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Dissertations / Theses on the topic 'Atomic content'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Siaka, I. Made, of Western Sydney Nepean University, and Faculty of Science and Technology. "The application of atomic absorption spectroscopy to the determination of selected trace elements in sediments of the Coxs River Catchment." THESIS_FST_XXX_Siaka_I.xml, 1998. http://handle.uws.edu.au:8081/1959.7/238.

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An investigation of heavy metal concentrations in sediments from Coxs River catchment, a tributary of the Hawkesbury-Nepean River system, has been undertaken. A number of digestion methods were assessed for the determination of Pb, Cu, Cd, Zn, Ni, Mn, Fe, Co and Cr in reference materials by flame AAS. The method that produced the best recovery is reverse aqua regia, HNO3-HC1 with ultrasonification followed by heating on a hotplate. Based on analysis of sediments from 133 sites, background concentrations were established. Elevated heavy metal concentrations were recorded in some samples. The th

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2

Palm, Elise. "Comparison of Mineral- and Protein Content between Conventional, Organic and Biodynamic Swedish Winter Wheat with Atomic Absorption Spectrophotometry and Elemental Combustion Analysis." Thesis, University of Kalmar, School of Pure and Applied Natural Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-2429.

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<p> </p><p>Correlation between production method and mineral-, cadmium- and protein content were sought for Swedish winter wheat. The wheat was grown according to conventional, organic or biodynamic principles. The minerals; iron, zinc, magnesium, copper and the heavy metal cadmium were analyzed with atomic absorption spectroscopy. Protein was analyzed with elemental combustion analysis. All together, 17 samples were analyzed; nine from the still ongoing Bollerup field trial in Skåne and eight from four different farm pairs in the midst of Sweden.</p><p>The Bollerup field trials showed that or

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3

Dhakal, Dileep, Thomas Waechtler, Schulz Stefan E, et al. "Surface chemistry of a Cu(I) beta-diketonate precursor and the atomic layer deposition of Cu2O on SiO2 studied by x-ray photoelectron spectroscopy." Universitätsbibliothek Chemnitz, 2014. http://scitation.aip.org/content/avs/journal/jvsta/32/4/10.1116/1.4878815?aemail=author.

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This article has been published online on 21st May 2014, in Journal of Vacuum Science & Technology A: Vac (Vol.32, Issue 4): http://scitation.aip.org/content/avs/journal/jvsta/32/4/10.1116/1.4878815?aemail=author DOI: 10.1116/1.4878815 This article may be accessed via the issue's table of contents at this link: http://scitation.aip.org/content/avs/journal/jvsta/32/4?aemail=author The surface chemistry of the bis(tri-n-butylphosphane) copper(I) acetylacetonate, [(nBu3P)2Cu(acac)], and the thermal atomic layer deposition (ALD) of Cu2O using this Cu precursor as reactant and wet oxygen as co-

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4

Perez, Sira Elevina E. "Determination of the correlation between amylose and phosphorus content and gelatinization profile of starches and flours obtained from edible tropical tubers using differential scanning calorimetry and atomic absorption spectroscopy." Online version, 2000. http://www.uwstout.edu/lib/thesis/2000/2000pereze.pdf.

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5

Cevik, Muammer Ozgur. "Effects Of Neuropeptide-y (npy) On Bone Metabolism As A Neuromediator- A Definitive Study." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/3/12604861/index.pdf.

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In order to elucidate the effects of NPY directly on bone tissue, two different doses of NPY (NPY dose 1= 1X10-5 M and NPY dose 2 = 1X 10&amp<br>#65533<br>6 M) and NPY dose 2 plus its inhibitor were applied together with hyaluronic acid (HA) into the intramedullary area of right tibia of Wistar rats. HA alone was administered as the control group. On three time points, day one, week one and week two after administration, the tibiae were collected and stored at &amp<br>#65533<br>20oC for analysis. Evaluation was performed via conventional radiography, dual energy X-ray absorbtiometry (DEXA),

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6

Maier, Sabine. "Contact dynamics from the atomic scale to nanostructured surfaces /." Basel : [s.n.], 2007. http://edoc.unibas.ch/diss/DissB_7790.

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7

Yang, Yongxin. "Knowledge sharing : from atomic to parametrised context and shallow to deep models." Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/25988.

