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Ab-Initio Study of.Cobalt Impurity Ef.ects on Phonon Spectra, Mechanical and Thermal Properties of.Single wall Carbon Nanotube （5,0）

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Chinese Physics Letters 2014年第4期31卷 110-113页

作者： H. Tashakori B. Khoshnevisan f. Kanjouri f.culty of.Physics University of Kashan Kashan Iran f.culty of.Physics Kharazmi University Karaj Iran

We use density f.nctional perturbation theory based on the pseudo-potential to calculate the phonon spectrum, phonon density of.states, specif.c heat capacity and mechanical properties of.pristine and cobalt doped （5,0） single wall carbon nanotube （CNT）. In the calculations, we consider one Co atom in the center of.the unit cell of.the tube and it is shown that the pristine （5~0） CNT is nonmagnetic while the Co-doped tube becomes magnetic. Young＇s modulus f.r both systems is about 1 TPa （＇af.er Co-doping it goes slightly higher） and the Poisson ratio f.r the pristine tube becomes quite a bit larger than the doped one. On the other hand, the calculated value of.radial breath mode f.r the pristine CNT is in good agreement with the experimental reports while af.er Co-doping it is increased. In addition, heat capacity of.the doped CNT is reduced, which leads to some important empirical applications.

关键词： CHEMICAL vapor deposition DENSITY f.nctional theory PERTURBATION (Mathematics) CARBON nanotubes POISSON'S ratio

A review of.landscape ecology experiments to understand ecological processes

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Ecological Processes 2022年第1期11卷 802-811页

作者： Yolanda f.Wiersma Department of.Biology Memorial UniversitySt.John’sNL A1C 5S7Canada

Background:One way in which we make inf.rences about ecological processes is via *** ecological processes happen at landscape extents and it is at this extent that experimentation is more *** review explores the intersection between experimentation,ecological processes and landscape ***,this review seeks to discover how scientists design experiments to understand ecological processes at landscape ***:I f.und 87 papers where these three concepts intersected,and reviewed them in more depth to assess characteristics of.scale(treatment and study area extent),replication,research question and experiment ***:The f.ndings suggest that experimental approaches f.r understanding ecological processes are well established,and beginning to more readily accommodate spatial ***,there is room to integrate more spatially explicit,landscape-scale experiments into studies of.ecological processes.

关键词： Inf.rence Landscape ecology Manipulative experiment Observational experiment Scale

Thermal Spray Coating of.Tungsten f.r Tokamak Device

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Plasma Science and Technology 2006年第2期8卷 164-167页

作者：蒋显亮 f. GITZHOf.R M.I. BOULOS Institute of.Surf.ce and Coatings Technology Central South University Changsha 410083 China Plasma Technology Research Center University of Sherbrooke Sherbrooke J1K 2R1Canada

Thermal spray, such as direct current （d.c.） plasma spray or radio f.equency induced plasma spray, was used to deposit tungsten coatings on the copper electrodes of.a tokamak device. The tungsten coating on the outer surf.ce of.one copper electrode was f.rmed directly through d.c. plasma spraying of.f.ne tungsten powder. The tungsten coating/lining on the inner surf.ce of.another copper electrode could be f.rmed indirectly through induced plasma spraying of.coarse tungsten powder. Scanning electron microscopy （SEM） was used to examine the cross section and the interf.ce of.the tungsten coating. Energy Dispersive Analysis of.X-ray （EDAX） was used to analyze the metallic elements attached to a separated interf.ce. The inf.uence of.the particle size of.the tungsten powder on the density, cracking behavior and adhesion of.the coating is discussed. It is f.und that the coarse tungsten powder with the particle size of.45-75μm can be melted and the coating can be f.rmed only by using induced plasma. The coating deposited f.om the coarse powder has much higher cohesive strength, adhesive strength and crack resistance than the coating made f.om the f.ne powder with a particle size of.5μm.

