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Dissertations / Theses on the topic 'Biopolymer Gels'

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Published: 6 September 2023

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1

Hasnain, Imran Ali. "Measurement of anisotropy in biopolymer gels via microrheology." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612871.

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2

Tobitani, Atsumi. "Rheological and structural studies of biopolymer gels and gelation." Thesis, King's College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338701.

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3

Ng, Karen Kailin. "Collagen scaffolds and injectable biopolymer gels for cardiac tissue engineering." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/75848.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, February 2012.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student submitted PDF version of thesis.<br>Includes bibliographical references (p. ).<br>Three-dimensional biomaterial scaffolds have begun to shown promise for cell delivery for cardiac tissue engineering. Although various polymers and material forms have been explored, there is a need for: injectable gels that me
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4

Paterson, Ronald S. "Biopolymer floating raft formation and their use as drug delivery platforms." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273341.

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5

Pettignano, Asja. "Alginate : a versatile biopolymer for functional advanced materials." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2016. http://www.theses.fr/2016ENCM0004.

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Les alginates, des polysaccharides produits par les algues brunes, sont des copolymères à blocs linéaires, formés d’unités mannuronate (M) et guluronate (G). En raison de leur abondance naturelle, prix et propriétés physicochimiques avantageuses, les alginates représentent une classe de biopolymères très intéressante et relativement inexplorée pour des applications dans le domaine des matériaux avancés. Dans ce contexte, le présent travail vise à enrichir la gamme des applications des matériaux dérivés d’alginates, en exploitant les propriétés de cette classe de polysaccharides naturels. En pa
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6

Wagner, Caroline (Caroline Elizabeth). "Micro- and macro-rheological studies of the structure and association dynamics of biopolymer gels." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119348.

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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 191-205).<br>The cross-linked polymeric microstructures of biological hydrogels (or biogels) give rise to their mechanical properties, which in turn contribute to their proper biological function. For example, cartilage is stiff, elastic, and capable of withstanding substantial compressive forces in the knee, while saliva is thin, highly lubricious, and crucial for the maintenance of oral health. Quantification
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7

Barnes, Samesha Rosánne. "Injectable biopolymer gel compositions for neural tissue repair." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024088.

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8

Alikhanzadeh, A. S., and A. M. Azimzadeh. "Preparation of Pure DyBa2Cu3O7-X Nanocluster Superconductors using Biopolymer Chitosan." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/34952.

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We used sol-gel method for synthesizing nanoclusters of DyBa2Cu3O7-X high TC type II superconductor in presence of biopolymer chitosan. In the first stage, the precursor and biopolymer aggregated into amorphous matrix and hydrogels are then formed by thermogelling. The fibrous nature of the biopolymer chitosan is retained at high temperatures up to 500 °C. After heating to 900 °C, complete decomposition of BaCO3 and formation of the superconductor nanoparticles (with a diameter of 10-20 nm) occurred subsequently. Characterization of specimens was performed using scanning electron microsco
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9

Li, Sisi. "Gel-embossing and electrospinning of biopolymers for cell culture and tissue engineering studies." Paris 6, 2013. http://www.theses.fr/2013PA066279.

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Ce travail de thèse vise à explorer des techniques de nanofabrication pour produire des substrats de culture et des matrices de génie tissulaire, basant sur une nouvelle approche biomimétique. Nous avons d’abord développé une nouvelle technique de moulage pour répliquer des nanostructures dans une couche de gélatine. Les motifs micrométriques peuvent être plus facilement obtenus par moulage assisté par aspiration. A plus large échelle, des matrices de trous à travers peuvent être percés dans une couche mince de gélatine en utilisant une machine-outil à commande numérique par ordinateur le tout
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10

Torres, Marco Antonio. "Propriedades viscosas e viscoelasticas de soluções e geis de quitosana." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267605.

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Orientador: Cesar Costapinto Santana<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-07-29T03:19:59Z (GMT). No. of bitstreams: 1 Torres_MarcoAntonio_M.pdf: 2067792 bytes, checksum: 4a29bce462549322420c9d13dd7180eb (MD5) Previous issue date: 2001<br>Resumo: biopolímero denominado quitosana vem sendo reconhecido como uma importante fonte de matrizes para adsorventes em processos de recuperação e purificação de bioprodutos, com novas aplicações em várias áreas do conhecimento como a biotecnologia. Uma importante
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11

Normand, Valéry. "Comportement rhéologique des gels de gélatine, relations propriétés-structures." Nancy 1, 1995. http://www.theses.fr/1995NAN10246.

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Ce travail a été réalisé dans le cadre d'une convention avec la société Elf Aquitaine. L'analyse a porté sur six extractions d'os chaule, et a consisté à caractériser ces différentes extractions par la détermination des paramètres rhéologiques (modules d'élasticité et de perte, complaisance et gonflement) en fonction de divers paramètres tels que la température, la concentration et le temps de murissement du gel, en utilisant d'une part la modélisation statistique pour les mesures cinétiques et les distributions de temps caractéristiques pour les mesures de fluage. Il résulte de cette étude qu
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12

Takeuchi, Katiuchia Pereira. "Propriedades macro- e microscopicas de geis de proteinas do leite e k-carragena." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255565.