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Key to achieving more effective machine intelligence is the capability to generalise knowledge across different contexts. In this thesis, we develop a new and very general perspective on knowledge sharing that unifi es and generalises many existing methodologies, while being practically effective, simple to implement, and opening up new problem settings. Knowledge sharing across tasks and domains has conventionally been studied disparately. We fi rst introduce the concept of a semantic descriptor and a flexible neural network approach to knowledge sharing that together unify multi-task/multi-d

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8

Foster, Adam Stuart. "Theoretical modelling of non-contact atomic force microscopy on insulators." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394160.

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9

Janvier, Camille. "Coherent manipulation of Andreev Bound States in an atomic contact." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS217/document.

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Des états électroniques localisés apparaissent dans les liens faibles entre électrodes supraconductrices : les états d’Andreev. Les expériences présentées dans cette thèse explorent les propriétés de cohérence quantique de ces états, en utilisant comme liens faibles des contacts à un atome entre des électrodes d’aluminium. Les contacts atomiques sont intégrés dans une cavité microonde qui permet à la fois de les isoler et de les sonder.Dans une première série d’expériences, il est montré qu’on peut utiliser les états d’Andreev pour définir un bit quantique, le « qubit d’Andreev », qu’on contrô

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10

Glover, Christopher Cash. "Investigation of a Contact Resonance Atomic Force Microscopy Scan Speed Phenomenon." Thesis, University of Nevada, Reno, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10813816.

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<p> There are many unexplained phenomena that have been observed via atomic force microscopy (AFM) experiments. Understanding the cause of these phenomena is important to perform more accurate quantitative imaging using contact-resonance AFM and other contact-mode AFM techniques at higher scan speeds. This thesis presents evidence to confirm the existence of a scan speed dependent contact-mode AFM phenomenon and applies a squeeze film hydrodynamic lubrication model to explain it. Contact-resonance spectroscopy is used to investigate the phenomenon in which, above a critical scan speed, there i

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11

Jiang, Wen. "Simulations of Indentation at Continuum and Atomic levels." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26350.

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The main goal of this work is to determine values of elastic constants of orthotropic, transversely isotropic and cubic materials through indentation tests on thin layers bonded to rigid substrates. Accordingly, we first use the Stroh formalism to provide an analytical solution for generalized plane strain deformations of a linear elastic anisotropic layer bonded to a rigid substrate, and indented by a rigid cylindrical indenter. The mixed boundary-value problem is challenging since the deformed indented surface of the layer contacting the rigid cylinder is unknown a priori, and is to be det

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12

Koc, Mumin Mehmet. "Non contact atomic force microscopy investigation of silicon nanoparticles deposited on HOPG." Thesis, University of Leicester, 2015. http://hdl.handle.net/2381/36124.

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The aim of this thesis was to further our understanding on the surface dynamics of silicon nanoparticles deposited on Highly Oriented Pyrolytic Graphite (HOPG) using non-contact Atomic Force Microscopy (NC-AFM) with the longer term aim of developing practical applications. Silicon nanoparticles in liquid were produced using sputtering gas aggregation by co-depositing with water in an ultrahigh vacuum (UHV) environment (von Haeften 2009). Water was sprayed into the system with custom designed apparatus onto a cold target cooled with liquid Nitrogen (LN2) to form an ice matrix. The melt from thi

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13

Medendorp, Clare Aubrey. "ATOMIC FORCE MICROSCOPY METHOD DEVELOPMENT FOR SURFACE ENERGY ANALYSIS." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/185.

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The vast majority of pharmaceutical drug products are developed, manufactured, and delivered in the solid-state where the active pharmaceutical ingredient (API) is crystalline. With the potential to exist as polymorphs, salts, hydrates, solvates, and cocrystals, each with their own unique associated physicochemical properties, crystals and their forms directly influence bioavailability and manufacturability of the final drug product. Understanding and controlling the crystalline form of the API throughout the drug development process is absolutely critical. Interfacial properties, such as surf

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14

Bretheau, Landry. "Localized Excitations in Superconducting Atomic Contacts : Probing the Andreev Doublet." Palaiseau, Ecole polytechnique, 2013. http://pastel.archives-ouvertes.fr/pastel-00862029.

