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Dissertations / Theses on the topic 'Maleic acids'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Wang, Lili. "Adsorption of (poly)maleic acid and aquatic fulvic accids by goethite." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1302190533.

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2

Barcellos, Talita da Silva. "Eletrooxidação do ácido maleico utilizando diferentes composições de anodos dimensionalmente estáveis." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/59/59138/tde-11092009-110932/.

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Este projeto propôs a utilização de eletrodos de óxidos metálicos contendo RuO2 para realizar a eletrooxidacao do ácido maleico visando sua degradação total ou formação de produtos com menor grau de toxicidade. A oxidação de compostos fenólicos, clorados ou não, resultam em alguns produtos que interferem na mineralização completa das estruturas clorofenólicas, o ácido maleico, que é um dos principais intermediários obtidos depois da abertura do anel aromático. Os recobrimentos óxidos foram caracterizados por Microscopia Eletrônica de Varredura e Análise Dispersiva de Raios X. A caracterização

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3

Šikyňová, Martina. "Funkcionalizace polypropylenu maleimidy." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-432952.

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Diploma thesis deals with preparation of polypropylene functionalized by maleimides, based on the reaction between maleic anhydride and amine. The overview of functionalization of polypropylene by maleic anhydride by reactive extrusion and routes for the synthesis and utilization of maleimides are contained in the theoretical part. Samples of maleimide-functionalized polypropylene were prepared by reactive extrusion using low molecular weight amines (aniline and 4-aminophenol) and hight molecular weight polyether monoamines. Functionalized polypropylene samples were prepared by several methods

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4

Zhang, Baohua. "Metabolic Engineering for Fumaric and Malic Acids Production." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1346338118.

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5

Saayman, Maryna. "Characterisation of the malate transporter and malic enzyme from Candida utilis." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/16520.

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Dissertation (PhD)--University of Stellenbosch, 2005.<br>ENGLISH ABSTRACT: Yeast species differ remarkably in their ability to degrade extracellular dicarboxylic acids and to utilise them as their only source of carbon. The fission yeast Schizosaccharomyces pombe effectively degrades L-malate, but only in the presence of an assimilable carbon source. In contrast, the yeast Saccharomyces cerevisiae is unable to effectively degrade L-malate, which is ascribed to the slow uptake of L-malate by diffusion. In contrast, the yeast Candida utilis can utilise L-malate as the only source of carbon

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6

Yeniay, Secil. "Sulfonated Styrene-co-maleic Acid And Its Derivatives As Superplasticizers In Concrete." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/2/12609455/index.pdf.

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In the past three decades, a new group of concrete admixtures, termed &ldquo<br>superplasticizers&rdquo<br>, were introduced to the concrete industry. They have gained wide acceptance because of their many advantages. The addition of superplasticizers to concrete improves the workability and strength of concrete. In this study, the effect of the chemical structure of poly (4-styrenesulfonic acid-co-maleic acid) sodium salt (SSAMA), which contains both sulfonic and carboxylic acid groups, which is a new superplasticizer, was analyzed. Two different molecular weights of PEG (polyethylene glycol

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7

Charlton, Jack. "Solubilisation and characterisation of G-protein-coupled receptors using styrene maleic acid polymer." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6525/.

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Detergent-free solubilisation using a polymer of styrene maleic acid (SMA) has proven useful in the study of membrane proteins. SMA was employed to solubilise G-protein-coupled receptors (GPCRs) from mammalian cells, into SMA lipid particles (SMALPs). Optimal SMALP solubilisation conditions were determined to be 2 % (w/v) SMA, at 37 °C for 1 h retaining wildtype (WT)-like pharmacological profiles and conferring improved stability on GPCRs over detergent micelles. Endoplasmic reticulum (ER)-retention motifs –KDEL and –KHILFRRRRRGFRQ were found not to be applicable to all proteins. Study of SMAL

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8

Malibo, Petrus Molaoa. "Development of heterostructured tin oxide nanocatalysts for the synthesis of bio-based maleic acid." University of Western Cape, 2021. http://hdl.handle.net/11394/8438.

