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Tesis sobre el tema "Gels and Hydrogels"

Autor: Grafiati
Publicado: 23 de noviembre de 2024
Última modificación: 31 de julio de 2025

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1

Vaculíková, Hana. "Hyaluronan hydrogels." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401877.

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In this thesis there was preparation optimized for agarose-gelatin hydrogels with addition of various concentrations of low-molecular and high-molecular hyaluronan and than there were examined viscoelastic properties of them by rheological oscilation tests and high-resolution ultrasonic spektrometry. By rheology were measured values of elastic and viscous modulus for selected amplitude of strain, oscilation frequencies and temperatures. In the second method there were recorded values of ultrasonic velocities of samples at temperature scanning from 85 to 25 °C and from 25 to 85 °C in HR-US 102,
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2

Shukla, Pranav. "Inducing Liquid Evaporation with Hygroscopic Gels." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/101555.

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Mammals secrete fluids from the sweat glands known as perspiration which helps in thermoregulation. However, sweat can interfere with vision, comfort, grip, and results in malodor due to bacterial action. To combat the aforementioned issues, antiperspirants are widely used personal hygiene products to stop the sweat by blocking the sweat glands. Typically, aluminum salts present in the antiperspirants dissolve in the sweat and create a temporary plug to cut the flow of sweat. However, there has been a long debate going on the safety concerns of aluminum-based antiperspirants. Although there is
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3

Park, Tae Gwan. "Immobilized biocatalysts in stimuli-sensitive hydrogels /." Thesis, Connect to this title online; UW restricted, 1990. http://hdl.handle.net/1773/8070.

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4

Rehab, M. M. A. M. "Preparation and characterization of copolymeric hydrogels." Thesis, University of Salford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381697.

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5

Gräfe, David. "Tetra-Responsive Grafted Hydrogels for Flow Control in Microfluidics." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-219926.

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Microfluidics covers the science of manipulating small quantities of fluids using microscale devices with great potential in analysis, multiplexing, automation and high-throughput screening. Compared to conventional systems, microfluidics benefits from miniaturization resulting in shortened time of experiments, decreased sample and reagent consumptions as well as reduced overall costs. For microfluidic devices where further weight and cost reduction is additionally required, stimuli-responsive hydrogels are particularly interesting materials since they can convert an environmental stimulus dir
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6

Singh, Nishant. "Functional gels as microreactors." Doctoral thesis, Universitat Jaume I, 2016. http://hdl.handle.net/10803/397698.

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Functionalized Hydrogels upon self-assembly demonslrate enzyme like catalysis owing to the formatin of hydrophobic pockets, increased local concentration of the catalytic sites, pKa change, pH shift etc. Here we present such hydrogelators being able to demonstrate enhanced catalysis for a range of reactions such as aldol, mannich, ester hydrolysis, deacetalisation etc.<br>Hidrogelantes funcionalizados sobre autoensamblaje pueden demostrar como la catálisis enzimática mejorada basada en varios factores tales como bolsillos hidrofóbicos, cambio en pH, cambio en pKa, aumento en la concentració
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7

Mujeeb, Ayeesha. "Self-assembled octapeptide gels for cartilage repair." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/selfassembled-octapeptide-gels-for-cartilage-repair(ce161da3-4ce4-4d42-b0cc-6933fc6aa394).html.

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Molecular self-assembly provides a simple and efficient route of constructing well-defined nanostructures which may serve as extra cellular matrix (ECM) mimics. This work focuses on two specific octapeptides: FEFEFKFK and FEFKFEFK (F: phenylalanine, E: glutamic acid, K: lysine) with alternating charge distribution. The peptides were shown to self-assemble in solution and form β-sheet rich nanofibres which, above a critical gelation concentration (CGC), entangle to form self-supporting hydrogels. The fibre morphology of the hydrogels was analysed using TEM and Cryo-SEM illustrating the dense fi
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8

Buerkle, Lauren Elizabeth. "Tailoring the Properties of Supramolecular Gels." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1317946752.

