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Dissertations / Theses on the topic 'Pigment'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Lawani, Leonard Olu. "Characterization of the Pigment-Protein and Pigment-ester of Xanthomonas Campestris Pv. Juglandis." Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc798279/.

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The objectives of this project were to develop a high performance liquid chromatographic method for separating the pigment esters mixture, to determine the locations of the pigment moiety in the isolated esters using pholosiphases, and to characterize the pigment-protein complex and determine its distribution in other bacteria. Saponification of the two pigment esters 1 and 2 with aqueous KOH yielded two free pigments on TLC plates developed by two solvent systems. The fasters moving of these two free pigments co-chromatographed with the one free pigment produced from each pigment ester by pho

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2

Tietz, Carsten. "Untersuchungen an einzelnen Pigmenten und Pigment-Protein-Komplexen." [S.l. : s.n.], 2000. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB9683615.

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3

Verger, Louisiane. "Les oxydes de chrome dans les pigments et les décors de porcelaine." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066546/document.

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Les oxydes de chrome permettent d’obtenir une large variété de couleurs, conduisant à leur utilisation répandue dans les arts céramiques. À la manufacture de Sèvres, leurs propriétés colorantes ont été explorées dès la découverte du chrome à la fin du 18ème siècle. Les travaux initiés par Brongniart ont conduit à une série de 76 pigments pour porcelaine composés d’oxydes de chrome, régulièrement synthétisés au laboratoire de la manufacture. Nous avons mené une étude exhaustive de ces pigments, permettant une classification basée sur leur analyse minéralogique et mettant en évidence le rôle du

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4

Schmitt, Franz-Josef [Verfasser], and Hans Joachim [Akademischer Betreuer] Eichler. "Picobiophotonics for the investigation of pigment-pigment and pigment-protein interactions in photosynthetic complexes / Franz-Josef Schmitt. Betreuer: Hans Joachim Eichler." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2011. http://d-nb.info/1014971691/34.

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5

Beauquier, Myriam. "Classification et description chimique des pigments des champignons." Paris 5, 1999. http://www.theses.fr/1999PA05P026.

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6

Hélot, Frédérique. "Les pigments minéraux." Paris 5, 1998. http://www.theses.fr/1998PA05P046.

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7

Hofmann, Clemens. "Pigment pigment interactions and protein dynamics in light harvesting complexes a single molecule study /." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971750483.

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8

Rizzo, Roberta Ferreira. "Produção de ficobiliproteínas por arthrospira platensis sob diferentes condições de luminação e avaliação de sua estabilidade, visando aplicação em alimentos." Niterói, 2017. https://app.uff.br/riuff/handle/1/3052.

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Submitted by Biblioteca da Faculdade de Farmácia (bff@ndc.uff.br) on 2017-03-14T18:27:56Z No. of bitstreams: 1 Rizzo, Roberta Ferreira [Dissertação, 2014].pdf: 3622671 bytes, checksum: 2e33786bbb464784e93274b48c446ebd (MD5)<br>Made available in DSpace on 2017-03-14T18:27:56Z (GMT). No. of bitstreams: 1 Rizzo, Roberta Ferreira [Dissertação, 2014].pdf: 3622671 bytes, checksum: 2e33786bbb464784e93274b48c446ebd (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Corantes são aditivos amplamente utilizados pelas indústrias de alimentos. O aumento de investimento em pesquisa

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9

Baker, Diane. "Studies of pigment-polymer interactions." Thesis, University of Dundee, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265594.

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10

Sarcina, Maria. "Pigment-protein interactions within photosystem II." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313030.

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11

Lane, Carol. "Transplantation of retinal pigment epithelial cells." Thesis, University of Southampton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316114.

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12

Nganou, Assonkeng Albert Collins [Verfasser], and Hans Joachim [Akademischer Betreuer] Eichler. "On the role of pigment-pigment and pigment-protein interaction in regulating excitation energy and electron transfer in photosynthesis / Albert Collins Nganou Assonkeng. Betreuer: Hans Joachim Eichler." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2012. http://d-nb.info/1019852917/34.