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Philosophiae Doctor - PhD<br>Maleic acid (MA) is a key intermediate for the synthesis of polyester resins, surface coatings, lubricant additives, plasticizers, copolymers, pharmaceuticals and agricultural chemicals. The current industrial production of MA is an energy-intensive gas-phase oxidation process of n-butane. The dwindling fossil resources and environmental issues have brought about a worldwide paradigm shift from fossil feedstocks to biomass resources for the sustainable production of fuel and chemicals. Furfural (FFR) and 5-hydroxymethylfurfural (HMF) are excellent biomass-derived p

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9

Lin, Yu-pin. "Over-expression and biophysical characterisation of membrane proteins solubilised in a styrene maleic acid polymer." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1738/.

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Membrane proteins are the gateways into cells and therefore a critical part of pharmaceutical research. Membrane proteins, in fact, have been shown to be the target of over 50% of all medicinal drugs. The development of drugs that acts on membrane proteins, however, has been limited by the lack of high resolution structural data. This lack of information results from a lack of a generic method to extract active membrane proteins from the cell membrane. We have developed a novel styrene maleic acid (SMA) / lipid particle system termed SMALP that preserves the structural and functional integrity

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10

Alramadan, Ghada. "The Effect of Styrene-Maleic Acid (SMA) Copolymers on Solubilizing Lipid Bilayers and Forming Nanodiscs." PDXScholar, 2018. https://pdxscholar.library.pdx.edu/open_access_etds/4843.

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Cell membranes, or plasma membranes, play an essential role in the structure and the function of living cells. In 1972, the fluid mosaic membrane model was the first unifying paradigm of membrane structure. It is no longer considered adequate because evidence of many non-homogeneous lipid structures in both natural and model membranes have been discovered over the past thirty years. The field of membrane biophysics now uses updated versions of the mosaic model, which consists of the complex mixture of different lipid species. The lipid species found in natural membranes produce a range of dyna

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11

Wang, Yutong. "The role of accessory proteins in controlling the thyroid hormone regulation of transcription of the malic enzyme gene." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1793.

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Thesis (Ph. D.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains vii, 106 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 83-102).

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12

Teo, Alvin Chen Kuang. "Detergent-free approach to the studies of bacterial cell division membrane proteins using styrene maleic acid copolymer." Thesis, University of Warwick, 2017. http://wrap.warwick.ac.uk/101773/.

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Membrane proteins represent a subset of proteins embedded in or associated with the biological membrane. Despite accounting for 30% of the prokaryotic and eukaryotic proteomes and over 50% of current therapeutic targets, the structural and functional studies of membrane proteins still largely lag behind their soluble counterparts. This is predominantly due to the challenges in the isolation and purification of these proteins from their native mmembrane environment. Traditionally, detergents are employed for the extraction of membrane proteins from the native membrane, with subsequent solubilis

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13

Mitsch, Michael James. "Characterization of the NADP+-dependent malic enzyme of Sinorhizobium (Rhizobium) meliloti and investigations into the requirements of malate uptake and malic enzyme activity in bacteroids /." *McMaster only, 2001.

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14

Issaadi, Kahina. "Étude des propriétés thermiques et de la morphologie des nanobiopolymères à base de poly acide lactique : effet de la composition et de la nature de la nanocharge." Thesis, Lorient, 2015. http://www.theses.fr/2015LORIS388/document.

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La thèse porte sur l’étude de la morphologie et des différentes propriétés thermiques, mécaniques et barrières à la vapeur d’eau des nanobiocomposites à base de poly acide lactique (pla). La première partie est consacrée au greffage de l’anhydride maléique (am) sur le poly acide lactique plagma et à la mise en oeuvre de nanobiocomposites pla/cloisites, plagma/cloisites et pla/plagma/cloisites en utilisant deux cloisites® différentes (c20a et c30b), préparés par voie fondue. Au travers des différentes techniques utilisées, les résultats révèlent que les nanobiocomposites pla/cloisites élaborés

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15

Pounder, Ryan J. "The synthesis and ring-opening polymerisation of novel cyclic esters from malic acid." Thesis, University of Warwick, 2010. http://wrap.warwick.ac.uk/34607/.

