Bibliografias temáticas / Ionic transport properties correlations

Literatura científica selecionada sobre o tema "Ionic transport properties correlations"

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Publicado: 20 de julho de 2024

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Artigos de revistas sobre o assunto "Ionic transport properties correlations"

Sohn, Ahrum, e Choongho Yu. "Ionic transport properties and their empirical correlations for thermal-to-electrical energy conversion". Materials Today Physics 19 (julho de 2021): 100433. http://dx.doi.org/10.1016/j.mtphys.2021.100433.

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Lan, Tian, Francesca Soavi, Massimo Marcaccio, Pierre-Louis Brunner, Jonathan Sayago e Clara Santato. "Electrolyte-gated transistors based on phenyl-C61-butyric acid methyl ester (PCBM) films: bridging redox properties, charge carrier transport and device performance". Chemical Communications 54, n.º 43 (2018): 5490–93. http://dx.doi.org/10.1039/c8cc03090a.

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Liu, Baichuan, Nicole James, Dean Wheeler e Brian A. Mazzeo. "Effect of Calendering on Local Ionic and Electronic Transport of Porus Electrodes". ECS Meeting Abstracts MA2022-02, n.º 6 (9 de outubro de 2022): 612. http://dx.doi.org/10.1149/ma2022-026612mtgabs.

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The microstructure determines transport properties in lithium-ion battery electrodes. There is generally a tradeoff between electronic and ionic transport when adjusting the microstructure. One way of adjusting the microstructure is through calendering, where the electrode is compressed following drying. Understanding how calendering affects not only the average but also the local electronic and ionic transport provides additional insight when developing battery electrodes and engineering better batteries. If a correlation exists between the two properties, an optimal porosity that maximizes both ionic and electronic transport could be determined. In order to better understand the influence of microstructure on these transport properties, we tested a series of commercial-grade electrodes including NMC cathodes, graphite anodes, and a graphite-silicon anode. The local electronic conductivity of the electrodes was found using a micro-flexible-surface probe previously developed by our research group [1]. Likewise, the local ionic conductivity was found using an aperture probe previously developed by our research group [2]. All electrodes were obtained from Argonne National Laboratory in calendered and un-calendered states. Through testing various electrodes before and after calendering, we found that not every electrode experienced an increase in electronic conductivity after calendering, and that in general heterogeneity of the electronic conductivity decreased after calendering. The local ionic resistance, as indicated by MacMullin number, was found to increase after calendering, as expected. Figure 1 illustrates the local ionic and electronic transport results for one cathode. Ionic transport was found to be almost solely influenced by porosity. However, electronic transport was found to be influenced by a variety of factors including the nature, distribution, and connectivity of conductive materials. [1] Vogel et al., J. Electrochem. Soc. 168, 100504 (2021). [2] Liu et al., ECS Meeting Abstracts 2021, 444. Figure 1

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Gautam, Ajay, e Marnix Wagemaker. "Lithium Distribution and Site Disorder in Halide-Substituted Lithium Argyrodites: A Structural and Transport Study". ECS Meeting Abstracts MA2023-02, n.º 8 (22 de dezembro de 2023): 3325. http://dx.doi.org/10.1149/ma2023-0283325mtgabs.

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Lithium argyrodite superionic conductor has recently gained significant attention as a potential solid electrolyte for all-solid-state batteries because of its high ionic conductivity and ease of processing. One promising aspect of these materials is the ability to introduce halide (Li6-xPS5-xY1+x, Y = Cl and Br ) into the crystal structure, which can greatly impact the lithium distribution over the wide range of accessible sites and structural site-disorder between the S2₋ and Y₋ anion on Wyckoff 4d site, strongly influences the ionic conductivity. However, the relationship between halide substitution, structural site-disorder, and lithium distribution is not fully understood. In this study, we investigate the effect of halide substitution on lithium argyrodite and engineer site-disorder by changing the synthesis protocol. We reveal the lithium substructure and ionic transport correlations using neutron diffraction, solid-state NMR, and electrochemical impedance spectroscopy, We find that higher ionic conductivity is correlated with a negative charge on the 4d site, as replacing the S2− with Br− leads to a lowered average charge on the 4d site and weaker interactions within the Li+ “cage”, promoting a migration pathway for Li+ ions across the Li+ cage. We also identify a new T4 Li+ site, which enables an alternative jump route (T5–T4–T5) with a lower migration energy barrier. The resulting expansion of Li+ cages and increased connections between cages leads to a maximum ionic conductivity of 8.55 mS cm-1 with higher site-disorder, an improvement of 11-fold compared to lower site-disorder. Overall, this work provides a deeper understanding of the structure-transport correlations in lithium argyrodite, specifically how site-disorder and halide substitution impact the lithium substructure and transport properties.

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Silva, Wagner, Marcileia Zanatta, Ana Sofia Ferreira, Marta C. Corvo e Eurico J. Cabrita. "Revisiting Ionic Liquid Structure-Property Relationship: A Critical Analysis". International Journal of Molecular Sciences 21, n.º 20 (19 de outubro de 2020): 7745. http://dx.doi.org/10.3390/ijms21207745.

