Relevant bibliographies by topics / Permeabilitas / Dissertations / Theses
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Dissertations / Theses on the topic 'Permeabilitas'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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1

Colace, Gianmarco. "Modification of Poly(vinyl alcohol) film to maximize barrier properties." Doctoral thesis, Universitat Rovira i Virgili, 2019. http://hdl.handle.net/10803/668477.

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L'alcohol polivinílic (PVA) és el polímer sintètic mes produït al món. L'excel·lent resistència química i propietats físiques de la resina del PVA han generat un ampli ús a nivell industrial. Els films d'alcohol polivinílic exhibeixen alta resistència a la tensió, resistència a l'abrasió i propietats barrera a l'oxígen, que sota en absencia d`humitat són molt superiors a la majoria d'altres polímers. Els films de PVA són àmpliament utilitzats en aplicacions d'embalatge, on la permeabilitat arriba a ser una propietat crítica a mesurar. Una àmplia sèrie de modificacions poden ser aplicades per
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2

Mach, Batlle Rosa. "Controlling static magnetic fields with positive and negative permeability metamaterials." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/669857.

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Magnetism is present in our daily life – it is found at the basis of technologies such as electric generators and transformers, data storage systems, sensors, and biomedical equipment – and it is usually controlled by ferromagnetic materials. Recently, the introduction of magnetic metamaterials and the transformation optics technique has enabled the development of a wide range of devices for controlling magnetic fields, offering possibilities beyond those of conventional magnetic materials. In this thesis, we apply these concepts to propose different strategies for controlling static magnetic
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3

Orrego, Lagarón Naiara. "Estudios de absorción y disposición de naringenina y quercetina. Estudios preclínicos." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/396654.

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En los últimos años se ha visto un creciente interés en el estudio de los compuestos bioactivos que se encuentran en frutas y hortalizas debido a la relación “Dieta mediterránea vs. Salud”, con el fin de conocer cuáles de ellos son los responsables de dicha relación. La presente tesis doctoral se enmarca en este contexto y en concreto en el estudio de una de las hortalizas más consumidas en Europa, el tomate. El tomate es conocido por contener grandes cantidades de polifenoles entre ellos destacan dos flavonoides, naringenina y quercetina. Ambos son conocidos como posibles responsables de s
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4

Alegre, Calcina Gian Carlo Jorge. "Centro de Desarrollo Comunitario en Comas." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/652366.

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El presente trabajo tiene como base la investigación de los criterios y pautas que se van a tomar en el desarrollo del proyecto profesional de un Centro de Desarrollo Comunitario en el distrito de Comas, en el cual se logre la interacción con su ciudad por medio una arquitectura permeable. Se parte del análisis de las necesidades en la ciudad, la cual en la actualidad posee una disgregación en el acceso de los servicios en sectores donde existen mayores niveles de pobreza, generando de esta manera una variedad de problemáticas tales como la inseguridad o la pérdida del tejido social en la
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5

Wiklund, Viktor. "Fines Content and Density Effects on Tailings Behaviour : A Laboratory Study on Geotechnical Properties." Thesis, Luleå tekniska universitet, Geoteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71685.

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Tailings are a rest product from the extraction of metals and minerals, and is therefore produced in large volumes by all mining companies. One common way to store tailings material is to deposit it as a hydraulic slurry on a tailings impoundment, where the tailings are held in place by tailings dams. Deposit and discharge of tailings, often conducted along the dams, causes a particle segregation which creates different fines contents (percentage of particles smaller than 0,063 mm in the tailings) in the impoundment at various distances from the discharge. Another effect from the discharge is
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6

Rodríguez, Lagunas M. José. "Papel de la cascada del ácido araquidónico en la función epitelial de barrera en un modelo de células intestinales Caco-2." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/117258.

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El epitelio intestinal forma una barrera que permite el paso de nutrientes pero restringe el de substancias potencialmente nocivas. La alteración de dicha función se relación a con enfermedades gastrointestinales como la enfermedad inflamatoria intestinal (IBD) en la que, además, la producción de eicosanoides en la mucosa intestinal se encuentra incrementada. Por ese motivo, el objetivo del presente trabajo ha sido investigar el papel de los eicosanoides producidos en la cascada del ácido araquidónico en la regulación de la función epitelial de barrera en un modelo intestinal de células Caco-2
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7

Kvapilová, Vendula. "Vliv uvolňování zinku při slinování na permeabilitu/indukčnost feritové keramiky." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-444216.