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Cette thèse décrit deux expériences mettant en lumière l'existence d'un degré de liberté fermionique dans l'effet Josephson: le doublet d'Andreev. Elles sont toutes les deux réalisées sur l'élément Josephson le plus élémentaire qui soit, un contact atomique entre deux électrodes supraconductrices. Dans la première, nous avons observé la disparition du supercourant, qui traduit le piégeage spontané d'une quasiparticule dans l'un des deux états liés d'Andreev. Dans la seconde, nous avons réalisé la spectroscopie photonique de ce système à deux niveaux, en utilisant une jonction Josephson à la fo

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15

Dai, Zhenting. "Coherent and Dissipative Transport in Metallic Atomic-Size Contacts." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/19880.

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Thin-film niobium mechanically controlled break junctions and resistively shunted niobium mechanically-controlled break junctions were developed and successfully microfabricated. Using these devices, high-stability atomic size contacts were routinely produced and investigated both in the normal and superconducting states. Investigations of the two-level conductance fluctuations in the smallest contacts allowed the calculation of their specific atomic structure. Embedding resistive shunts close to the superconducting atomic-sized junctions affected the coherence of the electronic transport. Fin

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16

Egli, Katrin Silvia. "Evaluation of a model for canine atopic dermatitis in genetically predisposed Beagle dogs /." Bern : [s.n.], 2002. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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17

Gal, Andrei Yurievich. "The mechanisms of contrast formation in non-contact atomic force microscopy on insulating surfaces." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444688/.

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This work considers the problem of the prediction and interpretation of atomic resolution in NC-AFM images of ionic surfaces and adsorbed molecules, and the relation between atomic resolution and electronic properties of the system. Several tip models were studied over the MgO(OOl) surface, where models giving the strongest contrast were selected. The oxide tip model and the model of a Si tip with a dangling bond were used in further investigation of clean surfaces, single adsorbed molecules, and molecular monolayers. Ab initio calculations based on density functional theory were used extensiv

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18

Donev, Jason Matthew Kaiser. "Non-contact atomic force microscopy studies of amorphous solid water deposited on Au(111) /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/9779.

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Ai, Yong. "Approach to control, protect and switch charge transport through molecular junctions and atomic contact." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC125/document.

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Ces dernières décennies, l'électronique moléculaire a suscité un intérêt croissant. La construction de jonctions métal / molécules / métal est une étape fondamentale dans la compréhension de ce domaine. Nous avons été témoins d’avancées importantes concernant les jonctions moléculaires tant sur le plan théorique que sur le plan expérimental. Cette thèse se concentre principalement sur l'étude du transport de charge à travers les jonctions moléculaires. Des polymères conducteurs et des filaments de cuivre ont été déposés, par électrochimie avec un microscope électrochimique à balayage (SECM), e

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Liebig, Alexander [Verfasser], and Franz J. [Akademischer Betreuer] Gießibl. "From non-contact to contact - high-precision atomic force microscopy with atomically-characterized tips / Alexander Liebig ; Betreuer: Franz J. Gießibl." Regensburg : Universitätsbibliothek Regensburg, 2021. http://d-nb.info/1237884861/34.

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21

Remmert, Jessica Lynn. "Nano Thermal and Contact Potential Analysis with Heated Probe Tips." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14585.

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This work describes two closed-loop atomic force microscopy methods that utilize the heated silicon probe to interrogate surfaces. The first method identifies the softening temperatures of a selected polymer and organic substrate as a function of contact force and surface hardness. Motivation partly stems from nanosampling, which requires knowledge of phase-specific transitions to identify and extract mass from multicomponent systems for chemical analysis. In the second method, the cantilever is implemented as a Kelvin probe to study the effect of temperature on the measured contact potenti

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Abrams, Stephanie B. "Evaluation of Veterinary Allergen Extract Content and Resultant Canine Intradermal Threshold Concentrations." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524066093298819.

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23

Stomp, Romain-Pierre. "Dissipative and electrostatic force spectroscopy of InAs quantum dots by non-contact atomic force microscopy." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102180.

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This thesis is devoted to the studies of self-assembled InAs quantum dots (QD) by low-temperature Atomic Force Microscopy (AFM) in frequency modulation mode. Several spectroscopic methods are developed to investigate single electron charging from a two-dimensional electron gas (2DEG) to an individual InAs QD. Furthermore, a new technique to measure the absolute tip-sample capacitance is also demonstrated. The main observables are the electrostatic force between the metal-coated AFM tip and sample as well as the sample-induced energy dissipation, and therefore no tunneling current has to be col

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Vellame, Igor Alencar 1984. "Traços de íons em apatita = ataque químico, tratamento térmico e modelagem." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277143.

