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Dissertations / Theses on the topic 'Asymmetrical flow field-flow fractionation'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Fraunhofer, Wolfgang. "Asymmetrical flow field-flow-fractionation in pharmaceutical analytics." Diss., lmu, 2003. http://nbn-resolving.de/urn:nbn:de:bvb:19-84503.

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2

Bruijnsvoort, Michel van. "Characterisation of polymers and particles by asymmetrical flow Field-Flow Fractionation." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2002. http://dare.uva.nl/document/61720.

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3

Nilsson, Mikael. "Ribosomes and subunits from Escherichia coli studied by asymmetrical flow field-flow fractionation." Lund : Technical Analytical Chemistry, Lund University, 1998. http://catalog.hathitrust.org/api/volumes/oclc/39761331.html.

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4

Ngaza, Nyashadzashe. "Thermal field-flow fractionation (Thermal FFF) and asymmetrical flow field-flow fractionation (AF4) as new tools for the analysis of block copolymers and their respective homopolymers." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95836.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Polystyrene-block-poly(ethylene oxide) (PS-b-PEO) copolymers contain a hydrophilic PEO block and a hydrophobic PS block. PS and PEO have different affinities for most organic solvents and as a result, the PS-b-PEO copolymers are difficult to characterize in solution. In order to achieve a complete characterization of their molecular heterogeneity different techniques have been used. Recently FFF has become a cutting edge technology for polymer analysis because it possesses a number of advantages over conventional SEC and other l

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Whitley, Annie R. "Method Development for Detecting and Characterizing Manufactured Silver Nanoparticles in Soil Pore Water Using Asymmetrical Flow Field-Flow Fractionation." UKnowledge, 2012. http://uknowledge.uky.edu/pss_etds/9.

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Recent advances in nanotechnology have led to the production of materials with nanoscale dimensions (nm) and properties distinctly different from their bulk (>100 nm) counterparts. With increased use, it is inevitable that nanomaterials will accumulate in the environment and there is concern that the novel properties of nanomaterials could result in detrimental environmental and human health effects. In particular, there has been concern recently regarding the use of silver (Ag) based nanomaterials as antimicrobial agents in consumer and medical products. Current regulations dealing with the d

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6

Nagapetyan, Tigran [Verfasser], and Oleg [Akademischer Betreuer] Iliev. "Efficient algorithms for asymmetric flow field flow fractionation / Tigran Nagapetyan. Betreuer: Oleg Iliev." Kaiserslautern : Technische Universität Kaiserslautern, 2014. http://d-nb.info/1052020356/34.

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7

Juna, Shazia, and Anton Huber. "Translational diffusion coefficients and hydrodynamic radii of normal corn starch in aqueous media from asymmetrical flow field-flow fractionation experiments." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186242.

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Starch is a highly disperse material with broad distributions of molecular sizes and geometries. Its dissolution in aqueous media is difficult to achieve and it tends to form aggregates through both inter- and intra-molecular interactions. Asymmetrical flow field-flow fractionation (AF4) is a suitable technique for the separation of such macromolecular and colloidal systems. A major advantage of AF4 is the direct correlation of translational diffusion coefficients with retention time and experimental parameters. In this article, the hydrodynamic and diffusive mobility of normal corn starch dis

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Juna, Shazia, and Anton Huber. "Translational diffusion coefficients and hydrodynamic radii of normal corn starch in aqueous media from asymmetrical flow field-flow fractionation experiments." Diffusion fundamentals 15 (2011) 7, S. 1-8, 2011. https://ul.qucosa.de/id/qucosa%3A13843.

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Starch is a highly disperse material with broad distributions of molecular sizes and geometries. Its dissolution in aqueous media is difficult to achieve and it tends to form aggregates through both inter- and intra-molecular interactions. Asymmetrical flow field-flow fractionation (AF4) is a suitable technique for the separation of such macromolecular and colloidal systems. A major advantage of AF4 is the direct correlation of translational diffusion coefficients with retention time and experimental parameters. In this article, the hydrodynamic and diffusive mobility of normal corn starch dis

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9

Makan, Ashwell Craig. "Asymmetric flow field flow fractionation (AF4) of polymers with focus on polybutadienes and polyrotaxanes." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/19997.