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13

Kahya, Sevinc Sevim. "Synthesis And Characterization Of Fluorescent Zinc Phthalocyanine Pigments And Its Combination Pigment With Mica Titania Pig Ment." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615041/index.pdf.

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In the present work, zinc phthalocyanine and tetra nitro substituted zinc phthalocyanine were sytnhesized by using phthalic anhydride and nitro phthalic acid precursor respectively under microwave irradiation. Molecular structures of these pigments were confirmed by FT-IR and UV-visible spectroscopy analyses. Furthermore, these pigments were deposited on mica-titania pigment substrate in dimethyl formamide solvent to obtain the combination pigment. FT-IR analysis was conducted to analyze the deposition of pigments onto the mica-titania surfaces. Fluorescence spectroscopy analysis was performed

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14

Neveu, Arlette. "Le Champignon Pulcherricium caeruleum (Aphyllophorales) : étude de son pigment et d'un métabolite phénolique original." Bordeaux 2, 1995. http://www.theses.fr/1995BOR2B003.

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Pulcherricium caeruleum est un champignon lignicole de la famille des Corticiacées caractérisé par un carpophore résupiné bleu profond. Son pigment a étudié à partir de cultures en laboratoire sur un milieu gélosé à base de glucose et d'extrait de levure. La pigmentogenèse a été étudiée en fonction des éléments nutritifs du milieu et de son éclairement. L'instabilité de ce pigment dans certains solvants a été mise en évidence : elle a été attribuée à des phénomènes d'oxydo-réduction. L'interprétation de ses données spectroscopiques semble indiquer que le pigment de P. Caeruleum, de formule bru

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15

Joshua, Sarah. "Mobility of pigment-protein complexes in cyanobacteria." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444430/.

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Phycobilisomes, the light harvesting complexes of cyanobacteria are highly mobile, fluorescent complexes known to diffuse freely on the thylakoid membranes, interacting with the reaction centre complexes to mediate efficient photosynthesis. The primary aim of this project is to establish what processes require this rapid movement of the complexes using a number of genetic, biochemical and microscopic techniques. The cyanobacterial species used extensively in the work presented in this thesis are the fully sequenced, naturally transformable Synechocystis sp. PCC 6803 and Synechococcus sp. PCC 7

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16

Al-Hosaini, Heba. "Age-related changes in retinal pigment epithelium." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1444089/.

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The retinal pigment epithelium (RPE) is a monolayer of hexagonal organized cells located between the choriocapillaris and the neurosensory retina. As the RPE is implicated in a range of eye diseases, an understanding of its structure and ability for self renewal is critical for therapeutic strategies. Analysis of human RPE cells at the extreme periphery of the retina reveals a population larger in size than those in the centre, they are highly irregular and form an annulus of 4-5 mm. Although binucleation in humans is rare, 10% of these cells are binucleated. In the central region these large

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17

Donahue, Vicki S. "Phospholipase c activity in retinal pigment epithelium." Virtual Press, 1997. http://liblink.bsu.edu/uhtbin/catkey/1041916.

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The role of the retinal pigment epithelial cells on the viability and renewal of photoreceptors has been well demonstrated in the Royal College of Surgeons (RCS) strain of rat. These rats are characterized by an inherited time-dependent degeneration of their photoreceptors. This degeneration is apparently due to the inability of the retinal pigment epithelial cells to adequately ingest fragments of photoreceptor membrane that are shed during the course of photoreceptor membrane renewal. The buildup of photoreceptor material in the interphotoreceptor space ultimately leads to the degeneration o

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18

Altabet, Altaher Ibrahim. "Siderophore and pigment production by Candida albicans." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360169.

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19

Warner, Jacqueline. "Ionic transport across mammalian retinal pigment epithelium." Thesis, University of Westminster, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292857.

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20

Wood, Paula. "Mechanisms of visual pigment variation in teleosts." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261282.

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21

Chen, F. K. "Retinal pigment epithelium transplantation in retinal diseases." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1318070/.

