitis C virus, and human immunodeficiency virus were negative and he was *** tomography imaging revealed hepatic abscesses, the largest measuring 9.5 cm. Empiric antibiotics were started and percutaneous drains were placed in the abscesses. Anaerobic cultures from the abscesses grew Fusobacterium nucleatum. This is a gram negative anaerobic bacteria; a normal flora of the oral cavity. Fusobacterium is most commonly seen in Lemiere's disease, which is translocation of oral bacteria to the internal jugular vein causing a thrombophlebitis and subsequent spread of abscesses. Our patient did not have Lemiere's, and is the first case described of fusobacterium pyogenic liver abscess in a young immunocompetent male with good oral hygiene. This case was complicated by sepsis, empyema, and subsequent abscesses located outside the liver. These abscesses' have the propensity to flare abruptly and can be fatal. This case not only illustrates fusobacterium as a rare entity for pyogenic liver abscess, but also the need for urgent diagnosis and treatment. It is incumbent on physicians to diagnose and drain any suspicious hepatic lesions. While uncommon, such infections may develop without any overt source and can progress rapidly. Prompt drainage with antibiotic therapy remains the cornerstone of therapy.

关键词： Hepatic abscess Pyogenic Fusobacterium Liver Immun

Assessment of predatory ability of native and non-native freshwater gammaridean species： A rapid test with water fleas as prey

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Current Zoology 2011年第6期57卷 836-843页

作者： B.E.M.W. sTOFFELs j.s. TUMMERs G. VAN DER VELDE D. PLATVOET H.W.M. HENDRIKs R.s.E.W. LEUVEN Radboud University Nijmegen Institute for Water and Wetland Research Department of Animal Ecology and Ecophysiology Heyendaalseweg 135 NL-6525 AJ Nijmegen The Netherlands Netherlands Centre for Biodiversity Naturalis P.O. Box 9517 NL-2300 RA Leiden The Netherlands Netherlands Centre for Biodiversity Naturalis Mauritskade 57 NL-1092 AD Amsterdam The Netherlands Radboud University Nijmegen Faculty of Science Department of Mathematics Heyendaalseweg 135 NL-6525 AJ Nijmegen The Netherlands Radboud University Nijmegen Institute for Water and Wetland Research Department of Environmental Science Heyendaal seweg 135 NL-6525 AJ Nijrnegen The Netherlands

Predation rate with relation to species, sex and water temperature was tested among four different gammaridean spe- cies： Dikerogammarus villosus, Gammarus roeselii, Gammarus pulex and Gammarus fossarum. Tests were performed in micro- cosms in climate-controlled rooms at five different temperatures. Daphnia magna, a common water flea, served as prey. On ave- rage D. villosus showed the highest consumption rate of Daphnia magna over the entire temperature range, followed in decreas- ing order by G pulex, G roeselii and G fossarum. The predation rate of all species showed a distinct peak at 20~C. Correction of predation rates for body size gave somewhat different results. D. villosus is then still the most predatory of all gammaridean spe- cies tested followed by G. pulex, G. fossarum and G roeselii. The outcome of the Daphnia tests is consistent with results of other studies with different prey. This supports that the Daphnia test is a good and quick indicator of the predatory abilities in gam- maridean species at varying temperatures, and allows the prediction of how changing temperature regimes influence invasion impacts

关键词： Daphnia Temperature Predation rate Amphipods Invasions

Field-resolved high-order sub-cycle nonlinearities in a terahertz semiconductor laser

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Light(science & Applications) 2021年第12期10卷 2531-2540页

作者： j.Riepl j.Raab P.Abajyan H.Nong j.R.Freeman L.H.Li E.H.Linfield A.G.Davies A.Wacker T.Albes C.jirauschek C.Lange s.s.dhillon R.Huber Department of Physics University of RegensburgRegensburgGermany Laboratoire de Physique de l’Ecole Normale supérieure ENSUniversitéPSLCNRSSorbonne UniversitéUniversitéde ParisParisFrance school of Electronic and Electrical Engineering University of LeedsWoodhouse LaneLeedsUK Mathematical Physics and NanoLund Lund UniversityLundSweden Department of Electrical and Computer Engineering Technical University of MunichMunichGermany Department of Physics TU Dortmund UniversityDortmundGermany

