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Teses / dissertações sobre o tema "Membrane"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

PAGLIERO, MARCELLO. "New membranes for membrane distillation process." Doctoral thesis, Università degli studi di Genova, 2021. http://hdl.handle.net/11567/1046350.

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The PhD research program was focused of the development of new hydrophobic membranes suitable for membrane distillation (MD) operation. In particular, the preparation of polymeric flat sheet membranes via nonsolvent induced phase separation (NIPS) technique was investigated. This method allows to fine-tune a large number of variables in order to obtain membranes with an ample variety of different morphologies and properties. Therefore, a systematic study on the important factors affecting the membrane structure, which in turn determines the distillation performance, was carried out. The select

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2

Fawzy, Mohamed Khaled Adel <1990&gt. "Innovative Ceramic Membranes for Sweeping Gas Membrane Distillation: Membrane Characterization and Process Development." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amsdottorato.unibo.it/9284/1/PhD_Thesis_Mohamed_Fawzy.pdf.

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The employment of tubular hydrophobic carbon-based titania membranes in sweeping gas membrane distillation (SGMD) was studied in this PhD thesis. The characterization of some of the membrane morphological properties was implemented by experimental and modeled results of gas permeation tests. The dusty gas model was adopted in gas permeation modeling. Two different approaches were followed during modeling. The first approach considered the morphological properties of each single membrane layer. As for the second approach, average membrane morphological properties were characterized without cons

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3

Rane, Mahendra. "Porous Membrane." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-201000336.

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Membrane processes can cover a wide range of separation problems [with a specific membrane (membrane structure) required for every problem]. Thus, there are membranes available that differ in their structure and consequently in the functionality. Therefore membrane characterization is necessary to ascertain, which membrane may be used for a certain separation. Membranes of pore size ranging from 100nm to 1μm with a uniform pore size are very important in membrane technology. An optimum performance is achieved when the membrane is as thin as possible having a uniform pore size. Here in this the

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4

Shi, Jinjun. "Composite Membranes for Proton Exchange Membrane Fuel Cells." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1214964058.

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5

Roselló, Busquets Cristina. "Paper de la Sintaxina-1 i els lipid rafts en guia axonal i regeneració neural." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/668211.

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Durant el desenvolupament del sistema nerviós cal que les cèl·lules formades a una zona concreta migrin fins a la seva posició final o bé que projectin els seus axons per tal de contactar amb les seves cèl·lules diana. En aquest procés participen multitud de molècules de guia axonal i els seus receptors, que produiran l’atracció o la repulsió de l’axó, guiant-lo fins a la seva posició final. En aquest procés el conus de creixement té un paper clau ja que és on es localitzen la majoria d’aquests receptors i on es dona el recanvi de membrana a través de l’exocitosi i endocitosi, necessàries pel

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6

Whitehead, L. "Computer simulation of biological membranes and membrane bound proteins." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297412.

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7

Dickson, Callum. "In silico modelling of membranes and drug membrane interactions." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/25070.

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A new all-atom force field for the simulation of phospholipid bilayers using the AMBER molecular dynamics package has been developed, which is compatible with other AMBER protein, nucleic acid, carbohydrate and small molecule force fields. The force field has been validated by simulating bilayers of six different lipid types, finding favourable comparison to experiment for properties such as area per lipid, volume per lipid, bilayer thickness, NMR order parameters, scattering data, and lipid lateral diffusion. The modular nature of this force field allows numerous combinations of head and tail

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8

Ma, Yaning. "Characterization of Membrane Permeability and Polymer-Stabilized Model Membranes." Thesis, The University of Arizona, 2007. http://hdl.handle.net/10150/193347.

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The permeability of lipid bilayer membranes to glucose and carboxyfluorescein has been studied in model membranes. Using an enzyme assay, the permeability of glucose was monitored spectrometrically with both large and giant unilamellar vesicles (LUVs and GUVs). The permeability of carboxyfluorescein was studied by entrapping the dye and monitoring its leakage over time from a single GUV. Permeability study using GUVs may provide new information that cannot be obtained from LUVs.The stability of lipid membranes was enhanced by incorporating polymer scaffold. LUVs were prepared with hydrophobic

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9

Lycon, David Steven. "Flux enhancement and fouling reduction in a centrifugal membrane process." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0021/NQ44796.pdf.