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The diploma thesis is focused on the investigation of the effect of zinc release during ferritic sintering on the permeability/inductance of ferrite ceramics. The theoretical part deals with the position of ferrites among other ceramic materials. It describes the basic characteristics of ferrites, their crystal structure and finally the problems that are directly related to their production and which fundamentally affect the magnetic properties of ferrites. In the second part of the work, the influence of the temperature and time of sintering and the position of the cores in the furnace during
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8

Miró, Martí Ma Lluïsa. "Mecanismes d’acció de l’aldosterona i de la vasopressina en la regulació de les funcions del còlon." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/123493.

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Les hormones del sistema renina-angiotensina-aldosterona i la vasopressina són essencials pel manteniment de l’homeòstasi del Na+ i del volum del líquid extracel•lular. En el còlon distal de rata, l’aldosterona regula l’expressió del canal apical de Na+ (ENaC) i l’activitat de l’ATPasa depenent de Na+ i K+, i també té efectes tròfics, estimulant la proliferació dels miofibroblasts de la beina pericriptal. Els objectius principals d’aquest treball són aprofundir en els mecanismes implicats en la funció del còlon en reabsorbir Na+ i aigua, conèixer el paper de l’aldosterona i de la vasopressina
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9

Hidalgo, Rodríguez Marta. "Estimació de propietats de biopartició mitjançant mesures cromatogràfiques." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/128267.

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La distribució sang-teixit, la permeabilitat en pell i la toxicitat en organismes aquàtics són exemples de propietats de biopartició de compostos químics. Són fonamentals en àmbits tan diversos com el desenvolupament de nous fàrmacs o cosmètics o l’avaluació del impacte mediambiental de contaminants emergents. No obstant, la seva determinació directa sol ser costosa, llarga, experimentalment complicada i inclús èticament qüestionable. Com a conseqüència, existeix un gran interès en poder estimar de manera senzilla propietats de biopartició de compostos químics. Concretament, els sistemes cr
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10

Sanz, Casañas Roser. "Estudios galénicos de nuevas terapias analgésicas tópicas." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/458018.

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El dolor es una de las afecciones más referidas en la consulta clínica y en su tratamiento se utilizan distintos medicamentos según su intensidad, duración, etiología o enfermedad subyacente. La terapia analgésica comprende mayoritariamente el uso de medicamentos analgésicos destinados a reducir y aliviar el dolor ya sea mediante acción local o sistémica. No obstante, además de los medicamentos propiamente clasificados como analgésicos, existen otros fármacos que, no siendo la analgesia su acción terapéutica principal, son útiles en el tratamiento de algunos tipos de dolor. A pesar de la dive
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11

Tzoulaki, Despina, Lars Heinke, Florian Hibbe, and Jörg Kärger. "Surface permeabilities." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-189732.

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12

Romieu, Olivier. "Apport de la perméabilité gazeuse pour l’évaluation de l’étanchéité en odontologie." Thesis, Montpellier 1, 2011. http://www.theses.fr/2011MON12203/document.

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L'évaluation de l'étanchéité des obturations endodontiques in vitro donne lieu à des résultats non reproductibles voir contradictoires qui ne permettent pas de conclure à la supériorité d'une méthode ou d'un matériau. Cette thèse a pour but d'améliorer la connaissance des techniques d'évaluation de l'étanchéité utilisées en endodontie et de mettre au point une nouvelle méthode d'évaluation de la perméabilité des obturations endodontiques utilisant la mesure d'un flux d'azote. Dans une première partie bibliographique, nous réalisons une analyse critique des méthodes d'évaluation de l'étanchéité
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13

Philit, Sven. "Elaboration d'un modèle structural, pétrophysique et mécanique des failles en milieu gréseux poreux : implication pour la migration et le piégeage des fluides." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT090/document.

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La cataclase est un processus de déformation efficace en termes de réduction de porosité et de perméabilité dans les grès poreux, constituant des aquifères et réservoirs d’hydrocarbures classiques. Un enjeu majeur concernant la déformation dans les grès consiste à identifier les processus contrôlant l’évolution des structures cataclastiques et reconnaitre les paramètres influençant l’expression de la déformation à l’échelle microscopique et à l’échelle du bassin.Dans cette étude, nous nous concentrons sur l’analyse structurale des amas (« clusters ») de bande de déformation cataclastiques afin
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14

Ferrero, Giuliana. "Development of an air-scour control system for membrane bioreactors." Doctoral thesis, Universitat de Girona, 2011. http://hdl.handle.net/10803/32202.