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Orientadores: Sandro Guedes de Oliveira, Julio Cesar Hadler Neto<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-21T04:43:57Z (GMT). No. of bitstreams: 1 Vellame_IgorAlencar_D.pdf: 6307121 bytes, checksum: 509c7cc3c5c11f238463340fa191af50 (MD5) Previous issue date: 2012<br>Resumo: O presente trabalho pode ser inserido na grande área de estudo da interação da radiação com sólidos. Ele tem como principal objetivo entender a cinética de reconstituição dos danos causados por irradiação com íons ( traço latente) na

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Dujardin, Antoine. "Atomic force microscopy usage in a context of multi-mode and multi-sample correlative measures on live cells." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I078/document.

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Assez rapidement après son apparition à la fin des années 1980, la Microscopie à Force Atomique (AFM) a démontré des perspectives prometteuses d’applications biomédicales. À l’heure actuelle, elle permet l’étude d’échantillons biologiques allant de la molécule unique à la cellule vivante proche des conditions physiologiques. Bien qu’étant applicable aux cellules eucaryotes et procaryotes, elle est entravée par son faible débit. Alors qu’elle peut être fortement automatisée sur certains échantillons bien caractérisés en air, l’automatisation de l’AFM en liquide reste rare, en particulier en mul

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Al-Amri, Mohammad Abdulla. "Atopic dermatitis : the role of contact allergy in disease and disease exacerbations." Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274922.

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27

Chauvin, Martin. "Effet Josephson dans les contacts atomiques / The Josephson Effect in Atomic Contacts." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00107465.

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L'effet Josephson apparaît lorsqu'une structure de couplage faible établit une cohérence de phase entre deux supraconducteurs. Une théorie unificatrice de cet effet est apparue dans les années 90 dans le cadre de la physique mésoscopique. Basée sur deux concepts fondamentaux, celui de canaux de conduction et celui de réflexion d'Andreev, elle prédit la relation courant-phase pour la structure de couplage de base : un canal unique de transmission arbitraire.<br />Cette thèse illustre ce point de vue mésoscopique par des expériences sur des contacts atomiques supraconducteurs. En particulier, no

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28

Sabater, Carlos. "Theoretical and experimental study of electronic transport and structure in atomic-sized contacts." Doctoral thesis, Universidad de Alicante, 2013. http://hdl.handle.net/10045/31544.

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Thomas-Wilhelm, Dakota J. "It's definitely atomic: the acquisition of atomicity & countability by speakers of Mandarin in an instructed second language acquisition context." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/671666.

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La investigació recent en adquisició de segones llengües des d’una perspectiva generativista (GenSLA) ha intentat donar compte del reacoblament dels trets sintàctics i semàntics dels articles (Cho & Slabakova, 2014) i els noms (Choi, Ionin, & Zhu, 2018) en anglès L2, però no ha convertit aquests resultats en una pedagogia pràctica (Whong, Whong, Marsden, & Gil, 2013). L’objectiu d’aquesta tesi és examinar propostes prèvies (Lopez, 2017; Sabir, 2018) que recomanen materials didàctics (Marsden & Slabakova, 2019) per investigar l’adquisició dels articles i els tipus de noms en anglès L2 per part

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30

Hasler, Paul. "Total IgE and specific IgE against egg albumin in patients with atopic eczema allergic rhinitis before and after treatment with sodium cromoglycate /." Bern, 1988. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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31

Schenkel, Marc. "Intradermal skin testing in cats using fluorescein reveals a high association with abdominal skin lesions as a possible hallmark for atopic cats /." [S.l.] : [s.n.], 2001. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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32

Cagil, Ayse. "Production Of Scalars At Electron Colliders In The Context Of Littlest Higgs Model." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611393/index.pdf.

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The littlest Higgs model is one of the most economical solution to the hierarchy problem of the standard model. It predicts existence of new gauge vectors and also new scalars, neutral and charged. The littlest Higgs model predicts the existence of new scalars beside a scalar that can be assigned as Higgs scalar of the standard model. In this thesis, the production of scalars in $e^+e^-$ colliders is studied. The scalar productions associated with standard model Higgs boson are also analyzed. The effects of the parameters of the littlest Higgs model to these processes are examined in detail.