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10

Keuler, Johan Nico. "Optimising catalyst and membrane performance and performing a fundamental analysis on the dehydrogenation of ethanol and 2-butanol in a catalytic membrane reactor." Thesis, Link to the online version, 2000. http://hdl.handle.net/10019.1/1277.

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11

Barron, Olivia. "Catalyst Coated Membranes (CCMs) for polymerelectrolyte Membrane (PEM) fuel cells." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_4757_1307336145.

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<p>The main objective of this work it to produce membrane electrode assemblies (MEAs) that have improved performance over MEAs produced by the conventional manner, by producing highly efficient, electroactive, uniform catalyst layers with lower quantities of platinum electrocatalyst. The catalyst coated membrane (CCM) method was used to prepare the MEAs for the PEM fuel cell as it has been reported that this method of MEA fabrication can improve the performance of PEM fuel cells. The MEAs performances were evaluated using polarisation studies on a single cell. A comparison of polarisation curv

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12

Tremblay, André Y. "The role of structural forces in membrane transport: Cellulose membranes." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5886.

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The phenomena governing Transition RO/UF (nanofiltration) membrane transport have been critically studied. The residuals and predicted pore sizes of 965 individual permeation runs performed on 70 cellulose membranes were used to discriminate between several restricted transport models and various solute-solvent-membrane material interactions. Solute-membrane interactions were found to be mediated by the presence of structured solvent at the surface of the membrane. Two new interaction parameters, $\Psi\sb{DP}$ and $\kappa\sp\prime$ describing structural solvent forces at the surface of a membr

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13

Choi, Jonghyun. "Nanofiber Network Composite Membranes for Proton Exchange Membrane Fuel Cells." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1260461818.

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14

Ali, Aamer. "Evaluation of membrane characteristics and thermal polarization in membrane distillation." Thesis, Toulouse 3, 2015. http://www.theses.fr/2015TOU30359/document.

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Le présent travail de thèse met l'accent sur divers aspects de la distillation membranaire dans l'objectif de concevoir des procédés de dessalement proches du " zéro effluent liquide ". De manière générale, deux sujets sont discutés en détail: (i) la corrélation entre les caractéristiques de la membrane et les performances du procédé de distillation membranaire (ii) la compréhension et le contrôle de la polarisation thermique en DM. L'analyse de l'état de l'art en distillation membranaire porte notamment sur les progrès dans le développement des membranes, dans la compréhension des phénomènes

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15

Baghbanzadeh, Mohammadali. "Nano-composite Membranes and Zero Thermal Input Membrane Distillation for Seawater Desalination." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35742.

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In this PhD thesis, seawater desalination by Membrane Distillation (MD) has been explored from the perspective of process and membrane. Regarding the process, an innovative, energy efficient, and environmentally friendly Zero Thermal Input Membrane Distillation (ZTIMD) process was proposed. ZTIMD uses thermal energy stored in seawater, which makes the process sustainable by being independent of the external sources of thermal energy, which is one of the major contributors to the cost and energy consumption of conventional MD desalination processes. Economic feasibility study was carried out fo

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16

Barbe, Aron Mervyn. "The fouling of hydrophobic, microporous membranes used in osmotic distillation." Thesis, Queensland University of Technology, 2001.

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17

Malewitz, Timothy. "Modeling Equilibrium Salt Partitioning in Neosepta AMX and Selemion AMV Antion Exchange Membranes." Case Western Reserve University School of Graduate Studies / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1249342152.

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18

Murugesan, Viyash. "Optimization of Nanocomposite Membrane for Membrane Distillation." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36534.

