检索结果-南通市图书馆

Development and prospects of degradable magnesium alloys for structural and functional applications in the fields of environment and energy

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第11期11卷 3926-3947页

作者： Yuanding Huang Yaping Zhang Jiangfeng Song Fusheng Pan Regine Willumeit-Römer karl Ulrich Kainer Norbert Hort Institute of Metallic Biomaterials Helmholtz-Zentrum hereonMax-Planck-Str.121502 GeesthachtGermany Nano and Heterogeneous Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044PR China Chair of Light Elements Engineering Foundry and AutomationWrocław University of Science and Technology50-370 WrocławW.Wyspianskiego 27Poland Institute of Product&Process Innovation Leuphana University LüneburgUniversitätsallee 121335 LüneburgGermany

Magnesium and its alloys have such advantages with lightweight, high specific strength, good damping, high castability and machinability,which make them an attractive choice for applications where weight reduction is important, such as in the aerospace and automotive ***, their practical applications are still limited because of their poor corrosion resistance, low high temperature strength and ambient formability. Based on such their property shortcomings, recently degradable magnesium alloys were developed for broadening their potential applications. Considering the degradable Mg alloys for medical applications were well reviewed, the present review put an emphasis on such degradable magnesium alloys for structural and functional applications, especially the applications in the environmental and energy fields. Their applications as fracture ball in fossil energy, sacrificial anode, washing ball, and as battery anodes, transient electronics, were summarized. The roles of alloying elements in magnesium and the design concept of such degradable magnesium alloys were discussed. The existing challenges for extending their future applications are explored.

关键词： Magnesium alloys Alloying Structural applications Degradation Mechanical property Corrosion property Fossil and hydrogen energy Fracture ball Battery anode Transient electronics Hydrogen energy

Sensor Selection and Routing Design for State Estimation over Wireless Sensor Networks

在线全文

学校读者我要写书评

暂无评论

Sensor Selection and Routing Design for State Estimation ove...

乙烷PBI/H_3PO_4质子传导膜燃料电池性能

第36届中国控制会议

作者： Yuchi Wu Takuya Iwaki Junfeng Wu karl Henrik Johansson Ling Shi Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology KTH Royal Institute of Technology

ISBN: (纸本)9781538629185

In this paper,we consider a wireless sensor network that consists of a group of sensor nodes estimating multiple independent LTI *** point-to-point link between the sensor nodes is a slow frequency-flat fading channel and the states of the channel are described by a finite-state Markov channel（FSMC） *** propose a transmission schedule of the sensors such that the overall estimation error at the remote estimator is ***,we present an event-based routing scheme with respect to channel state,i.e.,online routing among the selected sensors to ensure the zero outage-probability at a constant transmission rate with the least transmission *** channel inversion,we separate the sensor scheduling and routing as two independent *** results for a simple wireless sensor network is presented to compare the energy cost with and without event-based routing.

关键词： sensor network routing slow fading channel inversion networked control state estimation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

无机化学学报 2010年第1期26卷 132-137页

作者：陈建军钟理 Chuang karl 华南理工大学化学与化工学院广州510640 阿伯塔大学材料工程与化学工程系

研究了以乙烷作为燃料、掺杂了H3PO4的聚苯并咪唑(PBI)材料作为质子传导膜、Pt/C作为电极催化剂构成的燃料电池电化学性能。采用溶液铸造法制备了PBI/H3PO4质子传导膜,考察了在PBI膜中H3PO4的掺杂量与时间的关系及乙烷气体在增湿和不增... 详细信息

研究了以乙烷作为燃料、掺杂了H3PO4的聚苯并咪唑(PBI)材料作为质子传导膜、Pt/C作为电极催化剂构成的燃料电池电化学性能。采用溶液铸造法制备了PBI/H3PO4质子传导膜,考察了在PBI膜中H3PO4的掺杂量与时间的关系及乙烷气体在增湿和不增湿条件下PBI/H3PO4燃料电池的电化学性能;探讨了电池的反应机理及不同操作温度对电池性能的影响。结果表明,PBI膜H3PO4适宜的掺杂时间为8h,电解质中掺杂600mol%H3PO4;乙烷气体增湿后,电池性能变好;操作温度提高,电化学反应速率加快,电池的输出电流与功率密度增加。结构为C2H6,(Pt/C阳极)/PBI/H3PO4膜/(Pt/C阴极),O2的单电池,在200℃和0.1Mpa、乙烷气体的湿度从0增加到0.02kgH2O/kg乙烷时,电池的最大输出电流密度从1.5mA·cm-2增加到34mA·cm-2,最大功率密度从0.33mW·cm-2增加到5.5mW·cm-2。

关键词：聚苯并咪唑(PBI) 燃料电池乙烷膜电极组装(MEA)

Rapid generation of recombinant Pseudomonas putida secondary metabolite producers using yTREX