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Orientador: Rosiane Lopes da Cunha<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-10T02:52:06Z (GMT). No. of bitstreams: 1 Takeuchi_KatiuchiaPereira_D.pdf: 2512071 bytes, checksum: bf144af04917964fdd59c0d4a482b84e (MD5) Previous issue date: 2008<br>Resumo: A avaliação do processo de gelificação ácida de caseinato de sódio (CS) induzida por glucona-d-lactona (GDL) foi realizada em diferentes taxas e com ampla faixa de concentração de proteína (2-6% p/p). A cinética de acidificação e gelificação foi avaliada
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13

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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14

Menakbi, Chemseddine. "Développement d'une approche multiéchelle pour l'étude des propriétés structurales et des réactivités d'assemblages complexes de biopolymères : les gels d'alginates." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2017. http://www.theses.fr/2017ENCM0005.

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Macromolécules formées par la répétition de nombreuses sous-unités appelées monomères, les biopolymères sont des polymères issus de la biomasse constituant une classe de matériaux utilisée dans des domaines très divers : industrie pharmaceutique et cosmétique, génie tissulaire, agroalimentaire et médical. Leur disponibilité, leur prix, leur non toxicité et leur biodégradabilité font de ces matériaux un sujet d’intérêt croissant pour la communauté. L’assemblage des biopolymères en gels induit par un facteur externe (cations métalliques, pH, agents réticulants organiques) est une de leurs propri
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15

Yoon, Won Byong. "Rhelogical characterization of mixed biopolymer gel systems /." 2001. http://www.library.wisc.edu/databases/connect/dissertations.html.

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16

Chih-Cheng, Huang, and 黃志誠. "Rheological Characterization of Gel Point for Several Complex Biopolymer Solutions." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/63013508849995903659.

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碩士<br>國立中興大學<br>化學工程學系<br>88<br>The gel point of complex biopolymer solutions was studies by rheometers (SR5 and RFS), and the effect of physical attractive interactions and composition (or stoichiometry) to the network structure of mixed gels was explored. The attractive forces include electrostatic interaction and synergism. Electrostatic interaction takes place between two polymers with opposite charges. Synergistic interaction is often found in mixed solutions of plant galactomannans (locust bean gum or guar gum) and galactans (carrageenan or agar). According to the definition of gel p
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17

Fialho, Letícia Maria Rui. "Preparation of biopolymer structures based on FucoPol." Master's thesis, 2017. http://hdl.handle.net/10362/25833.

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FucoPol is a high molecular weight exopolysaccharide (EPS) secreted by the bacterium Enterobacter A47 that is composed of the neutral sugars fucose, galactose and glucose, and the acidic sugar glucuronic acid. It also has substituent acyl groups (acetyl, succinyl and pyruvyl). The presence of glucuronic acid, together with succinyl and pyruvyl, confer the polymer an ani-onic character. The main goal of this thesis was to develop polymeric structures based on FucoPol. First-ly, FucoPol was produced using glycerol as the sole carbon source for the cultivation of Entero-bacter A47. A production
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18

Morgado, João Frederico Lourenço dos Santos Barata. "Preparation of biopolymer-drug formulations for cancer drug delivery." Master's thesis, 2018. http://hdl.handle.net/10362/69932.

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Mannans are highly water-soluble mannose heteropolymers produced by a number of organisms, including yeasts. Polyhydroxyalkanoates (PHAs) are aliphatic polyesters produced by numerous bacteria as a carbon and energy source, with interesting thermal and mechanical properties. The main objective of this thesis was to prepare different polymeric structures base on mannans and PHAs for use in the pharmaceutical and biomedical areas. Mannans were produced by Komagataella pastoris using glycerol as carbon source, extracted with a heat-alkali treatment and purified using dialysis. PHAs were produced
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19

TARDANI, FRANCO. "Dispersions of carbon nanotubes in complex water-based matrixes." Doctoral thesis, 2012. http://hdl.handle.net/11573/666624.

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Questo lavoro riguarda dispersioni di nanotubi di carbonio in surfattanti e biopolimeri in soluzione acquosa. Il principale obiettivo è determinare i parametri critici che governano le dispersioni in sistemi concentrati. L'uso di matrici acquose complesse è pensato essere rilevante nella futura preparazione di biomateriali. Per questo scopi, matrici con interessanti capacità orientazionali e/o proprietà meccaniche notevoli sono considerate. I nanotubi di carbonio sono stati dispersi in sistemi micellari e nematici di sodio dodecil solfato e biopolimeri concentrati (DNA, Lisozima). I sistemi so
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20

Bento, Ana Moniz Côrte-Real Granja. "Desenvolvimento de géis injectáveis para libertação controlada e localizada de fármacos em feridas." Master's thesis, 2015. http://hdl.handle.net/10316/40220.

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Dissertação de Mestrado Integrado em Engenharia Química apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra<br>Este trabalho tem como principal objetivo o desenvolvimento de géis injetáveis para libertação controlada e localizada de fármacos em feridas. Desta forma, prepararam-se nanopartículas para encapsular o fármaco em estudo que foram posteriormente incorporadas num gel, que pode ser injetado no local pretendido. Estes sistemas de libertação controlada de fármacos (SLCs) foram produzidos a partir de polímeros de base natural, biodegradáveis e biocompatíveis, c
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