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9

Gruberová, Eliška. "Gelace hydrofobizovaného hyaluronanu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449414.

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This diploma thesis deals with hyaluronan modified by palmitoyl and its gelation. Gels were created from palmitoyl hyaluronan with molecular weight 216 kDa and degree of substitution 11 % in concentrations 15 and 20 g dm-3 in water and concentrations 10, 15, 20 g dm-3 in NaCl and TSB. Also gel from palmitoyl hyaluronan with molecular weight 35 kDa and degree of substitution 10 % in concentrations 20, 30 g dm-3 in NaCl was created. Gels were investigated concerning medical applications. Gels were rigid and had very good properties, which was confirmed by rheology. The physical properties (pH
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10

Le, blay Heiva. "Use of shear wave imaging to assess the mechanical and fracture behaviors of tough model gels." Electronic Thesis or Diss., Université Paris sciences et lettres, 2021. http://www.theses.fr/2021UPSLS096.

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Un hydrogel est un matériau mou, largement gonflé d’eau, rendu élastique via un réseau de chaînes de polymère. Un gel est intrinsèquement fragile. On peut remédier à cette fragilité grâce à l’ajout de liaisons sacrificielles dynamiques. L’ingénierie macromoléculaire a permis au XXIème siècle de formuler des gels à destination de la biologie afin de proposer des matériaux de synthèse tout en remédiant aux problèmes de biocompatibilité, à la compatibilité des interfaces tissu/matériau et des propriétés mécaniques dont le corps a besoin. Pourtant, la fracture de ces matériaux hautement déformable
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11

Silencieux, Fanny. "Hydrogels paramagnétiques pour applications en imagerie par résonance magnétique." Doctoral thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/27617.

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Les hydrogels sont des polymères de plus en plus utilisés dans le domaine des biomatériaux. À cause de leur faible différence de densité avec le milieu environnant, ils sont difficiles à visualiser en imagerie par résonnance magnétique (IRM). Des agents de contraste sont couramment utilisés pour faciliter la distinction entre les tissus pendant la visualisation en IRM. L'objectif de ce projet de thèse est donc de développer un agent de contraste paramagnétique et de l'encapsuler dans des hydrogels afin d'en permettre la visualisation en IRM. Des nanoparticules de silice mésoporeuses (MSN) ont
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12

Nicoll, Sarah Louise. "Covalently-linked self-assembling peptide-amphiphile hydrogels for cell scaffolding applications." Thesis, University of Aberdeen, 2012. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=186975.

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A variety of “clickable” self-assembling peptide-amphiphile hydrogel systems are reported. Covalently linked hydrogels were prepared using alkyne-azide “click” chemistry and thiolene photochemistry, which were used in combination with short self-assembling peptideamphiphile compounds. For alkyne-azide “click” hydrogels, samples were formed from a mixture of two peptideamphiphiles which were separately disubstituted with alkyne or azide functionalised amino acids. This allowed for production of an extensively triazole-linked hydrogel product when gelation was performed in combination with the a
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13

Stirner, Manuela [Verfasser], and Josef [Akademischer Betreuer] Breu. "Clay linked Gels : Mechanical Enhancement of Hydrogels by Incorporation of Clay Minerals / Manuela Stirner. Betreuer: Josef Breu." Bayreuth : Universität Bayreuth, 2014. http://d-nb.info/1095663593/34.

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14

Topuz, Fuat [Verfasser], Martin [Akademischer Betreuer] Möller, and Jürgen [Akademischer Betreuer] Groll. "Functional star-type polyethylene glycol copolymers for hydrogels and biohybrid gels / Fuat Topuz ; Martin Möller, Jürgen Groll." Aachen : Universitätsbibliothek der RWTH Aachen, 2015. http://d-nb.info/1127232029/34.

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15

Daou, Dania. "Intégration de moteurs moléculaires photoactivables dans des gels supramoléculaires." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAF021.