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In the last few years, ionic liquids (ILs) have been the focus of extensive studies concerning the relationship between structure and properties and how this impacts their application. Despite a large number of studies, several topics remain controversial or not fully answered, such as: the existence of ion pairs, the concept of free volume and the effect of water and its implications in the modulation of ILs physicochemical properties. In this paper, we present a critical review of state-of-the-art literature regarding structure–property relationship of ILs, we re-examine analytical theories on the structure–property correlations and present new perspectives based on the existing data. The interrelation between transport properties (viscosity, diffusion, conductivity) of IL structure and free volume are analysed and discussed at a molecular level. In addition, we demonstrate how the analysis of microscopic features (particularly using NMR-derived data) can be used to explain and predict macroscopic properties, reaching new perspectives on the properties and application of ILs.

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Hoffmann, Maxi, Ciprian Iacob, Gina Kaysan, Mira Simmler, Hermann Nirschl, Gisela Guthausen e Manfred Wilhelm. "Charge Transport and Glassy Dynamics in Blends Based on 1-Butyl-3-vinylbenzylimidazolium Bis(trifluoromethanesulfonyl)imide Ionic Liquid and the Corresponding Polymer". Polymers 14, n.º 12 (15 de junho de 2022): 2423. http://dx.doi.org/10.3390/polym14122423.

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Charge transport, diffusion properties, and glassy dynamics of blends of imidazolium-based ionic liquid (IL) and the corresponding polymer (polyIL) were examined by Pulsed-Field-Gradient Nuclear Magnetic Resonance (PFG-NMR) and rheology coupled with broadband dielectric spectroscopy (rheo-BDS). We found that the mechanical storage modulus (G′) increases with an increasing amount of polyIL and G′ is a factor of 10,000 higher for the polyIL compared to the monomer (GIL′= 7.5 Pa at 100 rad s−1 and 298 K). Furthermore, the ionic conductivity (σ0) of the IL is a factor 1000 higher than its value for the polymerized monomer with 3.4×10−4 S cm−1 at 298 K. Additionally, we found the Haven Ratio (HR) obtained through PFG-NMR and BDS measurements to be constant around a value of 1.4 for the IL and blends with 30 wt% and 70 wt% polyIL. These results show that blending of the components does not have a strong impact on the charge transport compared to the charge transport in the pure IL at room temperature, but blending results in substantial modifications of the mechanical properties. Furthermore, it is highlighted that the increase in σ0 might be attributed to the addition of a more mobile phase, which also possibly reduces ion-ion correlations in the polyIL.

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Westover, Andrew S., Farhan Nur Shabab, John W. Tian, Shivaprem Bernath, Landon Oakes, William R. Erwin, Rachel Carter, Rizia Bardhan e Cary L. Pint. "Stretching Ion Conducting Polymer Electrolytes: In-Situ Correlation of Mechanical, Ionic Transport, and Optical Properties". Journal of The Electrochemical Society 161, n.º 6 (2014): E112—E117. http://dx.doi.org/10.1149/2.035406jes.

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Zhang, Yong, e Edward J. Maginn. "Direct Correlation between Ionic Liquid Transport Properties and Ion Pair Lifetimes: A Molecular Dynamics Study". Journal of Physical Chemistry Letters 6, n.º 4 (5 de fevereiro de 2015): 700–705. http://dx.doi.org/10.1021/acs.jpclett.5b00003.

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Mohamed, Hamdy F. M., Esam E. Abdel-Hady e Wael M. Mohammed. "Investigation of Transport Mechanism and Nanostructure of Nylon-6,6/PVA Blend Polymers". Polymers 15, n.º 1 (27 de dezembro de 2022): 107. http://dx.doi.org/10.3390/polym15010107.

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A casting technique was used to prepare poly(vinyl alcohol) (PVA) blend polymers with different concentrations of Nylon-6,6 to increase the free-volume size and control the ionic conductivity of the blended polymers. The thermal activation energy for some blends is lower than that of pure polymers, indicating that their thermal stability is somewhere in between that of pure Nylon-6,6 and pure PVA. The degree of crystallinity of the blend sample (25.7%) was lower than that of the pure components (41.0 and 31.6% for pure Nylon-6,6 and PVA, respectively). The dielectric properties of the blended samples were investigated for different frequencies (50 Hz–5 MHz). The σac versus frequency was found to obey Jonscher’s universal power law. The calculated values of the s parameter were increased from 0.53 to 0.783 for 0 and 100 wt.% Nylon-6,6, respectively, and values less than 1 indicate the hopping conduction mechanism. The barrier height (Wm) was found to increase from 0.33 to 0.72 for 0 and 100 wt.% Nylon-6,6, respectively. The ionic conductivity decreases as the concentration of Nylon-6,6 is blended into PVA because increasing the Nylon-6,6 concentration reduces the number of mobile charge carriers. Positron annihilation lifetime (PAL) spectroscopy was used to investigate the free volume’s nanostructure. The hole volume size grows exponentially with the concentration of Nylon-6,6 mixed with PVA. The Nylon-6,6/PVA blends’ free-volume distribution indicates that there is no phase separation in the blended samples. Mixing PVA and Nylon-6,6 resulted in a negative deviation (miscible blends), as evidenced by the interaction parameter’s negative value. The strong correlation between the free-volume size and other macroscopic properties like ionic conductivity suggests that the free-volume size influences these macroscopic properties.

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OSUCHOWSKI, MARCIN, e JANUSZ PŁOCHARSKI. "ELECTRORHEOLOGICAL EFFECT IN SUSPENSIONS OF AgI/Ag2O/V2O5/P2O5 GLASSES". International Journal of Modern Physics B 16, n.º 17n18 (20 de julho de 2002): 2378–84. http://dx.doi.org/10.1142/s0217979202012396.

