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Dissertations / Theses on the topic 'Hybridní hydrogely'

Author: Grafiati
Published: 28 June 2021
Last updated: 29 July 2025

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1

Kulovaná, Eva. "Vliv rozpouštědla na deformační chování hydrogelů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-437980.

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The thesis deals with molecular dynamic simulation of the influence of water on the deformation of hydrogels. Hydrogels are model materials formed from macromolecular networks solvated with water. It was found that water can form bridges between macromolecules that take the form of temporary ionic crosslinks. These bridges affect the behavior of the network during deformation. Water bridges are water molecules that have a limited radius of motion in the space between two macromolecules. The concentration of the water bridges was regulated by a partial charge on the macromolecular chain in the
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2

Klímová, Eliška. "Mechanické a transportní vlastnosti hybridních hydrogelových systémů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-444534.

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This master´s thesis deals with the study on mechanical and transport properties of hybrid hydrogel systems. Considering applications of hydrogels, especially in chemical industry, pharmacy, or eventually medical applications, for the study gellan and alginate-based hydrogels were selected. In order to compare individual characteristics physical and hybrid hydrogels were prepared. Gellan hydrogels were prepared in deionization aqua solution, calcium chloride dihydrate and tween 80 solution. Alginate hydrogels were prepared in calcium chloride dihydrate solution as well, and polyacrylamide with
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3

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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4

Walia, Rashi. "Solid-Hydrogel Hybrid Structural Materials for Biomedical Devices and Applications." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29549.

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Hybrid combinations of hydrogels and solid materials allow a high level of functionality for devices such as tissue engineering scaffolds and soft machines. This thesis reports a versatile strategy to develop mechanically robust solid-hydrogel hybrid materials using surface embedded radicals generated through plasma immersion ion implantation (PIII) of polymeric surfaces. Acrylamide and silk hydrogels were formed on PIII activated polytetrafluoroethylene (PTFE), polyethylene (PE) and polystyrene (PS) surfaces without any external crosslinking agents or initiators. X-ray photoelectron spectrosc
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5

Cornwell, Daniel. "Hybrid and multi-component hydrogels." Thesis, University of York, 2016. http://etheses.whiterose.ac.uk/15426/.

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Low-molecular-weight gelators (LMWGs) form a network via non-covalent interactions to immobilise the surrounding bulk solvent and form a gel. Whilst such gels are highly responsive and dynamic, they are often mechanically weak. In order to enhance the mechanical strength of such networks, the LMWG network can be supplemented with a second network formed from stronger polymer gelators (PGs) to yield a multi-component, multi-functional material – a hybrid gel. By using this multi-functionality, hybrid gels were made that could demonstrate the following: a) robustness yet responsiveness, b) spati
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6

Samchenko, Yu M., S. O. Kryklia, T. P. Poltoratska, et al. "Hybrid Hydrogel Materials with Incorporated Nanoparticles." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35464.

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Synthesis and physico-chemical studies of new promising hybrid hydrogels based on polyvinyl alcohol (PVA) acetales and copolymer hydrogels based on vynil monomers have been studied. Acrylamide and Acrylnitrile were used as some of components that carry various fillers . Sponge acetales of polyvinyl alco-hol were used as enforcing net. The synthesized composites demonstrated high strength as compared to standard hydrogels- Yung-module varied in the range of 80 to 300 kPa depending on the extent of PVA ac-etale matrix filling with hydrogel component. The materials showed high sorbability to wate
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7

MAZZITELLI, Stefania. "Cell encapsulation systems based on hybrid hydrogels." Doctoral thesis, Università degli studi di Ferrara, 2012. http://hdl.handle.net/11392/2389279.

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The entrapment of cells into biomaterials is one of the most appealing and usefulness tool in tissue engineering and cell based therapy applications. Cell encapsulation procedures allow the immunoisolation of cells from the surrounding environment, after their transplantation and the maintenance of the normal cellular physiology. In the current PhD work, various microencapsulation cell procedures are reported, based on a gas driven mono-jet device, a vibrating-nozzle procedure and microfluidics. All the analysed procedures were critically evaluated and applied to cells from different sources.
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8

Bellosta, von Colbe José M. "Hydrogen storage in light metal hybrides." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=97890365X.

