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Materials Sciences and Applications 2012年第6期3卷 363-368页

作者： Daniele M.H.Martinelli Dulce M.A.melo Anne M.Garrido Pedrosa Antonio E.Martinelli marcus a.de f.melo Mary K.S.Batista Roberto C.Bitencourt department of Chemistry Federal University of Rio Grande do NorteCCETNatalBrazil department of Chemistry Federal University of SergipeCCETSao CristóvaoBrazil Research Center Petrobras—Cenpes Rio de JaneiroBrazil

In the current work, LaNiO3 perovskite was synthesized using the polymeric precursor method. The materials were thermally treated at 300°C for 2 hours, subsequently supported on alumina or zirconia and finally calcined at 800°C for 4 hours. The resulting samples were characterized by X-ray diffraction, thermogravimetry, BET surface area and thermo-programmed reduction. Steam reforming reactions were carried out at 750°C and 6 bar during 4 hours using a pilot reactor under a H2O:CH4 ratio of 2.5. The mass of catalysts was about 5.7 g. X-ray diffraction patterns confirmed the formation of the perovskite structure in all samples prepared. The results also showed that lanthanum nickelate was more efficient when supported on alumina than zirconia. finally, it was observed that the methane conversion was approximately 94% and the selectivity to hydrogen was about 70%. In all cases low selectivity to CO and CO2 was verified.

关键词： Lanthanum Nickelate Perovskite Polymeric Precursor Method Steam Reforming Reaction

The effect of Laves phases and nano-precipitates on the electrochemical corrosion resistance of Mg-Al-Ca alloys under alkaline conditions

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Journal of Magnesium and Alloys 2024年第6期12卷 2447-2461页

作者： Markus felten Veronika Chaineux Siyuan Zhang Ali Tehranchi Tilmann Hickel Christina Scheu Joshua Spille Marta Lipińska-Chwałek Joachim Mayer Benjamin Berkels marcus Hans Imke Greving Silja flenner Sandra Sefa Daniela Za.der Chair of Corrosion and Corrosion Protection RWTH Aachen UniversityAachen 52072 Germany Max-Planck-Institut für Eisenforschung GmbH Düsseldorf 40237 Germany Central facility for Electron Microscopy RWTH Aachen UniversityAachen 52074 Germany Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons Forschungszentrum Jülich GmbHJülich 52428Germany Mathematical Image and Signal Processing Aachen Institute for Advanced Study in Computational Engineering ScienceRWTH Aachen UniversityAachen 52062 Germany Materials Chemistry RWTH Aachen UniversityAachen 52074 Germany Institute of Materials Physics Helmholtz-Zentrum HereonGeesthacht 21502 Germany

The electrochemical corrosion mechanisms of Mg alloys were extensively studied in previous investigations of different chemical com-positions,modified surface states and various electrolyte ***,recent research focused on the active state of Mg dissolution,leading to unresolved effects of secondary phases adjacent to a stableα-solid solution passive *** present study investigates the fundamental electrochemical corrosion mechanisms of three different Laves phases with varying phase morphologies and phase fractions in the passive state of Mg-Al-Ca *** microstructure was characterized by(transmission-)electron microscopy and synchrotron-based transmission X-ray *** electrochemical corrosion resistance was determined with a standard three-electrode setup and advanced in-situ flow cell measurements.A new electrochemical activity sequence(C15>C36>α-Mg>C14)was obtained,as a result of a stable passive layer formation on theα-solid ***,nm-scale Mg-rich precipitates were identified within the Laves phases,which tend to inhibit the corrosion kinetics.