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Cette thèse a exploré l'intégration de moteurs moléculaires synthétiques photoactivables dans des réseaux de gels supramoléculaires. L'objectif principal était d'obtenir un mouvement macroscopique réversible en exploitant à la fois la rotation unidirectionnelle des moteurs moléculaires et la nature réversible des interactions supramoléculaires. Des moteurs moléculaires hautement fonctionnalisés ont été synthétisés et intégrés comme unités de réticulation dans des réseaux de gel supramoléculaire de peptides de diphénylalanine et de poly(γ-benzyl-L-glutamate) et d'oligonucléotides d'ADN. L'activ
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16

Roux, Rémi. "Élaboration d'assemblages colloïdaux à partir de nanoparticules de poly(acide lactique) et de chitosane." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10088/document.

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Les assemblages colloïdaux représentent une nouvelle piste très prometteuse dans le domaine de l'ingénierie tissulaire. Idéalement, ce type d'assemblage permet l'obtention de matériaux injectables et gélifiants sur le site lésionnel, favorisant par la suite le développement de néo-tissus viables. Ce travail porte sur la formation de tels assemblages à base de chitosane et de poly(acide lactique) (PLA). Deux types d'assemblages ont été conçus et étudiés dans ce travail. Dans une première approche, le mélange de particules anioniques de poly (acide lactique) (PLA) avec du chitosane en solution f
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17

Belal, Khaled. "Hydrogels stimulables à base de complexes de cyclobis paraquat paraphénylène." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10108/document.

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Les matériaux polymères multi stimulables sont d’ores et déjà utilisés dans différents domaines d’applications, tels que le relargage de principes actifs sur commande, l’ingénierie tissulaire, les matériaux auto réparants ou les senseurs. Depuis une vingtaine d’années, la chimie supramoléculaire s’est révélée être un outil de choix pour créer ce type de matériaux dits « intelligents ». Elle permet en effet de moduler voir de programmer les propriétés des matériaux en contrôlant le caractère dynamique des interactions supramoléculaires via l’application de stimuli adaptés. Les travaux réalisés
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18

BAZZI, AUREA de S. "Estudo da interacao quimica do poli(dimetilsiloxano-g-oxido de etileno) na membrana de poli(N-vinil-2-pirrolidona) e agar induzida com radiacao ionizante." reponame:Repositório Institucional do IPEN, 1999. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10735.

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Made available in DSpace on 2014-10-09T12:43:27Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:09:46Z (GMT). No. of bitstreams: 1 06632.pdf: 4097419 bytes, checksum: 1cde4c2787112f93fcca894974c568fd (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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19

You, Therese. "Negative energy elasticity and a model for the behavior of the residual strain in doubly cross-linked gels fabricated by shear strain." Thesis, Uppsala universitet, Polymerkemi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-420125.

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Doubly cross-linked gels were fabricated based on tetra-poly(ethylene glycol) (Tetra-PEG) by shear strain. These are gels with two network structures present in the same polymeric network. The second network structure is introduced by applying a mechanical field to the first natural network structure. These doubly cross-linked gels indicated a negative energy elasticity supporting earlier findings where the energy elasticity was found significantly negative for Tetra-PEG gel. Acquired results indicate implications for past research on the elasticity of polymer gels where the energy contributio
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20

Giraudon--Colas, Gaël. "Caractérisation multiéchelle d'assemblages d'hémoglobine : de l'adsorption sur les nanoparticules aux gels nanocomposites Protein−Nanoparticle Interactions: What Are the Protein−Corona Thickness and Organization? In Situ Analysis of Weakly Bound Proteins Reveals Molecular Basis of Soft Corona Formation." Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPASF011.

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Les gels de protéine nanocomposites sont un sujet encore peu développé dans la littérature malgré de nombreuses applications allant de l’immobilisation d’enzyme aux prothèses en passant par les gels alimentaires. La protéine permet d’assurer la biocompatibilité des gels tandis que l’ajout des nanoparticules a pour but de moduler les propriétés mécaniques des gels. Nous avons donc décidé de nous intéresser aux gels d’hémoglobine réticulée chimiquement et dopés aux nanoparticules. L’hémoglobine (Hb) a été choisie pour sa grande abondance et ses propriétés de fixation du dioxygène. Les gels seron
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21

Ribeiro, Cédric. "Assemblages (macro) moléculaires à base de complexe intra et/ou intermoléculaire de CBPQT4+, X-." Electronic Thesis or Diss., Centrale Lille Institut, 2023. http://www.theses.fr/2023CLIL0018.