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The work in this thesis is directed towards the preparation of cyclic ester monomers using malic acid as a renewable resource. Their subsequent controlled ring-opening polymerisation (ROP) to yield functionalised poly(ester)s is studied and application in micellar self-assembly reported. Chapter 1 reviews the many synthetic strategies that have been employed in the preparation of functional glycolides, lactides, ε-caprolactones, δ-valerolactones and β-propiolactones. Their subsequent polymerisation and applications are also discussed. Chapter 2 describes the improved synthesis of 3-(S)- [(benz

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16

Clasen, Samuel Hammes. "Preparação e caracterização de blendas de amido termoplástico com poli (ácido lático) enxertado com anidrido maleico." reponame:Repositório Institucional da UFSC, 2014. https://repositorio.ufsc.br/xmlui/handle/123456789/123414.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2014.<br>Made available in DSpace on 2014-08-06T18:10:48Z (GMT). No. of bitstreams: 1 326338.pdf: 1069847 bytes, checksum: 23e89434346c5cf064279e82e34a9468 (MD5) Previous issue date: 2014<br>A utilização de materiais biodegradáveis e de fonte renovável, em diferentes setores industriais e comerciais, está em crescente avanço pela necessidade da diminuição dos impactos ambientais gerados em parte pela utilização de materiais petroquími

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17

Kunimasa, Junichi. "Pharmacokinetics and pharmacological effect of recombinant human granulocyte colony-stimulating factor conjugated to poly (styrene-co-maleic acid) in rats." Kyoto University, 2001. http://hdl.handle.net/2433/150596.

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18

Goes, Mario Fernando de 1954. "Efeito do tempo na qualidade do condicionamento promovido pelos acidos fosforico e maleico em esmalte e dentina." [s.n.], 1994. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290534.

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Tese (livre-docencia) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-07-24T00:13:29Z (GMT). No. of bitstreams: 1 Goes_MarioFernandode_LD.pdf: 4259228 bytes, checksum: 595792dd13046cebba749d22e596c3b4 (MD5) Previous issue date: 1994<br>Resumo: O objetivo deste estudo foi avaliar a qualidade do condicionamento promovido pelos ácidos fosfórico a 35%, fosfórico a 10% e maleico a 10% sobre a superfície do esmalte e dentina, após 15 e 60 segundos de tratamento, usando microscópio eletrônico de verredura e ensaios de resistência ao ci

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19

Blower, Patrick. "Spectroscopic and Thermodynamic Studies of the Adsorption of Atmospherically Relevant Dicarboxylic Acids at the Vapor/Water Interface." Thesis, University of Oregon, 2013. http://hdl.handle.net/1794/13225.

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Many important atmospheric processes are determined by the chemical composition of aerosols, including organic material. Dicarboxylic acids are a commonly detected class of organic material in urban, rural, and remote sites across the globe. Understanding the surface behavior of these molecules is imperative in characterizing the atmospheric fate of these molecules in aerosols, especially at an aerosol surface. In fact, little is known about their orientation, solvation, or pH dependence. This dissertation explores in molecular level detail the concentration and pH behavior of low molecula

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20

Volschenk, Heinrich. "Characterisation of L-malic acid metabolism in strains of Saccharomyces and the development of a commercial wine yeast strain with an efficient malo-ethanolic pathway." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52728.

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Dissertation (PhD)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: L-Malic and tartaric acid are the most prominent organic acids in wine and playa crucial role in winemaking processes and wine quality, including the organoleptic quality and the physical, biochemical and microbial stability of wine. The production of premium wines depends on the oenologist's skill to accurately adjust wine acidity to obtain the optimum balance with other wine components to produce wine with optimum colour and flavour. Strains of Saccharomyces, in general, rarely degrade L-malic acid completely in

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21

Zahir, Aishath Zehereen. "Degradation of e-glass fibre in selected organic acids." Thesis, Curtin University, 2008. http://hdl.handle.net/20.500.11937/1654.