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Thesis (MSc)-- Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Over the past two decades, field flow fractionation (FFF), as a polymer characterization technique, has become cutting edge technology. The demand for molar mass and size characterisation of complex polymer systems has increased, especially in cases where classical calibration techniques such as size exclusion chromatography (SEC) has shown several shortcomings. FFF is a technique resembling chromatography. It has several significant advantages over SEC, especially for the characterisation of ultrahigh molar mass (UHMM),

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10

Nguyen, Phuong Thanh. "Study of the aquatic dissolved organic matter from the Seine River catchment (France) by optical spectroscopy combined to asymmetrical flow field-flow fractionation." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0154/document.

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Le but principal de cette thèse était d'étudier les caractéristiques de la matière organique dissoute (MOD) dans le bassin versant de la Seine. Ce travail a été réalisé dans le cadre du programme de recherche PIREN-Seine. Les travaux présentés ici visaient plus particulièrement à identifier les sources de MOD et à suivre son évolution dans les zones d’étude. L’analyse des propriétés optiques (UV-Visible, fluorescence) de la MOD, couplée aux traitements PARAFAC et ACP, a permis de discriminer différentes sources de MOD et de mettre en évidence des variations spatio-temporelles de ses propriétés

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11

Ivaneev, Aleksandr. "Utilisation complémentaire des techniques de fractionnement flux-force asymétrique et en colonne tournante pour la caractérisation d'échantillons environnementaux de particules." Electronic Thesis or Diss., Pau, 2020. http://www.theses.fr/2020PAUU3035.

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Les particules environnementales, particulièrement nanoparticules (NP), présentent un risque potentiel pour la santé humaine et les écosystèmes en raison de leur ubiquité, de leurs caractéristiques et de leurs propriétés spécifiques. Plus particulièrement les NP ont une mobilité extrêmement élevée dans l'environnement, une capacité à associer, voire à concentrer des éléments toxiques et à pénétrer dans les organismes vivants. Les nanoparticules doivent donc être considérées avec une attention particulière dans les études environnementales. Néanmoins, l'étude des NP dans l'environnement demeure

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12

Kotouček, Jan. "Příprava a charakterizace komplexních nanočástic s využitím zejména frakcionace v tokovém poli a pokročilých spektroskopických metod." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-432947.

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Liposomes are versatile biocompatible and biodegradable carriers for a variety of medical applications. As the first nanoparticles, they have been approved for pharmaceutical use so far, and many liposome-based preparations are in clinical trials. Classical methods of liposome preparation represent potential limitations in technology transfer from laboratory to industrial scale. New, microfluidic techniques overcome these limitations and offer new possibilities for controlled, continuous preparation of liposomal particles in a laboratory and industrial scale. An important element in the develo

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13

Schmitt, Charlène Eva. "Caractérisation de polyacrylamide de hautes masses molaires par fractionnement couplage flux force couplée à la diffusion de la lumière." Thesis, Pau, 2015. http://www.theses.fr/2015PAUU3039.

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: L’une des méthodes qui consiste à optimiser la production d’hydrocarbure est basée sur l’injection d’eau, viscosifiée par addition de polymères de type polyacrylamides, afin d’améliorer l’extraction de pétrole (RAH). Or, les propriétés viscosifiantes des polymères dépendent de leurs masses molaires. L’enjeu de ce travail de thèse a donc été de mettre en place de nouvelles méthodes pour la détermination de larges distributions en masses molaires et de grande dispersité, caractéristiques propres aux échantillons d’intérêt industriel dans le domaine pétrolier. La stratégie d’analyse retenue rep

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14

António, Diana Sofia Conduto. "Detection and characterization of silver and titania nanomaterials in biological and environmental matrices." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/23762.

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Doutoramento em Biologia<br>A nanotecnolgia tem tido um impacto significativo em muitas áreas devido às peculiares propriedades dos nanomateriais (NM). O crescent uso de NM em diversos sectores da indústria veio aumentar a preocupação, a nível científico e legislativo, em desenvolver produtos mais benéficos mas com menor impacto ecológico. Uma das maiores limitações de ambos os sectores, científico e legislativo, é a capacidade de detectar e caracterizar NM. Diversas técnicas têm vindo a ser desenvolvidas durante as últimas décadas, mas a maioria apresenta limitações na capacidade de an

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15

Chen, Zhi. "Separation with electrical field-flow fractionation." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013788.

