检索结果-南通市图书馆

Hydrophobicity of Highly Ordered Nanorod Polycrystalline Nickel and Silver Surfaces

在线全文

学校读者我要写书评

暂无评论

Journal of Minerals and Materials Characterization and Engineering 2019年第5期7卷 279-293页

作者： Jan Macko Natalia Podrojkova Radim Hrdy andrej orinak Renata orinakova Jaromir Hubalek Jaroslav Vojtus Zuzana Kostecka Roger M.Smith Department of Physical Chemistry University of P.J.Safarik in KosiceKosiceSlovakia Depatrment of Microelectronics Brno University of TechnologyBrnoCzech Republic Central European Institute of Technology Brno University of TechnologyBrnoCzech Republic Department of Architectural Engineering Institute of Architectural EngineeringKosiceSlovakia University of Veterinary Medicine and Pharmacy KosiceSlovakia Department of Chemistry Loughborough UniversityLoughboroughUK

Highly ordered nickel and silver nanorods arrays prepared by alumina template assisted electrodeposition were investigated to determine the effect of the array geometry on metal surface hydrophobicity and adhesion forces. The nanorod geometry, clustering and pinning were used to characterize surface hydrophobicity and its modulation. A contribution of metal crystallographic orientation to the surface energy was calculated. To characterize nanorod array surface properties and elucidate the source of the particle adhesion effects has been calculated. The dispersive components of surface tension?γSD?and surface polarizability ks, as surface features that markedly characterize hydrophobicity and adhesion, were calculated. The highest hydrophobicity was found for Ag nanorods with aspect ratio of 10 then Ni nanorods with aspect ratio 10. The same geometry of nanorods particles resulted in different surface hydrophobicity and it was ascribed to the orientation of Ag and Ni crystals formed on the top of nanorods. Due to high hydrophobicity nanorod array surfaces could be used as an antifouling surface in medicine to select areas on implant surface not to be colonized by cells and tissues.

关键词： Nanorods Silver Nickel Hydrophobicity Surface Energy Crystallinity

Interstitial Doping of SnO_(2) Film with Li for Indium-Free Transparent Conductor

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2024年第3期41卷 140-145页

作者：陈兴谦李昊臻陈伟梅增霞 Alexander Azarov andrej Kuznetsov 杜小龙 Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China Department of Physics Centre for Materials Science and NanotechnologyUniversity of OsloP.O.Box 1048BlindernN-0316 OsloNorway Guangdong SinoPrime Technology Co. Ltd.Dongguan 523808China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

SnO_(2)films exhibit significant potential as cost-effective and high electron mobility substitutes for In_(2)O_(3)*** this study,Li is incorporated into the interstitial site of the SnO_(2)lattice resulting in an exceptionally low resistivity of 2.028×10^(-3)Ω·cm along with a high carrier concentration of 1.398×10^(20)cm^(-3)and carrier mobility of 22.02 cm^(2)/V·s.

关键词： exceptional resistivity substitute

热压缩同时提高挤压镁-锰-锌合金的强度和热导率(英文)

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2024年

作者：刘海峰杨续跃张宇修 Hiromi Nagaumi 赵明纯石智勇 andrej Atrens School of Mechanical & Mining Engineering， University of Queensland Brisbane 中南大学材料科学与工程学院苏州大学钢铁学院

在这项研究中，对挤压镁-锰-锌合金进行了热压缩处理。合金在 150°C以 15:1 的挤压比挤压，然后沿着挤压方向以真应变为0.9进行热压缩。通过光学显微镜、扫描电子显微镜、电子背散射衍射和透射电子显微镜研究了挤压态和热压缩态Mg-Mn-Z... 详细信息

在这项研究中，对挤压镁-锰-锌合金进行了热压缩处理。合金在 150°C以 15:1 的挤压比挤压，然后沿着挤压方向以真应变为0.9进行热压缩。通过光学显微镜、扫描电子显微镜、电子背散射衍射和透射电子显微镜研究了挤压态和热压缩态Mg-Mn-Zn合金的微观结构、机械性能和热导率。旨在通过获得均匀、细小的显微结构、以及降低织构强度，同时提高强度和导热性。屈服强度（YS）、极限拉伸强度（UTS）和伸长率（EL）得到了显著的提高，分别提高了77%、53%和10%。热导率也得到了显著的提高，从111 W/(m·K)提高到了125 W/(m·K)。本研究阐明了热压缩改善性能的机理，为开发具有优良热性能和力学性能的镁合金提供了一条有前景的途径。