在线全文

学校读者我要写书评

暂无评论

Synthetic and Systems Biotechnology 2017年第4期2卷 310-319页

作者： Andreas Domrose Robin Weihmann Stephan Thies karl-Erich Jaeger Thomas Drepper Anita Loeschcke Institute of Molecular Enzyme Technology Heinrich Heine University DüsseldorfForschungszentrum JülichJülichGermany Bioeconomy Science Center(BioSC) Forschungszentrum JülichJülichGermany Institute of Bio-and Geosciences(IBG-1) Forschungszentrum JülichJülichGermany

Microbial secondary metabolites represent a rich source of valuable compounds with a variety of applications in medicine or *** exploitation of this wealth of chemicals requires the functional expression of the respective biosynthetic genes in amenable heterologous *** have previously established the TREX system which facilitates the transfer,integration and expression of biosynthetic gene clusters in various bacterial ***,we describe the yTREX system,a new tool adapted for one-step yeast recombinational cloning of gene *** show that with yTREX,Pseudomonas putida secondary metabolite production strains can rapidly be constructed by random targeting of chromosomal promoters by Tn5 *** of this approach was corroborated by prodigiosin production after yTREX cloning,transfer and expression of the respective biosynthesis genes from Serratia ***,the applicability of the system for effective pathway rerouting by gene cluster adaptation was demonstrated using the violacein biosynthesis gene cluster from Chromobacterium violaceum,producing pathway metabolites violacein,deoxyviolacein,prodeoxyviolacein,and *** producing both prodigiosin and violaceins could be readily identified among clones obtained after random chromosomal integration by their strong ***,the addition of a promoter-less reporter gene enabled facile detection also of phenazine-producing clones after transfer of the respective phenazine-1-carboxylic acid biosynthesis genes from Pseudomonas *** compounds accumulated to substantial titers in the mg *** thus corroborate here the suitability of *** for the biosynthesis of diverse natural products,and demonstrate that the yTREX system effectively enables the rapid generation of secondary metabolite producing bacteria by activation of heterologous gene clusters,applicable for natural compound discovery and combinatorial biosy

关键词： Synthetic biology Yeast recombinational cloning Tn5 transposition Heterologous gene cluster expression Secondary metabolite production Pseudomonas putida

Suitability of Hermetia illucens larvae meal and fat in broiler diets:effects on animal performance,apparent ileal digestibility,gut histology,and microbial metabolites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2022年第5期13卷 1386-1401页

作者： Kristina Hartinger Katharina Froschl Marco Antonio Ebbing Barbara Bruschek-Pfleger karl Schedle Christiane Schwarz Martin Gierus Department of Agrobiotechnology Institute of Animal NutritionLivestock Productsand Nutrition PhysiologyUniversity of Natural Resources and Life SciencesViennaAustria

Background:The possibility of partially replacing soybean meal(SBM)with Hermetia illucens(HI)defatted larvae meal in broiler nutrition has frequently been *** sustainability reasons,however,the larvae fat produced during defatting should also be used and could be particularly beneficial regarding gut health due to its fatty acid *** evaluate the suitability of HI larvae as protein and fat source,a 2×3 factorial arrangement with two types of protein,***(S)or SBM and 15%of its crude protein replaced by HI larvae meal(L),and three levels of fat sources,namely 0(0 L),50%(50 L)or 100%HI larvae fat(100 L)at the expense of soybean oil was ***:In the starter phase,an interaction showed higher body weight(BW),average daily gain(ADG)and improved feed conversion ratio(FCR)if 50%or 100%HI larvae fat was fed with HI larvae ***,BW,ADG and FCR improved when feeding HI larvae meal as protein ***,we observed an increased average daily feed intake in the grower,finisher,and overall phase in the L groups and an improved FCR in 0 L compared to 50 L groups during the overall *** apparent ileal digestibility,HI larvae meal feeding increased dry matter,organic matter,and fat *** HI larvae meal as protein source decreased the concentrations of agmatine,spermidine,spermine and ammonia in the caecal digesta,whereas fat source affected agmatine with higher concentrations in 50 L compared to 0 L in the colonic *** contrast,caecal ethanolamine concentrations increased in HI larvae meal groups compared to *** butyric acid concentrations decreased with HI larvae meal *** interaction was found for the jejunal villus area,being higher in L+100 L compared to S+100 ***,L groups had greater villus ***:A partial replacement of SBM with HI larvae meal and soybean oil with HI larvae fat in broiler diets without impairing animal performance or gut health seems possible

关键词： Broiler chicken Hermetia illucens Larvae fat Larvae meal Lauric acid Microbial metabolites Performance

Unexpected formation of hydrides in heavy rare earth containing magnesium alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2016年第3期4卷 173-180页

作者： Yuanding Huang Lei Yang Sihang You Weimin Gan karl Ulrich Kainer Norbert Hort Institute of Materials Research Helmholtz-Zentrum GeesthachtZentrum für Material-und KüstenforschungMax-Planck-Str.121502 GeesthachtGermany Key Laboratory for Anisotropy and Texture of Materials Education Ministry of ChinaSchool of Materials Science and EngineeringNortheastern UniversityShenyang 110819China

Mg–RE(Dy,Gd,Y)alloys show promising for being developed as biodegradable medical *** is found that the hydride REH_(2) could be formed on the surface of samples during their preparations with water *** amount of formed hydrides in Mg–RE alloys is affected by the content of RE and heat *** increases with the increment of RE *** the surface of the alloy with T4 treatment the amount of formed hydride REH_(2) is *** contrast,the amount of REH2 is lower on the surfaces of as-cast and T6-treated *** formation mechanism is attributed to the surface reaction of Mg–RE alloys with *** part of RE in solid solution in Mg matrix plays an important role in influencing the formation of hydrides.