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The ER effect results from bulk and surface electric polarization processes in solid grains of ER suspensions but detailed mechanisms are not very clear. The aim of the present study was to find correlations between the character of bulk charge transport processes (electronic and/or ionic) in particles of a dispersion and parameters of the ER effect. As the dispersed phase we used glasses comprising oxides of silver, vanadium and phosphorus with addition of silver iodide. Bulk electric properties of this material could be modified without changing other properties influencing the ER effect like porosity, shape of grains, hardness, affinity to a liquid matrix etc. Variations of concentration of the components result in changes of ionic and electronic conductivity whilst other properties remain constant. The suspensions of the powdered glasses showed relatively high ER effect. The dynamic yield stress figured from 35 to 160 Pa at 2.0kV/mm for 12% concentration by volume. The highest values were observed for ionically conducting samples. The values of relaxation frequencies ( f R ) based on bulk properties of the glass sample were calculated and correlated with the yield stress whose maximum was obtained for samples of f R close to 100 kHz. High ER effect was observed also for samples of f R in the MHz range but in this case different polarization mechanism was postulated. The influence of polarization mechanisms on rheological behavior of the prepared fluids was discussed.

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Teses / dissertações sobre o assunto "Ionic transport properties correlations"

Pung, Hélène. "Cristaux liquides ioniques thermotropes : Relations structure/propriétés de transport ionique". Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALV007.

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Développer des études multi-échelles spatiales (nano/méso/micro-macroscopiques) et temporelles est crucial pour comprendre, maîtriser et piloter les relations liant la structure aux propriétés de transport ionique de matériaux fonctionnels hiérarchiquement auto-assemblés. C’est selon ces lignes de force que ce travail exploratoire se positionne pour relever les défis scientifiques associés. Il vise notamment à rassembler des éléments de compréhension pour générer de familles d'électrolytes à conduction (cat/an)ionique ajustables de par leur conception et pouvant être mises en œuvre par des processus robustes d'élaboration qui autoriseront leur intégration dans des dispositifs de conversion et stockage électrochimique de l’énergie plus efficaces. Les familles modèles de la matière molle (fonctionnelle) électrolytique choisies sont les Cristaux Liquides Ioniques Thermotropes (CLITs) qui combinent synergétiquement l’autoassemblage hiérarchique dynamique à travers différentes échelles à des facultés d’autoréparation pour encoder un transport ionique de dimensionnalité (quasi-1D/quasi-2D/3D) contrôlée. L’ingénierie moléculaire, la synthèse et l’étude de familles modèles de ces conducteurs (an/cat)ioniques (A/C)-CLITs stimuli-sensibles sont ainsi présentés et discutés dans ce travail de recherche.L’étude de l’organisation supramoléculaire d’une famille modèle de C-CLITs conducteurs des cations K+ et Na+ décrit i) une mésophase Cubique bicontinue (Cubbi) à symétrie Ia3d monotrope (c’est-à-dire qui se développe seulement lors de la première montée en température) et ii) une mésophase Colonnaire hexagonale (Colhex), sièges respectifs de processus de transport 3D et quasi-1D. Les parties ioniques polaires constituent le cœur des colonnes et les chaînes aliphatiques la périphérie de celles-ci. L’étude expérimentale et la modélisation du confinement des porteurs de charges au sein d’une famille modèle d’A-CLITs C18C18Im+/X- (X- = Br-, I-, N(CN)2-), formant des mésophases Smectiques A interdigitées (SmAd sièges d’un transport ionique anisotrope quasi-2D), révèlent un régime de nanoconfinement des anions soumis à des interactions électrostatiques au sein des sous-couches polaires (épaisseur de ca. 1 nm) de leur organisation lamellaire. L’étude de ces CLITs aborde ainsi l’impact fonctionnel de la mosaïcité, c’est-à-dire de la coexistence de domaines mésomorphes présentant des orientations et tailles différentes sur le transport ionique.Une première description expérimentale directe a permis de décrire le rôle de cette mosaïcité dynamique à la fois i) sur l’organisation à longue distance de domaines mésomorphes et ii) sur le transport ionique à l’échelle méso-/macro-scopique. Au sein des mésophases formées par le C-CLIT conducteur du cation K+, la mésophase Cubbi présente des valeurs de conductivité deux ordres de grandeur plus importantes que celles liées à la