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In this study, effects of nanoparticles, including 7 nm TiO2, 200 nm TiO2, and hydrophilic and hydrophobic SiO2 with mean diameter in the range of 15–20 nm and their concentration on the membrane properties and vacuum membrane distillation (VMD) performance were evaluated. The effect of membrane thickness and support materials were also investigated. The membranes were characterised extensively in terms of morphology (SEM), water contact angle, water liquid entrance pressure (LEPw), surface roughness, and pore size. While the best nanocomposite membranes with 200 nm TiO2 Nanoparticles(NPs) wer

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19

Chen, Cheng. "Membrane degradation studies in PEMFCs." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29712.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Fuller, Thomas; Committee Member: Beckham, Haskell; Committee Member: Hess, Dennis; Committee Member: Koros, William; Committee Member: Meredith, Carson. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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20

Josyula, Ratnakar. "Structural studies of yeast mitochondrial peripheral membrane protein TIM44." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2009. https://www.mhsl.uab.edu/dt/2009p/josyula.pdf.

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21

Guseva, Ksenia. "Formation and cooperative behaviour of protein complexes on the cell membrane." Thesis, University of Aberdeen, 2011. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=203444.

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In this work we analyse aspects of dynamics and organization of biological membranes from a physical prospective [i.e. perspective]. We provide an analysis of the process of self-assembly and spatial organization of membrane proteins. We illustrate the analysis by considering a channel activated by membrane tension called mechanosensitive channels (MS), in E. coli and the twin arginine translocation system (Tat). We analyse the mechanism of formation of oligomeric protein complexes formed by identical subunits. By derivation of a mathematical approach based on Smoluchowski coagulation equation

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22

Kota, Jhansi. "Membrane chaperones : protein folding in the ER membrane /." Stockholm : Karolinska institutet, 2007. http://diss.kib.ki.se/2007/978-91-7357-102-9/.

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23

Aryanti, Nita. "Fundamentals of Membrane Emulsification and Rotating Membrane Emulsification." Thesis, University of Leeds, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507864.

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24

Pridmore, Catherine Jane. "Analytical methods for the study of membranes and peptide-membrane interactions." Thesis, Durham University, 2010. http://etheses.dur.ac.uk/807/.

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This thesis describes analytical work carried out to determine the stability and properties of lipid and peptide-lipid systems. Matrix-assisted laser desorption/ionisation mass spectrometry (MALDI-MS) and tandem mass spectrometry (MSMS) analyses were carried out to establish a validated protocol for the complete identification of phospholipids, including the nature of the headgroup and acyl chains and the positions of the acyl chains on the glycerol backbone. Statistical differences were observed in the relative intensities of peaks corresponding to the neutral loss of the acyl chain from the

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25

Daisley, Gavin Rhys. "Membrane Aromatic Recovery System (MARS) : improved membranes and a further application." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508324.

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26

Xu, Lili. "Electrically tuneable membranes : revolutionising separation and fouling control for membrane reactors." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.715263.

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The overall aim of this research is to develop unique conducting polyaniline (PANI) membranes that can be electrically tuned to achieve different fluxes and selectivity. The target application is in a tuneable membrane reactor, where these membranes allow the fouling layer to be pushed off/through membranes by application of external potential. To achieve this, several different types of PANI membranes were examined. The permeation properties of HCl-doped PANI membranes can be modified electrically to produce in-situ tuneable separations. However, acid dopant leaching and membrane brittleness

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27

LADHA, PARAG. "POLYMERIC MEMBRANE SUPPORTED BILAYER LIPID MEMBRANES RECONSTITUTED WITH BIOLOGICAL TRANSPORT PROTEINS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1145901880.

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28

Collins, S. E. "Membrane emulsification." Thesis, Swansea University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636279.

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Membrane emulsification is a technique which uses the pores of a microporous membrane to disperse one of two immiscible liquids, the disperse phase, into another liquid, the continuous phase, by applying pressure. The possible advantages of using this technique are that it is a low-shear, low-energy process capable, in theory, of producing an emulsion with a narrow droplet size. The main aim of this study was to provide a systematic analysis of membrane emulsification processes for the production of O/W emulsions using commercial available equipment and membranes. An experimental approach was

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29

Deyhim, Sina. "Deriving Gas Transport Properties of Microporous Silica Membranes from First Principles and Simulating Separation of Multi-Component Systems in Different Flow Configurations." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31340.

