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Nano Research 2020年第10期13卷 2755-2762页

作者： Cristóbal Quintana Mahbod Morshedi Jun Du Joseph P.L.Morrall jan k.zaręba Marek Samoc Marie P.Cifuentes Mark G.Humphrey I Research School of Chemistry Australian National UnriversityCanberraACT 2601Australia Advanced Materials Engineering and Modelling Group Wroclaw University of Science and TechnologyWroclaw 50370Poland

Oligo(p-phenyleneethynylene)s(OPEs)end-capped with(alkynyl)bis(diphosphine)ruthenium and thiol/thiolate groups stabilize ca.2 nm diameter gold nanoparticles(AuNPs).The morphology,elemental composition and stability of the resultant organometallic OPE/AuNP hybrid materials have been defined using a combination of molecular-and nano-material chacterization *** hybrids display long-term stability in solution(more than a month),good solubility in organic solvents,reversible rutheniumcentered oxidation,and transparency beyond 800 nm,and possess very strong nonlinear absorption activity at the first biological window,and unprecedented two-photon absorption activity in the second biological window(σ2 up to 38,000 GM at 1,050 nm).

关键词： gold nanoparticles inorganic materials metal alkynyl complexes nonlinear optics organometallics

Geochronology and Petrogenesis of Late Carboniferous to Early Permian basalts in the Central Lhasa Subterrane, Southern Tibet: Implications for the Evolution of the Sumdo Paleo-Tethys Ocean

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 955-968页

作者： MA Wang LIU Yingchao YANG Zhusen jan-Marten HUIZENGA LI Zhenqing YUE Longlong ZHAO Sibo School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Institute of Geology Sinoprobe LaboratoryChinese Academy of Geological SciencesBeijing 100037China MLR key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life SciencesNO-1432ÅsNorway Economic Geology Research Centre(EGRU) College of Science and EngineeringJames Cook UniversityTownsvilleQueensland 4811Australia Department of Geology University of JohannesburgAuckland Park 2006South Africa

basalts from the Late Carboniferous to Early Permian are extensively developed in the central Lhasa subterrane, southern Tibet. Studying the petrogenesis of these rocks may have implications for the late Paleozoic arc magmatism along the central Lhasa subterrane uncovering more of the evolution of the Sumdo Paleo-Tethys Ocean and its dynamic mechanism. basalt samples from the Luobadui Formation in the Leqingla area, NW of Linzhou City in the central Lhasa subterrane, southern Tibet exhibit arc-like geochemical signatures in a subduction-zone tectonic setting characterized by high Al_(2)O_(3) and low TiO_(2) contents, fractionated REE patterns with low Nb/La ratios and high LREE concentrations, and negative HFSE anomalies. based on their higher Th/Ce, Nb/Zr, and lower ba/Th, Pb/Nd ratios, slightly negative to positive ε_(Nd)(t) values, and the relatively high Sr-Pb isotopic compositions, these samples were probably derived from partial melting of a depleted mantle source of garnet + spinel lherzolite, metasomatized by subducted sediments around 297 Ma. Modeling of the trace elements indicates that these basalts experienced fractional crystallization of olivine, clinopyroxene and minor plagioclase during magma ascent and eruption. It is proposed that these Late Carboniferous–Early Permian basalts are associated with the northward subduction of the Sumdo Paleo-Tethys Ocean seafloor along the southern margin of the central Lhasa subterrane.