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16

Assemi, Shoeleh 1963. "Use of flow field-flow fractionation for the characterisation of humic substances." Monash University, Dept. of Chemistry, 2000. http://arrow.monash.edu.au/hdl/1959.1/9028.

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17

Edwards, Thayne Lowell. "Microfrabricated Acoustic and Thermal Field-Flow Fractionation Systems." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/6981.

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Arguments for miniaturization of a thermal field-flow fractionation system ( and #956;-ThFFF) and fabrication of a micro-scale acoustic field-flow fractionation system ( and #956;-AcFFF) using similar methods was presented. Motivation for miniaturization of ThFFF systems was established by examining the geometrical scaling of the fundamental ThFFF theory. Miniaturization of conventional macro-scale ThFFF systems was made possible through utilization of micromachining technologies. Fabrication of the and #956;-ThFFF system was discussed in detail. The and #956;-ThFFF system was characteri

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18

Bergström, Jonas. "Flow Field and Fibre Fractionation Studies in Hydrocyclones." Doctoral thesis, KTH, Fiber- och polymerteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4175.

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Hydrocyclones can be used to fractionate fibres according to their papermaking potential. The obtained fractions typically differ in fibre wall thickness and/or degree of fibre treatment. Despite a multitude of potential application scenarios, the process has so far had little commercial success. This is largely explained by the low fractionation efficiency and unfavourable operating characteristics of the process. The fractionation efficiency of a hydrocyclone is closely related to its flow field. The influence of pulp concentration on the tangential velocity field was therefore studied, by u

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Bergström, Jonas. "Flow field and fibre fractionation studies in hydrocyclones /." Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4175.

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20

Gimbert, Laura Jane. "Phosphorus speciation in soil leachate using field-flow fractionation and flow injection analysis." Thesis, University of Plymouth, 2005. http://hdl.handle.net/10026.1/1916.

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Colloidal material (0.001 - 1 um) in soil leachate and agricultural drainage waters is an important route for the transport of contaminants such as phosphorus from land to catchments. Excessive phosphorus concentrations can result in eutrophication of natural waters. To be able to characterise the colloidal material, in terms of size distribution, a mild and relatively new separation technique field-flow fractionation (FFF) can be used to fractionate complex colloidal samples. By combining FFF and flow injection analysis (FIA) more detailed physico-chemical information on phosphorus species in

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21

Parot, Jeremie. "Développement méthodologique du fractionnement par couplage flux / force (AF4) et spectroscopie optique pour l'étude de la matière organique dissoute aquatique : application aux estuaires de Seine et de Gironde." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0363/document.

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La matière organique dissoute (MOD) est constituée d’un mélange hétérogène et complexe de molécules. Elle intervient dans de nombreux processus physiques, biologiques et chimiques dans les milieux aquatiques, et notamment dans les grands cycles biogéochimiques ou le transport et la biodisponibilité des contaminants.Ainsi un des enjeux actuels de nombreux domaines de recherche (chimie, écologie, océanographie) est de mieux comprendre et caractériser la MOD dans l’environnement. Dans ce contexte-là, l’objectif de ces travaux a été le développement d’une méthodologie analytique pour l’analyse et

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22

Till, Ugo Valentin. "Oncopol - Vers le développement critique de vecteurs polymères pour l'oncologie." Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0065/document.

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L’objectif de cette thèse était de mettre au point une analyse critique de vecteurs polymères utilisés pour la thérapie photodynamique (PDT) et de faire le lien avec l’efficacité thérapeutique observée. Pour cela, une analyse complète des vecteurs a été réalisée par des techniques classiques comme la diffusion dynamique de la lumière ou la microscopie électronique, mais aussi grâce au fractionnement flux-force, technique peu utilisée jusqu’à présent dans le domaine des auto-assemblages polymères. Dans un deuxième temps, les auto-assemblages ont été utilisés comme vecteurs d’un photosensibilisa

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23

Jones, Neil. "Particle and polymer analysis by field flow fractionation : the application of field flow fractionation - multi-angle light scattering techniques to the analysis of industrially relevant samples." Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418763.