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Amorphous silica membranes have molecular sieving properties for the separation of hydrogen from gas mixtures at high temperature. Consequently, they are considered to be applied in separation of a shifted syngas coming out of a water-gas-shift-reactor into the syngas and hydrogen. This separation is a key to an Integrated Gasification Combined Cycle (IGCC) plant, which would allow reducing the carbon footprint in power generation industry. The main objective of this thesis was to carry out a preliminary assessment of suitability of currently available amorphous silica membranes for this separ

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30

Boulter, Jonathan Michael. "Structural and functional studies of the erythrocyte anion exchanger, band 3." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297079.

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31

Araujo, Paulo Jardel Pereira. "Avaliação da permeabilidade em membrana tubular de TiO2/AL2O3 dos constituintes do sistema reacional heterogêneo para produção de biodiesel." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266802.

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Orientadores: Teresa Massako Kakuta Ravagnani, Leila Peres<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-18T23:18:07Z (GMT). No. of bitstreams: 1 Araujo_PauloJardelPereira_D.pdf: 15740528 bytes, checksum: bd5969744efcacfde55b69c10f951f33 (MD5) Previous issue date: 2011<br>Resumo: O biodiesel além de ser biodegradável e obtido de fontes renováveis, apresenta propriedades físico-químicas muito semelhantes ao diesel de petróleo, não necessitando de um novo motor para utilização do mesmo. A rota química mais comume

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32

Mokrani, Touhami. "Transport of gases across membranes." Thesis, Peninsula Technikon, 2000. http://hdl.handle.net/20.500.11838/878.

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Thesis (MTech (Chemical Engineering))--Peninsula Technikon, 2000.<br>Oxygen transport across biofilms and membranes may be a limiting factor in the operation of a membrane bio-reactor. A Gradostat fungal membrane bio-reactor is one in which fungi are immobilized within the wall of a porous polysulphone capillary membrane. In this study the mass transfer rates of gases (oxygen and carbon dioxide) were investigated in a bare membrane (without a biofilm being present). The work provides a basis for further transport study in membranes where biomass is present. The diaphragm-cell metho

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33

Duncan, Anna Louise. "Coarse-grained molecular dynamics simulations of mitochondrial membrane proteins." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648455.

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34

Tuan, Chik Syed Mohd Saufi. "Mixed Matrix Membrane Chromatography for Bovine Whey Protein Fractionation." Thesis, University of Canterbury. Chemical and Process Engineering, 2010. http://hdl.handle.net/10092/3647.

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Whey protein fractionation is an important industrial process that requires effective large-scale processes. Although packed bed chromatography has been used extensively, it suffers from low processing rates due to high back-pressures generated at high flow rates. Batch chromatography has been applied but generally has a low efficiency. More recently, adsorptive membranes have shown great promise for large-scale protein purification, particularly from large-volume dilute feedstocks. A new method for producing versatile adsorptive membranes by combining membrane and chromatographic resin matric

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35

Yurdakul, Ahmet Ozgur. "Acid Doped Polybenzimidazole Membranes For High Temperature Proton Exchange Membrane Fuel Cells." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608506/index.pdf.

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Acid Doped Polybenzimidazole Membranes for High Temperature Proton Exchange Membrane Fuel Cells Author: Ahmet &Ouml<br>zg&uuml<br>r Yurdakul One of the most popular candidates for high temperature PEMFC&rsquo<br>s is phosphoric acid doped polybenzimidazole (PBI) membrane due to its thermal and mechanical stability. In this study, high molecular weight PBI was synthesized by using PPA polymerization. The stirring rate of reaction solution was optimized to obtain high molecular weight. The inherent viscosity of polymer was measured at four points in 96 percent sulphuric acid solution at 30 degre

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36

Suk, Daniel Eumine. "Development of surface modifying macromolecule blended polyethersulfone membranes for vacuum membrane distillation." Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/29319.