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L’association de la science des polymères et de la chimie supramoléculaire a conduit au développement de matériaux polymères supramoléculaires dotés de propriétés structurelles, mécaniques et fonctionnelles atypiques. Ces matériaux sont d’ores et déjà exploités dans divers domaines d’applications, tels que les matériaux auto réparants,l’ingénieur tissulaire ou encore la libération contrôlée de principes actifs. Ainsi, la chimie supramoléculaire s’est avérée être un outil puissant pour moduler les propriétés des matériaux en contrôlant le caractère dynamique des interactions supramoléculaires v
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22

Lang, David. "Interakce huminových hydrogelů s měďnatými ionty." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-217019.

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This diploma thesis deals with humic acid gels and their ability to bind metallic ions on their surface. In the thesis, there was studied the adsorption of copper ions on the provided gels. The gels were prepared by dissolving the humic acid in sodium hydroxide or sodium tripolyphosphate and then precipitated with hydrochloric acid or metal chlorides. Adsorption was studied at different concentrations of the copper (II) chloride and measured on UV-VIS spectrophotometer. It was proved from measuring that gels made from sodium tripolyphosphate are adsorbing less copper ions than the ones prepare
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23

Pelánová, Markéta. "Termocitlivé polymerní gely." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-295707.

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The presented thesis on thermosensitive polymer gel is focused especially on a thermosensitive triblock copolymer, which is composed of hydrophobic polylactide, polyglycolid and hydrophilic polyethylene glycol (PLGA-PEG-PLGA). Thermosensitive copolymers are very attractive for their phase sol-gel transitions and gel-suspension transitions. The aqueous solution of this copolymer behaves like a sol at laboratory temperature and like a gel at body temperature. These systems are used as injectable carriers for targeted drug delivery with controlled release. However, the influence of the resulting
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24

Zainuddin. "Synthesis and calcification of hydrogel biomaterials /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18693.pdf.

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25

ABRAMI, MICHELA. "Biomedical gels: structure and properties." Doctoral thesis, Università degli Studi di Trieste, 2017. http://hdl.handle.net/11368/2908173.

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Biomedical hydrogels are defined as biocompatible solid-liquid systems in which polymeric chains (fibers) are crosslinked to form a 3D-network swollen by a huge water amount. Their use as controlled drug release systems is in continuous growth. However, a critical step in their development is the characterization of their 3D nano/micro structure and the correlation with fabrication parameters. Indeed, hydrogels structure is complex and depends on fibers diameter, concentration, mesh/pore size and degree of crosslinking. Historically, hydrogel structure have been imaged using AFM, SEM, TEM and
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26

Hellio, Serughetti Dominique. "Les gels physiques et chimiques de gelatine : structure et rhéologie." Paris 6, 2004. http://www.theses.fr/2004PA066461.

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27

Tang, Claire. "Self-assembled peptide gels for 3D cell culture." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/selfassembled-peptide-gels-for-3d-cell-culture(035b395c-ccaf-4874-b2dc-6330c33db1c5).html.

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Under specific conditions short peptides modified with an N-terminal fluorenyl-9-methoxycarbonyl (Fmoc) group can self-assemble into hydrogel scaffolds similar in properties to the natural extracellular matrix. Fmoc-diphenylalanine (Fmoc-FF) for instance, has been shown to form hydrogels at physiological pH that have the ability to support 2D and 3D cell culture. The aim of this investigation is to provide further understanding of the self-assembly mechanism of such systems in order to progress towards the establishment of design rules for the preparation of scaffolds with tuneable properties.
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28

Scott, Shane. "Rheological Properties of Protein Hydrogels." Thesis, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/20565.