关键词：镁合金热压缩强度热导率

Numerical and experimental analyses of a stirred vessel for a large volumetric flow rate of sparged air

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2019年第10期27卷 2304-2312页

作者： andrej Bombac Jernej Pirnar Laboratory for Fluid Dynamics and Thermodynamics Faculty of Mechanical EngineeringUniversity of LjubljanaAskerceva 61000 LjubljanaSlovenia

Computational fluid dynamics(CFD)and experimental analyses of some of the basic characteristics of air sparging in a tall stirred vessel equipped with a three-stage impeller are *** impeller was assembled from a radial ABT impeller as the lower,a turbine 6 PBT45 as the middle and an axial Scaba-type 3SHP1 impeller as the *** the impellers were of the same diameter,i.e.,225 mm,while the vessel diameter was 450 *** impeller’s rotational speed was 178 r·*** aeration regime was established with an air volumetric flow rate of 28.3 m3·*** the best of our knowledge,this study is the first to consider the very high gassing rate by means of CFD in a tank stirred by three-stage axial/radial *** numerical simulation was performed using the ANSYS Fluent(R17.2,2016)code for solving the governing equations of fluid dynamics in single-and multi-phase *** discussing the bubble size distribution,a discrete population balance model(PBM)was *** CFD,the stirring power and the total void fraction(the total gas holdup)were *** results were in good agreement with the measured values using a laboratory experimental device.

关键词： Mixing Stirred vessel Aeration Multiple stirrer High gassing rate Local void fraction

Muscular abnormalities in liver cirrhosis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2021年第29期27卷 4862-4878页

作者： andrej Hari Department of Gastroenterology and Hepatology General Hospital CeljeCelje 3000SavinjskaSlovenia

Sarcopenia is becoming a well-established player in evaluating patients with chronic liver *** regarding its clinical significance and consequences in the course of liver disease have been growing;many of the data support the idea that it impacts decompensation event frequency,prolonged hospitalization,and mortality,as well as providing the possibility to better prioritize patients on lists awaiting liver *** assessing the whole clinical scope of the field,which includes malnutrition and frailty,as well as the complete spectrum of muscle mass,strength,and function,it becomes clear that a well-founded approach in everyday clinical practice is *** this respect,this article attempts to unveil the most recently published data regarding possible methods and modalities that could be used to diagnose sarcopenia as early as possible,along with the required accuracy and *** the most important field discoveries to data that need further clarification,the merits and weaknesses of the very diverse existing evaluation methods are ***,a critical overview is given,in an attempt to discern study lines of importance from those that could pose further ambiguity for the *** author also poses relevant questions that remain unanswered but are of clinical importance in the field.

关键词： Sarcopenia Liver cirrhosis Frailty Muscle strength Nutrition indices Risk factors

Distortion performance of underwater acoustic mobile networks

维普期刊数据库评论

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 Ocean Engineering and Science 2018年第4期3卷 382-389页

作者： andrej Stefanov Faculty of Engineering IBU SkopjeMacedonia

The paper considers the distortion performance of mobile underwater acoustic *** network is composed of autonomous underwater vehicles(AUV’s)that utilize multihop transmissions to route the information through the *** mobility model is direction *** distortion is evaluated in the context of an independent identically distributed(i.i.d.)Gaussian source and single description *** AUV-to-AUV channel experiences frequency dependent path loss and Ricean fading,as well as interference from other network *** examples illustrate the distortion performance.