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The thesis involves the development and implementation of a new and robust control system based on permeability trends but at the same time capable of reducing aeration proportionally to permeate flux. Permeability was made a key parameter for directly comparing temporary changes in membrane performance. Transmembrane pressure and flux were gathered every 10 seconds and permeability values were automatically calculated; different mathematical algorithms were applied for the signal filtering of on-line data. Short term and long term permeability trends were compared once a day, and a con
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15

Hanvongjirawat, Wiwat. "Permeabilität von Holzwerkstoffmatten." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968639941.

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16

Reid, Richard A. "Triaxial permeability device." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/20036.

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17

Mallandrich, Miret Mireia. "Estudio de formulaciones de ketorolaco de trometamina para aplicación sobre mucosas y piel." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/457865.

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En los últimos años, la investigación farmacéutica se ha centrado en mejorar el efecto de terapias actuales desarrollando nuevas formas farmacéuticas o vías de administración. Las rutas de administración transdérmica y transmucosa son una atractiva alternativa a la vía oral y a la parenteral, puesto que permiten evadir algunas desventajas que presentan estas vías tales como el efecto de primer paso hepático o disminuyendo efectos adversos como las irritaciones o ulceraciones gástricas. El Ketorolaco Trometamina es un fármaco anti-inflamatorio no esteroideo que por vía oral presenta dichas de
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18

Cunningham, Michael (Michael Ian) Carleton University Dissertation Engineering Civil and Environmental. "Relative permeability measurements for two phase flow through low permeability soils." Ottawa, 1994.

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19

Hudd, Raymond W. "Measurement of concrete permeability." Thesis, Loughborough University, 1989. https://dspace.lboro.ac.uk/2134/6722.

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A comparison was made between a number of laboratory and in-situ concrete permeability test methods. The laboratory tests used measured air, water, and water vapour permeability, whilst the in-situ tests used were the Initial surface absorption test, the Figg air and water tests, and a new in-situ method called the Egg test; a non-destructive surface test which measures air permeability properties. An initial set of tests were carried out on six concrete mixes with water: cement(w/c) ratios between 0.3 and 0.8. These tests showed that problems existed with both the laboratory and in-situ test
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20

Taherzadeh, Morteza. "Nifedipine and microvascular permeability." Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299874.

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21

Dennison, Patrick Winford. "Epithelial permeability in asthma." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/416625/.

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Our knowledge and understanding of asthma have evolved over time, leading to new and improved treatments for this disease. Despite existing treatments however, there remains to date a significant proportion of asthmatics who remain poorly controlled, with unmet needs. Most existing treatments are based on the Th2-driven inflammation model of asthma, however there is increasing recognition of the importance of the epithelium in asthma pathogenesis. It has been proposed that the asthmatic epithelium is chronically damaged and unable to repair, with increased permeability as a result. Existing tr
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22

Daly, Philip J. "Permeability of pseudomonas aeruginosa." Thesis, Aston University, 1986. http://publications.aston.ac.uk/12458/.

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23

Lorente, Ayza María Magdalena. "Membranas cerámicas de bajo coste para el tratamiento de aguas residuales." Doctoral thesis, Universitat Jaume I, 2017. http://hdl.handle.net/10803/402726.

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El principal objetivo de este trabajo es determinar el efecto que ejercen sobre las propiedades de las membranas de bajo coste las características del material generador de poros (en el presente trabajo, almidón o chamota porosa sintetizada ex profeso) y las variables del proceso de síntesis (conformado por prensado o extrusión, temperatura de sinterización, tiempo de permanencia a máxima temperatura, etc.,). De este modo, las composiciones de las membranas se basan en materias primas económicas, empleadas habitualmente en el sector de fabricación de baldosas cerámicas, tales como arcillas, fe
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24

Jim, Nilsson. "Fracture characterization in magmatic rock, a case study of the Sosa-dyke (Neuquén Basin, Argentina)." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-411548.

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There are many examples worldwide were fossil magmatic intrusions influence the local water and energy supply. Due to that intrusions can act as a conductor and a reservoir, but also as a barrier for fluids and gases in the ground. The decisive feature between conductor or barrier in an intrusion is its fracture network. Hence it is of paramount importance to characterize an intrusion’s fracture network and thus its permeability. However, other than through boreholes magmatic intrusions are rather inaccessible and very little is known about their influence on aquifers and reservoir rocks in th
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Jacobs, Frank Jacobs Frank Jacobs Frank. "Permeabilität und Porengefüge zementgebundener Werkstoffe /." Zürich, 1994. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10818.

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26

Bulejko, Pavel. "Porézní přepážky na bázi partikulárních materiálů a anorganických pojiv." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216999.

