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Tesi sul tema "Alginate"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Márquez, Maqueda Augusto. "Alginate and silk fibroin based technologies for biosensing." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670117.

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A causa de el fort impacte de la diabetis com a malaltia d’extensió mundial ia les perspectives d’increment en el nombre de persones afectades durant els propers anys, especialment en països subdesenvolupats, hi ha una gran necessitat de producció de sistemes de detecció i quantificació de glucosa, que puguin ser implementats en dispositius portables robustos, miniaturitzats, de baix cost i llarga durada, tipus Point of Care (POC). En aquest sentit, en aquesta tesi es proposa l’ús de biomaterials d’origen natural, com l’alginat i la fibroïna de seda, procedents de l’alga bruna (classe Phaeoph

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2

Aarstad, Olav Andreas. "Alginate sequencing : Block distribution in alginates and its impact on macroscopic properties." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bioteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20246.

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3

Hadjialirezaei, Soosan. "Coating of alginate capsules." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bioteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22908.

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Alginate is a popular candidate for encapsulation of cells due to the formation of gels with divalent ions under physiological conditions. Stable alginate gels can be formed by the selection of alginates with a high content of guluronic acid (G) and gelling in a mixture of calcium and barium. These alginate gels have been proposed as immune protective barriers for the transplantation of human pancreatic islets (insulin producing cells) for the treatment of type 1 diabetes where the alginate gel protects the transplant from the host immune system. Microencapsulation can thus provide a way to ov

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4

Brivonese, Anne Caterina. "Alginate biosynthesis in Azotobacter vinelandii." Thesis, University of Edinburgh, 1985. http://hdl.handle.net/1842/16946.

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5

Lima, Caroline Santos Alves de. "Estudo do desenvolvimento de microcápsulas de polímeros naturais para aplicação em têxteis médicos." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/100/100133/tde-01112017-144224/.

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A indústria têxtil busca recuperar a diminuição do ritmo dos negócios, notado principalmente em países desenvolvidos devido ao cenário da economia mundial, por meio da elaboração de têxteis com maior valor agregado. A microencapsulação é uma técnica versátil e flexível que apresenta diversas vantagens, como evitar que o princípio ativo reaja com outros compostos presentes no sistema e possibilitar a liberação controlada, que aumenta potencialmente a eficiência do produto. O principal objetivo deste trabalho foi desenvolver microcápsulas de quitosana e alginato com incorporação de Triclosan, qu

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6

Reehorst, Camilla M. "The Mucin-Alginate Interplay : Investigating the Rheological Impact of Alginates and Their Influence on Particle Mobility." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bioteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-24921.

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Mucus is a hydrogel that covers epithelial cells and acts as an intermediary between the exterior and interior surfaces of the human body. It is complex and diverse, comprised of various compounds and serves as a selective barrier to pathogens, nutrients and administered substances. It is therefore important to circumvent or penetrate this barrier to increase drug bioavailability. The most important constituent of mucus is mucin glycoprotein that enables gel formation. Due to the molecular nature of mucin, it interacts with most substances including polyanionic biopolymers like alginates. Algi

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7

Silva, Adriana Navarro da [UNESP]. "Substratos alternativos para a produção de poli-hidroxibutirato e alginato por Azotobacter vinelandii." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/100889.

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Made available in DSpace on 2014-06-11T19:31:03Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-03-16Bitstream added on 2014-06-13T20:01:30Z : No. of bitstreams: 1 silva_an_dr_sjrp.pdf: 845355 bytes, checksum: bf12e08f381ee2126b3f6f0827cd993a (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Atualmente a destinação do lixo é uma das grandes preocupações da organização urbana e os problemas ambientais causados pela produção e acúmulo de materiais plásticos de origem petroquímica têm incentivado muitos países a realizarem estudos de gerenciamento do volume

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8

Dumont, Mélanie. "Élaboration et caractérisation de fibres mixtes Alginate / Chitosane." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1303/document.