关键词： Laves phase STEM Magnesium Corrosion Passive layer

Update of cholangioscopy and biliary strictures

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World Journal of Gastroenterology 2011年第34期17卷 3864-3869页

作者： marcus W Chin Michael f Byrne department of Gastroenterology and Hepatology Vancouver General Hospital Amy Athelstan Saw fellow University of Western AustraliaPerth 6009 Australia department of Gastroenterology and Hepatology Vancouver General Hospital University of British ColumbiaVancouver V5Z1M9 Canada

Cholangioscopy remains another modality in the investigation of biliary strictures. At cholangioscopy, the"tumour vessel" sign is considered a specific sign formalignancy. Through its ability to not only visualisemucosa, but to take targeted biopsies, it has a greater accuracy, sensitivity and specificity for malignant strictures than endoscopic retrograde cholangiopancreatography guided cytopathological acquisition. Cholangioscopy however, is time consuming and costly, requires greater technical expertise, and should be reserved for the investigation of undifferentiated strictures after standard investigations have failed.

关键词：胆道狭窄敏感性胆管

Effects of a phase transition on two-pion interferometry in heavy ion collisions at √SNN=2.4-7.7 GeV

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Science China(Physics,Mechanics & Astronomy) 2023年第3期66卷 88-97页

作者： Pengcheng Li Jan Steinheimer Tom Reichert Apiwit Kittiratpattana marcus Bleicher Qingfeng Li Institut fur Theoretische Physik Johann Wolfgang Goethe Universitat FrankfurtFrankfurt am Main 60438Germany School of Science Huzhou UniversityHuzhou 313000China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China frankfurt Institute for Advanced Studies Frankfurt am Main 60438Germany GSI Helmholtzzentrum f¨urSchwerionenforschung GmbH Darmstadt 64291Germany Helmholtz Research Academy Hesse for fAIR(HfHf) GSI Helmholtz Center for Heavy Ion PhysicsCampus FrankfurtFrankfurt am Main 60438Germany Center of Excellence in High Energy Physics&Astrophysics School of PhysicsSuranaree University of TechnologyNakhon Ratchasima 30000Thailand

Hanbury-Brown-Twiss(HBT) correlations for charged pions in central Au+Au collisions at √SNN=2.4-7.7 GeV(corresponding to beam kinetic energies in the fixed target frame from Elab=1.23 to 30 GeV/nucleon) are calculated using the ultra-relativistic quantum molecular dynamics model with different equations of state(EoSs).The effects of a phase transition at high baryon densities are clearly observed in the explored HBT *** results show that the available data on the HBT radii,RO/RSand R^(2)_(O)-R^(2)_(S),in the investigated energy region favor a relatively stiff EoS at low beam energies,which then turns into a soft EoS at high collision energies consistent with astrophysical constraints on the high-density EoS of quantum chromodynamics(QCD).The specific effects of two different phase transition scenarios on RO/RSand R^(2)_(O)-R^(2)_(S)are investigated.A phase transition with a significant softening of the EoS below four times the nuclear saturation density can be excluded using HBT *** results highlight that the pion’s RO/RSand R^(2)_(O)-R^(2)_(S)are sensitive to the stiffness of the EoS and can be used to constrain and understand the QCD EoS in a high baryon density region.

关键词： heavy ion collisions HBT correlation equation of state

Differences in Judo Attack Systems Between Weight Categories

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Journal of Science in Sport and Exercise 2023年第3期5卷 263-273页

作者： Daniel Brandão Kashiwagura Javier Courel-Ibáñez felipe Brandão Kashiwagura marcus fábio Agostinho Emerson franchini Martial Arts and Combat Sports Research Group School of Physical Education and SportSport DepartmentUniversity of São PauloAv.Prof.Mello Morais65Cidade UniversitáriaSão PauloSP 05508-030Brazil faculty of Sport Sciences University of MurciaMurciaSpain Brazilian Judo Confederation Rio de JaneiroBrazil