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9

Zarzar, Lauren Dell. "Dynamic Hybrid Materials: Hydrogel Actuators and Catalytic Microsystems." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:10867.

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Dynamic materials which can sense changes in their surroundings and subsequently respond or adapt by autonomously altering their functionality, surface chemistry, transparency, color, wetting behavior, adhesiveness, shape, etc. are primed to be integral components of future "smart" technologies. However, such systems can be quite complex and often require intricate coordination between both chemical and mechanical inputs/outputs as well as the combination of multiple materials working cooperatively to achieve the proper functionality. It is critical to not only understand the fundamental beh
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10

Abdallah, Ibrahim. "Event-driven hybrid bond graph : Application : hybrid renewable energy system for hydrogen production and storage." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10104/document.

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Ce travail de thèse constitue une contribution à la modélisation et au diagnostic des systèmes multi-domaines à commutation (hybrides). Il est appliqué à la supervision des systèmes multi-sources d’énergie propre où l’hydrogène est utilisé comme moyen de stockage. Un tel système associe des composantes énergétiques de nature différente et fait l’objet de commutations produites par la connexion et déconnexion d’un ou plusieurs composants. Ces commutations génèrent différents modes de fonctionnement et sont liées à l’intermittence des sources primaires, aux capacités de stockage et à la disponib
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11

Benge, Kathryn Ruth. "Hybrid Solid-State Hydrogen Storage Materials." The University of Waikato, 2008. http://hdl.handle.net/10289/2320.

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This thesis investigates the chemistry of ammonia borane (NH3BH3) relevant to the development of hydrogen storage systems for vehicular applications. Because of its high hydrogen content and low molecular weight ammonia borane has the potential to meet stringent gravimetric hydrogen storage targets of gt;9 wt%. Two of the three moles of H2 in ammonia borane can be released under relatively mild conditions, with the highest gravimetric yield obtained in the solid-state. However, ammonia borane does not deliver sufficient H2 at practical temperatures and the products formed upon H2 loss are not
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12

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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13

IGLESIAS, ASPERILLA DANIEL. "Functionalisation of carbon nanostructures towards hybrid materials for different applications." Doctoral thesis, Università degli Studi di Trieste, 2017. http://hdl.handle.net/11368/2908176.

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During the last three decades, great scientific efforts led to the discovery and development of new carbon nanomaterials (e.g. carbon nanotubes or CNTs, carbon nanohorns or CNHs, and graphene or G). In the first chapter of this thesis, a general introduction on carbon nanostructures (CNS) and relevant characterisation techniques is provided (Chapter 1). Despite their superior electrical, thermal, and mechanical properties, CNS inherent tendency to aggregate initially limited their applications. This issue can be addressed by various chemical functionalisation routes to improve their dispersib
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14

Baumann, Bernhard Harry [Verfasser]. "Synthese und Charakterisierung hybrider Hydrogele für die Geweberekonstruktion / Bernhard Harry Baumann." Ulm : Universität Ulm, 2018. http://d-nb.info/1166757315/34.

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15

Eksteen, Zaskia-Hillet. "Hybrid hydrogels based on RAFT mediated poly(N-vinyl pyrrolidone)." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/4822.

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Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2009.<br>Thesis submitted in partial fulfilment for the degree of Master of Science (polymer science) at Stellenbosch University<br>ENGLISH ABSTRACT: The goal of this study was to synthesize hybrid hydrogels via a chemical crosslinking mechanism through use of chain end functional poly(N-vinyl pyrrolidone)(PVP) with various topologies. The crosslinking chemistries should be benign in nature i.e. at physiological pH ranges and at 37 °C. The degradation products should be biologically tolerable and renal clearance shou
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16

Scheler, Thomas Herbert. "Transition-metal-hydrogen systems at extreme conditions." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7611.