mésophase Colhex. La mésophase Cubbi ne nécessitant pas de stratégies spécifiques de gestion des défauts (faible densité de défauts/d’interfaces homophasiques), les sous-domaines polaires peuvent y percoler efficacement selon un mécanisme intrinsèquement 3D. L’ordre à longue distance des domaines dynamiques mésomorphes SmAd de l’A-CLIT C18C18Im+/N(CN)2-, induit par l’application d’un stimulus externe (un champ magnétique de 1 T), se traduit par une augmentation de ca. 1.6x la taille moyenne des domaines mésomorphes (de 92 à 145 nm) à 80°C. Du fait de la réduction du désordre et du nombre d’interfaces homophasiques (pouvant pénaliser le transport des anions), une augmentation naturelle (attendue) des valeurs de conductivités d’un facteur ca. x2.6 (9 à 25 µS·cm-1) est observée.In fine, les CLITs, matériaux électrolytiques 2.0 encodant propriétés de transport ionique et faculté (bio-inspirée) d’auto-assemblage/réparation dynamique, se positionnent comme une classe originale de matériaux fonctionnels stimuli-sensibles pour le stockage et la conversion électrochimique de l’énergie
Developing multi-scale spatial (nano/meso/micro-macroscopic) and temporal studies is crucial to understand, control, and pilot the relationships linking the structure to the ionic transport properties of hierarchically self-assembled functional materials. It is along these research lines that this exploratory work is positioned to meet their associated scientific challenges. It aims in particular to bring together elements of understanding for designing families of electrolytes with tuneable-by-design (cat/an)ionic conductivity levels and that can be implemented by reliable manufacturing processes to authorize their scalable integration into more efficient electrochemical energy conversion and storage devices. The scrutinized model families of soft-matter electrolytes are Thermotropic Ionic Liquid Crystals (TILCs), which synergistically combine dynamic hierarchical self-assembly with self-healing functionalities to encode dimensionality (quasi-1D/ quasi-2D/3D) controlled ionic transport. This research work presents and discusses the molecular engineering, syntheses and detailed studies of these model stimuli-responsive (An/Cat)ionic (A/C)-TILCs conductors.The study of the supramolecular organization of a model family of K+ and Na+ cation-conducting C-TILCs has unravelled i) a monotropic (i.e. which develops only during of the first heating scan) bicontinuous Cubic mesophase (Cubbi) with an Ia3d symmetry and ii) a hexagonal Columnar mesophase (Colhex), encoding 3D and quasi-1D transport processes, respectively. Polar ionic sub-domains are localized at the heart of the columns decorated at their periphery by aliphatic chains. The experimental study and modelling of the confinement of charge carriers within a model family of C18C18Im+/X- (X= Br-, I-, N(CN)2-) A-TILCs forming interdigitated Smectic A mesophases (SmAd are hosting quasi-2D anisotropic ionic transport) reveals a regime of nanoconfinement of anions subjected to electrostatic interactions within the ca. 1 nm-"thick" polar sub-layers within their lamellar organizations. The study of these TILCs thus addresses the functional impact of mosaicity, i.e. how the coexistence of mesomorphic domains presenting different orientations and sizes is impacting ionic transport.A first direct experimental description allows to describe the role of this dynamic mosaicity both i) on the long-range organization of mesomorphic domains and ii) onto ion transport at the meso-/macro-scopic scale. Within mesophases formed by the K+-cation conducting C-TILC, the Cubbi mesophase presents conductivity values two orders of magnitude greater than those associated to the Colhex mesophase. As the Cubbi mesophase does not require specific defect management strategies (low density of defects/homophasic interfaces), it turns out that polar subdomains can thus percolate efficiently according to an intrinsically 3D mechanism. In contrast, the long-range ordering of the (dynamic) SmAd mesomorphic domains of the C18C18Im+/N(CN)2- A-TILC, induced by the application of an external stimulus (here, a magnetic field of 1 T), results in a ca. x1.6 increase (from 92 to 145 nm) of the average size of mesomorphic domains at 80°C. Due to the reduction of the disorder and of the number of homophasic interfaces (which can penalize the transport of anions), a natural (expected) increase in conductivity values by a factor ca. x2.6 (9 to 25 µS·cm-1) is observed.Ultimately, TILCs, i.e. 2.0 electrolytic materials encoding ionic transport properties and (bioinspired) dynamic self-assembly/repairing functionalities, are consisting in an original class of stimuli-sensitive functional materials for the electrochemical conversion and storage of energy

