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Structure and Properties of Chemically-reduced Functionalized Graphene Oxide Platelets

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Journal of Materials Science & Technology 2015年第5期31卷 458-462页

作者： A.Pruna d.Pullini d.Busquets University of Bucharest 405 Atomistilor Str077125 Bucharest-MagureleRomania Institute of Materials Technology University Politecnica of ValenciaCamino de Vera s/n46022 ValenciaSpain Fiat Research Centre

Green reduction of graphene oxide(GO) functionalized with 3-aminopropyltriethoxysilane and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride/N-hydroxysuccinimide was performed by using ascorbic acid and sodium *** obtained materials were characterized by thermo-gravimetric analysis,transmission electron microscopy.X-ray diffraction,UV-Vis,Fourier transform infrared and Raman spectroscopy *** results indicated a strong dependence of the materials properties such as deoxygenation degree,absorption peak shift,crystallite size and functionalization degree on the functionalization approach and reducing agent.

关键词： Covalent functionalization Graphene oxide Reductio

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油气藏潜在泄漏对资源评价的影响

国外石油动态 2004年第22期 1-11页

作者： I．lerche J．A．Mackay 谢力

当有可能存在与构造相交的开口断层时，就要对在这种有可能泄漏油气的十字构造闭合中发现的可能资源进行评价。由于我们不知道构造中是否存在假定的油气——即使它们存在，它们是否填充了可能发生泄漏的区域?——因此，这样的评估必然... 详细信息

当有可能存在与构造相交的开口断层时，就要对在这种有可能泄漏油气的十字构造闭合中发现的可能资源进行评价。由于我们不知道构造中是否存在假定的油气——即使它们存在，它们是否填充了可能发生泄漏的区域?——因此，这样的评估必然是随机的。这里，我们描述了影响资源评估不确定性的两个主要因素：第一个因素是结果的不确定性，第二个因素是资源评估所用的参数每个都具有不确定性。这两类不确定性在评价资源的期望值和它的总不确定性时都要考虑。还评价了发现超过特定值资源的概率，包括两种不确定性成分。还评价了控制不确定性的特定参数。简单数值图例显示了我们如何用该方法在实际情况下来评价单一成分并适当地处理以获得更多的信息价值和信息类型，从而缩小泄露断层的可能存在引起的不确定性范围。

关键词：不确定性资源评估缩小区域资源评价信息价值影响实际特定值期望值

The Effect of External Magnetic Field on Electron Scale Kelvin–Helmholtz Instability

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Research in Astronomy and Astrophysics 2024年第9期24卷 236-247页

作者： d.Tsiklauri Joule Physics Laboratory School of ScienceEngineering and EnvironmentUniversity of SalfordManchesterM54WTUK

We use particle-in-cell,fully electromagnetic,plasma kinetic simulation to study the effect of external magnetic field on electron scale Kelvin–Helmholtz instability(ESKHI).The results are applicable to collisionless plasmas when,e.g.,solar wind interacts with planetary magnetospheres or a magnetic field is generated in AGN *** find that as in the case of magnetohydrodynamic(MHd)KHI,in the kinetic regime,the presence of an external magnetic field reduces the growth rate of the *** the MHd case,there is a known threshold magnetic field for KHI stabilization,while for ESKHI this is to be analytically *** a kinetic analytical expression,we use several numerical simulation runs to establish an empirical dependence of ESKHI growth rate,Γ(B_(0))ω_(pe),on the strength of the applied external magnetic *** find the best fit is hyperbolic,Γ(B_(0))ω_(pe)=Γ_(0)ω_(pe)/(A+BB_(0)),where Γ_(0) is the ESKHI growth rate without an external magnetic field and B_(0)=B_(0)/B_(MHd)is the ratio of external and two-fluid MHd stability threshold magnetic field,derived *** analytical theory to back up this growth rate dependence on the external magnetic field is *** results suggest that in astrophysical settings where a strong magnetic field pre-exists,the generation of an additional magnetic field by the ESKHI is suppressed,which implies that nature provides a“safety valve”—natural protection not to“over-generate”magnetic field by the ESKHI ***,we find that our two-fluid MHd threshold magnetic field is the same(up to a factor √γ_(0))as the dC saturation magnetic field,previously predicted by fully kinetic theory.