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The application of extreme conditions offers a general route for the synthesis of materials under equilibrium conditions. By finely tuning the thermodynamic variables of pressure and temperature one can manipulate matter on an atomic scale, creating novel compounds or changing the properties of existing materials. In particular, the study of hydrogen and hydrogen compounds has attracted the attention of researchers in the past. Although hydrogen readily reacts with many elements at ambient conditions, there is a significant “hydride gap” covering the d-metals between the Cr-group and Cu-group
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17

Holister, Larushka Padmini. "Synthesis and Characterisation of Collagen based Hydrogel Hybrids for Biomedical Applications." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/18720.

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Hydrogels are polymeric materials with swelling ability are known for maintaining their three dimensional structure after swelling with properties suitable for biomedical applications. Various methods for hydrogel biosynthesis are available, including copolymerisation, crosslinking via reactive polymer precursors and crosslinking through polymer-polymer reaction. Inadequacies with traditional methods of hydrogel formation include poor mechanical properties and slow response times to external stimuli. Introduction of crosslinking agents can potentially improve the physico- chemical and mechanic
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18

Bourgeteau, Tiphaine. "Development of hybrid photocathodes for solar hydrogen production." Palaiseau, Ecole polytechnique, 2015. https://tel.archives-ouvertes.fr/tel-01215429v1/document.

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L’utilisation des énergies renouvelables, qui sont intermittentes, à l’égal des énergies fossiles (échelle du TW) doit passer par leur conversion et stockage en un vecteur transportable. L’hydrogène semble le vecteur énergétique idéal qui peut être produit à partir de l’eau et de l’énergie solaire. Ce carburant peut ainsi être stocké, transporté puis utilisé à la demande en le combinant avec l’oxygène dans une pile à combustible. Les cellules photo-électrochimiques (PEC) utilisées pour la conversion ne sont actuellement pas rentables car les matériaux majoritairement utilisés pour leur fabrica
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19

Clarke, David. "'Smart' self-assembled β-sheet poly (γ-glutamic acid) hybrid hydrogels". Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/24728.

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Hybrid materials have been found to be possessed with unique and novel properties, by superimposing the advantages of each component to provide material properties far superior to the individual constituents alone. These types of material are used throughout the field of bioengineering, and can facilitate biological interactions on both a molecular and cellular level, responding to biological and mechanical queues. With these inherent unique properties these materials provide novel platforms to help repair, replace and regenerate body tissues and function. This thesis explores the synthesis of
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20

Slisenko, O. V., I. M. Bei, and V. L. Budzinska. "Synthesis and characterization of Polyacrylamide / Siloxane Double Network Hydrogels." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42515.

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A novel double-network (DN) hydrogels consisting of organic polyacrylamide (PAAm) network and inorganic siloxane network were synthesized by one-pot in situ polymerization. Spectral studies indicate a formation of DN structure of composite hydrogels obtained. Detailed study of the composites showed welldefined structurizing of hybrid hydrogels at molecular and nanolevel as well as intra- and intercomponent interactions via H-bonding. Nanostructurization possesses a great impact on final properties of the composite hydrogels. Prepared materials are characterized by improved thermal stability a
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21

Fiorini, Federica. "Soft hybrid materials for cell growth and proliferation." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAF027/document.

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Le travail de recherche consiste à développer des hydrogels pour la prolifération et la migration cellulaires in vitro et in vivo en trois dimensions (3D). Des hydrogels à base de polyamidoamines avec d'intéressantes propriétés physicochimiques et une remarquable biocompatibilité ont été développés pour différentes applications biomédicales. Un hydrogel avec des sondes luminescentes d’iridium(III) incorporés de manière covalente, a été conçue comme plate-forme 3D de culture cellulaire, pour la visualisation directe des cellules vivantes en temps réel, et a démontré être un puissant outil de bi
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22

Marpu, Sreekar B. "Biocompatible Hybrid Nanomaterials Involving Polymers and Hydrogels Interfaced with Phosphorescent Complexes and Toxin-Free Metallic Nanoparticles for Biomedical Applications." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc84243/.