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Jain, P. "Ionic liquids: hydrophobicity, enthalpic effects accompanying ionic interactions and their transport properties". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2017. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/4353.

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O'Callaghan, Michael Patrick. "Structure and ionic transport properties of lithium-conducting garnets". Thesis, University of Nottingham, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493341.

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This thesis describes the synthesis and characterisation of three related series of lithium-containing garnets. All compounds have been synthesised by conventional solid-state ceramic methods at temperatures up to 960 Â°C.

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Koronaios, Peter. "Studies of transport and thermodynamic properties of ionic liquids". Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243047.

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Hu, Zhonghan. "Transport properties, optical response and slow dynamics of ionic liquids". Diss., University of Iowa, 2007. http://ir.uiowa.edu/etd/160.

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Al-Zubaidi, Hussein A. "The transport properties of cation exchange membranes in bi-ionic forms". Thesis, University of Glasgow, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236019.

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Liu, Jingjing. "Mass transport and electrochemical properties of La2Mo2O9 as a fast ionic conductor". Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/5566.

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La2Mo2O9, as a new fast ionic conductor, has been investigated widely due to its high ionic conductivity which is comparable to those of the commercialized materials. However, little work has been reported on the oxygen transport and diffusion in this candidate electrolyte material. The main purpose of this project was to investigate oxide ion diffusion in La2Mo2O9 and also the factors which could affect oxygen transport properties. Oxygen isotope exchange followed by Secondary Ion Mass Spectrometry (SIMS) measurements were employed to obtain oxygen diffusion profiles. A correlation between oxygen ion transport and the electrochemical properties such as ionic conductivity was built upon the Nernst Einstein equation relating the diffusivity to electrical conductivity. In-situ neutron diffraction and AC impedance measurements were designed and conducted to investigate the correlation between crystal structure and oxygen transport in the bulk materials. Other techniques, such as synthesis, microstructure studies, and thermal analysis were also adopted to study the electrochemical properties of La2Mo2O9. The results of the study on the effects of microstructure on oxygen diffusion in La2Mo2O9 revealed that the grain boundary component played a significant role in electrochemical performance, although the grain size seemed to have little influence on oxygen transport. The oxygen isotope exchange in 18O2 was successfully carried out by introducing a silver coating on the sample surface, which solved the main difficulty in applying oxygen isotope exchange on pure ionic conductors. The ionic conductivity obtained from the diffusion coefficients was consistent with the result from AC impedance spectroscopy. The number of mobile oxygen ions was estimated to be 5 per unit cell. There was a difference of oxygen self diffusion coefficient when the isotope exchange was conducted in 18O2 and H2 18O. The activation energy of oxygen diffusion in humidified atmosphere was higher than that measured in dry atmosphere. It indicated that the humidified atmosphere had affected oxygen transport in the material. The studies on hydroxyl incorporation and transport explained the decreased oxygen diffusion coefficients in wet atmosphere and also suggested proton conductivity in La2Mo2O9, which leads to further investigation on applications of La2Mo2O9 as a proton conductor. In-situ neutron diffraction and AC impedance measurement revealed a close relationship between crystal structure and ionic conductivity. The successful application of this technique provides a new method to simultaneously investigate crystal structure and electrical properties in electro-ceramics in the future.

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Lankhorst, Martijn Henri Richard. "Thermodynamic and transport properties of mixed ionic-electronic conducting perovskite-type oxides /". Online version, 1997. http://bibpurl.oclc.org/web/21054.

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Badarayani, R. D. "Effect of ionic solutes on amino acids and peptides from thermodynamic, volumetric and transport studies: experiments and correlations". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2003. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2887.

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Jaweesh, Mahmoud. "Correlations between fluviatile sandstone lithofacies and geochemical properties and their importance for groundwater contaminant transport". Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8170/.

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Reactive groundwater contaminant transport is dependent upon hydraulic and geochemical property distributions. The aim of this research was to determine, for an example fluvial sandstone: (i) the degree of correlation between geochemical property values and lithofacies (LFs); and (ii) the effect of the correlations on reactive solute transport. A 60 m core from the carbonate-cemented, red-bed Triassic Sherwood Sandstone Group was examined. Five fluvial LFs were identified, in fining upwards cycles from a channel lag sandstone (LF5) to a low energy mudstone (LF1). The main geochemical properties investigated were carbonate content, oxide content, sorption capacity, cation exchange capacity (CEC) and selectivity coefficient; Surface area and colour were also studied. There is a clear distinction in carbonate content, CEC, selectivity coefficient and Fe and Mn oxide content between LF1 and LF2, the ‘mud’ LFs, and the matrix of LF3, LF4 and LF5, the ‘sand’ LFs. In addition, the pellets change the bulk geochemical properties of the sand LF units. Modelling indicated that the pellets can affect solute mobility significantly. Selectivity coefficients show a possible depth zoning. Distribution parameter values obtained characterize the sequence for geochemical modelling and uncertainty estimation. Oxide coating thickness was estimated at about 100nm. CEC was found to be well-correlated with surface area. Colour/Fe/Mn content correlations suggest a possibility in future to use colour logging to indicate oxide content and possibly even surface area and CEC. As the sequence examined appears typical of many red-bed fluvial sequences, it is suggested that the findings may also be typical of other similar continental sandstones.

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Mais fontes

Livros sobre o assunto "Ionic transport properties correlations"

Mason, Edward A. Transport properties of ions in gases. New York: Wiley, 1988.

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Adriatico Research Conference on "Electron and Ion Transfer in Condensed Media"k1996 (Trieste, Italy). Proceedings of the Conference Electron and Ion Transfer in Condensed Media: Theoretical Physics for Reaction Kinetics, ICTP, Trieste, Italy, 15-19 July 1996. Editado por Kornyshev A. A, Tosi M. P. 1932- e Ulstrup Jens. Singapore: World Scientific, 1997.

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Dubin, Dale. Ion Adventure in the Heartland: Exploring the Heart's Ionic-Molecular Microcosm. Cover Publishing Company, 2003.

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(Editor), A. A. Kornyshev, M. P. Tosi (Editor) e J. Ulstrup (Editor), eds. Electron and Ion Transfer in Condensed Media: Theoretical Physics for Reaction Kinetics : Proceedings of the Conference Ictp, Trieste, Italy 15-19 July 1996. World Scientific Pub Co Inc, 1997.

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Morawetz, Klaus. Relativistic Transport. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198797241.003.0022.

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The quantum kinetic equations for relativistic baryon-meson systems are derived from Kadanoff and Baym equations. It is shown that the virtual exchange of mesons create an effective Yukawa potential between the nucleons. Binding properties of nuclear matter are discussed and the problem of Coester line is explored which means that only three-particle correlations or relativistic effective masses can describe the binding of nuclear matter correctly. The derived kinetic equations show in-medium processes of scattering and particle creation and destruction which are forbidden for free-scattering. The corresponding in-medium cross sections are presented.

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Spiers, C. J., C. J. Peach, A. J. Tankink e H. J. Zwart. Fluid and Ionic Transport Properties of Deformed Salt Rock, 01/10/84-30/06/85 (Nuclear Science and Technology (European Comm Info Serv)). European Communities, 1987.

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Morawetz, Klaus. Interacting Systems far from Equilibrium. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198797241.001.0001.