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24

Borghi, Francesco <1984&gt. "Flow Field–Flow Fractionation for size analysis and characterization of nanoparticles for applications in Life Sciences." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6446/.

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Nanotechnologies are rapidly expanding because of the opportunities that the new materials offer in many areas such as the manufacturing industry, food production, processing and preservation, and in the pharmaceutical and cosmetic industry. Size distribution of the nanoparticles determines their properties and is a fundamental parameter that needs to be monitored from the small-scale synthesis up to the bulk production and quality control of nanotech products on the market. A consequence of the increasing number of applications of nanomaterial is that the EU regulatory authorities are introdu

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25

Boye, Susanne. "Moderne Fraktioniermethoden zur Charakterisierung von verzweigten Polymeren." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-107514.

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Die Charakterisierung von verzweigten Polymeren stellt eine große Herausforderung dar. In dieser Arbeit wurden zum einen die Asymmetrische Fluss-Feldflussfraktionierung (AF4) als Alternative zur Größenausschlusschromatographie angewandt, um dendritische Polymere zu charakterisieren. Dabei wurden erstmals auch Komplexierungs-und Aggregationsstudien von dendritischen Glykopolymeren durchgeführt. Weiterhin ist es mittels Adaption der Phasenverteilungschromatographie gelungen, in Abhängigkeit des Verzweigungscharakters aufzutrennen. Hierbei konnten lineare und sternförmige Polystyrenproben separie

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26

Jochem, Aljosha-Rakim [Verfasser], and Tobias [Akademischer Betreuer] Kraus. "Reference particles for field-flow fractionation / Aljosha-Rakim Jochem ; Betreuer: Tobias Kraus." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2017. http://d-nb.info/1142919773/34.

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27

Tanase, Otilia Maya <1982&gt. "Development and applications of hollow fiber flow field-flow fractionation in the bioanalytical field. Studies of aggregation phenomena in complex protein samples." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6277/.

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Recent advances in the fast growing area of therapeutic/diagnostic proteins and antibodies - novel and highly specific drugs - as well as the progress in the field of functional proteomics regarding the correlation between the aggregation of damaged proteins and (immuno) senescence or aging-related pathologies, underline the need for adequate analytical methods for the detection, separation, characterization and quantification of protein aggregates, regardless of the their origin or formation mechanism. Hollow fiber flow field-flow fractionation (HF5), the miniaturized version of FlowFFF and

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28

Zhu, Yan. "TRANSMISSION ELECTRON MICROSCOPY AND FLOW FIELD-FLOW FRACTIONATION: EXPLORATION OF THE NANOSCOPIC COMPONENTS IN PARTIALLY REDUCED POLYOXOMOLYBDATES BY KINETIC PRECIPITATION WITH DE NOVO ORGANIC MOLECULES." Lexington, Ky. : [University of Kentucky Libraries], 2003. http://lib.uky.edu/ETD/ukychem2003d00119/YanZhuPHDthesis.pdf.

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Thesis (Ph. D.)--University of Kentucky, 2003.<br>Title from document title page (viewed June 30, 2004). Document formatted into pages; contains xv, 150 p. : ill. Includes abstract and vita. Includes bibliographical references (p. 140-148).

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29

Mes, Eduardus Petrus Cornelis. "Thermal Field-Flow Fractionation of polymeric and particulate materials: applications and fundamental aspects." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2002. http://dare.uva.nl/document/66330.

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30

Chen, Zhi. "DNA separation and sequencing by electric field-flow fractionation (EFFF) in a microchannel." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0001057.

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31

Kassab, James. "Sedimentation Field Flow Fractionation for the characterization of colloidal and micron particulate species." Limoges, 2004. http://aurore.unilim.fr/theses/nxfile/default/91a0881d-ac85-4ae1-8501-1d4c72bae67e/blobholder:0/2004LIMO330B.pdf.