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Tato diplomová práce zkoumá možnosti tvorby porézních struktur za použití partikulárních materiálů pojených anorganickými pojivy bez dodatečné tepelné úpravy vypalováním. Jako základní pojiva byly použity portlandský a hlinitanový cement a pojiva na bázi alkalicky aktivovaného metakaolinu (geopolymeru). Jako základní kamenivo byl použit karbid křemíku v různých frakcích podle velikosti částic. Byly taktéž použity další zrnité materiály, např. křemenný písek anebo odpadních materiálů (mleté sklo a porcelán) roztříděných do frakcí podle velikosti částic. Byl sledován vliv složení a množství kame
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Scheerlinck, Kris W. B. "Depth Configurations. Proximity, permeability and territorial boundaries in urban projects." Doctoral thesis, Universitat Ramon Llull, 2010. http://hdl.handle.net/10803/9132.

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La tesi considera les configuracions de profunditat i control d'accés com els paràmetres principals de la recerca acadèmica. L'àmbit de la investigació es defineix per una escala intermitja i alternant, associada a la complexitat dels projectes urbans: desde l'escala domèstica, a l'escala de barri fins a la dimensió i la complexitat de les zones de desenvolupament urbà. La tesi pronuncia un discurs teòric i conceptual sobre la profunditat, verificat amb la re-lectura de projectes històrics i contemporanis que utilitzen diversos models de proximitat i accessibilitat. La investigació acadèmica i
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Wong, Wing-yee. "Permeability studies in rock fractures." View the Table of Contents & Abstract, 2002. http://sunzi.lib.hku.hk/hkuto/record/B30109334.

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Khajeh, Ehsan. "Permeability of hypoeutectic aluminum alloys." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/36586.

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The interdendritic permeability is a critical parameter that defines the feedability of the mushy zone during solidification. In this study, a theoretical expression to describe the evolution of permeability throughout the complete solidification range (from dendritic to dendritic/eutectic) of hypoeutectic aluminum alloys has been derived, verified and validated through physical and numerical modeling. The permeability of the primary, equiaxed, dendritic phase has been characterized using geometries obtained by X-ray microtomographic analysis of Al-4.5wt%Cu alloy samples quenched at different
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30

Weaver, Laurence Trevelyan. "The intestinal permeability of infants." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289788.

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Mirza, Nabeel Aman. "Geophysical modelling of sediment permeability." Thesis, Bangor University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280908.

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Bills, Victoria Louise. "Vascular permeability in pre-eclampsia." Thesis, University of Bristol, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508075.

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Wong, Wing-yee, and 黃詠儀. "Permeability studies in rock fractures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B43895013.

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Smethurst, Paul R. "Small intestinal permeability in man." Thesis, Open University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315531.

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Evans, N. J. "Skin permeability in the newborn." Thesis, University of Southampton, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373865.

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36

Nordquist, Taylor James. "Permeability anisotropy of resedimented mudrocks." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99578.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 257-260).<br>Permeability anisotropy (ratio of horizontal to vertical permeability) is an important but uncertain parameter used in characterizing underground formations. While it is a fairly unknown parameter, it is integral for the petroleum industry, where a greater permeability anisotropy understanding can greatly aid in basin modelling, pore pressure prediction, and borehole stability. This rese
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Remond, Michel. "Pontentiels tardifs et permeabilite coronaire." Montpellier 1, 1992. http://www.theses.fr/1992MON11025.

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Chen, Anthia Yenshiu. "The hydrodynamic permeability of sclera." Thesis, Massachusetts Institute of Technology, 1991. https://hdl.handle.net/1721.1/129505.

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Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.<br>Includes bibliographical references (leaves 30-31).<br>by Anthia Yenshiu Chen.<br>Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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Yamakawa, Masatoshi. "Chloride permeability of distressed concrete." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1455163.

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Halihan, Todd. "Permeability structure in fractured aquifers /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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Kumar, Prashant. "Investigation of Kelvin-like solid foams for potential engineering applications : an attractive set of geometrical and thermo-hydraulic properties." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4730/document.

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Les mousses à cellules ouvertes ont diverses applications industrielles, par exemple pour des échangeurs de chaleur, des réacteurs structurés, la filtration, la catalyse, récepteurs solaires volumétriques en raison de leurs propriétés uniques telles qu'une importante porosité et une surface spécifique élevée. Pour déterminer théoriquement la surface spécifique géométrique et les relations entre les paramètres géométriques de mousses, une corrélation mathématique généralisée a été développée. A cet effet, la géométrie de la tetrakaidecahedron a été utilisé et différentes formes de sections tran
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Carroll, Kelly Patrick. "Permeability of Lake Ice in the Taylor Valley, Antarctica: From Permeameter Design to Permeability Upscaling." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1206545662.