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Dans ces travaux de recherche, la préparation de fibres d'alginate de calcium revêtues de chitosane par un procédé de filage par mouillage et la caractérisation de ces fibres dont leur activité antibactérienne sont présentées. Un métier à filer à l'échelle pilote a été conçu et développé au cours de ces travaux de thèse pour l'élaboration de fibres d'alginate de calcium. Ces dernières, préalablement fabriquées, sont immergées dans une solution d'acétate de chitosane. Trois méthodes de coagulation de l'enduit de chitosane ont été explorés dont deux consistent en l'immersion des fibres dans un b

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9

Monteiro, Centeno da Costa Filipe. "Procédé d’immobilisation de levures pour applications oenologiques. Etudes des paramètres du procédé. Validations experimentales." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0061.

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L'étude et le développement des procédés de fabrication de levures immobilisées en vue de la réalisation de fermentations de vins a débuté au milieu des années 80. Malgré les bénéfices potentiels que cette technologie pouvait apporter pour le secteur œnologique, peu de procédés d'immobilisation ont réussi à dépasser l'échelle laboratoire ou pilote et ceux qui sont arrivés à l'échelle industrielle n'ont pas eu le succès désiré pour des questions d'ordre technique ou économique. Le premier objectif de ce travail concerne la mise au point du procédé industriel en insistant sur les aspects les plu

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10

Govan, John R. W. "Pseudomonas, alginate biosynthesis and cystic fibrosis." Thesis, University of Edinburgh, 1994. http://hdl.handle.net/1842/28137.

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11

Parsian, Ava. "Simvastatin Encapsulation in Alginate-Based Microspheres." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34439.

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Despite the great success of hip implant surgeries, wear particle-induced implant aseptic loosening still limits the implant longevity. Simvastatin, an FDA-approved cholesterol lowering statin, is a promising drug candidate for the treatment of implant aseptic loosening due to its anti-inflammatory properties as well as its ability to stimulate bone growth and inhibit bone resorption. In addition, alginate microspheres have been used extensively in drug delivery applications because of alginate properties, including biocompatibility and gelation in mild conditions. However, the hydrophobicity

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12

Zou, Jennifer. "Membrane coating of alginate-DNA microspheres." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ29639.pdf.

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13

Oates, Christopher G. "Soya/alginate interactions in extrusion cooking." Thesis, University of Nottingham, 1988. http://eprints.nottingham.ac.uk/11161/.

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Previous work has shown that following the inclusion of alginate high in mannuronic acid there is a reduction in the viscosity of soya melt during extrusion, this work attempts to identify the mechanism for this effect. The effect of water content and hydrocolloid inclusion on the denaturation behaviour and water binding properties of soya protein has been investigated, mainly by the use of differential scanning calorimetry. Of a range of parameters investigated, transition onset temperature and enthalpy, change in specific heat function and coopertivity of the transition all show a dependence

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14

Jitraruch, Suttiruk. "Alginate-encapsulated human hepatocytes for transplantation." Thesis, King's College London (University of London), 2014. http://kclpure.kcl.ac.uk/portal/en/theses/alginateencapsulated-human-hepatocytes-for-transplantation(d2b15a91-c475-4c15-9a44-84f7fdf87156).html.

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Intraperitoneal transplantation of alginate-microencapsulated human hepatocytes is an attractive option for the management of acute liver failure by providing short-term support to bridge patients to liver transplantation or allow native liver regeneration. Its success depends on mechanical stability, optimal permeability, and biocompatibility of the encapsulated cells to provide good viability and function. The main aims of this study were to optimise protocols for production and cryopreservation of human hepatocyte microbeads (HMBs) for future clinical use. HMBs were prepared using sterile u

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15

Silva, Adriana Navarro da. "Substratos alternativos para a produção de poli-hidroxibutirato e alginato por Azotobacter vinelandii /." São José do Rio Preto : [s.n.], 2012. http://hdl.handle.net/11449/100889.

