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^(120)Ba的β衰变

高能物理与核物理 1991年第2期15卷 170-177页

作者：徐树威袁双贵郭俊盛刘满清 E.Hagberg V.T.Koslowsky G.Dyck j.c.hardy H.Schmeing 中国科学院近代物理研究所兰州730000 Atomic Energy of canada Limited Chalk River Nuclear Laboratories Atomic Energy of canada Limited Chalk River Nuclear Laboratories

用68 MeV的^(16)O束轰击2 mg/cm^2的^(106)cd靶产生^(120)Ba再把它氟化,送入氦喷嘴离子源。在线质量分离的^(120)Ba的衰变性质被γ-γ,γ-γ和γ-β符合测量。其半衰期为24±2S,总衰变能Q_(Ec)=5.0±0.3MeV,并获得了简单的^(120)Ba的衰... 详细信息

用68 MeV的^(16)O束轰击2 mg/cm^2的^(106)cd靶产生^(120)Ba再把它氟化,送入氦喷嘴离子源。在线质量分离的^(120)Ba的衰变性质被γ-γ,γ-γ和γ-β符合测量。其半衰期为24±2S,总衰变能Q_(Ec)=5.0±0.3MeV,并获得了简单的^(120)Ba的衰变纲图。

关键词： ^120Ba 衰变 β射线

Status and prospects for symmetric organic redox flow batteries

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journal of Energy chemistry 2025年第1期100卷 125-143页

作者： Md Al Raihan c.Adam Dyker Department of chemistry University of New Brunswick

As environmental concerns from fossil fuel consumption intensify, large-scale energy storage becomes imperative for the integration of renewable sources like wind, hydro, and solar with the electrical *** flow batteries, particularly those employing organic molecules, are positioned as a key technology for this purpose. This review explores the growing field of symmetric organic redox flow batteries(ORFBs) within this context. Unlike traditional asymmetric designs based on unique active materials for each electrode, symmetric ORFBs involve a single bipolar species for both electrodes. This review highlights the benefits of a symmetric design, and categorizes five distinct classes of organic bipolar molecules used in both aqueous and non-aqueous solvents. By providing a comprehensive overview of their cell cycling and performance characteristics, the strengths and weaknesses of the diverse categories of bipolar molecules are highlighted for both solvent systems, as are opportunities for future development. This should guide new research directions and advance the development of practical symmetric ORFBs.

关键词： Redox flow battery Symmetric battery Organic battery Aqueous electrolyte Non-aqueous electrolyte

Molecular Dynamics Simulation of MgSiO_(3) Perovskite

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chinese Physics Letters 1998年第6期15卷 444-446页

作者： ZHOU Lin-xiang j.R.hardy XU Xin Department of Physics Xiamen UniversityXiamen 361005 Department of Physics and center for Electro-Optics University of Nebraska-LincolnNE 68588-0111U.S.A State Key Laboratory for Physical chemistry of Solid Surfaces Department of ChemistryXiamen UniversityXiamen 361005

Using molecular dynamics to simulate MgSiO_(3) perovskite is performed to investigate its phase transitions and *** simulations has used parameter-free Gordon-Kim potentials and a novel technique to monitor the motion of ions which clearly demonstrates the sublattice melting of ions O^(2-) and the rotations of SiO_(6) ***_(3) has to undergo a few of phase transitions,then enter into the cubic *** particular,there is a transitional phase between orthorhombic phase and cubic *** are a superionc phase and the cubic phase in magnesium-rich silicate *** superionic phase occurs after the onset of cubic phase before the melting *** onset temperature T_(c) for superionicity is about 200-700K below the melting point T_(m),T_(c)/T_(m)~0.92.

关键词： cubic perovskite transitions

A functional tacrolimus-releasing nerve wrap for enhancing nerve regeneration following surgical nerve repair

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Neural Regeneration Research 2025年第1期20卷 291-304页

作者： Simeon c.Daeschler Katelyn j.W.So Konstantin Feinberg Marina Manoraj jenny cheung jennifer Zhang Kaveh Mirmoeini jPaul Santerre Tessa Gordon Gregory HBorschel SickKids Research Institute Neuroscience and Mental Health ProgramTorontoONCanada Institute of Biomaterials and Biomedical Engineering University of TorontoTorontoONCanada Indiana University School of Medicine IndianapolisINUSA Division of Plastic and Reconstructive Surgery the Hospital for Sick ChildrenTorontoONCanada Translational Biology and Engineering Program Ted Rogers Centre for Heart ResearchInstitute of Biomedical EngineeringFaculty of DentistryUniversity of TorontoTorontoONCanada