关键词： tokamak device copper electrode thermal spray tungsten coating tungsten/copper interf.ce

Use of.f.rricyanide f.r gold and silver cyanidation

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中国有色金属学会会刊：英文版 2009年第3期19卷 714-718页

作者： f. XIE D. B. D REISINGER Department of.Materials Engineering University of British Columbia

Low gold and silver leaching kinetics has been commonly observed in traditional gold-silver cyanidation process, especially in heap leaching and in situ leaching operations. The dif.erent mineralogy of.gold and silver in the ores is suspected to be the main reason, e.g., the occurrence of.low solubility acanthite (Ag2S) typically results in low overall silver extraction. Due to the low solubility of.oxygen in cyanide solution, the reactivity and availability of.oxidant is believed to be the critical limitation f.r gold and silver dissolution. The use of.f.rricyanide as the auxiliary oxidant f.r gold and silver cyanidation has been examined. The rotating disc test results prove the assistant ef.ect of.f.rricyanide on increasing the dissolution rate of.gold and silver. The potential use of.f.rricyanide in gold/silver cyanidation process is proposed based on the leaching results of.actual ores.

关键词：氰化工艺金银浸出动力学铁助氧化剂氰化物溶液旋转圆盘溶解度

Current taxane f.rmulations and emerging cabazitaxel delivery systems

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Nano Research 2018年第10期11卷 5193-5218页

作者： Boyang Sun Robert M. Straubinger Jonathan f. Lovell Department of.Biomedical Engineering University at Buffalo State University of New York Buffalo NY 14260 USA Department of.Chemical and Biological Engineering University at Buffalo State University of New York Buffalo NY 14260 USA Department of.Pharmaceutical Sciences University at Buffalo State University of New York Buffalo NY 14214 USA

Cabazitaxel is a second-generation taxane with promising anti-tumor activity and is approved f.r treating hormone-ref.actory metastatic prostate cancer previously treated with docetaxel. Although f.rst-generation taxanes （i.e. paclitaxel and docetaxel） have sparked broad interest in a variety of.drug delivery vehicles, f.wer have yet been developed f.r cabazitaxel. This review summarizes several clinical-stage approaches f.r taxane f.rmulation and recent ef.orts to develop novel cabazitaxel delivery systems.

关键词： cabazitaxel Jevtana taxanes drug delivery systems nanocarriers

THE STUDY Of.AIRPORTTERRAIN Ef.ECTS ON AUTOLAND f.R ANY AIRPLANE

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航空学报 1993年第12期 596-602页

作者： Sai f. Lee No 804 Perry Arc. Montebello Ca 90640 Dr

The terrain prof.le at several airports has caused some dif.iculty with autolands on the DC-10 and MD-80. Some operators have reported that the pilot had to disconnect the f.ight guidance system during f.are and land manually. At present, the autoland guidance system is not uniquely designed to handle the variations of.terrain. Since there is no accurate substitute f.r radio altitude(h) the only variable lef. to improve is radio altitude rate (h).

关键词： THE STUDY Of.AIRPORTTERRAIN Ef.ECTS ON AUTOLAND f.R ANY AIRPLANE Case rate high 丰剑

Ef.ects of.Strain Rate and Def.rmation Temperature on Microstructures and Hardness in Plastically Def.rmed Pure Aluminum

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Journal of.Materials Science & Technology 2011年第1期27卷 1-7页

作者： f. Huang N.R. Taot K. Lu Shenyang National Laboratory f.r Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang110016 China

The microstructures and hardness of.pure Al samples subjected to plastic def.rmation with dif.erent tem- peratures and strain rates were investigated. The results showed that the strain-induced grain ref.nement is signif.cantly benef.ted by increasing strain rate and reducing def.rmation temperature. The saturated size of.ref.ned subgrains in Al can be as small as about 240 nm in cryogenic dynamic plastic def.rmation （DPD）. Grain boundaries of.the DPD Al samples are low-angle boundaries due to suppression of.dynamic recovery during def.rmation. Agreement of.the measured hardness with the empirical Hall-Petch relation extrapolated f.om the coarse-grained Al implies that the low-angle boundaries can contribute to strengthening as ef.ective as the conventional grain boundaries.