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Orientador: Crispin Humberto Garcia-Cruz<br>Banca: Eleni Gomes<br>Banca: José Roberto Ernandes<br>Banca: Mário Antônio Alves da Cunha<br>Banca: Vanildo Luiz Del Bianchi<br>Resumo: Atualmente a destinação do lixo é uma das grandes preocupações da organização urbana e os problemas ambientais causados pela produção e acúmulo de materiais plásticos de origem petroquímica têm incentivado muitos países a realizarem estudos de gerenciamento do volume de lixo sólido, incluindo a diminuição de resíduos plásticos por meio do desenvolvimento de bioplásticos. Os bioplásticos possuem propriedades semelhant

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16

Chavagnat, Frédéric. "Production d'anticorps monoclonaux anti-alginate : surproduction, structure et activité des alginate lyases bactériennes AlxM et Algi en vue de la préparation d'un complexe anti-alginate contre Pseudomonas aeruginosa." Lyon 1, 1996. http://www.theses.fr/1996LYO10040.

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L'alginate, polymere d'acides mannronique et guluronique, est un facteur de virulence de pseudomonas aeruginosa. Il protege la bacterie de la phagocytose et de l'action des antibiotiques. Le but de mon travail etait d'obtenir des anticorps anti-alginate et de produire en grande quantite des alginate lyases actives sur l'alginate de p. Aeruginosa. Des anticorps monoclonaux igm anti-alginate ont ete obtenus par immunisation de souris avec un conjugue bsa/alginate de p. Aeruginosa. Ils ont ete purifies puis reduits en monomeres pour un couplage avec la peroxydase. Le conjugue fonctionnel obtenu a

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17

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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18

Barbier, Lucile. "Hydrogels injectables thermostimulables : relations structure/propriétés." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS394.

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Ce travail de thèse porte sur le développement d’hydrogels injectables thermostimulables. Dans le cadre de la délivrance de principes actifs, l’objectif est de partir d’une solution de polymère suffisamment fluide à température ambiante pour pouvoir être injectée à un endroit ciblé du corps et d’obtenir une gélification rapide de la formulation une fois introduite en milieu physiologique. Pour aborder cette étude, une large plateforme de copolymères greffés a été développée à partir de squelettes hydrophiles et de greffons thermosensibles caractérisées par leur LCST en milieu aqueux. Dans un p

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19

Sabra, Wael. "Microaerophilic production of alginate by Azotobacter vinelandii Mikroaerophile Alginatproduktion mit Azotobacter vinelandii /." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=956360513.

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20

Rokstad, Anne Mari Aukan. "Alginate capsules as bioreactors for cell therapy." Doctoral thesis, Norwegian University of Science and Technology, Department of Cancer Research and Molecular Medicine, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1535.

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21

McDonagh, Birgitte Hjelmeland. "Optimalised Carbodiimide Chemistry for RGD-coupled Alginate." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bioteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16807.

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Alginate is a naturally ocurring polyanion of (1&#8594;4)linked &#946;-d-mannuronic acid (M)and its C-5 epimer &#945;-l guluronic acid (G). The polyanion, and particularly longstretches of guluronic acids, chelates and form hydrogels in the presence of divalentcations such as Ca2+ . Chelation occur at physiological conditions and the formed hy-drogels are biocompatible and stable. These properties nominates alginate hydrogelsas promising biomaterials in tissue engineering applications. Encapsulation of cells inalginate beads is easily prepared by mixing cells with high molecular we

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22

Quong, Douglas. "DNA encapsulation within membrane-coated alginate beads." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0017/NQ44561.pdf.

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23

Hayes, Thomas. "Electrospinning of alginate nanofibres for medical applications." Thesis, University of Bristol, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.503858.