关键词： instabilities magnetic fields plasmas Sun:heliosphere ISM:magnetic fields

Elastic modulus and hardness of cortical and trabecular bovine bone measured by nanoindentation

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中国有色金属学会会刊：英文版 2006年第B02期16卷 744-748页

作者： HOdGSON P d Centre for Material and Fibre Innovationdeakin University Geelong VIC 3217Australia

The elastic modulus and hardness of several microstructure components of dry bovine vertebrae and tibia have been investigated in the longitude and transverse directions using nanoindentation. The elastic modulus for the osteons and the interstitial lamellae in the longitude direction were found to be (24.7±2.5) GPa and (30.1±2.4) GPa. As it's difficult to distinguish osteons from interstitial lamellae in the transverse direction, the average elastic modulus for cortical bovine bone in the transverse direction was (19.8±1.6) GPa. The elastic modulus for trabecular bone in the longitude and transverse direction were (20±2) GPa and (14.7±1.9) GPa respectively. The hardness also varied among the microstructure components in the range of 0.41-0.89 GPa. Analyses of variance show that the values are significantly different.

关键词：牛骨弹性模量硬度骨皮质骨小梁纳米压痕法测量生物力学

Tsallis agegraphic dark energy model with the sign-changeable interaction

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Communications in Theoretical Physics 2020年第1期72卷 96-101页

作者： Y d Xu School of Science Jiangsu Ocean UniversityLianyungang 222005China

In this paper,we study the evolution of a spatially flat universe composed of Tsallis agegraphic dark energy(TAdE)and a pressureless dark matter(dM),by assuming that there is a signchangeable interaction between TAdE and *** density,deceleration parameter and the equation of state parameters(EoS)show satisfactory behaviors in the *** analysis we find that the accelerated expansion of the universe can be achieved at the late time if model parametersδ>2 and-2/3dE model by means of statefinder diagnostic and w–w’analysis.

关键词： Tsallis agegraphic dark energy cosmological evolution statefinder w–w’analysis

Solutions to the Modified Poschl-Teller Potential in d-dimensions

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Chinese Physics Letters 2010年第4期27卷 9-12页

作者： d. Agboola department of Pure and Applied Mathematics Ladoke Atdntola University of Technology Oyo State P.M.B. 4000 Nigeria

An approximate solution of the d-dimensional Schrodinger equation with the modified Posehl-Teller potential is obtained with an approximation of the centrifugal term. Solution to the corresponding hyper-radial equation is given using the conventional Nikiforov-Uvarov method. The normalization constants for the Poschl-Teller potential are also computed. The expectation values of 〈r^-2 and 〈V（r）〉 are also obtained using the Feynman- Hellmann theorem.

关键词： Quantum information and quantum mechanics

带有骨骼肌dHP受体致周期性低K＋肌麻痹性突变的心肌L－型钙离子通道的表达和功能特征

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医学信息 1996年第8期 33-34页

作者：Ｌｅｒｃｈｅ─Ｈ,王海芳摘译

带有骨骼肌ＤＨＰ受体致周期性低Ｋ＋肌麻痹性突变的心肌Ｌ－型钙离子通道的表达和功能特征。［德］Ｌｅｒｃｈｅ┐Ｈ，ｅｔａｌ．Ｐｆｌｕｇｅｒｓ┐Ａｒｃｈ．１９９６；４３１（３）：４６１～３人骨骼肌ＤＨＰ受体的α１亚基ⅡＳ４... 详细信息

带有骨骼肌ＤＨＰ受体致周期性低Ｋ＋肌麻痹性突变的心肌Ｌ－型钙离子通道的表达和功能特征。［德］Ｌｅｒｃｈｅ┐Ｈ，ｅｔａｌ．Ｐｆｌｕｇｅｒｓ┐Ａｒｃｈ．１９９６；４３１（３）：４６１～３人骨骼肌ＤＨＰ受体的α１亚基ⅡＳ４最外面的精氨酸为组氨酸取代时会引起...