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Surface modifying macromolecule (SMM) has been developed aiming at the preparation of membranes with greater surface hydrophobicity and greater chemical resistivity at a lower cost than conventional hydrophobic membranes. Throughout the whole work in this study, the membranes, which contains SMM as an additive and PES as a base polymer, are called 'SMM blended PES membranes' or 'SMM modified PES membranes'. The objective of this study is the preparation of SMM blended membranes to be used for the removal of VOCs from their aqueous solutions by the membrane distillation process. In the first pa

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37

Lu, Jun-xia. "Solid-state NMR studies of phospholipid model membranes and membrane-associated macromolecules." Oxford, Ohio : Miami University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1184090235.

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38

Bannwarth, Sebastian [Verfasser]. "Characterization of Membranes and Membrane Processes by Electrical Impedance Spectroscopy / Sebastian Bannwarth." Aachen : Shaker, 2017. http://d-nb.info/113817842X/34.

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39

Winkler, Gudrun. "Effects of configuration on the operation of membranes in membrane biological reactors." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/7960.

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The aim of this work included the investigation of the impact of membrane material properties on fouling propensity and permeate flux decline in MBR biomass systems. Furthermore, the impact of membrane configuration on the respective fouling behaviour was of interest. A direct comparative study of different membrane module configurations including a multi-tubular membrane (MT), a single flat sheet module (FS) and a hollow fibre (HF) pilot scale module was undertaken. Membrane module filtration performances, especially with respect to their fouling propensity under varying hydraulic conditions,

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40

Hill, Melinda Lou. "Polymeric and Polymer/Inorganic Composite Membranes for Proton Exchange Membrane Fuel Cells." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/37597.

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Several types of novel proton exchange membranes which could be used for both direct methanol fuel cells (DMFCs) and hydrogen/air fuel cells were investigated in this work. One of the main challenges for DMFC membranes is high methanol crossover. Nafion, the current perfluorosulfonic acid copolymer benchmark membrane for both DMFCs and hydrogen/air fuel cells, shows very high methanol crossover. Directly copolymerized disulfonated poly(arylene ether sulfone)s copolymers doped with zirconium phosphates and phenyl phosphonates were synthesized and showed a significant reduction in methanol pe

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41

Lu, Junxia. "Solid-state NMR studies of phospholipid model membranes and membrane-associated macromolecules." Miami University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=miami1184090235.

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42

Hengl, Nicolas. "Conception et étude d'un évaporateur membranaire à membrane métallique." Montpellier 2, 2008. http://www.theses.fr/2008MON20167.

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L'Evaporation Membranaire est un nouveau type de procédé utilisant un contacteur à membrane liquide/gaz pour la concentration de produits thermosensibles à haute valeur ajoutée. Ce procédé permet de mettre en contact par l'intermédiaire d'une membrane macroporeuse métallique hydrophobe, une solution aqueuse à concentrer et une phase extractante à savoir de l'air sec. La force motrice du transfert est la différence de pression partielle de vapeur d'eau existant de part et d'autre de la membrane. Les propriétés de conduction thermique et électrique des membranes métalliques permettent un apport

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43

Serrano, Albarrás Antonio. "Heteromeric composition of the Kv 1.3 channelosome = Composició heteromèrica del canalosoma Kv1.3." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/665245.

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Ion channels are transmembrane proteins containing aqueous pores which, once open, permit the pass of ions through the plasma membrane. This ion flux takes places following the electrochemical gradient for the specific ion. Kv1.3 is a voltage-gated potassium channel which is member of the Shaker superfamily. Its basic structure consists in a protein with six transmembrane domains, while the functional channel is formed by 4 copies of this protein. Kv1.3 participates in a great amount of physiological functions: nervous system, immune system, insulin signaling or cell proliferation. In the im

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44

Araujo, Paulo Jardel Pereira. "Modelagem e simulação da operação de um reator de leito fixo catalitico envolto em membrana permseletiva." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266239.