Purpose In judo,athletes compete based on weight categories,which are required to adapt the training process accordingly,but not enough research is present to understand their *** present study aimed to verify the differences in judo attack systems performed between the seven male weight categories in world-class *** A cohort of 5847 attack systems from 1106 international judo matches was *** Chi-square auto-matic interaction detector was used to identify the association between the variables tori approach(attacker),uke approach(defender),tori’s grip,stance and direction of *** The main results showed that:(1)the grip is the main predictor of attack systems;(2)laterality exerts a strong influence on attack systems;(3)the≤81 kg and>100 kg categories were differentiated by the use of unconventional grips;(4)the≤60 kg used more kenka-yotsu(opposite sides)right stance with the Only Right Hand grip;(5)the≤81 kg category used more the ai-yotsu(same side)left stance with the Only Left Hand *** The results reported from this study can help coaches and athletes in choosing the best technical-tactical actions when developing combat strategies.

关键词： Martial arts decision tree Analysis Athletes Judoka fight dynamics

Coordinated regulation of plant immunity by poly(ADP-ribosyl)ation and K63-linked ubiquitination

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Molecular Plant 2021年第12期14卷 2088-2103页

作者： Dongsheng Yao marcus A.Arguez Ping He Andrew f.Bent Junqi Song Texas A&M AgriLife Research Center at Dallas Texas A&M University SystemDallasTX 75252USA department of Biochemistry and Biophysics Texas A&M UniversityCollege StationTX 77843USA department of Plant Pathology University of Wisconsin-MadisonMadisonWI 53706USA department of Plant Pathology and Microbiology Texas A&M UniversityCollege StationTX 77843USA

Poly(ADP-ribosyl)ation(PARylation)is a posttranslational modification reversibly catalyzed by poly(ADP-ribose)polymerases(PARPs)and poly(ADP-ribose)glycohydrolases(PARGs)and plays a key role in multi-ple cellular *** molecular mechanisms by which PARylation regulates innate immunity remain largely unknown in *** we show that Arabidopsis UBC13A and UBC13B,the major drivers of lysine 63(K63)-linked polyubiquitination,directly interact with PARPs/*** of pathogen-associated molecular pattern(PAMP)-triggered immunity promotes these interactions and enhances PARylation of *** parp1 parp2 and ubc13a ubc13b mutants are compromised in immune responses with increased accumulation of total pathogenesis-related(PR)proteins but decreased accu-mulation of secreted PR *** disulfide-isomerases(PDIs),essential components of endo-plasmic reticulum quality control(ERQC)that ensure proper folding and maturation of proteins destined for secretion,complex with PARPs/PARGs and are PARylated upon PAMP ***,PARylation of UBC13 regulates K63-linked ubiquitination of PDIs,which may further promote their disulfide isomerase activities for correct protein folding and subsequent *** together,these results indicate that plant immunity is coordinately regulated by PARylation and K63-linked ubiquitination.

关键词： UBC13 PARP1 PARP2 PDI poly(ADP-ribosyl)ation K63-linked ubiquitination secretory pathway PAMP-triggered immunity systemic acquired resistance

The role of super-spreaders in modeling of SARS-CoV-2

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Infectious Disease Modelling 2022年第4期7卷 778-794页

作者： françois Rousse marcus Carlsson MagnusÖgren Benjamin Kalischer Wella.der School of Science and Technology Örebro University70182ÖrebroSweden Centre for Mathematical Sciences Lund UniversityBox 11822100LundSweden Hellenic Mediterranean University P.O.Box 1939GR-71004HeraklionGreece Centrum för forskning och utveckling(CfUG)Region Gävleborg Sweden

In stochastic modeling of infectious diseases,it has been established that variations in infectivity affect the probability of a major outbreak,but not the shape of the curves during a major outbreak,which is predicted by deterministic models(Diekmann et al.,2012).However,such conclusions are derived under idealized assumptions such as the population size tending to infinity,and the individual degree of infectivity only depending on variations in the infectiousness *** this paper we show that the same conclusions hold true in a finite population representing a medium size city,where the degree of infectivity is determined by the offspring distribution,which we try to make as realistic as possible for *** particular,we consider distributions with fat tails,to incorporate the existence of *** also provide new theoretical results on convergence of stochastic models which allows to incorporate any offspring distribution with a finite variance.