关键词： Dynamic plastic def.rmation Microstructure Hardness Strain rate Temperature

Recovery of.rare and precious metals f.om urban mines —— A review

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f.ontiers of.Environmental Science & Engineering 2017年第5期11卷 3-19页

作者： Mengmeng wang Quanyin Tan Joseph f. Chiang Jinhui Li Key Laboratory f.r Solid waste Management and Environment Saf.ty (Tsinghua University) Ministry of Education of China School of Environment Tsinghua University Beijing 100084 China Department of.Chemistry and Biochemistry State University of New York College at Oneonta Oneonta NY 13820 USA

Urban mining is essential f.r continued natural resource extraction. The recovery of.rare and precious metals （RPMs） f.om urban mines has attracted increasing attention f.om both academic and industrial sectors, because of.the broad application and high price of.RPMs, and their low content in natural ores. This study summarizes the distribution characteristics of.various RPMs in urban mines, and the advantages and shortcomings of.various technologies f.r RPM recovery f.om urban mines, including both conventional （pyrometallurgical, hydrometallurgical, and biometallurgical processing）, and emerging （electrochemical, supereritieal f.uid, mechanochemical, and ionic liquids processing） technologies. Mechanical/physical technologies are commonly employed to separate RPMs f.om nonmetallic components in a pre-treatment process. A pyrometallurgical process is of.en used tbr RPM recovery, although the expensive equipment required has limited its use in small and medium-sized enterprises. Hydrometallurgical processing is ef.ective and easy to operate, with high selectivity of.target metals and high recovery ef.iciency of.RPMs, compared to pyrometallurgy. Biometallurgy, though, has shown the most promise f.r leaching RPMs f.om urban mines, because of.its low cost and environmental f.iendliness. Newly developed technologies electrochemical, supercritical f.uid, ionic liquid, and mechanochemical have of.ered new choices and achieved some success in laboratory experiments, especially as ef.icient and environmentally f.iendly methods of.recycling RPMs. With continuing advances in science and technology, more technologies will no doubt be developed in this f.eld, and be able to contribute to the sustainability of.RPM mining.

关键词： Rare and precious metals (RPMs) Distribution characteristics Recycling technology Emerging technology Supercritical f.uid

Quantitative classif.cation of.Camellia japonica and Camellia rusticana(Theaceae)based on leaf.and f.ower morphology

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Plant Diversity 2021年第3期43卷 216-224页

作者： Harue abe Hiroki Miura Yoshitaka Motonaga Center f.r Sustainable Agriculture and f.restry Faculty of AgricultureNiigata University94-2 KodaSadoNiigata952-2206Japan Aomori Pref.ctural Asamushi Aquarium 1-25 BabayamaAsamushiAomoriAomori039-3501Japan f.culty of.Agriculture Niigata University8050 Ikarashi-ninochoNishi-kuNiigata950-2181Japan

In Japan,Camellia japonica and Camellia rusticana are naturally *** dif.erences in their habitats and morphologies,they have been classif.ed by various researchers as either varieties,subspecies,or *** taxonomic position of.*** and *** remain unclear because morphological comparisons have been restricted to limited areas and quantitative data are *** grows in snowy places,unlike *** *** displays ornithophily,*** displays *** species have adapted to dif.erent growing environments and pollinators,which have altered the morphology of.f.owers and *** theref.re quantitatively estimated the dif.erentiation between these two taxa by comparing the morphologies of.leaf.hypodermis,f.ower f.rm,petal color,and f.lament color in twenty *** f.ndings allowed us to dif.erentiate these two species by the presence or absence of.a leaf.*** also discovered an intermediate type of.leaf.hypodermis,which might also be caused by *** component analysis(PCA)indicated that the f.ower morphologies between these species were signif.cantly *** petal and f.lament colors were also signif.cantly *** quantitative analysis suggests that speciation caused by dif.erences in both pollinators and environment is one of.the f.ctors involved in this *** f.ndings in *** and *** help to explain speciation processes f.r other species as well.

关键词： Camellia japonica Camellia rusticana Ecological isolation Pollinator shif. Pollination syndrome Reproductive isolation