Log in

Relevant bibliographies by topics / Membranes / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Membranes.

Dissertations / Theses on the topic 'Membranes'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Membranes.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

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

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

2

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

3

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

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

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

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

5

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

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

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

8

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

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

9

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

10

Wu, Diana. "Effect of membrane thickness and unsaturation on dye efflux rates induced by [delta]-Lysin from phosphatidylcholine vesicles /." Electronic version (PDF), 2005. http://dl.uncw.edu/etd/2005/wud/dianawu.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Marczewski, Dawid. "Membranes via particle assisted wetting." Doctoral thesis, Universitätsbibliothek Chemnitz, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200901190.

Full text

Abstract:

Spreading of mixtures of oil with suitable silica particles onto a water surface leads to the formation of composite layers in which particles protrude at the top and at the bottom from the oil. Solidification of the oil and removal of the particles give rise to porous membranes. Pore widths and membrane thicknesses depend on particle sizes and usually are in the range of 70 – 80% of their diameters. Often freely suspended porous membranes are too fragile to operate them in pressure filtration without supportive structure. To improve mechanical stability of porous membranes, a mixture of silic

APA, Harvard, Vancouver, ISO, and other styles

12

SILVA, Mirele Costa da. "Membranas anisotrópicas de alumina sintetizada pelo método pechini para aplicações em processos de separação." Universidade Federal de Campina Grande, 2015. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1040.

Full text

Abstract:

Submitted by Emanuel Varela Cardoso (emanuel.varela@ufcg.edu.br) on 2018-06-25T21:56:30Z No. of bitstreams: 1 MIRELE COSTA DA SILVA – TESE (UAEMa) 2015.pdf: 9764394 bytes, checksum: a51abce77e60acf4e1faa93511e08be8 (MD5)<br>Made available in DSpace on 2018-06-25T21:56:30Z (GMT). No. of bitstreams: 1 MIRELE COSTA DA SILVA – TESE (UAEMa) 2015.pdf: 9764394 bytes, checksum: a51abce77e60acf4e1faa93511e08be8 (MD5) Previous issue date: 2015-08-28<br>Capes<br>As membranas cerâmicas anisotrópicas obtidas a partir de pós sintéticos estão ampliando suas aplicações industriais, devido p

APA, Harvard, Vancouver, ISO, and other styles

13

Medugno, Cláudia Conti. "Fases de membranas fluidas -L3 a partir de lipídio sintético e pentanol na região diluída - e o respectivo dialisado." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266692.

Full text

Abstract:

Orientador: Elias Basile Tambourgi<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-21T02:38:39Z (GMT). No. of bitstreams: 1 Medugno_ClaudiaConti_D.pdf: 3413427 bytes, checksum: 721bb3035fab10b9b0a1619381a0b4e0 (MD5) Previous issue date: 2012<br>Resumo: A fase L3 (esponja) foi observada no final dos anos 80 e representa uma nova classe de auto moldagem para sistemas surfactantes em água. Esse trabalho descreve a descoberta e a posterior caracterização de uma fase ternária composta do lipídio sintético catiônico br

APA, Harvard, Vancouver, ISO, and other styles

14

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

15

Wessolowski, Axel. "Amphipathische Hexapeptide - Interaktion mit Membranen Amphipathic hexapeptides - interaction with membranes /." [S.l.] : [s.n.], 2004. http://www.diss.fu-berlin.de/2004/150/index.html.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Van, Volden Olivier. "Les membranes d'électrodialyse :propriétés physico-chimiques des membranes monofonctionnelles constituant les membranes bipolaires." Doctoral thesis, Universite Libre de Bruxelles, 2000. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211783.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

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.

Full text

Abstract:

<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

APA, Harvard, Vancouver, ISO, and other styles

18

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

19

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Guillot, Isabelle. "Les membranes d'hémodialyse : biocompatibilité et rétrofiltration." Bordeaux 2, 1996. http://www.theses.fr/1996BOR2P069.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Aziz, Mujahid. "The recovery of copper by tubular supported liquid membranes." Thesis, Cape Peninsula University of Technology, 2006. http://hdl.handle.net/20.500.11838/894.

Full text

Abstract:

Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, Cape Town, 2006<br>During recent years, the use of liquid membranes has gained general interest in the treatment of effiuents where solute concentrations are low and large volumes of solutions should be processed, and, if possible, without generating any secondary waste. Liquid membrane processes have been proposed as a clean technology, owing to their characteristics, i.e. high specificity, low energy and utilization. Two liquid membrane processes have been used in metal recovery, which are the liquid surfact

APA, Harvard, Vancouver, ISO, and other styles

23

Borgsmiller, Karen McNeal. "Synthetic membranes for chiral separations." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/11824.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Björnsson, Jonas. "Stretched Membranes." Licentiate thesis, Karlstad University, Faculty of Technology and Science, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-1581.

