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On the spray drying of uniform functional microparticles

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Particuology 2015年第5期13卷 1-12页

作者： W.Liu X.d.chen c.Selomulya department of chemical Engineering Monash University18 Alliance LaneClayton 3800VICAustralia department of Pharmaceutics School of Pharmaceutical SciencesCentral South University School of chemical and Environmental Engineering Soochow UniversitySuzhou Industrial Park

Spray drying is a typical method to produce particles in dry powder forms at industrial scale. Most spray-dried products often show a wide range of particle properties even within the same batch. At Monash University, we utilise a microfluidic spray drying approach to generate uniform microparticles with tightly controlled characteristics and sizes in a scalable, almost waste-flee process. The technique is useful to correlate the effects of formulation and spray drying conditions on the properties of spray-dried particles, and can be used to test new formulations for targeted applications such as encapsulation and release of active ingredients. The synthesis route can be applied to other self-assembling systems, includ- ing mesoporous, crystalline, and hierarchically structured microparticles. As spray drying is commonly used in commercial scales, the understanding of how functional particles are formed in relation to formulations and process conditions could assist in developing a cost effective, energy and material-efficient route to produce powders with better properties and ease of handling for more advanced applications such as selective adsorption and bio-separation.

关键词： Microfluidic spray drying Uniform microparticles Encapsulation controlled release

Geochemistry and geochronology of mafic rocks from the Spanish central System:constraints on the mantle evolution beneath central Spain

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Geoscience Frontiers 2020年第5期11卷 1651-1667页

作者： d.Orejana c.Villaseca M.Kristoffersen dpto.Mineralogia y Petrologia Facultad de Ciencias GeologicasUniversidad Complutense de Madrid28040MadridSpain Instituto de Geociencias IGEO(UcM CSIC)28040MadridSpain department of Geosciences University of OsloP.O.Box 1047BlindernN-0316OsloNorway

The Spanish central System(ScS)contains several suites of Palaeozoic mafic igneous intrusions with contrasting geochemical affinity:Ordovician tholeiitic metabasites,Variscan calc-alkaline gabbros(Gb1)and microdiorites(Gb2),shoshonitic monzogabbros(Gb3)and alkaline diabases and lamprophyres(Gb4).Not all of these rocks are accurately dated,and several aspects of their genesis are still poorly *** present new whole-rock geochemical data(major and trace elements,and Sr-Nd isotopes),U-Pb and Lu-Hf isotopic ratios on magmatic zircons and 40 Ar/39Ar amphibole geochronology results in order to establish a precise chronology for the successive events of magmatism in the ScS,and discuss the nature of their mantle *** ages have been determined for the Variscan gabbros(305-294 Ma),the microdiorites(299 Ma)and the accompanying felsic porphyries(292 Ma),the shoshonitic monzogabbros(285 Ma),and the alkaline diabases(274 Ma)and monzosyenites(271-264 Ma).According to this information,the Variscan mafic magmatism would be mainly concentrated in the range of 305-294 Ma,with a final manifestation represented by the minor shoshonitic *** alkaline magmatism proved to be slightly older than previously thought and yielded at least two distinct pulses:diabases and *** Hf isotopes evidence the involvement of depleted and slightly enriched mantle *** bulk of the eHf values are in the broad range of-8 to+11,indicative of melting both depleted and enriched mantle *** high within-sample Hf isotope variation(up to-11 epsilon units)shown by samples from the Variscan series(gabbros,microdiorites and monzogabbros)could be explained mainly by hybridisation of magmas derived from heterogeneous lithospheric mantle *** estimates indicate that the Variscan mafic magmas were extracted from the *** Nd-Hf isotopic composition of these suites of rocks suggests the recycling of pelitic sediments during the cad

关键词： Spanish central system Mafic magmatism Mantle sources Lu–Hf isotopes Hf–Nd decoupling Metasomatism

detection of Proper Motion in OQ208

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chinese Physics Letters 2000年第4期17卷 307-309页

作者：刘祥 c.Stanghellini d.dallacasa M.Bondi Urumqi Astronomical Observatoryj National Astronomical Observatories Chinese Academy of SciencesUrumqi 830011 Istituto di Radioastronomia del cNRt Notot Italy Uhiversita di Bolognaf Italy Istituto di Radioastronomia del cNR Bolognat Italy