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Orientador: Teresa Massako Kakuta Ravagnani<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-08T19:44:43Z (GMT). No. of bitstreams: 1 Araujo_PauloJardelPereira_M.pdf: 1672087 bytes, checksum: 39df6a7017efe009f53dbd9aecb301b1 (MD5) Previous issue date: 2007<br>Resumo: Estireno é um importante monômero na fabricação de termoplásticos e borrachas sintéticas. Grande parte de sua produção é baseada na desidrogenação catalítica do etilbenzeno. O aumento da produtividade do estireno pode ser alcançado utilizando-se

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45

Lee, Chongsoo. "Raman spectroscopy of supported lipid bilayers and membrane proteins." Thesis, University of Oxford, 2005. http://ora.ox.ac.uk/objects/uuid:76f4be6e-b7d3-46c5-a2a1-3dcc7a399410.

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Off-resonance unenhanced total internal reflection (TIR) Raman Spectroscopy was explored to investigate supported single lipid bilayers with incorporated membrane peptides/proteins at water/solid interface. A model membrane was formed on a planar supported lipid layer (pslb) by the fusion of the reconstituted small unilamellar vesicles (SUVs), and the intensity of bilayer was confirmed by a comparison of Raman spectral intensity in the C-H stretching modes with C<sub>16</sub>TAB. With prominent Raman sensitivity attained, we studied the 2-D phase transition of DMPC and DPPC pslbs and the tempe

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Liu, Junqiang. "Development of next generation mixed matrix hollow fiber membranes for butane isomer separation." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42807.

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Mixed matrix hollow fiber membranes maintain the ease of processing polymers while enhancing the separation performance of the pure polymer due to inclusion of molecular sieve filler particles. This work shows the development process of high loading mixed matrix hollow fiber membranes for butane isomer separation, from material selection and engineering of polymer-sieve interfacial adhesion to mixed matrix hollow fiber spinning. The matching of gas transport properties in polymer and zeolite is critical for forming successful mixed matrix membranes. The nC4 permeability in glassy commercial p

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47

Blazheska, Jasna. "Insight in the thin-film pollyamide membrane structure after compaction." Doctoral thesis, Universitat Rovira i Virgili, 2016. http://hdl.handle.net/10803/401281.

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La osmosi inversa (OI) és la tecnología de membrana que proporciona el nivell més fi de separació i una de les tecnologies més prometedores per a superar el problema de l'escassetat mundial d'aigua neta. El mercat de membranes de RO està dominat per les membranes de pel·lícula fina (TFC) de poliamida. Quan s'operen a alta temperatura (max 45°C) i alta pressió (màxim 82 bar), poden patir compactació, el que resulta en una reducció de la producció de permeat (> 30%), que ha de ser compensat amb un augment de la pressió d'alimentació per satisfer els paràmetres de disseny. Això acaba resultant es

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48

Poletto, Patrícia. "Caracterização de membranas de poliamida 66 preparadas pelo método de inversão de fases." reponame:Repositório Institucional da UCS, 2010. https://repositorio.ucs.br/handle/11338/573.

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Neste trabalho foram preparadas membranas de poliamida 66 (PA 66) pelo método de inversão de fases (IF) e caracterizadas com o objetivo de verificar sua possível aplicação em processos de separação. As membranas de PA 66 foram preparadas utilizando dois solventes diferentes, ácido fórmico (AF) e ácido clorídrico (HCl) e água como não-solvente. As membranas preparadas na forma de filmes (não suportadas) foram caracterizadas por Espectroscopia de Infravermelho com Transformada de Fourier (FT-IR) e calorimetria exploratória diferencial (DSC), onde os resultados mostraram que a estrutura química e

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Sonnen, Andreas Franz-Peter. "Structural biology of protein-membrane interactions and membrane protein function." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.514997.

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50

Pokorná, Šárka. "Studium membránových interakcí pomocí pokročilých fluorescenčních technik: Od iontů k makromolekulám." Doctoral thesis, 2016. http://www.nusl.cz/ntk/nusl-353430.

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Advanced fluorescence techniques were used to explore tree distinct topics concerning biological membrane and their interactions. Following thesis is according to the topic divided into three parts: 1) Ionic effects were studied employing time dependent fluorescence shift experiments and molecular dynamic simulations. Combination of these two approaches are suitable to reveal characteristic like mobility and hydration of particular bilayer segment, lipid packing or ion binding sites. Halide anions were reported to adsorb to the cationic lipid bilayer specifically, altering membrane mobility an

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