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Effective wound management and tissue repair is of significant importance for our increasingly ageing population. The aims of this research were to develop natural polymeric nanofibrous materials and investigate their potential for use in wound dressings and tissue engineering scaffolds; the enhanced performance of which, will improve patient comfort and recovery. This work has focused on the fabrication of alginate nanofibrous materials by electrospinning.

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24

Richardson, J. Craig. "Bioadhesive sodium alginate suspensions as oesophageal protectants." Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410337.

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25

Anozie, Uchechukwu Chamberlin. "Microencapsulation of Soluble Sulfur by Calcium Alginate." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1353388178.

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26

ANDRIEU, LAURENCE. "Caracterisation d'une alginate lyase de pseudomonas aeruginosa." Paris 11, 1995. http://www.theses.fr/1995PA112264.

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Pseudomonas aeruginosa est une bacterie pathogene opportuniste pouvant entrainer des infections graves, surtout au niveau des poumons des malades atteints de mucoviscidose. Sous l'effet de facteurs environnementaux, les bacteries vont produire des exopolysaccharides, les alginates, facteur important de la virulence de la bacterie. Les alginates sont des polymeres d'acides d-mannuronique et l-guluronique en liaison 1-4. Ils sont hydrolyses par un enzyme specifique, l'alginate lyase, qui catalyse une reaction de -elimination entre deux residus d-mannurosyl ou l-gulurosyl. Une activite alginolyti

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27

Damron, Frederick H. "Regulation of alginate production of Pseudomonas aeruginosa." [Huntington, WV : Marshall University Libraries], 2009. http://www.marshall.edu/etd/descript.asp?ref=999.

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28

Segato, Milena Pinotti. "\"Estudos termoanalíticos do ácido algínico e dos alginatos de metais alcalinos, alcalino-terrosos, amônio, mono-, di- e trietanolamônio\"." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/75/75132/tde-14052007-103912/.

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Os alginatos de metais alcalinos (Li+, Na+ e K+), alcalino-terrosos (Mg2+, Ca2+, Sr2+ e Ba2+), de amônio, mono-, di- e trietanolamônio foram sintetizados por neutralização do ácido algínico com os respectivos hidróxidos, ou carbonatos, e com as aminas. Os sais foram caracterizados por análise elementar e espectroscopia na região do infravermelho, confirmando as sínteses. Após caracterização, os compostos foram submetidos à análise térmica (TG/DTG, DTA e DSC) para avaliar seu comportamento térmico e seus resíduos de decomposição, que foram caracterizados por IR e XRD. Os alginatos de amônio e e

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29

Jesus, Geise Cristina de. "Desenvolvimento de matrizes poliméricas de alginato e pectina para o cultivo de células imobilizadas de Desmodesmus subspicatus em vinhaça de cana-de-açúcar." Universidade Federal de São Carlos, 2018. https://repositorio.ufscar.br/handle/ufscar/10472.

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Submitted by Geise Jesus (geise.crj@gmail.com) on 2018-04-17T00:23:24Z No. of bitstreams: 2 Dissertação-Geise Cristina de Jesus.pdf: 1627240 bytes, checksum: cd3bd55063ba96f48854e00923ac8b0e (MD5) Carta comprovante.pdf: 353788 bytes, checksum: 3b2d5be6eb455c3a33e7fb4ae9adcc11 (MD5)<br>Approved for entry into archive by Alini Demarchi (ri.bar@ufscar.br) on 2018-07-10T12:57:32Z (GMT) No. of bitstreams: 2 Dissertação-Geise Cristina de Jesus.pdf: 1627240 bytes, checksum: cd3bd55063ba96f48854e00923ac8b0e (MD5) Carta comprovante.pdf: 353788 bytes, checksum: 3b2d5be6eb455c3a33e7fb4ae9adcc11 (MD5

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Alves, Fernanda Germano. "Produção de β-galactosidade de Kluyveromyces marxianus CCT 7082 em fermentador e caracterização parcial da enzima livre e imobilizada". reponame:Repositório Institucional da FURG, 2008. http://repositorio.furg.br/handle/1/2566.