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33

Sordes, Delphine. "Imagerie, manipulation et contact électronique atome par atome sur la surface Si(100) : H avec le microscope à effet tunnel basse température à 4 pointes." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30048/document.

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La construction de circuits électroniques de section atomique est l'un des grands défis de la nanoélectronique ultime. Pour construire un circuit électronique atomique, il faut d'abord mettre au point l'instrument de construction puis choisir la surface-support stabilisant ce circuit. Sur la surface d'Au(111) préparée en ultra vide, nous avons mis en œuvre et stabilisé le tout premier LT-UHV-4 STM. Ce microscope à 4 pointes STM balayant en même temps et indépendamment une même surface a été construit pour le CEMES par la société ScientaOmicron. Sur l'Au(111), nous avons reproduit tous les résu

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Leyva, Castillo Juan Manuel. "Etude du rôle de la cytokine thymic stromal lymphopoietin (TSLP) produite par les keratinocytes dans la marche atopique." Thesis, Strasbourg, 2012. http://www.theses.fr/2012STRAJ059/document.

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La marche atopique désigne la progression séquentielle des maladies atopiques, en particulier l’apparition d’asthme chez les enfants précédée par celle d’une dermatite atopique (DA) sévère chez les nourrissons. De plus, l’asthme est influencé par le degré de sévérité de la DA, qui pourrait ainsi être considérée comme la porte d’entrée pour le développement ultérieur d’une inflammation allergique des voies aériennes.Mon travail de thèse a consisté à déterminer l’implication de la cytokine TSLP produite par les kératinocytes pendant la marche atopique et implication de la cytokine TSLP pendant l

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Onofri, Andrea. "Concepts in context." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3462.

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My thesis tackles two related problems that have taken center stage in the recent literature on concepts: • What are the individuation conditions of concepts? Under what conditions is a concept C₁ the same concept as a concept C₂? • What are the possession conditions of concepts? What conditions must be satisfied for a thinker to have a concept C? I will develop a pluralist and contextualist theory of concept individuation and possession: different concepts have different individuation and possession conditions, and contextual factors play a crucial role in determining what concepts we attribu

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Seeboth, Nicolas. "Nouveaux ligands donneurs mixtes contenant un atome de phosphore sp2." Phd thesis, Ecole Polytechnique X, 2005. http://pastel.archives-ouvertes.fr/pastel-00002310.

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Le travail présenté ici rassemble les résultats obtenus sur la préparation de phosphamétallocènes essentiellement autour de M=Ru. Une meilleure compréhension des phénomènes gouvernant la coordination de métaux de transition mous sur des anions phospholures et une préparation de phospholures modifiés par un groupement ester nous a permis de favoriser le mode de coordination 5 et de résoudre la chiralité par simple cristallisation. Nous avons pu montrer que cette synthèse et cette méthode de résolution sont assez générales et s'appliquent dans ces cas où M=Fe, Ru et Mn. En tenant compte des enje

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Ketene, Alperen Nurullah. "The AFM Study of Ovarian Cell Structural Mechanics in the Progression of Cancer." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/32968.

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According to the American Cancer Society, Cancer is the second most common cause of death in the United States, only exceeded by heart disease. Over the past decade, deciphering the complex structure of individual cells and understanding the symptoms of cancer disease has been a highly emphasized research area. The exact cause of Cancer and the genetic heterogeneity that determines the severity of the disease and its response to treatment has been a great challenge. Researchers from the engineering discipline have increasingly made use of recent technological innovations, namely the Atomic For

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Mohammadzadeh, Saeideh. "Electronic Transport Properties of Copper and Gold at Atomic Scale." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-63427.

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The factors governing electronic transport properties of copper and gold atomic-size contacts are theoretically examined in the present work. A two-terminal conductor using crystalline electrodes is adopted. The non-equilibrium Green’s function combined with the density functional tight-binding method is employed via gDFTB simulation tool to calculate the transport at both equilibrium and non-equilibrium conditions. The crystalline orientation, length, and arrangement of electrodes have very weak influence on the electronic characteristics of the considered atomic wires. The wire width is foun

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Malinowski, Tuhiti. "Electroluminescence à l'échelle du contact métallique ponctuel." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4030/document.