The exploitation of ultrafast electron dynamics in quantum cascade lasers(QCLs)holds enormous potential for intense,compact mode-locked terahertz(THz)sources,squeezed THz light,frequency mixers,and comb-based metrology *** the important sub-cycle dynamics have been notoriously difficult to access in operational THz ***,we employ high-field THz pulses to perform the first ultrafast two-dimensional spectroscopy of a free-running THz *** incoherent and coherent nonlinearities up to eight-wave mixing are detected below and above the laser *** data not only reveal extremely short gain recovery times of 2 ps at the laser threshold,they also reflect the nonlinear polarization dynamics of the QCL laser transition for the first time,where we quantify the corresponding dephasing times between 0.9 and 1.5 ps with increasing bias currents.A density-matrix approach reproducing the emergence of all nonlinearities and their ultrafast evolution,simultaneously,allows us to map the coherently induced trajectory of the Bloch *** observed high-order multi-wave mixing nonlinearities benefit from resonant enhancement in the absence of absorption losses and bear potential for a number of future applications,ranging from efficient intracavity frequency conversion,mode proliferation to passive mode locking.

关键词： polarization mixer cycle

Brain-penetrating neurotrophic factor mimetics: HER-096 as a disease-modifying therapy for Parkinson’s disease

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Neural Regeneration Research 2025年第4期20卷 1094-1095页

作者： Natalia Kulesskaya Kira M.Holmström Henri j.Huttunen Herantis Pharma Plc EspooFinland

Neurotrophic factors as a therapeutic approach in neurodegenerative diseases:A major unmet need in the field of central nervous system diseases is disease-modifying *** for decades there have been various symptomatic treatments available to alleviate the symptoms of the disease,disease-modification,*** that stop,significantly delay,or reverse the progression of the disease,has been turned out to a difficult goal to achieve.

关键词： diseases treatment therapeutic

A mild, configurable, flexible CoNi-LDH（v）/Zn battery based on H-vacancy-induced reversible Zn2+ intercalation

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journal of Energy Chemistry 2025年第1期100卷 498-508页

作者： Xinyue Cheng Dingsheng Wu Hao Gao Qingqing Wang Pengfei Lv sam s.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University school of Mechanical Engineering Korea University

Flexible Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flexible aqueous Zn-based batteries based on Co-Ni layered double hydroxide （CoNi-LDH） as the cathode material is hampered by their poor cycling stability and the corrosiveness of alkaline ***,CoNi-LDH nanosheets enriched with H vacancies (CoNi-LDH（v）) were constructed on a flexible carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDH（v）@CC as the cathode exhibited highly reversible conversion reactions and stable operation in 3 M ZnsO4electrolyte （pH=4）.The battery delivered an excellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant H vacancies served as active sites for the reversible intercalation of Zn2+and the extravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an excellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDH（v）@CC//Zn@CC battery was fabricated and was found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flexible battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** proposed engineering strategy contributes to the realization of textiles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery H vacancies Mild aqueous electrolyte Tailorable battery Wearable energy storage device

small extrachromosomal circular DNA in amyotrophic lateral sclerosis matter

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Neural Regeneration Research 2025年第5期20卷 1411-1413页

作者： Marcos j.Arauzo-Bravo Daniela Gerovska Matthias schwab Alexandra Kretz Computational Biology and systems Biomedicine Biodonostia Health Research InstituteSan SebastianSpain Basque Foundation for science IKERBASQUEBilbaoSpainMax Planck Institute for Molecular BiomedicineComputational Biology and Bioinformatics GroupMünsterNorth Rhine-WestphaliaGermany Department of Cell Biology and Histology Faculty of Medicine and NursingUniversity of Basque Country(UPV/EHU)LeioaSpain Department of Neurology Jena University HospitalJenaThuringiaGermany

Comprehensive studies identify motor neuron spectrum disorders including amyotrophic lateral sclerosis(ALs)as globally rising fatal disorders with the highest prevalence in aging populations,influenced by ethnicity and ancestry(GBD 2016 Motor Neuron Disease Colla borators,2018).While~10% of diagnoses involve a family history(fALs),most cases are considered sporadic(sALs).However,population-based studies suggest that even cases without a common index mutation impart heritability(Ryan et al.,2019),indicating a crucial role of rare and as yet unknown genetic denominators.