We report on an ongoing work aimed to detect the separation speed of the two hot-spots of the compact symmetric object *** images at 8.4 GHz taken in 6 epoches between 1994 and 1997 we obtain an estimate of 0.058±-0.038 mas/year as the relative motions between two components of the radio *** the red-shift of OQ208 I mas correspond to 1pc,thus we obtain a projected jet speed of 0.095±*** an inclination of 45°between the jets and the line of sight,we have an actual jet velocity of 0.134±0.088c and therefore the kinematic age of the source is so young of 320±210 years.

关键词： OQ epoch separation

charge self-trapping in two strand biomolecules:Adiabatic polaron approach

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chinese Physics B 2023年第1期32卷 253-263页

作者： d chevizovich S Zdravković A V chizhov Z Ivić University of Belgrade Vinča Institute of Nuclear SciencesP.O.Box 522Belgrade 11001Serbia Joint Institute for Nuclear Research Laboratory for Radiation BiologyDubna 141980Russia dubna State University Dubna 141980Russia department of Physics University of CreteP.O.Box 2208Heraklion 71003Greece National University of Science and Technology MISiS Leninsky prosp.4Moscow 119049Russia

We investigate the properties of the excess charge(electron, hole) introduced into a two-strand biomolecule. We consider the possibility that the stable soliton excitation can be formed due to interaction of excess charge with the phonon subsystem. The influence of overlap of the molecular orbitals between adjacent structure elements of the macromolecular chain on the soliton properties is discussed. Special attention is paid to the influence of the overlapping of the molecular orbitals between structure elements placed on the different chains. Using the literature values of the basic energy parameters of the two-chain biomolecular structures, possible types of soliton solutions are discussed.

关键词： charge self-trapping adiabatic polaron soliton two-stranded biomolecules

Near resonance vibration isolation on a levered-dual response(LEdAR)coulomb-damped system by differential preloads/offsets in linear springs

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 1033-1050页

作者： T.I.TOLUWALOJU c.K.THEIN d.HALIM department of Mechanical Materials and Manufacturing EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100Zhejiang ProvinceChina Nottingham Ningbo china Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo ChinaNingbo 315048Zhejiang ProvinceChina

The levered-dual response(LEdAR)coulomb-damped system attains near resonant vibration isolation by differential preloads/offsets in linear *** takes the advantages of both the preloads/offsets in linear springs and the guiderail friction for realizing different levels of vibration *** isolation capacities are investigated on the strategies with both the horizontal and vertical guiderails,with the horizontal rail only,and without *** compressive preloads generally result in the consumption of most of the initial excitation energy so as to overcome the potential *** isolation onsets at the frequency ratio of 1∓0.095 on the left-hand side(LHS)and the right-hand side(RHS)of the lever are relative to the load plate *** observed near resonant isolation thus makes the LEdAR system a candidate for the isolation of the mechanical systems about resonance while opening a path for simultaneous harvesterisolation functions and passive functions at extreme frequencies.

关键词： lever ratio coulomb damping preload tension/compression isolation band/depth offset potential

Mathematical Simulation of Evaporating Brine by Solar Radiation for the Production of Salt

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Journal of Thermal Science 1993年第2期2卷 143-151页

作者： Y.Z.Zhang c.d.Li 等 dept.ofEngineeringThermophysics UniversityofScienceandTechnologyofCHinaHefeiAnhui230026china Scien

A computer simulation model of salt pan is *** transient behavior and the effects of various parameters of the salt pans,such as the depth of the brine layer,the absorptance of the soil surface,the thermal properties of the soil beneath the brine layer and the depth of the underground water table,on the evaporation process of salt pans are *** effects of extra insulation layer and the intensity of solar radiation are also examined.