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BECHERER, UTE. "Evolution des permeabilites ioniques au cours de la differenciation in vitro des cellules des grains du cervelet de rat : definition du potential de repos et caracterisation de la permeabilite du recepteur gaba#a." Université Louis Pasteur (Strasbourg) (1971-2008), 1996. http://www.theses.fr/1996STR13224.

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Le developpement in vitro des cellules des grains du cervelet est favorise par le glutamate, dont l'effet est mime par un milieu enrichi en kc1. La depolarisation attendue est sensee induire une augmentation du calcium intracellulaire, qui semble indispensable a la survie des grains en culture. Les travaux publies ont cependant rapporte un potentiel tres bas et jete quelques doutes quant a l'existence de permeabilites calciques dependantes du potentiel en debut de culture. Le potentiel de repos des grains du cervelet de rat a ete etudie durant la premiere semaine en culture primaire. Le potent
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Nasiri, Syah Johan Ali. "Gas permeabilities and separation in membranes." Thesis, University of Salford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238802.

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Martin, Boris. "Etudes expérimentales de l’influence des paramètres de conception des renforts NCF unidirectionnels sur leurs propriétés de transport et leurs performances mécaniques." Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0084.

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L'augmentation des dimensions des éoliennes est nécessaire pour réduire le coût du rendement énergétique des parcs éoliens. L'optimisation de ces structures est liée aux renforts fibreux qu'elles utilisent. La rigidité des pâles d'éoliennes provient des longerons en composites monolithiques mis en forme à partir de renforts NCF (« Non-Crimp Fabrics ») unidirectionnels et de résine thermodurcissable. Les renforts se présentent sous forme d'empilement de deux couches (0° et+/- 80°) cousues dans l'épaisseur par un fil polyester. La structure fibreuse, contrôlée par les paramètres de conception, i
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46

Danysh, Brian P. "Mechanisms behind lens capsule selective permeability." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 205 p, 2010. http://proquest.umi.com/pqdweb?did=1992441981&sid=7&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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47

Siddiqui, Adil Ahmed. "Towards a characteristic equation for permeability." Texas A&M University, 2008. http://hdl.handle.net/1969.1/86054.

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The characterization of reservoir permeability (k) remains the elusive challenge in reservoir engineering. This work considers prior developments in an evolutionary sense, and, as with prior work, our goal is the development of a "characteristic permeability relation" (CPR). To this end, we have developed 5 CPR formulations -- 3 of which could be considered modifications of "historical" models and 2 of which are "weighted" power law-exponential models. In this work, we consider permeability to be only a function of two variables; k = f(ø,z) -- porosity (ø ) and z, where z is either the water s
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Watson, Catherine E. "The permeability of Drosophila melanogaster embryos." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29203.

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Drosophila are used extensively for genetic, developmental and now molecular biology research. At present, germline transformation of these organisms can only be achieved by microinjection of P-element vectors into the pole cells of young embryos. The technique of microinjection however, requires a delicate touch and is quite laborious. Therefore, the development of a rapid and simple technique was investigated. Electroporation, like microinjection, is a physical means of introducing DNA into a cell and is therefore potentially applicable to all cell types. Electroporation involves the use of
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49

Lang, Mia E. "Intestinal permeability in the irradiated ferret." Thesis, University of Ottawa (Canada), 1991. http://hdl.handle.net/10393/7772.

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Ferrets received whole-body irradiation (5 Gy, gamma). At different times post-irradiation (PIRR, 2, 24, and 48 hours), measurements of fluid and electrolyte fluxes, and of the blood-to-lumen clearance of $\sp{51}$Cr-EDTA, were compared between in situ perfused loops of jejunum and ileum. Intestinal permeation of $\sp{51}$Cr-EDTA was increased (4x control) in both the jejunum and ileum at 2 hours PIRR. At 24 hours PIRR, $\sp{51}$Cr-EDTA permeation was the same as control. At 48 hours PIRR, jejunal permeation of $\sp{51}$Cr-EDTA was not statistically different from control animals, whereas in t
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Gauthier, Alain R. "The permeability of a lipid bilayer." Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27136.

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This work presents results on the permeability of a lipid bilayer to water molecules. We look at the change in bilayer permeability as a function of lipid structure and area per lipid molecule. A molecular dynamic simulation (MDS) of a solvent surfactant system was used in the canonical ensemble to simulate the membranes. Permeability was obtained by calculating the permeative resistance. This method, developed by Marrink and Berendsen, allows the sampling of very long time scale events on short time scale simulations. The structural properties of the simulated bilayer are studied and compared
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