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In quantum statistics based on many-body Green’s functions, the effective medium is represented by the selfenergy. This book aims to discuss the selfenergy from this point of view. The knowledge of the exact selfenergy is equivalent to the knowledge of the exact correlation function from which one can evaluate any single-particle observable. Complete interpretations of the selfenergy are as rich as the properties of the many-body systems. It will be shown that classical features are helpful to understand the selfenergy, but in many cases we have to include additional aspects describing the internal dynamics of the interaction. The inductive presentation introduces the concept of Ludwig Boltzmann to describe correlations by the scattering of many particles from elementary principles up to refined approximations of many-body quantum systems. The ultimate goal is to contribute to the understanding of the time-dependent formation of correlations. Within this book an up-to-date most simple formalism of nonequilibrium Green’s functions is presented to cover different applications ranging from solid state physics (impurity scattering, semiconductor, superconductivity, Bose–Einstein condensation, spin-orbit coupled systems), plasma physics (screening, transport in magnetic fields), cold atoms in optical lattices up to nuclear reactions (heavy-ion collisions). Both possibilities are provided, to learn the quantum kinetic theory in terms of Green’s functions from the basics using experiences with phenomena, and experienced researchers can find a framework to develop and to apply the quantum many-body theory straight to versatile phenomena.

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Tiwari, Sandip. Phase transitions and their devices. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198759874.003.0004.

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Phase transitions as a collective response of an ensemble, with appearance of unique stable properties spontaneously, is critical to a variety of devices: electronic, magnetic, optical, and their coupled forms. This chapter starts with a discussion of broken symmetry and its manifestation in the property changes in thermodynamic phase transition and the Landau mean-field articulation. It then follows it with an exploration of different phenomena and their use in devices. The first is ferroelectricity—spontaneous electric polarization—and its use in ferroelectric memories. Electron correlation effects are explored, and then conductivity transition from electron-electron and electron-phonon coupling and its use in novel memory and device forms. This is followed by development of an understanding of spin correlations and interactions and magnetism—spontaneous magnetic polarization. The use and manipulation of the magnetic phase transition in disk drives, magnetic and spin-torque memory as well as their stability is explored. Finally, as a fourth example, amorphous-crystalline structural transition in optical, electronic, and optoelectronic form are analyzed. This latter’s application include disk drives and resistive memories in the form of phase-change as well as those with electochemical transport.

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Capítulos de livros sobre o assunto "Ionic transport properties correlations"

Kurilenkov, Yu K., e M. A. Berkovsky. "Collective Modes and Correlations". In Transport and Optical Properties of Nonideal Plasma, 215–91. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1066-0_6.

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Bezanilla, Francisco, e Michael M. White. "Properties of Ionic Channels in Excitable Membranes". In Membrane Transport Processes in Organized Systems, 53–64. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4684-5404-8_4.

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Zhang, Suojiang, Qing Zhou, Xingmei Lu, Yuting Song e Xinxin Wang. "Volumetric and transport properties of imidazolium chloride mixtures". In Physicochemical Properties of Ionic Liquid Mixtures, 54–55. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-7573-1_2.

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Zhang, Suojiang, Qing Zhou, Xingmei Lu, Yuting Song e Xinxin Wang. "Transport properties of tetra(n-butyl)phosphonium alaninate mixtures". In Physicochemical Properties of Ionic Liquid Mixtures, 1272–73. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-7573-1_175.

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Zhang, Suojiang, Qing Zhou, Xingmei Lu, Yuting Song e Xinxin Wang. "Volumetric and transport properties of 1-methylimidazolium chloride mixtures". In Physicochemical Properties of Ionic Liquid Mixtures, 56–57. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-7573-1_3.

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Zhang, Suojiang, Qing Zhou, Xingmei Lu, Yuting Song e Xinxin Wang. "Volumetric and transport properties of n-butyl pyridinium tetrafluoroborate mixtures". In Physicochemical Properties of Ionic Liquid Mixtures, 1054–57. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-7573-1_114.

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Zhang, Suojiang, Qing Zhou, Xingmei Lu, Yuting Song e Xinxin Wang. "Volumetric and transport properties of 1-octyl pyridinium tetrafluoroborate mixtures". In Physicochemical Properties of Ionic Liquid Mixtures, 1058–60. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-7573-1_115.

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Zhang, Suojiang, Qing Zhou, Xingmei Lu, Yuting Song e Xinxin Wang. "Volumetric and transport properties of 1-propyl-2,3-dimethylimidazolium tetrafluoroborate mixtures". In Physicochemical Properties of Ionic Liquid Mixtures, 1000–1002. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-7573-1_100.

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Zhang, Suojiang, Qing Zhou, Xingmei Lu, Yuting Song e Xinxin Wang. "Volumetric and transport properties of 1-ethyl-3-methylimidazolium diethyleneglycolmonomethylethersulphate mixtures". In Physicochemical Properties of Ionic Liquid Mixtures, 305–9. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-7573-1_17.

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Salje, E. K. H. "Fast Ionic Transport Along Twin Walls in Ferroelastic Minerals". In Properties of Complex Inorganic Solids 2, 3–15. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-1205-9_1.

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Trabalhos de conferências sobre o assunto "Ionic transport properties correlations"

Li, Zhidong, Edward Wanat, Lisa Lun, Jordan Hoyt, Andrew Heider, Alana Leahy-Dios e Robert Wattenbarger. "Fluid Property Model for Carbon Capture and Storage by Volume-Translated Peng-Robinson Equation of State and Lohrenz-Bray-Clark Viscosity Correlation". In SPE Reservoir Characterisation and Simulation Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/212584-ms.