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Dissertação(mestrado) - Universidade Federal do Rio Grande, Programa de Pós-Graduação em Engenharia e Ciência de Alimentos, Escola de Química e Alimentos, 2008.<br>Submitted by Caroline Silva (krol_bilhar@hotmail.com) on 2012-09-16T23:58:31Z No. of bitstreams: 1 diss2008fernandagermanoalves.pdf: 800800 bytes, checksum: 497362ef874efddd275ccc67dcdf0d1e (MD5)<br>Approved for entry into archive by Bruna Vieira(bruninha_vieira@ibest.com.br) on 2012-09-22T15:51:30Z (GMT) No. of bitstreams: 1 diss2008fernandagermanoalves.pdf: 800800 bytes, checksum: 497362ef874efddd275ccc67dcdf0d1e (MD5)<br>Made ava

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Mo, Yayuan. "Elaboration et mise en oeuvre de membranes alginate, polyethylenimine à haut pouvoir de percolation : application en tant que matériaux adsorbants ou catalyseurs supportés." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTG014.

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L'alginate est un polymère hydrophile et biocompatible portant de nombreuses fonctions carboxyliques et de nombreux groupes hydroxyles. Ce travail a développé et optimisé le procédé de fabrication de membranes à haute pouvoir de percolation à base d'alginate. Ce procédé simple permet, par mélange de deux solutions d’alginate et de polyethyleneimine (PEI), d’obtenir un hydrogel structuré dont la stabilité est améliorée par réticulation (des fonctions aminées de la PEI par le glutaraldéhyde (GA)). Cette double interaction (PEI/alginate, PEI/GA) permet d’obtenir après séchage à l’air libre (donc

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32

Ben, Amara Chedia. "Étude des interactions polysaccharides – biomolécules antimicrobiennes de nature protéique : application à l’élaboration de microcapsules et de films actifs pour la conservation des aliments." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1247/document.

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Ce travail porte sur le développement de systèmes d’encapsulation à base de polysaccharides et de molécules antimicrobiennes de nature protéique comme le lysozyme du blanc d’œuf et la nisine produite par la bactérie Lactococcus lactis. La coacervation complexe de l’alginate ou la pectine (deux polysaccharides anioniques) avec le lysozyme ou la nisine, chargés positivement sur une large gamme de pH, serait une solution pour protéger ces molécules et assurer une libération contrôlée lors de la conservation d’un aliment. Les polysaccharides utilisés ont été choisis en fonction de leur sensibilité

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Lima, Daniel Oliveira de. "Influencia de alginato e quitosana na precipitação de fosfatos de calcio." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266944.

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Orientador: Marisa Masumi Beppu<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-08T12:50:27Z (GMT). No. of bitstreams: 1 Lima_DanielOliveirade_M.pdf: 10551325 bytes, checksum: b19eaea79808ec2adad2fc6b3728f8de (MD5) Previous issue date: 2006<br>Resumo: Não informado<br>Abstract: Natural systems are able to create organic-inorganic composites of remarkable properties. Bone, for instance, presents properties that are found both in ceramics and polymers. This effect is related to the organic matrix, which contr

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Paiva, Rafael Gonçalves de. "Obtenção e caracterização de membranas multicamadas de quitosana e alginato contendo cobre." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267188.

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Orientador: Marisa Masumi Beppu<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-13T07:18:21Z (GMT). No. of bitstreams: 1 Paiva_RafaelGoncalvesde_M.pdf: 2354207 bytes, checksum: c86d978c811175888a0c4b73a90c0a52 (MD5) Previous issue date: 2009<br>Resumo: Estudos envolvendo membranas têm atraído muito interesse nos últimos anos, uma vez que, além da aplicação clássica em processos de separação, estas têm sido usadas também em áreas como medicina, microeletrônica, tratamento de água, etc. À medida que o número

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Mørch, Yrr A. "Novel Alginate Microcapsules for Cell Therapy – A study of the structure-function relationships in native and structurally engineered alginates." Doctoral thesis, Norwegian University of Science and Technology, Norwegian University of Science and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2003.