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Age-related macular degeneration (AMD) and inherited macular diseases (IMD) are retinal disorders that can cause blindness through atrophy of the retinal pigment epithelium (RPE) or choroidal neovascularisation (CNV). RPE transplantation in severe forms of neovascular AMD has been performed with promising short-term outcomes. However, this approach has not been evaluated in atrophic types of AMD or IMD. Furthermore, the long-term outcomes of photoreceptors cell function rescue by RPE reconstruction in neovascular AMD is unknown. Current surgical techniques are complex with associated high comp

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22

Howells, Olivia. "New investigations into macular pigment optical density." Thesis, Aston University, 2012. http://publications.aston.ac.uk/16441/.

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Macular pigment (MP) is the collective name for three carotenoids, lutein, zeaxanthin and meso-zeaxanthin, which are found at high concentrations in the central macula. The macular carotenoids, like all carotenoids, are entirely of dietary origin. The term ‘macular pigment optical density’ (MPOD) refers to the peak concentration of MP in the retina, which varies from one individual to the next and is measurable in vivo. On account of its blue-light-filtering and antioxidant properties, MP has become a subject of interest with respect to age-related macular degeneration (AMD), the hypothesis be

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23

Cao, Qingqing. "An investigation of the environmentally friendly pigment colouration." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/an-investigation-of-the-environmentally-friendly-pigment-colouration(0be8445c-f36e-4c2f-ba60-234f25d1492e).html.

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This research has investigated the modification of cotton fabric and pigment dyeing system in order to improve the colouration properties, such as rub fastness, wash fastness, colour strength and fabric handle of the textile material. It involved four different approaches based on pre-cationization of the fabric, incorporation of crosslinkers into the binder formulation, UVO pre-treatment of the fabric, and wet fluorocarbon treatment and dry plasma polymerisation treatments.It has been reported that the Matrix OSD pigment dyeing system offers benefits in terms of processing cost and environmen

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24

Verger, Louisiane. "Les oxydes de chrome dans les pigments et les décors de porcelaine." Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066546.

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Les oxydes de chrome permettent d’obtenir une large variété de couleurs, conduisant à leur utilisation répandue dans les arts céramiques. À la manufacture de Sèvres, leurs propriétés colorantes ont été explorées dès la découverte du chrome à la fin du 18ème siècle. Les travaux initiés par Brongniart ont conduit à une série de 76 pigments pour porcelaine composés d’oxydes de chrome, régulièrement synthétisés au laboratoire de la manufacture. Nous avons mené une étude exhaustive de ces pigments, permettant une classification basée sur leur analyse minéralogique et mettant en évidence le rôle du

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25

Ahmadiani, Neda. "RED CABBAGE ANTHOCYANINS: HORTICULTURAL AND CHEMICAL FACTORS AFFECTING COLOR CHARACTERISTICS OF CRUDE EXTRACTS, SELECT PIGMENT MIXTURES, AND ISOLATED PIGMENTS." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437655932.

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26

Aman, Zaeem. "Efficiency of Fluorescent Whitening Agents in Pigment Coatings." Thesis, Karlstads universitet, Fakulteten för teknik- och naturvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-14976.

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The objective of this work was to study the addition of fluorescent whitening agents (FWAs) for efficient use on pigment coating of paper substrates with low grammage and the goal was to achieve high optical response by using low amount of FWAs. A commercial light-weight coated (LWC) paper grade was provided by Stora Enso Corbehem Mill and isotropic laboratory sheets were produced at Stora Enso Research Centre using PFI sheet former. Optical properties such as brightness, whiteness and L, a* and b* colour space values were evaluated using Minolta spectrophotometer with D65 illuminant for both

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27

Camyab, Azad. "Corrosion of Al-Zn alloy pigment painted surfaces." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46696.

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28

Lightfoot, Ruth M. "Retinal pigment epithelial dystrophy (RPED) in the dog." Thesis, Royal Veterinary College (University of London), 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339266.

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29

Tovell, Victoria E. "Purinoceptor signalling in human retinal pigment epithelial cells." Thesis, University of East Anglia, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435973.

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30

Devine, Lesley. "Cellular interactions between lymphocytes and retinal pigment epithelium." Thesis, University College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338652.

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31

Sheridan, Carl Michael. "The retinal pigment epithelium and its extracellular matrix." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366682.