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The major topics discussed are all relevant to interfacing brightly phosphorescent and non-luminescent coinage metal complexes of [Ag(I) and Au(I)] with biopolymers and thermoresponsive gels for making hybrid nanomaterials with an explanation on syntheses, characterization and their significance in biomedical fields. Experimental results and ongoing work on determining outreaching consequences of these hybrid nanomaterials for various biomedical applications like cancer therapy, bio-imaging and antibacterial abilities are described. In vitro and in vivo studies have been performed on majority
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23

Eriksson, Emma. "Hybrid Renewable Energy Systems with Battery and Hydrogen Storage." Thesis, Griffith University, 2017. http://hdl.handle.net/10072/378157.

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As population numbers and people's standards of living increase, so does the global energy demand and carbon dioxide emissions and it is imperative that new sustainable and renewable energy sources are sought, as the world's natural resources are depleting. Electricity generation presents the biggest opportunity to lower CO2 emissions and in an emerging world where the demand for alternative renewable energy systems is growing it is expected that one of the technologies in conjunction with conventional storage which will play a key role in reducing emissions is hydrogen fuel cell technology wi
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24

Goh, Wei Chiun. "Hybrid hydrogen energy stored in stand-alone power system." Thesis, Curtin University, 2008. http://hdl.handle.net/20.500.11937/578.

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A stand-alone power system is an autonomous system that supplies electricity to the user load without being connected to the electric grid. This kind of decentralized system is frequently located in remote and inaccessible areas. The purpose of this thesis is the modelling and simulation of a solar hydrogen hybrid power system to supply the typical residential electric customers in stand alone. It couples a photovoltaic (PV) generator, an alkaline water electrolyzer, a storage gas tank, a proton exchange membrane fuel cell (PEMFC), and power conditioning units (PCU) to give different system to
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25

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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26

Mahaweero, Thanatdej. "Extraction of Heavy Metals from Aqueous Solutions using Chitosan/Montmorillonite Hybrid Hydrogels." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1365160267.

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27

Gačanin, Jasmina [Verfasser]. "Design and Synthesis of Multifunctional Hybrid Hydrogels for Medicinal Applications / Jasmina Gačanin." Ulm : Universität Ulm, 2021. http://d-nb.info/123552843X/34.

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28

Le, Gulluche Anne-Charlotte. "Hybrid hydrogels as model nanocomposites : reinforcement mechanisms by analogy with filled rubbers." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1107/document.

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Les hydrogels sont des matériaux intrinsèquement mous, fragiles et élastiques, majoritairement composes d'eau. Leur capacité unique à interagir avec leur environnement se traduit par une grande variation de leur volume initial et en font l'objet d'applications variées dans de nombreux domaines tels que le secteur biomédical, l'industrie agro-alimentaire et cosmétique. Plus récemment, des hydrogels ont été développés pour des secteurs de pointe comme la robotique ou l'ingénierie tissulaire, permettant d'élargir le spectre d'utilisation de la matière molle en tant que matériau structurel. De ce
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29

Syed, Khurram Raza. "Electrochemical generation of hydrogen." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/13813.

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Global warming and the energy crisis are two of the greatest challenges on which mankind is currently focused. This has forced governments and other organisations to think how to protect the environment and how to reduce fuel costs. A variety of new and exciting technologies are being investigated to address the energy problem. Alternative energy sources such as solar power, fuel cells, wind power and tidal waves are active areas of commercial and scientific pursuit. A major area of current research is moving towards the hydrogen economy and hydrogen based energy systems. Hydrogen can be produ
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30

Diaconu, Cristian V. "Hybrid density functional studies of hydrogen storage related molecular systems /." View online version; access limited to Brown University users, 2005. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3174594.

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31

Dhanasingh, Anandhan [Verfasser]. "sP (EO-stat-PO) - glycosaminoglycans (GAGs) hybrid-hydrogels for medical applications / Anandhan Dhanasingh." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1018709886/34.

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32

Shin, Hye Ji. "Micropatterned carbon nanotube embedded cell-laden gelatin methacrylate hybrid hydrogels for cardiac tissue." Thesis, Boston University, 2013. https://hdl.handle.net/2144/12222.