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<p>Alginate microcapsules have the potential as immune barriers for cell transplantation where the alginate gel protects the transplant from the host immune system. Microencapsulation can thus provide a way to overcome the need for immunosuppressive drugs. The successful use of alginates as immobilization material has, however, been hampered by their mechanical instability and high porosity. To overcome this problem, a polycation layer has traditionally been added to the alginate gels. However, polycations are toxic to cells and provoke inflammatory reactions. Hence, the main goal of the prese

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Behar, Siham. "Synthèse d’oxydes métalliques par voie alginate et leur application dans l’oxydation catalytique des COV." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2013. http://www.theses.fr/2013ENCM0003/document.

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Les composés organiques volatils (COV) contribuent fortement à la pollution atmosphérique. Plusieurs techniques sont possibles pour leur élimination parmi lesquelles, l'oxydation catalytique est une alternative intéressante. Ces dernières années de nombreux efforts ont été entrepris pour la conception de catalyseurs à base d'oxyde de métaux de transition afin de remplacer les métaux nobles, généralement plus actifs pour cette réaction, mais chers. Le principal objectif de cette thèse est le développement de nouveaux catalyseurs à base d'oxyde métallique pour l'élimination du toluène, choisi co

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Lins, KÃzia Oliveira Abrantes de Lacerda. "Estudo das atividades antitumoral e inflamatÃria do alginato isolado da alga Sargassum Vulgare C. Agardh." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7855.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>O cÃncer Ã uma doenÃa que afeta cada vez mais um nÃmero maior de pessoas em todo o mundo. As terapias atuais utilizadas para o tratamento do cÃncer sÃo ainda insatisfatÃrias. Produtos naturais tÃm sido avaliados para seleÃÃo de compostos ativos, capazes de reduzir os tumores malignos de uma forma mais eficiente e com menos efeitos indesejÃveis. O alginato extraÃdo da alga Sargassum vulgare C. AGARDH (SVHV) foi testado para avaliaÃÃo do seu potencial antitumoral e imunoestimulante. AlÃm disso, foram feitos testes de toxicidade do

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Sachetto, João Paulo. "Efeito do tratamento térmico de STx-1b-Li+ na condutividade de filmes de STx-1b-Li+ /Alginato de sódio." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-06052016-084651/.

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Neste trabalho foram estudados os efeitos causados pelo tratamento térmico na argila STx-1b-Li+ na condutividade de filmes argila/alginato de sódio. O argilomineral STx-1b foi submetido à substituição isomórfica do cátion Na+ por Li+ e posteriormente ao tratamento térmico em diferentes temperaturas. As argilas STx-1b-Li+ não tratada e tratada termicamente foram caracterizada por difração de raios-X (DRX) e termogravimetria (TG). As curvas TG mostraram que o argilomineral STx-1b-Li+ apresentou três perdas de massa que podem ser atribuídas à água adsorvida na argila, a água de hidratação dos íon

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Meira, Daniela Martins. "Desinfecção de alginato." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/29453.

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A presente dissertação, composta de dois manuscritos, buscou preencher lacunas do conhecimento no que diz respeito à desinfecção de impressões de alginato. O primeiro trabalho foi realizado com o intuito de avaliar a eficácia antimicrobiana da solução de glutaraldeído 2% através do seu comportamento bactericida e bacteriostático quando utilizada para desinfecção de impressões de alginato dos pacientes de uma clínica de ensino odontológico de uma instituição federal, durante 28 dias. Logo após a ativação de 3L da solução desinfetante e sempre após a desinfecção de 10 impressões, foram coletadas

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Laouadi, Ornella Laura Nathalie. "Enantioselective Friedel-Crafts reaction catalysed by alginate aerogels." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18622/.