关键词： network mobile underwater

The effect of growth conditions on the relationship between fine root and foliage biomass

维普期刊数据库评论

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 Forestry Research 2022年第5期33卷 1585-1591页

作者： Yury Karpechko Anna Karpechko andrej Tuyunen Forest Research Institute of the Karelian Research Centre of the Russian Academy of Sciences 11 Pushkinskaya St.PetrozavodskKareliaRussia 185910

This article examines the physiological relationships between fine roots and foliage, and how their biomass ratio correlates with changes in stand quality class. The biomass of fine roots ≤ 3 mm in diameter of spruce stands in the Republic of Karelia (Northwest Russia) was determined by the soil monolith method. Foliage biomass was calculated using a previously designed technique from the standing stock, average height and quality class of the stand. A relation between fine-root: foliage biomass ratio and stand quality class (representing soil fertility) has been established. The closest correlation between fine-root: foliage biomass ratio and stand quality based on soil fertility was for the 1-2 mm root fraction. Analysis of the water flux balance in the trees revealed a correlation between fine-root: foliage ratio and the ratio of the specific volume of transpiration by the stand to the specific volume of water uptake from the soil by roots. Theoretical explanations for the decrease in fine-root: foliage biomass ratios with increasing stand quality class are offered.

关键词： Fine-root biomass Foliage biomass Stand quality class Soil fertility

Recently deepened insights regarding Mg corrosion and advanced engineering applications of Mg alloys

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 3948-3991页

作者： Guang-Ling Song andrej Atrens Department of Ocean Science and Engineering Southern University of Science and Technology1088 Xueyuan BoulevardShenzhen 518055China The University of Queensland School of Mechanical and Mining EngineeringCentre for Advanced Materials Processing and Manufacturing(AMPAM)St LuciaQld 4072 Australia State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen University422 S.Siming RdXiamen 361005China

This review summarizes recent insights into the Mg corrosion mechanism, clarifies many critical controversial points regarding the Mg corrosion behaviour, and updates some efforts made to extend the industrial application of Mg alloys. Based on the new understandings gained so far, future research directions are also suggested in the review. This review has the following logic. The first section "1. Scope"is a consolidation of the new understandings or developments regarding the Mg corrosion mechanism and the new applications for Mg alloys. It also highlights some key points for the review. The second section "2. Widely accepted knowledge" briefly summarizes the general understanding of Mg corrosion gained so far, which acts as the foundation for the following sections. The third section "3. Recently deepened insights" mainly briefs on some new insights into Mg corrosion phenomena based on recent findings. Different interpretations on the corrosion behaviours are comprehensively discussed in the fourth section "4. Controversial points" and the conclusions are drawn in the subsection"4.5 Clarified points". Apart from the fundamental understandings, various efforts in the application of Mg alloys are presented in the fifth section "5. New applications". Following the research tendency as indicated in the review, prioritized research areas are suggested in "*** directions". The review is concluded with "7. Concluding remarks" at last.

关键词： Mg Corrosion Hydrogen Anode Intelligentization

Building towards a standardised approach to biocorrosion studies: a review of factors influencing Mg corrosion in vitro pertinent to in vivo corrosion

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2018年第4期61卷 475-500页

作者： Sean Johnston Matthew Dargusch andrej Atrens The University of Queensland Materials Engineering Division School of Mechanical ＆ Mining Engineering Brisbane Qld 4072 Australia The University of Queensland Centre for Advanced Materials Processing and Manufacturing （AMPAM） Brisbane Qld 4072 Australia

The factors that influence magnesium（Mg）corrosion in vitro are systematically evaluated from a review of the relevant literature. We analysed the influence of the following factors on Mg biocorrosion in vitro：（i） inorganic ions,including both anions and cations,（ii） organic components such as proteins, amino acids and vitamins, and（iii） experimental parameters such as temperature, p H, buffer system and flow rate. Considerations and recommendations towards a standardised approach to in vitro biocorrosion testing are given. Several potential simulated body fluids are recommended. Implementing a standardised approach to experimental parameters has the potential to significantly reduce variability between in vitro biocorrosion tests, and to help build towards a methodology that accurately and consistently mimics in vivo corrosion. However, there are also knowledge gaps with regard to how best to characterise the in vivo environment and corrosion mechanism. The assumption that blood plasma is the correct bodily fluid upon which to base in vitro methodologies is examined, and factors that influence the corrosion mechanism in vivo, such as specimen encapsulation, bear consideration for further studies.

关键词： corrosion biocorrosion magnesium biodegradable metals in vitro in vivo