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E-glass has been widely used as a reinforcing material for years, especially as a plastic reinforcer in the production of GRP (Glass Reinforced Plastic). Failure of GRP materials under stress came in to the picture quite recently. Since then studies have been conducted in an attempt to understand the causes and the underlying behaviour.Except for the last section of the research (analysis using a kinetic approach) where glass fibre was cut out to weigh approximately 1.0g, standard sized specimens were soaked in the required acid solutions of desired concentrations for varying temperatures and

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22

Hahn, Christian Joachim [Verfasser]. "Polyesters Based on Malic Acid - Pendant Hydroxyl Groups as Distinctive Feature for Versatile Modifications / Christian Joachim Hahn." Aachen : Shaker, 2013. http://d-nb.info/1051574692/34.

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23

Zahir, Aishath Zehereen. "Degradation of e-glass fibre in selected organic acids." Curtin University of Technology, Department of Applied Chemistry, 2008. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=128425.

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E-glass has been widely used as a reinforcing material for years, especially as a plastic reinforcer in the production of GRP (Glass Reinforced Plastic). Failure of GRP materials under stress came in to the picture quite recently. Since then studies have been conducted in an attempt to understand the causes and the underlying behaviour.<br>Except for the last section of the research (analysis using a kinetic approach) where glass fibre was cut out to weigh approximately 1.0g, standard sized specimens were soaked in the required acid solutions of desired concentrations for varying temperatures

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24

Crumpton, Jason. "Click Chemistry on DNA and Targeting RNA structure with Peptide Boronic Acids." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/77076.

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The utilization of click chemistry to perform inter- and intramolecular ligation on DNA has become ubiquitous in the literature. Advances in copper (I) stabilizing ligands that prevent DNA degradation via redox pathways have provided nucleic acid researchers access to the efficiency and quantitative nature of the click reaction. The majority of ligation procedures in the literature are performed in solution after DNA assembly and modification with alkyne reporter groups. However, without specialty alkyne reagents that can be sequentially and selectively deprotected, the solution phase method r

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25

Crumpton, Jason B. "Click Chemistry on DNA and Targeting RNA structure with Peptide Boronic Acids." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/77076.

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The utilization of click chemistry to perform inter- and intramolecular ligation on DNA has become ubiquitous in the literature. Advances in copper (I) stabilizing ligands that prevent DNA degradation via redox pathways have provided nucleic acid researchers access to the efficiency and quantitative nature of the click reaction. The majority of ligation procedures in the literature are performed in solution after DNA assembly and modification with alkyne reporter groups. However, without specialty alkyne reagents that can be sequentially and selectively deprotected, the solution phase method r

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26

Sandéhn, Alexandra. "Capillary Organic Electronic Ion Pump for Delivering Malic Acid - Towards Better Understanding of Drought Tolerance in Tropical Plants." Thesis, Linköpings universitet, Laboratoriet för organisk elektronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-178191.

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Delivery of biologically relevant ions such as drugs, neurotransmitters and hormones have been recognized as powerful a tool to control physiology of animals and plants for research purposes and practical applications. In the plant research community, ions are most commonly delivered as part of a solvent by soaking, spraying, pipetting or by adding to the soil. These methods have low control of the delivery dynamics and quantity of ion uptake. These issues motivated the development of the Organic Electronic Ion Pump (OEIP), which delivers only ions of interest by applying an external electric

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27

Hassan, Anwar I. "Development of ¹⁹F NMR Methods for the Study of GlpG Rhomboid Protease in Detergents and Lipid Nanoparticle Systems." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42521.

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Rhomboids are a family of intramembrane serine proteases that cleave transmembrane protein substrates within the lipid membrane. They are involved in a wide range of biological processes, including signal transduction, parasite invasion, bacterial quorum sensing and apoptosis. While previous X-ray crystal structures and functional studies have provided some detailed insights into the mechanism of intramembrane hydrolysis, it is still not clear how the transmembrane substrate can gain access into the active site from the lipid environment. While several modes of action have been suggested, one

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28

Coetzee, Zelmari. "Site and vintage response of malic and tartaric acid in Vitis vinifera L. cv’s Cabernet Sauvignon and Sauvignon blanc." Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85736.