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Thesis (M.A.)--Boston University<br>Cardiovascular disease is the leading cause of mortality in the world. Cardiac tissue engineering promises to replace damaged organs and tissues with biologically compatible engineered substitutes. Micro- and nanotechnologies have proven to be effective to address current challenges in tissue engineering and regenerative medicine. A principle approach in tissue engineering is the integration of innovative biomaterials with micro- and nanofabrication techniques to generate constructs that recapitulate the in vivo cellular microenvironments. In this study, hig
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33

Clauzier, Stéphanie. "Etude de la solubilité de l’hydrogène dans des liquides confinés." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10285/document.

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L’adsorption des gaz dans les solides micro/mésoporeux et la solubilisation des gazdans les liquides sont des phénomènes physiques très bien connus. En revanche, lasolubilisation des gaz dans un liquide confiné à l’intérieur d’un solide (système hybride) estun domaine très peu étudié, malgré des applications importantes, notamment dans l’extractiondu pétrole, les ciments ou encore les réacteurs catalytiques triphasiques. Nous avons montréexpérimentalement que la solubilité du CO2 et H2 augmente quand la taille de pores du solideest de l’ordre du nanomètre. Un des objectifs de cette thèse était
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Ciftci, Saït. "Use of functionalized hydrogels for rapid re-epithelialization of hybrid implants in tissue engineering." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAE023.

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Dans le cadre du développement d’un larynx artificiel, les expérimentations sur l’animal et les essais cliniques ont mis en évidence un défaut de ré-épithélialisation de la face endoluminale de la prothèse. Cet épithélium respiratoire est absolument nécessaire pour obtenir un dispositif implantable totalement intégré dans le corps mais également pour la fonctionnalité d’un tel implant. Dans ce travail nous avons développé de nouveaux films d’hydrogels de collagène et d’acide hyaluronique interpénétrés et réticulés pour assurer une repousse épithéliale rapide. Ces films d’hydrogels optimisés on
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Rodriguez, Ramon, and Pamplona David Sanchéz. "DYNAMIC MODELING OF HYBRID PV/THERMAL SOLAR SYSTEM FOR HYDROGEN PRODUCTION." Thesis, University of Gävle, University of Gävle, Department of Technology and Built Environment, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-3580.

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Jeličić, Aleksandra, Alwin Friedrich, Katarina Jeremić, Gerd Siekmeyer, and Andreas Taubert. "Polymer hydrogel/polybutadiene/iron oxide nanoparticle hybrid actuators for the characterization of NiTi implants." Universität Potsdam, 2009. http://opus.kobv.de/ubp/volltexte/2010/4858/.

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One of the main issues with the use of nickel titanium alloy (NiTi) implants in cardiovascular implants (stents) is that these devices must be of very high quality in order to avoid subsequent operations due to failing stents. For small stents with diameters below ca. 2 mm, however, stent characterization is not straightforward. One of the main problems is that there are virtually no methods to characterize the interior of the NiTi tubes used for fabrication of these tiny stents. The current paper reports on a robust hybrid actuator for the characterization of NiTi tubes prior to stent fabrica
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37

Habib, MD Ahasan. "Designing Bio-Ink for Extrusion Based Bio-Printing Process." Diss., North Dakota State University, 2019. https://hdl.handle.net/10365/32045.

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Tissue regeneration using in-vitro scaffold becomes a vital mean to mimic the in-vivo counterpart due to the insufficiency of animal models to predict the applicability of drug and other physiological behavior. Three-dimensional (3D) bio-printing is an emerging technology to reproduce living tissue through controlled allocation of biomaterial and cell. Due to its bio-compatibility, natural hydrogels are commonly considered as the scaffold material in bio-printing process. However, repeatable scaffold structure with good printability and shape fidelity is a challenge with hydrogel material due
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38

Zamboulis, Alexandra. "Silices hybrides pour l'organocatalyse asymétrique." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2010. http://www.theses.fr/2010ENCM0004.