关键词： geochemistry northward subduction Sumdo Paleo-Tethys Ocean Lhasa terrane Tibet

40-meter-long REBCO tapes with critical current over 4,000 A/12 mm at 4.2 k and 13 T by advanced MOCVD

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Superconductivity 2024年第1期9卷 29-34页

作者： Mahesh Paidpilli Chirag Goel Bhabesh Sarangi Siwei Chen Eduard Galstyan jan Jaroszynski Griffin Bradford Dmytro Abraimov Venkat Selvamanickam Department of Mechanical Engineering Advanced Manufacturing InstituteTexas Center for SuperconductivityUniversity of HoustonHoustonTexasUSA AMPeers LLC HoustonTexasUSA National High Magnetic Field Laboratory TallahasseeFloridaUSA

REba_(2)Cu_(3)O_(7−δ)(REBCO,RE=rare earth)tapes doped with 5%and 15%Zr have been scaled up to lengths more than 40 m in a pilot‐scale advanced metal organic chemical vapor deposition(A‐MOCVD)*** precursor compositions used for the long tapes were guided by a study of the influence of(ba+dopant)/Cu content on the critical current density(Jc)of 5 and 15 mol.%Hf‐and Zr‐added tapes at 4.2 k and 13 *** 40‐mlong tapes exhibited a critical current(Ic)over 4,000 A/12 mm at 4.2 k and 13 T as well as over 1,400 A/12 mm at 20 k and 20 *** critical current densities of a 40‐m‐long tape doped with 5%Zr at 4.2 k measured at the National High Magnetic Field Laboratory(NHMFL)were>10 MAcm^(−2)and>5 MAcm^(−2)at 14 T and 30 T,respectively,which are over three times those of commercial REBCO *** infield Jc of 5%Zradded 40‐m‐long tapes was similar to those of previously‐reported high‐performance short samples made with 15%Zr or *** results demonstrate the excellent potential of A‐MOCVD for manufacturing high Ic REBCO tapes for use in ultrahigh‐field magnet applications.

关键词： High‐temperature superconductors MOCVD REBCO Critical current

Ecological role of the giant root-rat(Tachyoryctes macrocephalus)in the Afroalpine ecosystem

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Integrative Zoology 2017年第4期12卷 333-344页

作者： janŠkLÍba Tereza VLASATÁ Matěj LÖVY Ema HROUZkOVÁ Yonas MEHERETU Claudio SILLERO-ZUBIRI RadimŠUMBERA Faculty of Science University of South BohemiaCzech Republic Institute of Entomology Biology Centre CASCzech Republic Department of Biology College of Natural and Cmputational SciencesMekelle UniversityEthiopia Wildlife Conservation Research Unit Zoology DepartmentUniversity of OxfordUK

Rodents with prevailing subterranean activity usually play an important role in the ecosystems of which they are a part due to the combined effect of herbivory and soil *** is the case for the giant root-rat Tachyoryctes macrocephalus endemic to the Afroalpine ecosystem of the bale Mountains,*** studied the impact of root-rats on various ecosystem features within a 3.5-ha study locality dominated by Alchemilla pasture,which represents an optimal habitat for this species,in 2 periods of a *** root-rats altered plant species composition,reducing the dominant forb,Alchemilla abyssinica,while enhancing Salvia merjame and a few other species,and reduced vegetation cover,but not the fresh plant *** burrows were abandoned by root-rats,other rodents took them over and *** increased ***-rat burrowing created small-scale heterogeneity in soil compactness due to the backfilling of some unused burrow *** compacted soil tended to be rich in nutrients,including carbon,nitrogen and phosphorus,which likely affected the plant growth on sites where the vegetation has been reduced as a result of root-rat foraging and burrowing.

关键词： Afroalpine ecosystem engineer fossorial rodent soil disturbance Tachyoryctes macrocephalus

原特提斯洋俯冲起始——来自北祁连早寒武世弧前岩浆作用的新证据

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岩石矿物学杂志 2024年第2期43卷 250-273页

作者：张同悦张建新于胜尧祁钰李传志中国海洋大学海底科学与探测技术教育部重点实验室山东青岛266100 中国地质科学院地质研究所北京100037 崂山国家实验室海洋矿产资源评价与探测技术功能实验室山东青岛266237