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Thesis (MScAgric)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Acids are one of the major components that originate largely from the berry, that are found in wine, and that influence the sensory perception. The presence of organic acids in adequate concentrations in the grape berry, of which tartaric- and malic acid are the main organic acids present, is important as this determines the potential of a must to produce a good and stable wine. The effect of temperature on the organic acid content of the must is widely discussed with higher temperatures in general being associated wi

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29

Goetz, Lee Ann. "Preparation and analysis of crosslinked lignocellulosic fibers and cellulose nanowhiskers with poly(methyl-vinyl ether co maleic acid) â " polyethylene glycol to create novel water absorbing materials." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45893.

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The search for cellulosic based products as a viable alternative for petroleum-based products was the impetus for covalently crosslinking lignocellulosic fibers and nanocellulose whiskers with poly(methyl vinyl ether) co maleic acid (PMVEMA) - polyethylene glycol (PEG). The lignocellulosics used were ECF bleached softwood (pine) and ECF bleached birch kraft pulp. This thesis also tests the hypothesis that water absorption and retention can be improved by grafting PMVEMA-PEG to the surface of ECF bleached kraft pulp hardwood and softwood fibers via microwave initiated crosslinking. The cross

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30

Duchêne, Eric. "Une exploration des possibilités génétiques pour l'adaptation de la vigne au changement climatique." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAJ059/document.

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Les effets du changement climatique ont d’ores et déjà été observés sur la vigne : avancement des stades de développement, augmentation des teneurs en alcool des vins, baisse excessive de leur acidité. Une des voies d’adaptation possible de la viticulture est la création de nouvelles variétés. J’ai caractérisé la variabilité phénotypique de 120 descendants de croisements entre Riesling (RI) et Gewurztraminer (GW) pour (1) les stades de développement, décrits à l’aide de sommes de températures (2) la capacité à accumuler des sucres dans les raisins (3) les paramètres de l’acidité des raisins. L

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31

Chabert, Adèle. "Traitement biosourcé du Hêtre par la formation in situ de polyesters à base d’Acide Malique - Étude du procédé et des propriétés physiques conférées, du petit échantillon à l’échelle de la planche." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0252.

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Le bois est un matériau hygroscopique dont les dimensions varient avec les conditions hygrothermiques de l'environnement qui l'entoure. Une des essences les plus nerveuses en France est le hêtre. Il est très abondant en Europe, peu durable, et nécessite donc une protection additionnelle pour améliorer sa durabilité et étendre son utilisation. Ce travail de thèse a étudié plusieurs traitements biosourcés par la formation in situ de polyesters à base d'acide malique. Deux types d'alcool ont été utilisés, l'un ramifié, le glycérol, l'autre linéaire, le 1,4-butanediol, afin d'observer si une plus

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32

Matláková, Jana. "Modifikace PLA reaktivní extruzí." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216866.

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Diplomová práce se zabývá roubováním maleinanhydridu a anhydridu kyseliny itakonové na kyselinu poly(mléčnou) (PLA). U modifikované kyseliny poly(mléčné) byla sledována závislost konverze monomerů na různých molárních poměrech monomer/iniciátor při teplotách 180°C a 200°C. Množství naroubovaného monomeru bylo stanovováno acidobazickou titrací a pomocí FT-IR spektroskopií. Vliv stupně naroubování na krystalinitu modifikované PLA byl zjišťován pomocí diferenční kompenzační kalorimetrie, DSC. Degradace PLA byla orientačně pozorována pomocí indexu toku taveniny, MFI.

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33

Reghizzi, Bruno. "Selective oxidation of furfural and 5-methylfurfural under green conditions." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13421/.