关键词： amyotrophic sclerosis

Ultrafast response of harmonic modelocked THz lasers

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Light(science & Applications) 2020年第1期9卷 1530-1537页

作者： Feihu Wang Valentino Pistore Michael Riesch Hanond Nong Pierre-Baptiste Vigneron Raffaele Colombelli Olivier Parillaud juliette Mangeney jerome Tignon Christian jirauschek sukhdeep s.dhillon Laboratoire de Physique de l’Ecole Normale superieure ENSUniversite PSLCNRSSorbonne UniversiteUniversite de ParisParisFrance Department of Electrical and Computer Engineering Technical University of MunichArcisstr.2180333 MunichGermany Centre de Nanosciences et de Nanotechnologies CNRSUniv.Paris-SudUniversite Paris-SaclayC2N-Orsay91405 OrsayCedexFrance Ⅲ-ⅤLab 1 avenue Augustin Fresnel91767 PalaiseauFrance

The use of fundamental modelocking to generate short terahertz(THz)pulses and THz frequency combs from semiconductor lasers has become a routine affair,using quantum cascade lasers(QCLs)as a gain ***,unlike classic laser diodes,no demonstrations of harmonic modelocking,active or passive,have been shown in THz QCLs,where multiple pulses per round trip are generated when the laser is modulated at the harmonics of the cavity’s fundamental round-trip ***,using time-resolved THz techniques,we show for the first time harmonic injection and mode-locking in which THz QCLs are modulated at the harmonics of the round-trip *** demonstrate the generation of the harmonic electrical beatnote within a QCL,its injection locking to an active modulation and its direct translation to harmonic pulse generation using the unique ultrafast nature of our ***,we show indications of self-starting harmonic emission,i.e.,without external modulation,where the QCL operates exclusively on a harmonic(up to its 15th harmonic)of the round-trip *** behaviour is supported by time-resolved simulations of induced gain and loss in the system and shows the importance of the electronic,as well as photonic,nature of *** results open up the prospect of passive harmonic modelocking and THz pulse generation,as well as the generation of low-noise microwave generation in the hundreds of GHz region.

关键词： passive harmonic harmonics

一种光纤光栅传感实验仪的可靠性分析(英文)

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仪器仪表学报 2008年第4期29卷 673-678页

作者：朱萍玉 dhillon B.s. 李学军宾光富湖南科技大学机械设备健康维护湖南省重点实验室渥太华大学机械工程系

光纤光栅作为一种传感单元可以测试应变、温度和压力等物理量。近年来,可用于光纤光栅信号解调的技术和仪器相继出现,并在不同的场合得到了很好的应用。但由于制造、安装和操作等原因,这些仪器的可靠性问题也开始引起不同程度的关注。... 详细信息

光纤光栅作为一种传感单元可以测试应变、温度和压力等物理量。近年来,可用于光纤光栅信号解调的技术和仪器相继出现,并在不同的场合得到了很好的应用。但由于制造、安装和操作等原因,这些仪器的可靠性问题也开始引起不同程度的关注。仪器的可靠性分析是其设计过程中不可缺少的重要环节之一。以一种基于匹配解调技术的准分布式光纤光栅解调仪为例,介绍了该仪器的基本组成和原理;采用故障树法从机械和光电器件的可能出现的如光纤光栅脆断、螺钉松动和脱焊等故障和失效形式出发,根据光路配置、电路以及机械结构分析了可能的故障模式,计算了可靠性。结论有利于对这类仪器的故障诊断和维护。

关键词：可靠性分析光纤传感器故障树光纤光栅