关键词： Magnesium alloy Microstructure Hydride Heat treatment Rare earths

Proteome alterations in aqueous humour of primary open angle glaucoma patients

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2020年第1期13卷 176-179页

作者： Hanhan Liu Fabian Anders Sebastian Funke karl Mercieca Franz Grus Verena Prokosch Department of Ophthalmology University Medical Center of the Johannes Gutenberg University MainzMainz 55131Germany Experimental and Translational Ophthalmology Department of OphthalmologyUniversity Medical Center of the Johannes Gutenberg University MainzMainz 55131Germany Royal Eye Hospital School of MedicineUniversity of ManchesterManchester M202ULUnited Kingdom

AIM: To unravel the primary open angle glaucoma(POAG) related proteomic changes in aqueous humour(AH).METHODS: Totally 35 patients listed for cataract surgery(controls: n=12, age: 67.4±13.6 y) or trabeculectomy for POAG(n=23, age: 72.5±8.3 y) were included. AH samples of those patients were obtained during cataract surgery or trabeculectomy. AH samples were subsequently pooled into the experimental groups under equal contribution in terms of protein amount of each individual patient. Protein samples were analyzed by a linear trap quadrupol Orbitrap Mass Spectrometry device with an upstream liquid chromatography system. The obtained raw data were analyzed using the Maxquant proteome software and compared. Proteins with a fold-change ratio higher than a cut-off of 2 were considered as noticeably ***: A total number of 175 proteins could be identified out of the AH from POAG and cataract by means of quantitative mass spectrometric analysis. Apolipoprotein D(fold change, 3.16 times), complement C3(2.96), pigment epithelium-derived factor(2.86), dickkopf-related protein 3(2.18) and wingless-related integration(Wnt) inhibitory factor 1(2.35) were significantly upregulated within the AH of glaucoma compared to cataract serving as ***: AH provides a tool to analyze changes in glaucoma and shows striking changes in Wnt signaling inhibitory molecules and other proteins.

关键词： primary open angle glaucoma aqueous humor proteomics Wnt signaling pathway

Einstein-Local Counter-Arguments and Counter-Examples to Bell-Type Proofs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Physics 2023年第2期14卷 89-100页

作者： karl Hess Center for Advanced Study University of Illinois Urbana USA

J. S. Bell’s well-known proofs of inequalities (and related work) are shown to be invalidated by two counter-arguments (-examples) that are based on Einstein-local propositions: Bell-type inequalities of Einstein-Podolsky-Rosen experiments must include, as virtually all physical theories do, elements of physical reality and their mathematical representations that relate to continua as opposed to exclusively finite numbers. Furthermore, Bell-type inequalities must be valid for all possible experimental geometries that lead to the quantum result. Based on these propositions, violations of Bell-type inequalities are demonstrated without violating Einstein locality, without conspiracy type theories and even for the case that all known “loopholes” are closed.

关键词： Bell’s Inequalities Quantum Entanglement EPR Experiments

Tribological behaviors of Ni-modified citric acid carbon quantum dot particles as a green additive in polyethylene glycol

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Friction 2020年第1期8卷 182-197页

作者： Zhiqiang TU Enzhu HU Bangbang WANG karl D DAVID Philipp SEEGER Martin MONEKE Ralph STENGLER Kunhong HU Xianguo HU Department of Chemical and Materials Engineering Hefei UniversityHefei 230601China School of Mechanical Engineering Institute of TribologyHefei University of TechnologyHefei 230009China Department of Mechanical Engineering School of EngineeringUniversity of BirminghamBirmingham B152TTUnited Kingdom Darmstadt Institute of Plastics Engineering University of Applied Sciences DarmstadtDarmstadt 64295Germany

A novel green lubricating oil additive(carbon quantum dot(CQD)particle‐doped nickel(Ni‐CQD))was synthesized from citric acid and nickel *** effects of CQD and Ni‐CQD nanoparticles on the tribological behaviors of polyethylene glycol(PEG200)were investigated under different loads and reciprocation *** results indicate that CQD and Ni‐CQD particles can both enhance the lubrication properties of ***,the Ni‐CQD nanoparticles enhanced the lubrication properties more than the plain CQD particles *** average friction coefficient and wear rate of PEG200 containing 2 wt%Ni‐CQDs were reduced by 35.5%and 36.4%,respectively,compared to PEG200 containing pure CQDs under a load of 8 N and reciprocation speed of 25 mm/s over 60 *** friction and wear mechanisms are attributed to the fact that friction induces the Ni‐CQDs to participate in the formation of a tribofilm,resulting in a low friction coefficient and wear rate.

关键词： friction dynamics joint clearance numerical models impact durability