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Bio-renewable fuels and chemicals are becoming increasingly important as humans continue to deplete petroleum resources. An important aim for the future is to develop new processes from biomass and use it as a versatile feedstock because it is the largest carbon resources on earth. The increasing cost of fossil fuels and concerns about their environmental impact are accelerating the transition to a biomass-based economy. While fuel production from biomass has gained much attention, the use of renewable resources is also very important for the production of chemicals. Typically, chemical interm

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34

Horáček, Pavel. "Studium produkce extracelulárních polymerů pomocí mikroorganismu Aureobasidium pullulans." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216967.

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The diploma thesis is focused on the study of the influence of cultivation conditions and arrangement for the production of extracellular polymeric substances by using yeast-like microorganism Aureobasidium pullulans. In the theoretical part a brief description of A. pullulans, its use in biotechnology and produced exobiopolymers, especially pullulan and poly-L-malic acid are presented. The first aim of the experimental part was to set the most appropriate cultivation conditions for A. pullulans CCM 8182. Growth and production properties in optimum conditions were compared with cultivation on

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35

Al-Hossain, Md Shahriar. "Study of superconducting and electromagnetic properties of un-doped and organic compound doped MgB₂ conductors." Access electronically, 2008. http://ro.uow.edu.au/theses/90.

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36

Zhang, Shuo. "Physical properties and crystallization of theophylline co-crystals." Licentiate thesis, KTH, Transport Phenomena, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-13255.

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<p>This work focuses on the physical properties and crystallization of theophyline co-crystals. Co-crystals of theophylline with oxalic acid, glutaric acid and maleic acid have been investigated.</p><p>The DSC curves of these co-crystals show that their first endothermic peaks are all lower than the melting temperature of theophylline. The decomposition temperature of theophylline – oxalic acid co-crystal is at about 230 °C, determined by DSC together with TGA. After decomposition, the remaining theophylline melts at about 279 °C, which is higher than the known melting temperature of theophyll

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37

Hossain, Mahmud. "Characterization of non-protein coding ribonucleic acids by their signature digestion products and mass spectrometry." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1204947468.

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38

Kniel, Kalmia Elisabeth. "Evaluation of chemical treatments and ozone on the viability of Cryptosporidium parvum oocysts in fruit juices." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/27243.

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<i>Cryptosporidium parvum</i> is a protozoan parasite historically associated with waterborne and more recently foodborne outbreaks of diarrheal illness. Contamination of certain foods, such as unpasteurized apple cider, with infective oocysts may occur as oocysts are shed in the feces of common ruminants like cattle and deer that graze in and around orchards. Cryptosporidiosis can result in a severe illness for previously healthy individuals and a life-threatening illness in immunocompromised individuals. Disease occurs after the ingestion of small infective oocysts (4 to 5 mm in size). The r

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39

Nugroho, Robertus Wahyu Nayan. "Steric Stabilization of Polylactide particles achieved by Covalent 'grafting-from' with Hydrophilic Polymers." Licentiate thesis, KTH, Polymerteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122429.

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Despite numerous advantages of using particles in a wide range of applications, they have one drawback that is their tendency to agglomerate. One way to overcome this problem is to sterically stabilize the particles by introducing polymeric chains covalently attached to the surface. Surface modification by covalently attaching polymer chains to the particle surface can be achieved by e.g. a ‘grafting-from’ technique under UV irradiation. In this thesis, polylactide (PLA) particles were surface modified, under UV irradiation, with the hydrophilic monomers: acrylamide (AAm), acrylic acid (AA),

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Isreb, Abdullah. "The use of solubility parameters to predict the behaviour of a co-crystalline drug dispersed in a polymeric vehicle : approaches to the prediction of the interactions of co-crystals and their components with hypromellose acetate succinate and the characterization of that interaction using crystallographic, microscopic, thermal, and vibrational analysis." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5525.