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Certain hydrogel forming de novo proteins that utilize different crosslinking methods are studied experimentally on a rheometer. The stress reaxation modulus of CRC, a telechelic, triblock protein, is shown to be that of a stretched exponential function with a value of β ≅ 0.5. The insertion of an integrin binding domain and changes in pH within the range 6.5–8.5 are shown not to significantly affect the resulting rheological behavior. A selective chemical crosslinker is used on CRC hydrogel systems and is shown to change the rheological behavior of the system to that of a combination of a ch
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29

Andrei, Diana Cristina. "The deformation of microscopic gel particles." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244158.

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30

Matsumoto, Shinji. "Novel Stimuli-Responsive Supramolecular Hydrogels toward Sophisticated Nano-Micro Biomaterials." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/57282.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第13850号<br>工博第2954号<br>新制||工||1436(附属図書館)<br>26066<br>UT51-2008-C766<br>京都大学大学院工学研究科合成・生物化学専攻<br>(主査)教授 濵地 格, 教授 青山 安宏, 教授 木村 俊作<br>学位規則第4条第1項該当
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31

Lardy, François. "Hydrogels : contribution a l'etude de la fonctionnalite des hydrocolloides." Clermont-Ferrand 1, 2001. http://www.theses.fr/2001CLF1PP03.

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32

Wu, Xue Shen. "Synthesis of hydrogel-liposome composites and their application to controlled release of active agents /." Thesis, Connect to this title online; UW restricted, 1992. http://hdl.handle.net/1773/8081.

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33

Bergman, Kristoffer. "Hyaluronan Derivatives and Injectable Gels for Tissue Engineering." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9357.

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34

Chalal, Mohand. "Structure multi-échelle et propriétés physico-chimiques des gels de polymères thermosensibles." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00680076.

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La "cryopolymérisation" permet d'obtenir des gels de polymère macroporeux ou "cryogels". Cette méthode a été utilisée pour la synthèse d'hydrogels thermosensibles à base de pNIPA. La température critique TC correspondant à la transition de volume a été déterminée par des mesures de taux de gonflement et par DSC. La macroporosité (distribution de la taille des pores et épaisseur des parois) et son évolution en fonction de T ont été étudiées par la microscopie biphotonique donnant des informations à l'échelle du µm à plusieurs dizaines de µm. La diffusion de rayons X (SAXS et WAXS) a été utilisé
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35

Debnath, Dibyendu. "SYNTHESIS AND VISCOELASTIC PROPERTIES OF GELS OBTAINED FROM LINEAR AND BRANCHED POLYMERS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525400236218684.

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36

Echalier, Cécile. "Conception de matériaux hybrides peptidiques biomimétiques." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT213.

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Nous avons imaginé et développé une méthode pour la préparation d’hydrogels par procédé sol-gel à partir de blocs hybrides (bio)organiques-inorganiques. Les blocs hybrides sont obtenus par introduction de groupements silylés, triéthoxysilanes ou hydroxydiméthylsilanes, sur des polymères synthétiques ou des molécules d’intérêt biologique telles que des peptides. Ces blocs hybrides peuvent être combinés dans des proportions choisies pour former des hydrogels multifonctionnels. Le procédé de gélification se déroule à 37°C à pH 7.4 dans un tampon physiologique. L’hydrolyse et la condensation des p
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37

Montheil, Titouan. "Conception d’hydrogels hybrides pour la préparation de géloses synthétiques." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTS012.

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Des hydrogels hybrides ont été développés comme alternative aux hydrogels d’agar utilisés en microbiologie. Notre stratégie repose sur la fonctionnalisation de polymères avec des groupements triéthoxysilanes, puis leurs mises en jeu dans le procédé sol-gel afin de fabriquer un hydrogel hybride organique-inorganique. Ce procédé est bio-orthogonal et biocompatible. Il se déroule en milieu aqueux, à pH physiologique et température ambiante. Dans une première partie, nous avons développé des hydrogels à base de PEG bisilylé. Nous avons montré que l’incorporation de PEG monosilylé permettait un rel
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38

Debnath, Dibyendu Debnath. "SYNTHESIS AND VISCOELASTIC PROPERTIES OF GELS OBTAINED FROM LINEAR AND BRANCHED POLYMERS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1525398351097978.