形成于弧前背景的岩浆岩可能记录了俯冲起始的重要证据。本文以北祁连走廊南山蛇绿混杂岩带新识别出的富铌辉长岩和斜长花岗岩为研究对象,在野外观察的基础上,结合岩石学、地球化学、同位素地球化学和年代学的综合研究,对原特提斯洋初... 详细信息

形成于弧前背景的岩浆岩可能记录了俯冲起始的重要证据。本文以北祁连走廊南山蛇绿混杂岩带新识别出的富铌辉长岩和斜长花岗岩为研究对象,在野外观察的基础上,结合岩石学、地球化学、同位素地球化学和年代学的综合研究,对原特提斯洋初始俯冲的时间进行约束,并探讨其形成过程及构造意义。锆石U-Pb定年结果显示富铌辉长岩样品锆石加权平均^(206)Pb/^(238)U年龄为512±4 Ma;两个斜长花岗岩样品的锆石加权平均^(206)Pb/^(238)U年龄分别为522±3 Ma和519±1 Ma。全岩地球化学结果显示富铌辉长岩的Nb含量为7.49×10^(-6)~10.80×10^(-6),TiO_(2)含量为1.50%~2.08%,Nb/U值为11.9~13.4,(Nb/La)N>0.5,明显高于岛弧玄武岩,其εNd(t)值介于+4.38~+5.78之间。斜长花岗岩样品k_(2)O含量(0.31%~1.66%)和k_(2)O/Na2O值(0.05~0.43)较低,稀土元素分布模式较为平缓,具有轻微的Eu正或负异常,相对富集ba、Sr、U等大离子亲石元素,亏损Nb、Ta等高场强元素,结合其正的εNd(t)值(+3.35)和高、正的锆石εHf(t)值(主要在6.2~12.9之间),类似于弧前大洋斜长花岗岩。综合这些研究资料和区域地质,我们认为百经寺斜长花岗岩可能形成于俯冲初始阶段高温环境下俯冲洋壳部分熔融,随着俯冲继续,俯冲板片在更深部的部分熔融形成埃达克质熔体,并交代地幔楔形成富铌辉长岩。这些研究资料表明北祁连所代表的原特提斯洋的初始俯冲发生在早寒武世。

关键词：初始俯冲富铌辉长岩斜长花岗岩北祁连原特提斯洋

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细节管理对消毒供应中心工作质量的影响

中国消毒学杂志 2024年第5期41卷 360-363页

作者：黄倩巴宁丁海霞杜亚文河南中医药大学第五临床医学院郑州人民医院河南郑州450053

目的探索细节管理对医院消毒供应中心(CSSD)工作质量的影响。方法选取2022年1—3月某医院医疗物品和器械作为对照组,采用常规质量管理;2022年4—6月的医疗物品及器械作为观察组,实施细节管理。比较2组消毒灭菌物品的护理风险发生率及质... 详细信息

目的探索细节管理对医院消毒供应中心(CSSD)工作质量的影响。方法选取2022年1—3月某医院医疗物品和器械作为对照组,采用常规质量管理;2022年4—6月的医疗物品及器械作为观察组,实施细节管理。比较2组消毒灭菌物品的护理风险发生率及质量,比较2组风险事件发生的风险值、防范意识、安全识别能力及服务意识情况、消毒灭菌物品不合格发生率及满意度评分。结果观察组消毒灭菌物品质量合格率高于对照组,消毒灭菌物品在回收、清洗、消毒、灭菌、包装及发放过程中不合格发生率明显低于对照组(P﹤0.05),物品风险事件的发生率低于对照组(P﹤0.05),护理人员风险防范意识、安全识别能力及服务意识均高于对照组(P﹤0.05),工作人员对物品满意度评分高于对照组(P﹤0.05)。结论细节管理可以提高CSSD消毒物品及器械的合格率及质量,降低风险值,改善护理人员安全意识。

关键词：质量指标消毒供应中心管理实践

Biomimic Vein-Like Transparent Conducting Electrodes with Low Sheet Resistance and Metal Consumption