Axonal regeneration following surgical nerve repair is slow and often incomplete,resulting in poor functional recovery which sometimes contributes to lifelong ***,there are no FDA-approved therapies available to promote nerve *** accelerates axonal regeneration,but systemic side effects presently outweigh its potential benefits for peripheral nerve *** authors describe herein a biodegradable polyurethane-based drug delivery system for the sustained local release of tacrolimus at the nerve repair site,with suitable properties for scalable production and clinical application,aiming to promote nerve regeneration and functional recovery with minimal systemic drug *** is encapsulated into co-axially electrospun polycarbonate-urethane nanofibers to generate an implantable nerve wrap that releases therapeutic doses of bioactive tacrolimus over 31 *** and drug loading are adjustable for applications in small and large caliber nerves,and the wrap degrades within 120 days into biocompatible *** released from the nerve wrap promotes axon elongation in vitro and accelerates nerve regeneration and functional recovery in preclinical nerve repair models while off-target systemic drug exposure is reduced by 80%compared with systemic *** its surgical suitability and preclinical efficacy and safety,this system may provide a readily translatable approach to support axonal regeneration and recovery in patients undergoing nerve surgery.

关键词： biodegradable local drug delivery nerve injury nerve regeneration nerve wrap tacrolimus

Molecular Dynamics Simulation of Binary Fluorozirconate Glass ZrF_(4)·BaF_(2)

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chinese Physics Letters 1998年第5期15卷 326-328页

Binary fluorozirconate glassZrF_(4)·BaF_(2) has been studied by molecular dynamical simulation using parameter-free Gordon-Kim *** these simulations a novel technique is employed to monitor the motion of ions,thus the structure pictures of glass and the microscopic motion mechanism of ionic conduction are clearly and directly *** glass networks commonly are formed by ZrF8,ZrF7 or ZrF6 polyhedra,cross linked by Ba-F ionic *** mean distance of the ionic nearest neighboring at 300K is about 3.90Å(Zr-Zr),3.87Å(Zr-Ba),and 1.96Å(Zr-F).The two stronger peaks of five main peaks of vibrational spectra are at about 540-600 and 460-510cm^(-1) and three weaker peaks at about 386-416,322-348,and 183-196cm^(-1).The other properties of glass:density,thermal expansion coefficient,polarization,and glass transition temperature are also examined.

关键词： zirconate glass Molecular

combined Effects of Nb and B MicroAlloying in Molybdenum Based Ultra Low carbon Bainitic (ULcB) Steels

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journal of Iron and Steel Research International 2011年第S1期18卷 785-791页

作者： hardy Mohrbacher Niobelcon bvba 2970 SchildeBelgium

ULcB steels have a great potential for structural as well as automotive applications due to the lean alloying concept and the favorable combination of strength and *** steels are being considered as the material of choice for many advanced applications where yield strength above 500 MPa is required to reduce component *** Mo has been a key alloying element in producing such *** order to push the property envelope of ULcB steels it is interesting to combine Mo alloying with the microalloying elements Nb and *** effects between these elements bear synergies that cannot be achieved by single *** paper demonstrates how these synergies can be beneficially used in combination with appropriate processing.

关键词： grain refinement bainitic transformation precipitation hardening accelerated cooling tempering

A Strategy of Avoiding Delayed Fracture in Ultrahigh Strength Automotive Steels by Nb Microalloying

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journal of Iron and Steel Research International 2011年第S1期18卷 893-897页

作者： hardy Mohrbacher Niobelcon bvba 2970 SchildeBelgium

Recently the automotive industry has been confronted with the phenomenon of delayed *** phenomenon was not relevant in earlier years since the strength level of the steels was generally below a critical ***,delayed fracture is not necessarily related to an absolute strength value but rather to microstructural features as well as pre-existing micro-damage in the material that are likely to occur in ultrahigh strength *** microalloying in combination with appropriate processing can effectively help to improve the resistance against delayed fracturing in such *** paper outlines a strategy how to achieve this based on microstructural control and hydrogen trapping.