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39

Santan, Harshal Diliprao. "Synthesis and characterization of thermosensitive hydrogels derived from polysaccharides." Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2014/6979/.

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In this work, thermosensitive hydrogels having tunable thermo-mechanical properties were synthesized. Generally the thermal transition of thermosensitive hydrogels is based on either a lower critical solution temperature (LCST) or critical micelle concentration/ temperature (CMC/ CMT). The temperature dependent transition from sol to gel with large volume change may be seen in the former type of thermosensitive hydrogels and is negligible in CMC/ CMT dependent systems. The change in volume leads to exclusion of water molecules, resulting in shrinking and stiffening of system above the transiti
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40

Valot, Laurine. "Development of multifonctional hybrid hydrogels for mesenchymal stem cell-based cartilage repair." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS074.

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Nous avons développé des hydrogels hybrides pour l’encapsulation de cellules souches mésenchymateuses dans la perspective de réparation du cartilage. Notre stratégie repose sur la fonctionnalisation de biopolymères et de molécules actives avec des groupements triéthoxysilanes afin de préparer des hydrogels par un procédé sol-gel. Ce procédé bio-orthogonal, se déroule dans l’eau, à pH physiologique et 37 °C. Dans un premier temps, nous avons mis au point un système de catalyseurs sol-gel biocompatible et étudié les paramètres influençant la cinétique de gélification. Dans un second temps, des p
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41

Nurgaziyeva, E. K., G. S. Tatykhanova, G. A. Mun, V. V. Khutoryanskiy, and S. E. Kudaibergenov. "Catalytic Properties of Gel-Immobilized Gold Nanoparticles in Decomposition Of Hydrogen Peroxide." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42525.

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This paper reports the study of hydrogen peroxide decomposition catalyzed by polymer-protected gold nanoparticles (AuNPs) immobilized within polyacrylamide hydrogel. The stabilization of AuNPs was achieved using hydrophilic polymers. Embedding of AuNPs stabilized with various polymers into polyacrylamide hydrogels was carried out using three ways: “in situ” polymerization, sorption and boronhydride methods. Size, shape and morphology of AuNPs were characterized by various physicochemical methods.
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42

Kovářová, Lenka. "Studium fyzikálních gelů s hydrofobními doménami." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216963.

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The thesis is focused on physical hyaluronan gels. The object of study is the interaction of hyaluronan (HyA) with oppositely charged surfactants in physiologic solution (0.15 M NaCl), leading to the formation of gel. In the first part of work have been determined the solids´ contents (X) in gels and their supernatants in percentage and their correlation with molecular weight concentration of original HyA solution and the ratio of binding sites on hyaluronan chain and surfactant CTAB. To conclude, decrease in HyA concentration results in higher values of X and vice versa. On the other hand, in
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43

Leichsenring, Peter, and Thomas Wallmersperger. "Modeling and simulation of transport phenomena in ionic gels." SPIE, 2015. https://tud.qucosa.de/id/qucosa%3A35028.

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Ionic hydrogels belong to the class of polyelectrolyte gels or ionic gels. Their ability to swell or shrink under different environmental conditions such as change of pH, ion concentration or temperature make them promising materials, e.g. for microsensoric or microactuatoric devices. The hydrogel swelling exhibits nonlinear effects due to the occurrence of different interacting transport phenomena. Numerical simulations are an essential part in the ongoing development of microsensors and microactuators. In order to determine transport effects due to diffusion, migration and convection a multi
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44

Gasmi, Sarah Nawel. "Action d'une hydrolase dans des hydrogels à base d'alginate et d'alginate fonctionnalisé." Rouen, 2015. http://www.theses.fr/2015ROUES049.