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Cette thèse expérimentale traite de l'électroluminescence de contacts atomiques en or. Les contacts métalliques ponctuels sont formés et pilotés à l'aide d'un dispositif de jonction brisée contrôlée mécaniquement. Les contacts sont formés à partir d'un fil d'or et sont étudiés à la température ambiante.L'électroluminescence est observée dans le visible au travers d'un microscope optique. Le détecteur est une caméra sensible en silicium. Pour l'analyse du spectre émis, un dispositif dispersif en ligne a été spécifiquement développé. Pour l'infrarouge, le détecteur photovoltaïque monocanal est e

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Abegg, Erik. "Vers une détermination sans contact des propriétés mécaniques de matière condensée molle avec AFM." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALY043.

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La détermination précise de l'élasticité en dessous de l'échelle microscopique par des mesures d'indentation sur des matériaux mous est difficile car elle dépasse les limites des modèles mécaniques de contact conventionnels. Les contributions d'énergie de surface dominent l'interaction et empêchent une détermination précise de l'élasticité en volume du matériau. Pour résoudre ce problème, une méthode de mesure sans contact dans un liquide a été développée sur le Surface Force Apparatus (SFA) permet une détermination absolue de l'élasticité sans contact solide-solide. Bien que réussie, le SFA p

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Dantas, Isabella Lima. "Nanopartículas lipídicas contendo tacrolimo para uso tópico : desenvolvimento e caracterização." Universidade Federal de Sergipe, 2015. https://ri.ufs.br/handle/riufs/3948.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The Atopic Dermatitis (AD) is a chronic inflammatory skin disease that affects patients with disabilities in the skin barrier and low immune response. Tacrolimus ointment for topical use is an immunomodulator that has shown to be a good alternative for the treatment of AD. However, it also has adverse effects such as low and variable bioavailability, burning sensation and itching at the application site. Thus, the development of new dosage forms that overcome these drawbacks is crucial to the success of the therapy. The obj

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Guy, Daniel. "Synthèse de monomères et polymères contenant des atomes de phosphore ou de silicium hypercoordonnés." Montpellier 2, 1997. http://www.theses.fr/1997MON20151.

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Le premier chapitre est consacre a la synthese et a l'etude des proprietes de monomeres et de quelques polymeres contenant des atomes de phosphore. Nous etudions en premier lieu des composes comportant des atomes de phosphore tricoordonnes du type phpr#2 ou nppr#2. Dans une deuxieme partie nous decrivons la synthese de divers phosphanes hypercoordonnes, l'hypercoordination etant induite par l'utilisation du ligand rigide 8-(dimethylamino)-1-naphtyle. Nous avons synthetise des phosphanes acetyleniques vrais ainsi qu'un compose disubstitue dont la structure a ete determinee aux rayons x et montr

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Huez, Philippe. "Synthèses et analyses conformationnelles de macrocycles aza-β³-peptidiques contenant des atomes d'azote chirogéniques". Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S072/document.

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Le travail présenté dans ce mémoire est consacré à la synthèse de cycles pseudopeptidiques construits à partir d'aza-β³-aminoacides, et à la détermination des conformations adoptées par ces cycles. Le travail réalisé a permis de montrer que les cycles obtenus à 8, 16 et 24 liaisons adoptent des conformations privilégiées dans lesquelles la configuration relative des atomes d'azote chiraux est fixée en dépit du phénomène d'inversion pyramidale associé à la structure électronique de cet élément chimique, en réponse à des contraintes structurelles qui varient selon la taille du macrocycle. Ces cy

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Mege, Fabrice. "AFM à contact résonant : développement et modélisation." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00618676.

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Avec l'intégration de circuits intégrés de plus en plus denses, le besoin d'outils de caractérisation adaptés à ces échelles se fait ressentir. Identifier et analyser les problèmes de fiabilité survenant dans ces structures à des dimensions inférieures à 100 nm demande la mise au point d'instruments innovants. Ce travail de thèse a consisté dans un premier temps à développer un appareil à champs proches sensible aux propriétés mécaniques de surface, et dans un second temps à analyser les résultats expérimentaux en s'appuyant sur des approches analytiques et/ou numériques. Désigné sous le nom d

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Meneghetti, Mario Roberto. "Synthese, structure et reactivite de nouveaux composes organometalliques chiraux contenant un atome de cobalt." Université Louis Pasteur (Strasbourg) (1971-2008), 1999. http://www.theses.fr/1999STR13098.