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Nano-Micro Letters 2020年第2期12卷 47-59页

作者： Guobin Jia Jonathan Plentz Andrea Dellith Christa Schmidt jan Dellith Gabriele Schmidl Gudrun Andr? Leibniz Institute of Photonic Technology (Leibniz IPHT)

In this contribution,inspired by the excellent resource management and material transport function of leaf veins,the electrical transport function of metallized leaf veins is mimicked from the material transport function of the vein *** electroless copper plating on real leaf vein networks with copper thickness of only several hundred nanometre up to several micrometre,certain leaf veins can be converted to transparent conductive electrodes with an ultralow sheet resistance 100 times lower than that of state-of-the-art indium tin oxide thin films,combined with a broadband optical transmission of above 80%in the UV–VIS–IR ***,the resource efficiency of the vein-like electrode is characterized by the small amount of material needed to build up the networks and the low copper consumption during *** particular,the high current density transport capability of the electrode of>6000 A cm^−2 was *** superior properties of the vein-like structures inspire the design of high-performance transparent conductive electrodes without using critical materials and may significantly reduce the Ag consumption down tobatteries,and supercapacitors.

关键词： Biomimic leaf vein network Transparent conducting electrode Sheet resistance Metal consumption

Electrochemical top-down synthesis of C-supported Pt nanoparticles with controllable shape and size:Mechanistic insights and application

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Nano Research 2021年第8期14卷 2762-2769页

作者： batyr Garlyyev Sebastian Watzele Johannes Fichtner jan Michalicka Alexander Schokel Anatoliy Senyshyn Andrea Perego Dingjie Pan Hany A.El-Sayed jan M.Macak Plamen Atanassov Iryna V.Zenyuk Aliaksandr S.bandarenka Physics of Energy Conversion and Storage Technical University of MunichJames Franck Strafle 185748 Garching Germany Central European Institute of Technology Brno University of TechnologyPurkynova 12361200 BrnoCzech Republic Deutsches Elektronen Synchrotron(DESY) Notkestr.8522607HamburgGermany Heinz Maier-Leibnitz-Zentrum(MLZ) Technische Universitat MiinchenLichtenbergstr.185748 Garching Germany Department of Chemical Engineering National Fuel Cell Research Center University of CaliforniaIrvine92697-2580 CaliforniaUSA Department of Material Science and Engineering University of CaliforniaIrvine92697-2580 CaliforniaUSA Chair of Technical Electrochemistry Technical University of MunichLichtenbergstrafie 485748 Garching Germany

In this work,we demonstrate the power of a simple top-down electrochemical erosion approach to obtain Pt nanoparticle with controlled shapes and sizes(in the range from-2 to-10 nm).Carbon supported nanoparticles with narrow size distributions have been synthesized by applying an alternating voltage to macroscopic bulk platinum structures,such as disks or *** using any surfactants,the size and shape of the particles can be changed by adjusting simple parameters such as the applied potential,frequency and electrolyte *** instance,application of a sinusoidal AC voltage with lower frequencies results in cubic nanoparticles;whereas higher frequencies lead to predominantly spherical *** the other hand,the amplitude of the,sinusoidal signal was found to affect the particle size;the lower the amplitude of the applied AC signal,the smaller the resulting particle ***/C catalysts prepared by this approach showed 0.76 A/mg mass activity towards the oxygen reduction reaction which is-2 times higher than the state-of-the-art commercial Pt/C catalyst(0.42 A/mg)from *** addition to this,we discussed the mechanistic insights about the nanoparticle formation pathways.