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Abstract We establish a fluid property model for carbon capture and storage (CCS) within the unified framework of classical compositional reservoir simulation by employing the standard volume-translated Peng-Robinson (PR-VT) Equation of State (EOS) and Lohrenz-Bray-Clark (LBC) viscosity correlation. We spend tremendous effort on the collection of high-quality data and our model demonstrates excellent numerical accuracy because each parameter is well defined through the extensive calibration with data from experiments, National Institute of Standards and Technology (NIST) and reliable correlations. We successfully address all the questions that could be encountered in the prediction of phase behavior and physical and transport properties of CCS fluid systems: the multiple components of injection gas, the gas solubility in aqueous phase and water (no salts) solubility in non-aqueous phase, the density and viscosity of aqueous phase with dissolved gas and of non-aqueous phase with dissolved water, and the impact of different ionic species on gas solubility, density and viscosity of aqueous phase. Moreover, we propose a modified procedure to perform the multi-component multi-phase equilibrium computation that implements our model and overcomes the challenge due to thermodynamic inconsistency caused by phase-dependent parameters. Since CO2/brine system has zero degree of freedom at fixed temperature and pressure in two-phase state, we are able to create the ‘exact’ black oil table by applying the phase equilibrium computation integrated with our model. It is of particular significance because the corresponding black oil simulation for CO2 injection in saline aquifer could be performed on any commercial reservoir simulator in large scale to satisfy most of the requirements of CCS studies.

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Di´az, Rube´n, e Boris Rubinsky. "A Single Cell Study on the Temperature Effects of Electroporation". In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61151.

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In electroporation, the charging of the cell membrane due to an applied electric field is followed by a localized structural rearrangement of the membrane, which consequently creates pores or aqueous pathways that perforate the membrane. A tremendous increase in ionic and molecular transport through the membrane occurs because of the presence of these aqueous pores. As part of a comprehensive study on the effects of temperature on electroporation of cells, we have designed a micro device capable of integrating single cells into an electronic circuit while controlling the temperature. In the present work, we have studied the effect of temperature on the electroporation of Madin-Darby canine kidney epithelial cells (MDCK) with a micro-electroporation device. It was found that the critical voltage for electropermeabilization was strongly dependent on temperature, increasing by a factor of 2 with decreasing temperature from 37 to 5 °C. Data shows there is a correlation among the viscoelastic properties of the cell membrane and the temperature.

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Sandeep, K. "Ionic transport properties of Mg2Ti2Zr5O16 functional material". In PROCEEDINGS OF ADVANCED MATERIAL, ENGINEERING & TECHNOLOGY. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0019414.

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Kawamura, Junichi, Naoaki Kuwata, Takanari Tanji, Michio Tokuyama, Irwin Oppenheim e Hideya Nishiyama. "Heterogeneous Structure and Ionic Transport Properties of Silver Chalcogenide Glasses". In COMPLEX SYSTEMS: 5th International Workshop on Complex Systems. AIP, 2008. http://dx.doi.org/10.1063/1.2897768.

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Schwartz, Kenneth B. "Electrical Transport Properties In Garnets: Correlations With Point Defect Models". In 30th Annual Technical Symposium, editado por Larry G. DeShazer. SPIE, 1987. http://dx.doi.org/10.1117/12.939626.

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Biziere, N., e C. Fermon. "Correlations between dynamic and transport properties in a single spin valve sensor". In INTERMAG 2006 - IEEE International Magnetics Conference. IEEE, 2006. http://dx.doi.org/10.1109/intmag.2006.376155.

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Sulaimon, Aliyu Adebayo, Luqman Adam Azman, Syed Ali Qasim Zohair, Bamikole Joshua Adeyemi, Azmi B. Shariff e Wan Zaireen Nisa Yahya. "Predicting the Hydrogen Storage Potential of Ionic Liquids Using the Data Analytics Techniques". In SPE Nigeria Annual International Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/217176-ms.

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Abstract In recent years, hydrogen has been an attractive substitute as an energy carrier to fossil fuels, though it is difficult to store by conventional means. Ionic Liquids (ILs) are low-melting salts with varying properties of interest. Experimental investigations into the utilization of ILs as hydrogen storage mediums are still ongoing. This study aimed to predict the solubility of hydrogen in ILs using the data analytics method, whereby the correlations between the ILs’ requisite hydrogen properties and hydrogen solubility were developed and validated. The methodology involves comparing the experimental data from the literature and the simulated data from COSMO-RS software, where predictive correlations were developed using analytical software such as Python. The predictive model can be used to predict the hydrogen solubility of ILs based on the input inherent thermophysical properties of the IL before a particular IL is synthesized and tested in an actual laboratory setting.

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Paneri, Abhilash, e Saeed Moghaddam. "Influence of Synthesis Conditions on the Transport Properties of Graphene Oxide Laminates". In ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/icnmm2015-48222.

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In this study, the effect of oxidation conditions during the synthesis process of graphene oxide (GO) flakes on the transport characteristics of its laminates is investigated. Transport properties of the GO laminates synthesized by different oxidation methods are characterized by determining their ionic conductivity (via proton conductivity) and mass diffusion of species (via methanol permeability). These properties are observed to be considerably different for each sample owing to the difference in their physicochemical properties. It is determined that for GO synthesized under a more aggressive environment, proliferation of surface defects plays a dominant role in determining mass transport across GO laminate. A parametric study is conducted to systematically understand the impact of changing oxidation level on transport properties of GO laminate.