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Nous avons synthetise une serie de composes organometalliques du cobalt par une reaction de transmetallation en utilisant des ligands azotes lithies et le compose dimere ( 5-c 5h 5)coi 2 2, qui conduit a une serie de composes cobaltocycliques ou la liaison co-c obtenue est stabilisee par la coordination intramoleculaire d'un atome d'azote au metal et ou le cobalt se trouve dans un environnement asymetrique pseudotetraedrique. Ces composes presentent une grande stabilite configurationnelle. Lorsque nous etudions le comportement des composes formes avec un ligand optiquement actif, nous obtenons

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Skopin, Evgenii. "Etude des premiers instants du dépôt chimique par flux alternés (ALD) de films ZnO ultra minces sur In0,53Ga0,47As, dans le but d'optimiser la résistance de contact d'une structure MIS." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY016/document.

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Ce travail porte sur l'étude des étapes initiales du dépôt de couches atomiques de ZnO (ALD) sur une surface (100) de In0,57Ga0,43As, par l'utilisation de techniques de caractérisation in situ (rayonnement synchrotron). En raison de la grande mobilité des électrons, le semi-conducteur III-V InGaAs est un matériau potentiel pour remplacer le canal de Silicium dans les transistors à effet de champ (MOSFET). Afin de diminuer la hauteur de la barrière Schottky et la résistance de contact, une couche ultra-mince (tunnel) de ZnO peut être insérée entre le métal et le semiconducteur InGaAs. Au cours

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Brunson, Kennard Marcellus. "Synthesis and Characterization of methylene bis (p-cyclohexyl isocyanate)-poly (tetramethyl oxide) based Polyurethane Elastomers." VCU Scholars Compass, 2005. http://scholarscompass.vcu.edu/etd/1211.

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This research concerns the development and characterization of methylene bis (p-cyclohexyl isocyanate/butanediol) (HMDI/BD) based polyurethanes used in connection with surface-active anti-microbial polyurethanes. Previously studied polyurethanes having an isophorone diisocyanate/butanediol (IPDI/BD) hard block contaminated water during dynamic contact angle (DCA) analyses. This contamination by unknown species confounds results from biocidal studies and jeopardizes the use of the polyurethane as a matrix polyurethane. By contrast, polyurethanes with methylene bis (p-cyclohexyl isocyanate)/buta

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Dinh, Phuong Mai. "Time-dependent density functional theory applied to clusters and molecules in contact with an environment." Habilitation à diriger des recherches, Université Paul Sabatier - Toulouse III, 2009. http://tel.archives-ouvertes.fr/tel-00981941.

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We present recent theoretical and methodological explorations on the dynamics of sodium clusters in the framework of Time-Dependent Density Functional Theory (TDDFT), coupled non-adiabatically to Molecular-Dynamics (MD). In particular, a hierarchical approach, in the spirit of Quantum-Mechanical/Molecular-Mechanical methods, has been developed for the description of metal clusters in interaction with a dynamically polarizable substrate, as rare gases or MgO. Numerous examples of application of this approach (Na clusters in or on Ar substrate, Na clusters deposited on MgO; optical response, dyn

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Vallet, Valérie. "Traitement électronique des molécules contenant des atomes lourds : couplage entre interaction spin-orbit et corrélation : étude des complexes d'actinides." Toulouse 3, 2001. http://www.theses.fr/2001TOU30059.

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Smaira, André de Freitas. "Dinâmica de um condensado de Bose-Eintein contendo sólitons." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-02042015-170017/.

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Condensados de Bose-Einstein (BEC) são sistemas macroscópicos excelentes para a observação do comportamento quântico da matéria. Desde sua obtenção experimental em gases atômicos alcalinos diluídos aprisionados por campos magnéticos, há importantes aspectos relacionados a esse sistema que foram intensamente explorados, como os modos coletivos do BEC harmonicamente aprisionado, seu tunelamento através de barreiras de potencial e os estados excitados desse sistema, incluindo vórtice e sóliton. O último consiste de pacote de onda localizado, que propaga sem mudança de forma. Nesse trabalho, inves

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