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The particle separation in field flow fractionation (FFF) is based on the combined action of a carrier liquid flowing through a thin, ribbonlike channel and an external field applied perpendicularly to the channel. The particle size range that can be separated is very broad ranging from a few nanometers to 100 µm, covering the entire colloidal, polymeric and even most of the micron particle domain. Sedimentation field flow fractionation (SdFFF) operating at multi gravitational field is the separating technique used in this research work. This thesis describes the further evaluation and develop

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Carpino, Francesca. "Quadrupole Magnetic Field-Flow Fractionation: A Novel Technique For The Characterization Of Magnetic Particles." Cleveland, Ohio : Cleveland State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1207595560.

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Thesis (Ph.D.)--Cleveland State University, 2008.<br>Abstract. Title from PDF t.p. (viewed on May 8, 2008). Includes bibliographical references (p. 121-126). Available online via the OhioLINK ETD Center. Also available in print.

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33

Graff, Mason R. "Micromachined Electrical Field-flow Fractionation Systems with On-column Electrical and Resonance Light Scattering Detection Modalities." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/10426.

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The objective of this research was to develop efficient, non-invasive separation systems for various biological and non-biological substances. One of the major technological pushes in modern bioanalysis instrumentation development is the realization of efficient, miniaturized bioanalysis systems. In this work, three sizes of micromachined electrical field-flow fractionation (m-ElFFF) systems, with complementary on-column electrical and optical detection modalities were fabricated to achieve this objective. Field-flow fractionation (FFF) technology is capable of fractionating (or separating)

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34

Lao, Ieng Kin. "Mechanistic and experimental investigations of pulsed electric field flow fractionation micro device and its applications for nanoparticle and biomolecule separation /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CENG%202004%20LAO.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2004.<br>Accompanying CD-ROM contains supporting information on avi formated video clips. Includes bibliographical references (leaves 172-183). Also available in electronic version. Access restricted to campus users.

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SCHUNK, TIMOTHY CHARLES. "CHEMICAL INTERACTIONS AT THE SOLID-LIQUID INTERFACE: INVESTIGATIONS EMPLOYING DIAGNOSTIC SEPARATIONS (HPLC, METAL OXIDE, FIELD FLOW FRACTIONATION)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/188099.

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Significant advances in the understanding of chemical interactions at the solid-liquid interface have been made in this research through the use of diagnostic separations as a surface analysis technique. Diagnostic liquid chromatography has been employed in a detailed investigation of the thermodynamic and kinetic quantities which describe the interactions associated with a temperature induced conformational change in the octadecyldimethylsilane moieties of two different bonded silica materials. As a result of this study the nature of the structure and interactions of the ∼20Å thick interfacia

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36

Geisler, Martin [Verfasser], Brigitte [Gutachter] Voit, Brigitte [Akademischer Betreuer] Voit, Albena [Akademischer Betreuer] Lederer, and Harald [Gutachter] Pasch. "Topology and Thermophoresis Characterization of Complex Polymers by Thermal Field-Flow Fractionation / Martin Geisler ; Gutachter: Brigitte Voit, Harald Pasch ; Brigitte Voit, Albena Lederer." Dresden : Technische Universität Dresden, 2021. http://d-nb.info/1234238934/34.

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Plathe, Kelly Lee. "Nanoparticle - Heavy Metal Associations in Riverbed Sediments." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/26229.

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Relationships between trace metals and nanoparticles were investigated using analytical transmission electron microscopy (aTEM) and asymmetric flow field flow fractionation (aFlFFF) coupled to both multi-angle laser light scattering (MALLS) and high resolution-inductively coupled plasma mass spectroscopy (HR-ICPMS). Riverbed sediment samples were taken from the Clark Fork River in Montana, USA where a large-scale dam removal project has released reservoir sediment contaminated with toxic trace metals (namely Pb, Zn, Cu and As) which accumulated from one and a half centuries of mining activiti

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Li, Nigel. "A study of the kinetic interactions of complex metal ion : humic and magnetite ternary systems." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/a-study-of-the-kinetic-interactions-of-complex-metal-ion--humic-and-magnetite-ternary-systems(a3666dd0-eeee-47fe-90c9-a80925da2f7a).html.