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L'objectif de ce travail a été d'étudier l'activité hydrolytique d'une enzyme, la pullulanase, vis à vis du pullulane dans des hydrogels fonctionnalisés ou non à base d'alginate de calcium. L'alginate a été modifié chimiquement par une polyéther amine de la famille Jeffamine® qui présente un caractère LCST "Low Critical Solubility Temperature". L'enzyme immobilisée à hauteur de 30% dans des billes d'alginate de calcium hydrolyse lentement le pullulane en raison de la pénétration de celui ci dans les billes et libère du maltotriose et ses premiers multiples alors que l'enzyme libre donne un mél
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45

Allcock, Bryan W. "Hydrogen concentration measurements using a gel-filled electrochemical probe." Thesis, Cranfield University, 1993. http://dspace.lib.cranfield.ac.uk/handle/1826/12140.

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A novel gel-filled electrochemical hydrogen probe was developed and used to measure hydrogen concentrations in carbon-manganese steels. The results were compared with those from an electrochemical permeation technique and a volumetric method. The probe was used to determine the distribution of hydrogen in 5mm steel plates cathodically charged on one side to represent the wall of a pipe or pressure vessel used in hydrogen service. The concentration measurements obtained by the three techniques were in good agreement with each other and with those predicted from diffusion equations and this perm
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46

Mao, Yunwei. "Coupled deformation-diffusion-fracture theories for solids : application to polymeric gels and hydrogen embrittlement in steels." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118722.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 207-216).<br>Solids with deformation-diffusion coupling are ubiquitous in engineering applications. Understanding and modeling the fracture of such solids is vitally important. This thesis addresses the theoretical formulation, numerical implementation, and application of fully-coupled deformation-diffusion-damage theories for two different classes of materials: (i) polymeric gels and (ii) hydrogen embrittlemen
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47

Benzeval, Ian. "Development of responsive polymers for drug delivery applications." Thesis, University of Bath, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500696.

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In this thesis, glucose responsive hydrogels based on cross-linked dextran molecules were studied to determine the diffusion rate of an insulin analogue. Investigations of the interaction between concanavalin A and dextran, both in free solution and in the form of glucose responsive hydrogels were conducted. The free solution results have shown that there is an increase of association constant between concanavalin A and dextran when the molecular mass of the dextran is increased. Free solution viscometric tests have shown that increasing the molecular mass or the concentration of the dextran i
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48

FINETTI, CHIARA. "NOVEL FUNCTIONAL HYDROPHILIC POLYMERS AND HYDROGELS FOR MICROANALYTICAL SYSTEMS." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/473212.

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This thesis focuses on the use of hydrophilic polymers for bioanalytical applications, including several microanalytical techniques encompassing nanotechnology, microarray technology and DNA gel electrophoresis. The dissertation is divided in two parts, which share the employment of dimethylacrylamide-based copolymers, developed at the laboratory of Analytical Microsystems of the Institute of Chemistry for Molecular Recognition (National Research Council of Italy) where the thesis has been carried out. PART A introduces a novel approach for surface modification of quantum dots and gold nano
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49

Servant, Nathalie. "Mise au point et propriétés rhéologiques d'un hydrogel mucoadhésif à usage ophtalmique en vue de l'amélioration de la biodisponibilité d'un principe actif hydrosoluble." Montpellier 1, 1996. http://www.theses.fr/1996MON13525.

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50

Ydrefors, Maria. "Compound meniscus implant prototypes : Bench test performance of knitted casing to contain, fixate and mechanically stabilize cell seeded gels." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-25172.

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Meniscal tears are the most common intra-articular injury of the knee joint. Due to the avascular zone with limited blood supply, treatment of the injury is a complex process. Today, research on the development of efficient treatments and meniscal replacements is of increasing interest. However, there are few alternatives of meniscal replacements available on the market and research has shown uncertain results in their ability to restore the natural biomechanics of the knee joint or prevent development of osteoarthritis. Furthermore there is no comparable method to evaluate tensile stresses ca
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