关键词： COVID-19 Compartmental models SEIR SIR Offspring distribution for SARS-CoV-2

development of an inflatable solar dryer for improved postharvest handling of paddy rice in humid climates

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International Journal of Agricultural and Biological Engineering 2017年第3期10卷 269-282页

作者： Ana Salvatierra-Rojas marcus Nagle Martin Gummert Tom de Bruin Joachim Müller Institute of Agricultural Engineering Tropics and Subtropics GroupUniversität HohenheimGarbenstrasse 9Stuttgart 70599Germany Postharvest development Program International Rice Research Institute(IRRI)Los Baños 4031Philippines GrainPro Philippines Inc. Subic Bay 2222Philippines

Rice is the staple food for more than three billion people *** considerable progress has been made with respect to improved breeds and production practices,losses during postharvest handling remain *** and storage of paddy are two key stages where management can be *** rice,grain moisture content of 14%prevents microbiological activity,while a level of about 12%minimizes quality losses over prolonged storage *** to the need for simple and economical technologies,an inflatable solar dryer(ISD)was developed based on adaptations of the Hohenheim-type solar tunnel *** form a drying tunnel,transparent polyethylene(PE)film attaches by zipper to a reinforced black polyvinyl chloride(PVC)*** reduce heat loss,a flexible multilayer floor was used along the drying *** tunnel does not need a substructure as it is stabilized adequately from pressure created by two axial flow *** experiments,paddy was spread on the floor and mixed with a special roller *** ISD has been evaluated for paddy in the Philippines during both rainy and dry seasons and was subsequently *** drying and shade drying were carried out in parallel for comparison and product was evaluated for moisture content and quality in terms of milling recovery and head rice *** content was reduced from 23%to 14%within 26-52 h of continuous operation during the rainy season and 16%to 14%within 4-26 h of drying during the dry *** both seasons,the final moisture content of 12%was reached after prolonged drying *** was not found to be affected with respect to drying *** ISD showed advantages over sun drying,despite longer drying periods.

关键词： paddy rice postharvest handling solar dryer mobile dryer collapsible dryer Philippines

Highly insulating thermoplastic blends comprising a styrenic copolymer for direct‐current power cable insulation

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High Voltage 2022年第2期7卷 251-259页

作者： Yingwei Ouyang Amir Masoud Pourrahimi IdaÖstergren marcus Mellqvist JakobÅnevall Azadeh Soroudi Anja Lund Xiangdong Xu Thomas Gkourmpis Per‐Ola Hagstrand Christian Müller department of Chemistry and Chemical Engineering Chalmers University of TechnologyGöteborgSweden department of Electrical Engineering Chalmers University of TechnologyGöteborgSweden Innovation&Technology Borealis ABStenungsundSweden

The impact of the composition of blends comprising low‐density polyethylene(LDPE),isotactic polypropylene(PP)and a styrenic copolymer additive on the thermomechanical properties as well as the direct‐current(DC)electrical and thermal conductivity is *** presence of 5 weight percent(wt%)of the styrenic copolymer strongly reduces the amount of PP that is needed to enhance the storage modulus above the melting temperature of LDPE from 40 to 24 wt%.At the same time,the copolymer improves the consistency of the thermomechanical properties of the resulting ternary *** both the DC electrical and thermal conductivity strongly decrease with PP content,the addition of the styrenic copolymer appears to have little influence on either ***,PP in combination with small amounts of a styrenic copolymer not only allows to reinforce LDPE at elevated temperatures but also functions as an electrical conductivity‐reducing additive,which makes such thermoplastic ternary formulations possible candidates for the insulation of high‐voltage power cables.

关键词： property. blends copolymer

Implementing the virtual project management office :

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