关键词： delayed fracture niobium microalloying grain refinement hydrogen trapping molybdenum alloying

Inflammasome links traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease

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Neural Regeneration Research 2025年第6期20卷 1644-1664页

作者： Gabriela Seplovich Yazan Bouchi juan Pablo de Rivero Vaccari jennifer c.Munoz Pareja Andrew Reisner Laura Blackwell Yehia Mechref Kevin K.Wang j.Adrian Tyndall Binu Tharakan Firas Kobeissy Department of Surgery Morehouse School of MedicineAtlantaGAUSA Department of Neurobiology Center for NeurotraumaMultiomics&Biomarkers(CNMB)Neuroscience InstituteMorehouse School of MedicineAtlantaGAUSA Department of Neurological Surgery and the Miami Project to cure Paralysis University of Miami Miller School of MedicineMiamiFLUSA Division of Pediatric critical care Department of PediatricsUniversity of Miami Miller School of MedicineMiamiFLUSA Department of Pediatrics Emory UniversityAtlantaGAUSA Department of Neurosurgery Children’s Healthcare of AtlantaAtlantaGAUSA Department of chemistry and Biochemistry Texas Tech UniversityLubbockTXUSA Morehouse School of Medicine AtlantaGAUSA

Traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease are three distinct neurological disorders that share common pathophysiological mechanisms involving neuroinflammation. One sequela of neuroinflammation includes the pathologic hyperphosphorylation of tau protein, an endogenous microtubule-associated protein that protects the integrity of neuronal cytoskeletons. Tau hyperphosphorylation results in protein misfolding and subsequent accumulation of tau tangles forming neurotoxic aggregates. These misfolded proteins are characteristic of traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease and can lead to downstream neuroinflammatory processes, including assembly and activation of the inflammasome complex. Inflammasomes refer to a family of multimeric protein units that, upon activation, release a cascade of signaling molecules resulting in caspase-induced cell death and inflammation mediated by the release of interleukin-1β cytokine. One specific inflammasome, the NOD-like receptor protein 3, has been proposed to be a key regulator of tau phosphorylation where it has been shown that prolonged NOD-like receptor protein 3 activation acts as a causal factor in pathological tau accumulation and spreading. This review begins by describing the epidemiology and pathophysiology of traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease. Next, we highlight neuroinflammation as an overriding theme and discuss the role of the NOD-like receptor protein 3 inflammasome in the formation of tau deposits and how such tauopathic entities spread throughout the brain. We then propose a novel framework linking traumatic brain injury, chronic traumatic encephalopathy, and Alzheimer's disease as inflammasomedependent pathologies that exist along a temporal continuum. Finally, we discuss potential therapeutic targets that may intercept this pathway and ultimately minimize long-term neurological decline.

关键词： Alzheimer's disease caspase-1 chronic traumatic encephalopathy inflammasomes neurodegeneration neuroinflammation NLRP1 NLRP3 pyroptosis tauopathy traumatic brain injury

Transaction costs for collaboration in the watershed management of the cuyahoga River Area of concern

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Regional Sustainability 2022年第2期3卷 146-156页

作者： Scott Daniel hardy Ohio Sea Grant The Ohio State UniversityColumbus43212USA

This study examines the transaction costs of collaborative watershed management in the cuyahoga River Area of concern(AOc)—one of the 43 geographic areas designated by the *** canada Great Lakes Water Quality Agreement(GLWQA),where significant impairment of beneficial uses has occurred as a result of human *** cuyahoga River is located in Northeast Ohio,the *** flows through the city of cleveland before draining into Lake Erie—one of the five Great Lakes of North *** watershed is degraded due to municipal and agricultural discharges,streambank erosion,and contamination from urban and industrial *** research explores how a diverse group of stakeholders convened under the cuyahoga River AOc Advisory committee to share information,coordinate activities,agree on activities that restore beneficial uses,and support strategic management *** this study,23 semi-structured interviews with members of the advisory committee were conducted between january 28,2020 and April 20,2020,with follow-up emails and phone calls as needed to corroborate information.A review of research articles and government documents supported the interviews,including United States Environmental Protection Agency(***)and Ohio Environment Production Agency(OEPA)reports on the GLWQA and cuyahoga River Remedial Action Plans.A third source of data is from direct participant observation at quarterly meetings of the advisory committee during 2017–2020,binational AOc conferences in 2017 and 2019,and other professional events geared towards restoring the cuyahoga River AOc in 2016–*** of this study include a set of recommendations to help guide group structure and decision-making processes,including(1)employing best available technology to organize AOc events and disseminate information;(2)supporting new members with an orientation and/or mentor to clearly define formal and informal committee rules;(3)assuring equal access to detailed information on managem

关键词： Environmental policy Watershed management Transaction costs collaboration Sustainability Great Lakes