关键词： salt pan solar radiation simulation

Spatial Variability of Soil Properties at capulin Volcano,New Mexico,USA:Implications for Sampling Strategy

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Pedosphere 2010年第2期20卷 185-197页

作者： d.c.WEINdORF School of Soil Plant and Environmental SciencesLouisiana State University

Non-agricultural lands are surveyed sparsely in ***,soils in these areas usually exhibit strong spatial variability which requires more samples for producing acceptable *** Volcano National Monument,as a typical sparsely-surveyed area,was chosen to assess spatial variability of a variety of soil properties,and furthermore,to investigate its implications for sampling *** hundred and forty one composited soil samples were collected across the Monument and the surrounding *** properties including pH,organic matter content,extractable elements such as calcium (ca),magnesium (Mg),potassium (K),sodium (Na),phosphorus (P),sulfur (S),zinc (Zn),and copper (cu),as well as sand,silt,and clay percentages were analyzed for each *** of all properties were constructed,standardized,and compared to estimate the spatial variability of the soil properties in the *** on the similarity among standardized semivariograms,we found that the semivariograms could be generalized for physical and chemical properties,*** generalized semivariogram for physical properties had a much greater sill value (2.635) and effective range (7 500 m) than that for chemical *** sampling density (OSd),which is derived from the generalized semivariogram and defines the relationship between sampling density and expected error percentage,was proposed to represent,interpret,and compare soil spatial variability and to provide guidance for sample scheme *** showed that chemical properties exhibit a stronger local spatial variability than soil texture parameters,implying more samples or analysis are required to achieve a similar level of precision.

关键词： generalized semivariogram GIS optimal sampling density sampling design

Assessing the Sustainability of Underground Space Usage——A Toolkit for Testing Possible Urban Futures

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Journal of Mountain Science 2011年第2期8卷 211-222页

作者： d.V.L.HUNT I.JEFFERSON c.d.F.ROGERS The University of Birmingham

A description of the future as it might be without forecasts, predictions and trend analysis can be referred to as a 'future scenario'. An abundance of scenarios literature exists in which numerous pictures have been painted of changed future worlds. However, upon closer inspection it becomes apparent that virtually all of this literature refers to changes occurring above ground, ignoring the inevitable consequences (or opportunities) for sustainable use of underground space, not least in densely populated urban areas, some of which may be underlain by complex geological conditions. This paper reports on the development (to date) of an 'Urban Futures' (UF) toolkit for sub-surface environments (including infrastructure and utilities) which, through use of 'key' questions 'sustainable' indicators and a 'contextual' narrative, allows for better definition and measured performance of underground space in the UK, both today and in the future. The toolkit explores possible uses for underground space within 4 plausible and well-cited future scenarios (i.e. New Sustainability Paradigm, Fortress World, Market Forces and Policy Reform). This forms part of a much larger generic toolkit which the UF research team are developing for exploring possible future scenarios over a range of UK urban regeneration case study areas.

关键词： urban futures toolkit underground space sustainability

Micro-scaled plastic yielding and shear-banding dynamics in metallic glasses

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Journal of Materials Science & Technology 2023年第21期152卷 237-246页

作者： d.X.Han G.Wang Q.Wang R.Feng X.d.Ma K.c.chan c.T.Liu Institute of Materials Shanghai UniversityShanghai 200444China department of Industrial and Systems Engineering The Hong Kong Polytechnic UniversityHong KongChina Neutron Scattering division Oak Ridge National LaboratoryOak RidgeTN 37831United States department of Material Science and Engineering College of Science and EngineeringCity University of Hong KongHong KongChina center for Advanced Structural Materials College of Science and EngineeringCity University of Hong KongHong KongChina

Shear-banding behavior in metallic glasses plays a key role in the operation of plastic deformation,which is associated with yield *** a micro-scale,the shear-banding behavior must be affected by many factors from the test machine and the ***,in this study,comprehensively considering a machine compliance,a geometry imperfection of micro-pillar,and a substrate sink-in the machine-sample-substrate system,we developed a plastic-strength model at a micrometer scale in this study,which is evidenced by the microscale compressive properties of 18 kinds of metallic *** the-oretical model provides a guidance for the elastic limits and shear-banding dynamics of metallic glasses at the micro-scale,which can be applicable to characterize the microscale deformation behavior of other amorphous materials.

关键词： Metallic glasses Shear-banding dynamics Micro-compression Plastic deformation