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Daiguji, Hirofumi, Daisuke Nakayama, Asuka Takahashi, Sho Kataoka e Akira Endo. "Ion Transport in Mesoporous Silica Thin Films". In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44526.

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Mesoporous silica SBA-16 thin films were synthesized on a Si substrate via the dip-coating method. SEM analysis revealed that these films possess highly ordered 3D cubic structure. After these films were filled with either pure water or KCl aqueous solutions, the ionic current passing through the mesopores was measured by applying electric field to find out ion transport phenomena. If the ion transport phenomena in mesoporous silica are completely elucidated, this will enhance its use in applications where it is intended to be employed as a catalyst, filter, and adsorbent. The measured I-V curves were non-linear. This document discusses the relationship between the non-linear I-V curves and the ionic flow inside the 3D cubic pore structure. The effect of the dimensions and surface properties of mesopores on the I-V curves are also discussed.

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Shqau, Krenar, e Amy Heintz. "Mixed Ionic Electronic Conductors for Improved Charge Transport in Electrotherapeutic Devices". In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3454.

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Electrotherapeutic devices require an electrode for coupling with the body. The most common electrodes are made of conducting corrosion resistance materials (e.g., TiN, Ir-IrO2, Pt) plus a coupling layer (e.g., electrolyte). The electrode is the location where redox reaction take place between the device and the tissue. As such, it must conduct both electrons and ions. The reactions can be capacitive, involving the charging and discharging of the electrode-electrolyte double layer, or faradaic. Capacitive charge-injection is more desirable than faradic charge-injection because no chemical species are created or consumed during a stimulation pulse. Most noble metal based electrodes are faradic or pseudo-capacitive, which can lead to performance changes over time. In addition, under the high rate of charge injection and high current density conditions of a neuromuscular stimulation pulse, access to all the accessible charges is limited by the interfacial resistance and low surface area at the electrode [1]. A particularly critical point is the passage of current between the surface of the skin and the electrical contact connected by wire to the device, which requires a low stable resistance that does not vary with time, humidity [2]. We have developed new hybrid mixed-ionic-electronic conductors (MIECs) that have the potential to overcome these deficiencies. The MIECs are an interconnected network of electrical and ionic conductors in an elastomeric matrix that provide: (1) high surface area for efficient capacitive charge-discharge; (2) high ionic conductivity for low interfacial resistance; (3) low ohmic resistance; and (4) excellent flexibility and toughness. Carbon nanotubes (CNTs) are the electrical conductors in the MIEC and hyaluronic acid (HA), along with moisture and ions, is the ionic conductor. Unlike the current state-of-the-art, conducting noble metals, this system exhibits good mechanical properties, high conductivity (up to 3000 mS/cm), high moisture retention (up to 100wt%) and high ion mobility, leading to facile electrode kinetics. This simple yet efficient system is promising for the fabrication of a variety of high performance flexible electrodes.

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Relatórios de organizações sobre o assunto "Ionic transport properties correlations"

Jury, William A., e David Russo. Characterization of Field-Scale Solute Transport in Spatially Variable Unsaturated Field Soils. United States Department of Agriculture, janeiro de 1994. http://dx.doi.org/10.32747/1994.7568772.bard.

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This report describes activity conducted in several lines of research associated with field-scale water and solute processes. A major effort was put forth developing a stochastic continuum analysis for an important class of problems involving flow of reactive and non reactive chemicals under steady unsaturated flow. The field-scale velocity covariance tensor has been derived from local soil properties and their variability, producing a large-scale description of the medium that embodies all of the local variability in a statistical sense. Special cases of anisotropic medium properties not aligned along the flow direction of spatially variable solute sorption were analysed in detail, revealing a dependence of solute spreading on subtle features of the variability of the medium, such as cross-correlations between sorption and conductivity. A novel method was developed and tested for measuring hydraulic conductivity at the scale of observation through the interpretation of a solute transport outflow curve as a stochastic-convective process. This undertaking provided a host of new K(q) relationships for existing solute experiments and also laid the foundation for future work developing a self-consistent description of flow and transport under these conditions. Numerical codes were developed for calculating K(q) functions for a variety of solute pulse outflow shapes, including lognormal, Fickian, Mobile-Immobile water, and bimodal. Testing of this new approach against conventional methodology was mixed, and agreed most closely when the assumptions of the new method were met. We conclude that this procedure offers a valuable alternative to conventional methods of measuring K(q), particularly when the application of the method is at a scale (e.g. and agricultural field) that is large compared to the common scale at which conventional K(q) devices operate. The same problem was approached from a numerical perspective, by studying the feasibility of inverting a solute outflow signal to yield the hydraulic parameters of the medium that housed the experiment. We found that the inverse problem was solvable under certain conditions, depending on the amount of noise in the signal and the degree of heterogeneity in the medium. A realistic three dimensional model of transient water and solute movement in a heterogeneous medium that contains plant roots was developed and tested. The approach taken was to generate a single realization of this complex flow event, and examine the results to see whether features were present that might be overlooked in less sophisticated model efforts. One such feature revealed is transverse dispersion, which is a critically important component in the development of macrodispersion in the longitudinal direction. The lateral mixing that was observed greatly exceeded that predicted from simpler approaches, suggesting that at least part of the important physics of the mixing process is embedded in the complexity of three dimensional flow. Another important finding was the observation that variability can produce a pseudo-kinetic behavior for solute adsorption, even when the local models used are equilibrium.

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