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The sorption of humic acid (HA) and HA size fractions onto magnetite has been studied. There is considerable irreversibility in the interaction of the humic with the magnetite surface, but the presence of Eu3+ ions has no effect on the sorption of humic onto magnetite. The magnitude of the sorption to magnetite increases with HA fraction size for all ionic strengths between 0.01 and 3 mol dm-3. Increasing ionic strength also increases sorption. Asymmetric Flow Field Flow Fractionation analysis of HA sorption to magnetite after 1 day revealed preferential sorption of lower molecular weight mate

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Fukuda, Jun. "Studies on development of analytical methods to quantify protein aggregates and prediction of soluble/insoluble aggregate-formation." Kyoto University, 2015. http://hdl.handle.net/2433/199349.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第19025号<br>農博第2103号<br>新制||農||1030(附属図書館)<br>学位論文||H27||N4907(農学部図書室)<br>31976<br>京都大学大学院農学研究科応用生命科学専攻<br>(主査)教授加納健司, 教授植田和光, 教授植田充美<br>学位規則第4条第1項該当

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Shendruk, Tyler. "Theoretical and Computational Studies of Hydrodynamics-based Separation of Particles and Polymers in Microfluidic Channels." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30423.

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The advent of microfluidic technology presents many difficulties but also many opportunities for separation science. Leveraging the potential of micro- and nanofluidic geometries is not only a matter of shrinking systems. Miniaturization can shift the relative importance of physical phenomena leading to separation. Theoretical and computational studies into the consequences of miniaturization are vital. Mesoscopic, multi-particle collision dynamics simulations are performed on polyelectrolytes and hard, colloidal solutes. Multiple variations of this simulation algorithm are implemented to ach

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Fromell, Karin. "Nanoscale Reaction Systems." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8249.

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42

Rbii, Khalid. "Formation d’agrégats de hauts poids moléculaires dans la gélatine et comportement en solution aqueuse." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0124/document.

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La gélatine est un ingrédient utilisé dans de nombreuses industries et sa solubilité influence beaucoup ses propriétés fonctionnelles. Des défauts de solubilité sont parfois constatés, notamment suite à un stockage de la gélatine en grains à température élevée et humidité importante. Cette perte de solubilité pourrait être due à la présence de molécules de haut poids moléculaire. L'objectif de ce travail est d’apporter des éléments de compréhension sur la perte de solubilité observée dans les solutions de gélatine. L'utilisation d’une technique de Fractionnement par Flux-Force couplée à une di

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Lemke, Karina. "Abtrennung und Charakterisierung von Polyelektrolyt-modifizierten Nanopartikeln." Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2013/6813/.

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Gegenstand der Dissertation ist die größen- und eigenschaftsoptimierte Synthese und Charakterisierung von anorganischen Nanopartikeln in einer geeigneten Polyelektrolytmodifizierten Mikroemulsion. Das Hauptziel bildet dabei die Auswahl einer geeigneten Mikroemulsion, zur Synthese von kleinen, stabilen, reproduzierbaren Nanopartikeln mit besonderen Eigenschaften. Die vorliegende Arbeit wurde in zwei Haupteile gegliedert. Der erste Teil befasst sich mit der Einmischung von unterschiedlichen Polykationen (lineares Poly (diallyldimethylammoniumchlorid) (PDADMAC) und verzweigtes Poly (ethylenimi

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Thepchalerm, Chalao. "Influence of Hevea brasiliensis latex compartments on the storage hardening of natural rubber : study of the mesostructure by AF4-MALS and of the mineral element composition by ICP-MS." Thesis, Montpellier, SupAgro, 2014. http://www.theses.fr/2014NSAM0016/document.

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Le but de la présente étude était de vérifier l'influence de deux compartiments du latex d'Hevea brasiliensis, les lutoïdes et le sérum C, sur le durcissement au stockage et sur la mésostructure du caoutchouc naturel (NR). L'implication des composants minéraux du latex a fait l'objet d'un focus spécial. La mésostructure du NR a été étudié par fractionnement par couplage flux-force à flux asymétrique couplé à un détecteur à diffusion de lumière multiangulaire (AF4-MALS) et par chromatographie d'exclusion de tailles équipée d'un détecteur de diffusion de lumière multiangulaire (SEC- MALS). La sp

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Jönsson, Mats. "Microfluidic Devices for Manipulation and Detection of Beads and Biomolecules." Doctoral thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6746.