关键词：肌麻痹钙离子凝血因子Ⅳ dHP 骨骼肌心肌受体周期性

Aquatic community structure and stream habitat in a karst agricultural landscape

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Ecological Processes 2022年第1期11卷 155-170页

作者： Neal d.Mundahl Erik d.Mundahl department of Biology and Southeastern Minnesota Water Resources Center Winona State UniversityWinonaMN 55987USA Mundahl Nordic Services Glennallen/McCarthyP.O.Box MXYAlaska 99588USA

Background:Watersheds dominated by agriculture often have significant,negative impacts on local stream habitats and *** study examined stream biota and habitats within an entire stream in a karst agricultural landscape to determine if several decades of watershed conservation and management had reversed the severe degradation caused by poor land use and catastrophic soil erosion during the 1920s and ***:Fish communities and stream habitats were degraded at over half of the 22 stream sites examined,and benthic macroinvertebrate communities were mostly poor throughout the entire *** fish communities were associated with missing or narrow riparian buffers,high percent fine sediments,high embeddedness of coarse sub-strates,and homogeneous run *** communities were dominated by filter-feeding taxa and those adapted to life on or within fine *** sites with wide buffers and influenced by groundwater springs had higher fish community integrity and good to excellent instream ***:Our results suggest that wide riparian buffers and karstic springs may have allowed recovery of some stream reaches,but more extensive buffers and additional soil conservation practices in upland areas likely are necessary to protect most stream segments and their biota from on-going agricultural *** state stream buffer laws instituted after this study resulted in establishment of vegetated buffers at all study sites,which may lead to improved stream habitat and biotic communities in future *** invertebrate community improvement also may require translocation of sensitive taxa from nearby watersheds due to limited dispersal abilities of many species currently absent from the study *** frequency and intensity of storm events and flooding may hinder future recovery of stream habitats and biota.

关键词： Agricultural stream Fish Macroinvertebrates Stream habitats Karst

Sustainable oil-in-water analysis using a supercritical fluid carbon dioxide extraction system directly interfaced with infrared spectroscopy

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Journal of Environmental Sciences 2010年第9期22卷 1462-1468页

作者： Edward d.Ramsey School of Chemical Engineering University of Science and Technology Liaoning

A direct aqueous supercritical fluid extraction （SFE） system using carbon dioxide provides a sustainable means by which a vast range of industries may continue to depend on well established infrared （IR） techniques to determine oil-in-water. The SFE-IR method provides an environmentally friendly substitute for current national standard IR reference methods for measuring oil-in-water that rely on using increasingly restricted ozone depleting solvents whose manufacture is being phased out in accordance with international law. The SFE-IR analysis of a 500 mL water sample can be accomplished in 15 min. A rapid on-line SFE-IR calibration method has been implemented. With this calibration method, SFE-IR accuracy for determining diesel oil in 500 mL spiked water samples using single wave number measurement was 86.0%-98.8% with precision （RSd） ranging from 2.5%-7.0%. Using a general purpose calculation which involves measuring infrared absorbance values at three different wave numbers, SFE-IR method accuracy for determining diesel oil in 500 mL spiked water samples was 83.7%-92.2% with RSd 1.0%-9.3%. data is presented that indicates current long established national standard IR reference methods involving three wave number calculations should be reviewed since, without careful consideration, the inclusion of calculated aromatic hydrocarbon species contributions to final oil-in-water concentration values may provide less accurate results.

关键词： oil-in-water supercritical fluid extraction infrared spectroscopy sustainable green technology