Full text

Abstract:

<p>This thesis deals with relativistic membranes and, in particular, a limit called stretched membranes. The thesis also considers the relation of membranes to the conjectured M-theory and string theory. The thesis is divided into two parts. One introductory part where I introduce areas which are of relevance for the second part.</p><p>The second part consists of the scientific papers.</p><p>In the first part I make a general introduction to string theory. Furthermore, I discuss different limits of membrane theory. Then, I make a short review of the different conjectures of M-theory and briefl

APA, Harvard, Vancouver, ISO, and other styles

25

Oldham, Alexis Jean. "Modulation of lipid domain formation in mixed model systems by proteins and peptides." View electronic thesis, 2008. http://dl.uncw.edu/etd/2008-1/r1/oldhama/alexisoldham.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Wagh, Priyesh Ashokrao. "SYNTHESIS OF BIOLOGICALLY-INSPIRED NANOFILTRATION MEMBRANES USING PROTECTED, MUTATED, AND SIMULATED AQUAPORINS." UKnowledge, 2018. https://uknowledge.uky.edu/cme_etds/92.

Full text

Abstract:

Gram-negative bacterial cells are surrounded by a cell membrane which protects the cell and controls the transport of nutrients and waste products in and out of the cells at a fast rate. This rapid transport of nutrients and wastes through the cell membrane is made possible by channel proteins called porins. Various types of porins present in the cell membrane have specific functions depending on their selectivity towards different nutrients, and channel proteins selective towards water are called aquaporins. These proteins restrict the passage of all entities except water molecules and they p

APA, Harvard, Vancouver, ISO, and other styles

27

Daoudi, Meriem. "Performances et durabilité des membranes alternatives aux membranes PFSA." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0011.

Full text

Abstract:

Le principal objectif de cette thèse est la recherche d'un compromis entre la durabilité, le coût et, à terme, la résistance à haute température des membranes ionomères utilisées dans les piles à combustible de type PEMFC (Proton Exchange Membrane Fuel Cell). À cet égard, le ionomère poly (éther éther cétone) sulfoné (sPEEK) a été choisi du fait de ses bonnes propriétés mécaniques et de sa tenue à haute température. Cependant, les membranes sPEEK offrent une faible stabilité chimique par rapport aux membranes PFSA (PerFluoroSulfonic Acid) de référence. Afin de lever ce verrou, deux approches o

APA, Harvard, Vancouver, ISO, and other styles

28

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

Find full text

APA, Harvard, Vancouver, ISO, and other styles

29

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

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

30

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

32

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Sorensen, E. Todd. "Cross-linkable polyimide blends for stable membranes." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/10086.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Ren, Bin. "Catalyst loaded porous membranes for environmental applications : Smart Membranes." Thesis, KTH, Materials Science and Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4619.

Full text

Abstract:

<p>This project involves the fabrication and testing of microporous, polymer membranes designed to remove minute amounts of toxic air pollutants such as formaldehyde from air streams. The hypothesis to be tested is that active, the silver contained within the porous polymer membranes results in high formaldehyde retention.</p><p>Monolayers consist of different sizes of sPS particles are assembled first on the silicon wafers by spin coating method and convective assembly method, respectively. Then each kind of monolayer with one dimension of sPS particles is deposited with a nanometer scaled si

APA, Harvard, Vancouver, ISO, and other styles

35

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

36

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Bighane, Neha. "Novel silica membranes for high temeprature gas separations." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43732.

Full text

Abstract:

Membrane materials for gas separations span a wide range including polymers, metals, ceramics and composites. Our aim is to create economical hydrothermally stable membranes that can provide high H₂-CO₂ separation at a temperature of 300 degree Celsius, for application in the water-gas shift reactor process. The present work describes the development of novel silica and silica-titania membranes from the controlled oxidative thermolysis of polydimethylsiloxane. The scope of this thesis is fabrication of membranes, material characterization and preliminary gas permeation tests (35-80 degree Cels

APA, Harvard, Vancouver, ISO, and other styles

38

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

40

Aubert-Mammou, Corinne. "Etude comparative des lipides de graines de quelques crucifères (colza, moutarde, sisymbre)." Toulouse, INPT, 1994. http://www.theses.fr/1994INPT010A.

Full text

Abstract:

Ce travail est consacre a l'etude de onze echantillons d'huiles de graines de cruciferes: colza, moutarde noire, moutarde blanche, et sisymbre. Les proportions relatives des sterols, 4-methylsterols et alcools triterpeniques contenus dans l'insaponifiable ont ete determinees par clhp. Les principaux sterols ont ete isoles et identifies par rmn du proton et du carbone 13. Un schema biosynthetique a ete propose. Les tocopherols ont ete analyses de facon qualitative et quantitative. Les acides gras ont ete analyses par cpg. Apres fractionnement par ccm argentique et clhp, certains acides gras min

APA, Harvard, Vancouver, ISO, and other styles

41

Stephens, Brian Dominic. "BIOCOMPOSITE PROTON EXCHANGE MEMBRANES*." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1147968573.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Hartshorn, Christopher M. "Studies of the molecular effects of a solid support upon lipid membranes and membrane bound proteins." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Dissertations/Fall2009/c_Hartshorn_101209.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

45

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

46

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

47

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

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

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

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.

Full text

Abstract:

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,

APA, Harvard, Vancouver, ISO, and other styles

50

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!