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This thesis summarises work towards a Lab-on-Chip (LOC). The request for faster and more efficient chemical and biological analysis is the motivation behind the development of the LOC-concept. Microfluidic devices tend to become increasingly complex in order to include, e.g. sample delivery, manipulation, and detection, in one chip. The urge for smart and simple design of robust and low-cost microdevices is addressed and discussed. Design, fabrication and characterization of such microdevices have been demonstrated using low-cost polymer and glass microfabrication methods. The manufacturing is

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Harguindéguy, Stéphanie. "Transport de l’uranium dans les eaux et le sol : approche combinée colloïdale et isotopique." Thesis, Pau, 2013. http://www.theses.fr/2013PAUU3043/document.

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Les mécanismes d’interactions entre uranium et colloïdes ont été étudiés à partir d’échantillons provenant d’un site d’intérêt pour le Commissariat à l’Energie Atomique (CEA). La mobilisation de l’uranium depuis les sols a été appréhendée par lixiviations statique et dynamique. Le transfert et le transport ont été investis en considérant les eaux de nappe et de surface (drain). Les résultats confirment que l’uranium anthropique est plus mobile que l’uranium naturel. Le comportement (mobilisation, distribution) de l’uranium ne diffère cependant pas selon son origine. La phase colloïdale joue un

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Zubal, Lukáš. "Zpracování, gelace a charakterizace atelokolagenu." Doctoral thesis, Vysoké učení technické v Brně. CEITEC VUT, 2018. http://www.nusl.cz/ntk/nusl-385280.

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Předkládaná disertační práce se zabývá charakterizací, zpracováním a gelací rozpustného kolagenu. Literární rešerše shrnuje postavení kolagenu na trhu s transplantáty, jeho aplikace a jednotlivé typy kolagenu. Detailně jsou rozebrány jednotlivé metody charakterizace rozpustného kolagenu a způsoby jeho gelace. Experimentální část je rozdělena na dvě podkapitoly. První podkapitola experimentální části se zabývá rozpouštěním a gelací rozpustného kolagenu v natlakované CO2 atmosféře. Proti jiným podobným metodám, metoda pracuje na poměrně nízkém tlaku (do 0.9MPa) a je bezpečná z pohledu denaturace

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Raak, Norbert, Raffaele Andrea Abbate, Albena Lederer, Harald Rohm, and Doris Jaros. "Size Separation Techniques for the Characterisation of Cross-Linked Casein: A Review of Methods and Their Applications." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-234862.

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Casein is the major protein fraction in milk, and its cross-linking has been a topic of scientific interest for many years. Enzymatic cross-linking has huge potential to modify relevant techno-functional properties of casein, whereas non-enzymatic cross-linking occurs naturally during the storage and processing of milk and dairy products. Two size separation techniques were applied for characterisation of these reactions: gel electrophoresis and size exclusion chromatography. This review summarises their separation principles and discusses the outcome of studies on cross-linked casein from the

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Sötebier, Carina Anna. "Charakterisierung von Silber-Nanopartikeln mit der Feldflussfraktionierung, Hochdruckflüssigkeitschromatographie und der induktiv gekoppelten Plasma-Massenspektrometrie." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2017. http://dx.doi.org/10.18452/17743.

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Im Rahmen dieser Arbeit wurden vier verschiedene Methoden zur Separation, Identifikation sowie Quantifizierung von Silber-Nanopartikeln (Ag-NP) entwickelt. Mittels asymmetrischer Fluss-Feldflussfraktionierung (AF4) in Kombination mit einem induktiv gekoppelten Plasma-Massenspektrometer (ICP-MS) konnten eine gute Trennung und hohe Wiederfindungsraten gefunden werden. Eine systematische Studie möglicher Probenverluste während der Methodenoptimierung zeigte, dass der größte Verlust durch die Ag+-Ionen verursacht wurde, während Verluste durch Ablagerungen auf der Membran vernachlässigbar waren. Fü

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Fraunhofer, Wolfgang [Verfasser]. "Asymmetrical flow field-flow-fractionation in pharmaceutical analytics : investigations in aggregation tendencies of pharmaceutical antibodies / vorgelegt von Wolfgang Fraunhofer." 2003. http://d-nb.info/988894556/34.

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