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32

Blackwell, John Justin. "The magnetic properties of metal particle pigment systems." Thesis, University of York, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274504.

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33

Figueira, Ana Cristina Oliveira Lopes. "Pigment metabolism in citrus and factors affecting regreening." Thesis, University of Lincoln, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312892.

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34

Hope, Michael. "The assessment of paediatric macular pigment optical density." Thesis, Aston University, 2017. http://publications.aston.ac.uk/38211/.

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Purpose: Dry age related macular degeneration (AMD) is the UK's leading cause of visual loss. Dry AMD accounts for approximately 90% of the 600,000 people affected by AMD in the UK. Macular pigment (MP) is believed to play a significant role in mitigating the onset and progression of AMD. Data available for paediatric MP is lacking, particularly in western ethnic populations. Method: This thesis set out to investigate macular pigment optical density (MPOD) at the early stage of life, to assist in understanding the evolution of MPOD in the human life span. The Visucam 200 (an objective techniqu

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35

Shahabi, G. "Dynamic features of the mature retinal pigment epithelium." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1352450/.

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The retinal pigment epithelium (RPE) is a monolayer of cells that are vital for visual function and play a key role in the maintenance of the photoreceptors. Within RPE cells are melanin granules which absorb stray light and minimise scatter within the eye, therefore, protecting the RPE from damage. Albinos lack this protective capacity of melanin as a result of mutations of the tyrosinase gene. The first half of this thesis investigates heterogeneity within the RPE in both pigmentation phenotypes. Furthermore, the effect of ageing on the RPE is examined. Immunohistochemistry highlighted the m

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36

Payne, Kathryn Elizabeth Ann. "Pigment-dispersant-solvent interactions appropriate to paint systems." Thesis, London South Bank University, 1998. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267389.

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37

Müller, Jeanette. "Characterization of the zebrafish pigment pattern mutant parade." Thesis, University of Bath, 2007. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442692.

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38

DERAY, PHILIPPE. "Les pigments dans le genre cortinarius (agaricales, basidiomycetes)." Strasbourg 1, 1991. http://www.theses.fr/1991STR15030.

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39

Santos, Luciane Rogéria dos. "Expressão gênica de receptor de melatonina (Mel1) e melanopsinas (Opn4x e Opn4m) em melanóforos de Xenopus laevis." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/41/41135/tde-09022011-104538/.

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Muitos vertebrados ectotérmicos ajustam suas cores corporais para serem confundidos com o ambiente, através da migração de pigmentos no interior de cromatóforos, regulada por sistemas neurais e/ou hormonais. Essas mudanças de coloração auxiliam no mimetismo, termorregulação, comunicação social e expressão de comportamentos como excitação sexual, agressividade e medo. Entretanto, cromatóforos de inúmeras espécies respondem diretamente à luz. Estudos sobre a resposta à luz nos melanóforos de Xenopus laevis levaram à descoberta do fotopigmento melanopsina, uma opsina que está presente na retina d

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40

Moraes, Maria Nathália de Carvalho Magalhães. "Efeito da endotelina sobre a expressão gênica das melanopsinas (Opn4x e Opn4m) e do receptor de endotelina, subtipo ETc, em melanóforo de Xenopus laevis." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/41/41135/tde-18022011-104223/.

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Os relógios biológicos são fundamentais para a sincronização do comportamento dos organismos a mudanças no fotoperíodo. Todas as alterações rítmicas são determinantes para a sobrevivência da espécie uma vez que elas prevêem que os ajustes internos coincidam com a fase mais propícia do ciclo ambiental, permitindo aos organismos a capacidade de sincronizar esses eventos internos com os ciclos ambientais. Muitos desses ritmos biológicos são claramente associados ao ciclo claro-escuro, sendo este ciclo de grande importância para as espécies que possuem algum tipo de pigmento fotossensível. Os mela

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41

Juin, Camille. "Extraction, identification et caractérisation pharmacologique de pigments de Porphyridium purpureum sur cellules de mélanome humain." Thesis, La Rochelle, 2015. http://www.theses.fr/2015LAROS018/document.