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Dispersing co-crystals in a polymeric carrier may improve their physicochemical properties such as dissolution rate and solubility. Additionally co-crystal stability may be enhanced. However, such dispersions have been little investigated to date. This study focuses on the feasibility of dispersing co-crystals in a polymeric carrier and theoretical calculations to predict their stability. Acetone/chloroform, ethanol/water, and acetonitrile were used to load and grow co-crystals in a HPMCAS film. Caffeine-malonic acid and ibuprofennicotinamide co-crystals were prepared using solvent evaporation

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Tsukamoto, Junko, Sophie Heabel, Gustavo P. Valenca, Martin Peter, and Telma Franco. "Enzymatic direct synthesis of acrylic acid esters of mono- and disaccharides." Universität Potsdam, 2008. http://opus.kobv.de/ubp/texte_eingeschraenkt_verlag/2010/4265/.

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BACKGROUND: There is an increased need to replace materials derived from fossil sources by renewables. Sugar-cane derived carbohydrates are very abundant in Brazil and are the cheapest sugars available in the market, with more than 400 million tons of sugarcane processed in the year 2007. The objective of this work was to study the preparation of sugar acrylates from free sugars and free acrylic acid, thus avoiding the previous preparation of protected sugar derivatives, such as glycosides, or activated acrylates, such as vinyl acrylate. RESULTS: Lipase catalyzed esterification of three mono-

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Reyes, Martinez Juana. "Photobacterium damselae alpha2,6-sialyltransferase and Trypanosoma cruzi trans-sialidase in the synthesis of sialyloligosacharides." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/photobacterium-damselae-alpha26sialyltransferase-andtrypanosoma-cruzi-transsialidase-in-the-synthesis-ofsialyloligosacharides(d61a4152-1819-4264-a49f-2680cc48c52c).html.

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Sialic acids are involved in many biological processes. In glycoproteins and glycolipids they are essential for signalling and mediate molecular interactions as well as being targets for many pathogens such as influenza virus. The synthesis of sialylated glycoconjugates is of great importance. The incorporation of sialic acid through chemical synthesis carries several difficulties, enzymatic strategies using glycosyltransferases are very attractive alternative strategy, and have been used on a broad range of substrates forming glycosidic linkages with regio-and stereo-specificity. The work pre

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Lautrette, Guillaume. "Capsules hélicoïdales auto-organisées par repliement d’oligoamides aromatiques pour la reconnaissance moléculaire." Thesis, Bordeaux 1, 2013. http://www.theses.fr/2013BOR14850/document.

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La reconnaissance moléculaire constitue l’une des questions fondamentales les plus discutées dans le domaine de la chimie supramoléculaire. Cette thèse présente la conception, la synthèse et l’étude des propriétés de capsules hélicoïdales auto-organisées par repliement d’oligoamides aromatiques. Ces récepteurs sont constitués d’une chaîne oligomérique se repliant en hélice et comprenant une séquence d’unités codant pour des diamètres différents. Le repliement de l’oligomère donne naissance à une cavité pouvant accueillir des molécules invitées. La grande modularité des séquences, permettant un

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Young, Reuben Sam Erskine. "Mapping changes to lipid metabolism within cancer using next-generation mass spectrometry technologies." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/225933/1/Reuben_Young_Thesis.pdf.

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This thesis developed new methods to probe the molecular structure of lipids (fats) that are key components of cellular membranes. Applications of these technologies led to the discovery of previously undescribed lipids and allowed the mapping of their formation and fate in cancer cells and tissues. These fundamental insights into cancer metabolism suggest new targets for the detection and treatment of cancer.

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Ayoub, Nadim. "Synthèse et valorisation des dérivés furaniques issus de la biomasse par oxydations sélectives." Electronic Thesis or Diss., Compiègne, 2022. http://www.theses.fr/2022COMP2677.

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La biomasse fait partie des ressources renouvelables qui peuvent répondre durablement à nos besoins de production de carburants, de produits chimiques et de matériaux. En effet, la biomasse non comestible telle que la lignocellulose a attiré l'attention des chercheurs et des scientifiques au cours des dernières décennies en tant qu'alternative renouvelable. Le furfural et le 5-hydroxyméthylfurfural (HMF), dérivés de la déshydratation des pentoses et des hexoses respectivement, sont produits à plusieurs millions de tonnes par an. Ces derniers composés sont donc des molécules plateformes et repr

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Oursel, Delphine. "Influence de l’expression de l’ATP synthétase sur la composition lipidique des membranes bactériennes chez Escherichia coli : Identification et quantification relative des phospholipides et acides gras constitutifs par spectrométrie de masse." Rouen, 2008. http://www.theses.fr/2008ROUES062.