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L'organocatalyse asymétrique est un domaine en plein développement. L'immobilisation de ce type de catalyseurs pourrait présenter de multiples avantages. Ces travaux de thèse s'intéressent à la préparation de silices hybrides organiques/inorganiques par voie sol-gel et aux applications de ces matériaux en organocatalyse asymétrique. La première partie du manuscrit est consacrée à une présentation bibliographique du sujet. Dans la deuxième partie, l'utilisation de la L-proline comme modèle est décrite. Des matériaux contenant un fragment L-proline ont été préparés et leurs performances catalyti
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Gong, Andrew Tian You. "Impact of Supercapacitors on a Fuel-Cell-Based Triple Hybrid for Small Unmanned Aircraft." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/18912.

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Hybrid fuel-cell-based propulsion systems have the potential to transform the use of small electric powered unmanned aircraft. Offering the possibility of greatly increased flight endurance and range over existing battery systems, hybrid systems also overcome some of the limitations inherent with fuel cell only systems such as low specific power and comparatively slow dynamic response. However, although there have been many fuel-cell/battery hybrid systems developed for unmanned aerial vehicle (UAV) propulsion, alternative power storage devices such as supercapacitors have not been adequately
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Sdanghi, Giuseppe. "Développement d’un compresseur hybride d’hydrogène : électrochimique à basse pression/adsorption à haute pression." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0145.

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La preuve de concept d’un compresseur non-mécanique d’hydrogène a été réalisée dans le cadre de ce travail de thèse. Le système étudié est hybride puisqu’il est constitué de (i) une première étape de compression électrochimique, qui comprime l’hydrogène de 1 bar jusqu’à 40-80 bar et ; (ii) une deuxième étape de compression par adsorption-désorption qui complète la compression jusqu’à 700 bar. Des modèles numériques ont été développés pour vérifier la faisabilité d’un tel système, et leur validité a été prouvée par les données expérimentales obtenues avec les prototypes réalisés pour chacune de
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41

Majewski, Alexander [Verfasser], and Axel [Akademischer Betreuer] Müller. "Dual-Responsive Polymer and Hybrid Systems: Applications for Gene Delivery and Hydrogels / Alexander Majewski. Betreuer: Axel Müller." Bayreuth : Universität Bayreuth, 2013. http://d-nb.info/1059352680/34.

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42

Mhiri, Sirine. "Elaboration et caractérisation d’hydrogels à base de monomères biosourcés par la réaction de Diels-Alder." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSES024/document.

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Les travaux de recherche réalisés, dans le cadre de la préparation de cette thèse ont pour objectif l’élaboration de nouveaux réseaux thermoréversibles biodégradables à base de polyglycolide (PGA) et d’hydrogels à base de polylactide (PLA) modifiés chimiquement au moyen du noyau furanique et du cycle maléimide. La réticulation du PGA, en suivant deux stratégies, en vue d’élaborer des réseaux thermoréversibles et biodégradables via la réaction de Diels-Alder a fait l’objet de la première partie de ce travail. Le but était entre autres de valoriser le PGA en conduisant à des structures réticulée
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43

Appressi, Lorenzo. "Biogas and bio-hydrogen: production and uses. A review." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9071/.

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The first part of this essay aims at investigating the already available and promising technologies for the biogas and bio-hydrogen production from anaerobic digestion of different organic substrates. One strives to show all the peculiarities of this complicate process, such as continuity, number of stages, moisture, biomass preservation and rate of feeding. The main outcome of this part is the awareness of the huge amount of reactor configurations, each of which suitable for a few types of substrate and circumstance. Among the most remarkable results, one may consider first of all the wet con
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44

Gazey, Ross Neville. "Sizing hybrid green hydrogen energy generation and storage systems (HGHES) to enable an increase in renewable penetration for stabilising the grid." Thesis, Robert Gordon University, 2014. http://hdl.handle.net/10059/947.

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A problem that has become apparently growing in the deployment of renewable energy systems is the power grids inability to accept the forecasted growth in renewable energy generation integration. To support forecasted growth in renewable generation integration, it is now recognised that Energy Storage Technologies (EST) must be utilised. Recent advances in Hydrogen Energy Storage Technologies (HEST) have unlocked their potential for use with constrained renewable generation. HEST combines Hydrogen production, storage and end use technologies with renewable generation in either a directly conne
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Zang, Dejin. "Hybrid polyoxometalate@M NP photosensitized systems for the generation of photocurrent or for the generation of dihydrogen." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAF032.