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Alginates are polysaccharides derived from brown algae, available in nearly unlimited amounts at very low prices. In the presence of some divalent metals, these renewable biopolymers can readily form hydrogels, solvogels and aerogels, characterized by high surface areas, good mechanical properties, tolerance to different media, and easy manageability. For these reasons, alginates are nowadays being thoroughly studied in heterogeneous catalysis; several applications in supported metal catalysis and as heterogeneous Brønsted acids have emerged. However, none of these studies has given an answer

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Ho, Jason G. S. "Retention of double-stranded DNA within alginate beads." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0007/MQ45277.pdf.

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Partap, Sonia. "Controlled porosity alginate hydrogels from emulsion templating techniques." Thesis, Queen Mary, University of London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429360.

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Heywood, Hannah Kate. "Chondrocyte metabolism in alginate constructs for tissue engineering." Thesis, Queen Mary, University of London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415428.

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44

Farrell, Robert. "Characterisation of alginate liquor extracts from brown seaweeds." Thesis, Glasgow Caledonian University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443163.

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Sartori, Celine. "The characterisation of alginate systems for biomedical applications." Thesis, Brunel University, 1997. http://bura.brunel.ac.uk/handle/2438/7399.

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This research project focused on a range of polysaccharides, including sodium alginates (with varying mannuronic (M)/guluronic (G) acid ratio), pectin and sodium carboxymethylcellulose (CMC), for wound dressing applications. The samples were prepared as mixed salts such as sodium/calcium salts as Ca2+ ions are known to promote faster healing. The aims of this research were: 1- to provide a greater insight into the nature of binding between various ions (NaT, Ca2+ as well as Zn2+ and Ag+) and the polysaccharide molecules. Interactions between alginate/pectin and alginate/CMC molecules were also

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Laidler, Steven. "Gastric mucin glycoform structure and interaction with alginate." Thesis, University of Newcastle Upon Tyne, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427330.

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Johnson, Fiona Ann. "The physico-chemical characterisation of alginate raft systems." Thesis, University College London (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297175.

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Tabriz, Atabak Ghanizadeh. "3D biofabrication of cell-laden alginate hydrogel structures." Thesis, Heriot-Watt University, 2017. http://hdl.handle.net/10399/3370.

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Biofabrication has been receiving a great deal of attention in tissue engineering and regenerative medicine either by manual or automated processes. Different automated biofabrication techniques have been used to produce cell-laden alginate hydrogel structures, especially bioprinting approaches. , These approaches have been limited to 2D or simple 3D structures, however. In this thesis, a new extrusion-based bioprinting technique and a new simple, manual 3D biofabrication method are presented to culture cells in 3D. These methods do not rely on any complex fabrication methods. The bioprinting

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Martins, Evandro. "Oil encapsulation in alginate membrane by inverse gelation." Nantes, 2015. http://www.theses.fr/2015NANT077F.

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L’encapsulation d’huile par gélification inverse consiste à ajouter, goutte-à-goutte, une émulsion de chlorure de calcium/huile dans un bain d’alginate. Lesions Ca2+ migrent ensuite à travers l’émulsion vers l’extérieur du bain et réticulent les macromoléculesd’alginate (gélification inverse). Des capsules millimétriques (3- 7 mm) avec une morphologie coeurcouronne sont ainsi formées. La production de capsules de taille inférieure à 1 mm par gélification inverse n’a cependant jamais été démontrée. L’intérêt des microcapsules repose sur un vaste champ d’applications pour lesquelles la capsule n

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Avakian, A. "3D-bioprinting system for fabrication of alginate microfibers." Thesis, АНПРЭ, ХНУРЭ, Издательство «Точка», 2017. http://openarchive.nure.ua/handle/document/4074.

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The given work is devoted to the theme of 3D-printing of alginate microfibers with encapsulated stem cells which are used for the nerve regeneration. The motorized printing device is developed and tested. The appropriate software controls the device and allows to design the printing structures.

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