关键词： electrochemical synthesis platinum nanoparticles oxygen reduction reaction

Petrogenesis of the Late Cretaceous Tholeiitic Volcanism and Oceanic Island Arc Affinity of the Chagai Arc, Western Pakistan

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Acta Geologica Sinica(English Edition) 2017年第4期91卷 1248-1263页

作者： Rehanul Haq SIDDIQUI M. Qasim jan Mohammad Asif kHAN M. Ishaq kAkAR John D. FODEN baluchistan University of Information Technology Engineering and Management Sciences Quetta Pakistan National Centre of Excellence in Geology University of Peshawar Peshawar & COMSTECH Islamabad Pakistan karakoram International University Gilgit Pakistan Centre of Excellence in Mineralogy University of Baluchistan Quetta Pakistan Department of Earth Sciences University of Adelaide SA 5005 Australia

The Late Cretaceous Chagai arc outcrops in western Pakistan, southern Afghanistan and eastern Iran. It is in the Tethyan convergence zone, formed by northward subduction of the Arabian oceanic plate beneath the Afghan block. The oldest unit of the Chagai arc is the Late Cretaceous Sinjrani Volcanic Group. This is composed of porphyritic lava flows and volcaniclastic rocks, and subordinate shale, sandstone, limestone and chert. The flows are fractionated low-k tholeiitic basalts, basaltic- andesites, and andesites. Relative enrichment in their LILE and depletion in HFSE, and negative Nb and Ta and positive k, ba and Sr anomalies point to a subduction-related origin. Compared to MORB, the least fractionated Chagai basalts have low Na2O, Fe2O3^T, CaO, Ti, Zr, Y and ^87Sr/^86Sr. Rather than an Andean setting, these results suggest derivation from a highly depleted mantle in an intraoceanic arc formed by Late Cretaceous convergence in the Ceno-Tethys. The segmented subduction zone formed between Gondwana and a collage of small continental blocks （Iran, Afghan, karakoram, Lhasa and Burma） was accompanied by a chain of oceanic island arcs and suprasubduction ophiolites including Semail, Zagros, Chagai-Raskoh, kandahar, Muslim bagh, Waziristan and kohistan-Ladakh, Nidar, Nagaland and Manipur. These complexes accreted to the southern margin of Eurasia in the Late Cretaceous.

关键词： Chagai arc tholeiitic volcanics Late Cretaceous western Pakistan

Geochemistry and mineralogy of platinum-group elements(PGE)in chromites from CentralnoyeⅠ,Polar Urals,Russia

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Geoscience Frontiers 2011年第1期2卷 81-85页

作者： jan Paava Ilja knésl Anna Vymazalová Ivan Vavrín Ludmila Ivanovna Gurskaya Leonid Ruslanovich kolbantsev Czech Geological Survey Geologicka 6152 00 Praha 5Czech Republic All Russia Geological Research Institute(VSEGEI) 74 Srechy Pr.199 106 St.PetersburgRussia

The Polar Urals region of northern Russia is well known for large chromium （Cr）-bearing massifs with major chromite orebodies, including the Centralnoye I deposit in the Ray-Iz ultramafic massif of the Ural ophiolite belt. New data on platinum （Pt）-group elements （PGE）, geochemistry and mineralogy of the host dunite shows that the deposit has anomalous iridium （Ir） values. These values indicate the predominance of ruthenium--osmium--iridium （Ru--Os--Ir）-bearing phases among the platinum-group mineral （PGM） assemblage that is typical of mantle-hosted chromite ores. Low Pt values in chromites and increased Pt values in host dunites might reflect the presence of cumulus PGM grains. The most abundant PGM found in the chromite is erlichmanite （up to 15 μm）. Less common are cuproiridsite （up to 5 μm）, irarsite （up to 4--5 μm）, and laurite （up to 4 μm）. The predominant sulfide is heazlewoodite, in intergrowth with Ni--Fe alloys, sporadically with pentlandite, and rarely with pure nickel. based on the average PGE values and esti- mated Cr-ore resources, the Centralnoye I deposit can be considered as an important resource of PGE.

关键词： Platinum-group elements Platinum-group minerals Chromite Ophiolites Centralnoye I deposit Polar Urals