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Différents systèmes polyoxométallates@M-colorants ont été réalisés dans cette thèse pour électrochimique dégagement d'hydrogène catalytique et génération photocourant.• Des films hybrides, basés sur des interactions électrostatiques entre une porphyrine tetracationique et des nanoparticules stabilisées par des POMs du type POM@Pt sur ITO, ont été formés par la méthode dite couche par couche et ont été utilisés pour la génération de H2 ou de photocourant. • Pour améliorer le transfert de charge entre les nanoparticules POM@M et le substrat, la réduction de l'oxyde de graphène a été réalisée pou
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Amoura, Makhlouf. "Elaboration de nouvelles matrices minérales pour l’encapsulation cellulaire : approche colloïdale." Paris 6, 2008. http://www.theses.fr/2008PA066104.

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Le travail décrit dans ce mémoire de thèse vise à étendre la technique d’encapsulation cellulaire par voie sol-gel à des matrices d’oxydes métalliques. L’utilisation de l’approche colloïdale pour l’élaboration de telles matrices nous a permis d’élaborer des gels d’oxyhydroxydes d’aluminium, de fer et de zirconium à des pH proches de la neutralité et à une température ambiante, conditions favorables à l’incorporation de bactéries Escherichia coli. Ces matériaux on été caractérisés de manière approfondie à l’aide de différentes techniques (analyse élémentaire, spectroscopie IR, diffraction des r
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Abdin, Zainul. "Components models for solar hydrogen hybrid energy systems based on metal hydride energy storage." Thesis, Griffith University, 2017. http://hdl.handle.net/10072/370890.

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Modelling and simulation are essential tools for concept evaluation and for predicting the performance of a hybrid energy system, since prototyping and testing each candidate design for such a complex system would almost always be prohibitively cumbersome, expensive and time consuming. To meet the modelling and simulation objectives, the various components of the system (sources, storage, loads, and converters) need to be characterised and modelled in a tractable way. The tuning of the models to reflect the actual system components is a key milestone in this process and requires reliable and c
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Moussa, Georges. "Nanoconfinement de l’ammoniaborane dans du carbone ou nitrure de bore mésoporeux : matériaux hybrides pour le stockage chimique et la génération d’hydrogène." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20033/document.

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La thèse a concerné l'élaboration de matériau composite NH3BH3@BN pour le stockage chimique de l'hydrogène et a été divisée en 3 axes majeurs : la synthèse de NH3BH3 mais aussi celle d'un dérivé, l'hydrazine borane N2H4BH3 (publié dans /Phys.Chem.Chem.Phys/.: 2012, 14, 1768; "Hydrazine borane: synthesis,characterization, and application prospects in chemical hydrogen storage"), optimisation du processus de confinement en utilisant un matériau hôte commercial et abondant comme le charbon actif (NORIT SX1 700 m^2 /g) (publié dans /Int. J. Hydrogen Energy/:2012, 37, 13437 ; "Room-temperature hydr
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Hertle, Yvonne [Verfasser]. "Structure and dynamics of new intelligent copolymer hydrogels and hydrogel nanoparticle hybrids / vorgelegt von Yvonne Hertle." 2010. http://d-nb.info/1012846601/34.

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Esteves, Marco Rafael Cunha. "Photo-crosslinkable hydrogels through click chemistry to deliver complex protein cocktails and nanoencapsulated drugs." Master's thesis, 2019. http://hdl.handle.net/10773/30160.

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Osteoarthritis is the most common form of arthritis worldwide. This clinical condition, typically, leads to the degeneration of the osteochondral interfaces in the joints, as the result of a complex pathophysiologic process, characterized by a chronic inflammatory microenvironment, for which no curative treatments are currently available. New approaches to promote cartilage regeneration through the application of biomaterials, proteins/drugs delivery and/or stem cells have been actively explored by the scientific community. The main ideas explored rely in the application of bioactive
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