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Depuis quelques années, la recherche de préférences lipidiques de protéines et/ou d’enzymes membranaires suscite un intérêt grandissant, ces phénomènes d’affinité étant susceptibles d’induire la formation de domaines lipidiques dans les membranes biologiques. C’est pourquoi, nous avons cherché à savoir si l’ATP-synthétase, protéine membranaire, était capable d’induire des domaines lipidiques dans un modèle cellulaire, la bactérie d’E. Coli. Ainsi, l’influence de l’expression de cette protéine a été évaluée au moyen de 4 souches bactériennes; la souche sauvage ainsi que 3 souches génétiquement

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Ibrahim, Mohamed Asim Y. "Co-processing of drugs and co-crystal formers and its effect on pharmaceutical dosage-form performance. Co-crystallization of urea/ 2-methoxybenzamide, caffeine/ malonic acid, caffeine/ oxalic acid and theophylline/ malonic acid systems: Solid-state characterization including imaging, thermal, X-ray and Raman spectroscopic techniques with subsequent evaluation of tableting behaviour." Thesis, University of Bradford, 2008. http://hdl.handle.net/10454/12760.

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This dissertation has focused on the solid-state characterization of different co-crystal system as well as the effect of co-crystallization of these systems on pharmaceutical dosage form performance. Urea/ 2-MB, caffeine/ malonic acid, caffeine/ oxalic acid and theophylline/ malonic acid co-crystals were prepared using co-grinding- and co-precipitation techniques. In addition, the synthesis of co-crystals through two novel methods has been demonstrated. This includes compaction and convection mixing. The solid-state characterization of the co-crystals has been carried out using XRPD, Raman sp

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Dema, Haythem Karim. "Chiral aldimines in diastereoselective carbon nucleophile additions." Doctoral thesis, Universidad de Alicante, 2012. http://hdl.handle.net/10045/27136.

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Ibrahim, Mohamed Asim Yousif. "Co-processing of drugs and co-crystal formers and its effect on pharmaceutical dosage-form performance : co-crystallization of urea/2-methoxybenzamide, caffeine/malonic acid, caffeine/oxalic acid and theophylline/malonic acid systems : solid-state characterization including imaging, thermal, X-ray and Raman spectroscopic techniques with subsequent evaluation of tableting behaviour." Thesis, University of Bradford, 2008. http://hdl.handle.net/10454/12760.

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This dissertation has focused on the solid-state characterization of different co-crystal system as well as the effect of co-crystallization of these systems on pharmaceutical dosage form performance. Urea/ 2-MB, caffeine/ malonic acid, caffeine/ oxalic acid and theophylline/ malonic acid co-crystals were prepared using co-grinding- and co-precipitation techniques. In addition, the synthesis of co-crystals through two novel methods has been demonstrated. This includes compaction and convection mixing. The solid-state characterization of the co-crystals has been carried out using XRPD, Raman sp

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Kononenko, Inna. "Molecular charecterization and ageing of the sandarac resin and its principal component communic acid." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066403/document.

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La composition chimique de la résine sandaraque et de son composant principal l’acide communique a été étudiée par chromatographie en phase gazeuse – spectrométrie de masse (GC-MS), MALDI-TOF (désorption-ionisation laser assistée par matrice - temps de vol), ESI (ionisation par électronébuliseur) - Orbitrap, FTIR/ATR (spectroscopie infrarouge à transformée de Fourier/réflectance totale atténuée), spectroscopie de RMN (résonance magnétique nucléaire) à l'état solide et liquide. Six composés avec des squelettes labdane et pimarane ont été identifiés dans la résine commerciale. Les spectres de ma

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