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20 000 Européens meurent chaque année du mélanome et le taux de mortalité ne cesse de s’accroître. Les cellules de mélanome se caractérisent principalement par la mutation des kinases RAS, B-RAF et RHO-B. Ces mutations leur confèrent une résistance aux agents chimiothérapeutiques. Un grand nombre de travaux a établi que les pigments d’algues présentent un intérêt majeur pour prévenir, diagnostiquer et traiter les cancers. L’objectif de ce travail de thèse est de réaliser un travail de recherche intégré pour identifier des pigments de microalgues pouvant présenter un intérêt pour le diagnostic

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42

Guillermin, David. "Le rôle des matériaux hybrides à base d'argiles dans la protection des œuvres d'art." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS288/document.

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Le travail de cette thèse s’intéresse à la stabilisation de plusieurs pigments hybrides.Une première partie traite de pigment obtenu à l’aide de l’acide carminique et de la montmorillonite, une argile commune. Un procédé d’inversion de la charge de surface de l’argile avec un polymère cationique, ou l’utilisation d’argiles modifiées par des polycations de Titane et d’Aluminium, permettent l’élaboration du pigment. La résistance des pigments à la photodégradation est alors testée. Les techniques couplées de RMN, DRX, FTIR et d’EPR permettent d’éclairer l’agencement des molécules organiques sur

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43

Rosic, Nedeljka. "Molecular breeding of cytochrome P450s for indigoid pigment production /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18978.pdf.

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44

Hamey, Rhye Garrett. "Production of organic pigment nanoparticles by stirred media milling." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011903.

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45

Wänstrand, Ingrid. "Pigment and Thiamine Dynamics in Marine Phytoplankton and Copepods." Doctoral thesis, Uppsala universitet, Evolutionsbiologi, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4560.

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Based on a field study and several mesocosm experiments, I evaluated the use of pigments as chemotaxonomical biomarkers for phytoplankton community composition in the Baltic Sea and I examined effects of inorganic nutrients on the dynamics of carotenoids and thiamine (vitamin B1) at the phytoplankton–copepod level in marine pelagic food webs. My results show that HPLC pigment analysis combined with CHEMTAX data processing was an accurate alternative to microscopic analysis of Baltic Sea phytoplankton. Experimental supply of N, P and Si affected copepod growth and biochemical status via changes

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46

Momin, Nasar, and nasarhm@gmail com. "Chitosan and improved pigment ink jet printing on textiles." RMIT University. Fashion and Textiles, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20081029.154501.

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The purpose of this research was to explore two ways of the application of chitosan, a biopolymer, for ink jet printing of textiles. 1) To apply chitosan as a post-treatment on the fabric ink jet printed with pigment based inks for the fixation of pigments on the fabric. 2) To incorporate chitosan as a binder in pigment based ink jet ink formulations. The incorporation of chitosan was carried out in two ways. 1) Direct addition of chitosan into the ink formulations containing surface modified pigments. 2) Preparation of chitosan encapsulated pigment nanoparticles using complex coacervation tec

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47

Wänstrand, Ingrid. "Pigment and thiamine dynamics in marine phytoplankton and copepods /." Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4560.

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48

Squarzoni, Paola. "Molecular Bases of Pigment Cell Specification in Ciona intestinalis." Thesis, Open University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504326.

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49

Ulbrich, Stefan, Jens Friedrichs, Monika Valtink, et al. "Retinal Pigment Epithelium Cell Alignment on Nanostructured Collagen Matrices." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-136023.

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We investigated attachment and migration of human retinal pigment epithelial cells (primary, SV40-transfected and ARPE-19) on nanoscopically defined, two-dimensional matrices composed of parallel-aligned collagen type I fibrils. These matrices were used non-cross-linked (native) or after riboflavin/UV-A cross-linking to study cell attachment and migration by time-lapse video microscopy. Expression of collagen type I and IV, MMP-2 and of the collagen-binding integrin subunit α2 were examined by immunofluorescence and Western blotting. SV40-RPE cells quickly attached to the nanostructured collag

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50

Turton, Toby J. "Effect of stabilizer and pigment on polymer photo-degradation." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310030.

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