Дисертації з теми "Assemblie"
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Bagheri, Mehran. "Intrinsically Disordered Proteins: Mechanics, Assemblies, and Structural Transitions." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36576.
Повний текст джерелаPurdy, John Gerard Craven Rebecca C. "To assemble, or not to assemble the initiation of retroviral capsid assembly /." [University Park, Pa.] : Pennsylvania State University, 2009. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-4649/index.html.
Повний текст джерелаJamot, Didier. "Le Parlement et les relations internationales." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM1005.
Повний текст джерелаParliament is generally thought to be an institution which is incapable of influencing international relations. The Executive Power alone is said to be capable of acting in this sphere.In reality, while this was true at the dawn of the Fifth Republic, it is no longer the case. The way the world changed after World War II – decolonization, the end of the Cold War, globalization, but also the rapid European integration – was the fundamental appeal of foreign policy for members of Parliament. The constitutional changes which then occurred, changes to Rules of Procedure of the assemblies and the adoption of several laws, afforded them the ability to act. Ever since, deputies and senators have influenced French foreign affairs. They have access to tools which assure them information and a certain control of the Government's international activities. They have likewise succeeded in establishing a parliamentary diplomacy equally bilateral – like Friendship groups – as multilateral, as is found in international parliaments
Wagh, Vaishali D. "Assembling form and space : ceramics as an assemblage." Virtual Press, 2006. http://liblink.bsu.edu/uhtbin/catkey/1355258.
Повний текст джерелаDepartment of Art
Shin, Du Hyun. "Host-Guest Assemblies for Functional Interfaces via Langmuir-Blodgett and Self-Assembly Technique." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/54573.
Повний текст джерелаPh. D.
Beckerich-Davilma, Stéphanie. "Constitution et assemblée régionales : Étude comparée des expériences française, italienne et espagnole." Thesis, Toulon, 2014. http://www.theses.fr/2014TOUL0098.
Повний текст джерелаWithin the French, Italian and Spanish Constitutions, the direct references to laws regulating regional assemblies are rare, yet determining. Regional autonomy in any of the three countries entails the existence of an assembly, having a representative nature and a deliberative character, regardless of whether the national state of the given country exists in a decentralized or regional form. The nature and internal rules of the regional assemblies are conditioned by the extent to which they are recognized in the constitutions of their respective countries. This comparative study examines the laws governing the regional assemblies, through the prism of constitutional law, and shows that their normative sources are structured by the Constitutions. Different principles of parliamentary law protect the assemblies' structural and functional autonomy, and serve as guarantees for the constitutional exigencies they are submitted to, no matter the value of the normative sources. The constitutions prescribe the minimum threshold for the level of harmonization between parliamentary and regional assembly laws. Yet, a regional assembly cannot be equated with the parliament of a unitary state, and as a consequence, the transposition of laws does not target the inherent principles of each assembly’s particular nature. Hence, there is also a maximum threshold of harmonization that cannot be exceeded. Further, regional assembly law may deviate from parliamentary law and take an innovative form in order to secure the assemblies' functions through the accommodation of their specificities.To give regional assemblies the means to exercise their functions, either through the application of rules governed by parliamentary law or by the creation of particular rules at the regional level, is to guarantee the regions' autonomy as defined by the Constitutions
Stevens, Marryat. "Exploiting the assembly of designed self-assembling protein structures." Thesis, University of Sussex, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426313.
Повний текст джерелаKaroui, Badreddine. "Active force-controlled part assembling for a robotic assembly cell." Thesis, University of Ottawa (Canada), 1988. http://hdl.handle.net/10393/5462.
Повний текст джерелаSahin, Erinc. "Coiled-coils as assembly-directing domains in self-assembling structures." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 199 p, 2008. http://proquest.umi.com/pqdweb?did=1654492231&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Повний текст джерелаMorris, Kyle. "The assembly and structure of self-assembling peptides : molecular to supramolecular." Thesis, University of Sussex, 2012. http://sro.sussex.ac.uk/id/eprint/39707/.
Повний текст джерелаStockton, William B. (William Blake). "Structure and electrical properties of assemblies of polyaniline : from blends to self-assembled multilayers." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/32660.
Повний текст джерелаAlgaba, Hugo. "Étude de la formation de structures complexes auto-organisées par séchage confiné de solutions dans des milieux poreux microtexturés en 2D." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S102/document.
Повний текст джерелаSelf-assembly is a structuration technique which allows to control the shape and to build organized systems at different length scales. In this Thesis, we have studied the self-assembly of soap films formed in confined and structured media. Surfaces are composed of a grid of cylindrical pillars in PDMS which positions can vary allowing to control the final structure. We have expanded a previous study performed with square grids, using rectangular grids to create an anisotropy in order to guide the orientation of films. We showed that films always aligned in the shortest direction, even with only 5 to 10% difference between axes. Furthermore, the increase of pillar thickness allows to sharpen this transition (2%) between disorder and films alignment. These results have been completed by numerical simulations allowing to model all the grids. Finally, we made additional drying experiments in diamond and quasicrystalline grids. The shape of the pillars has also been changed in order to create a visual contrast of the drying deposit
Rhee, Stephen J. (Stephen Jisoo). "Sub-assembly partitioning choice for complex assemblies based on an action-count-closure criterion." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/39770.
Повний текст джерелаBarrière, Maxime. "Assemblages de puissance innovants haute température - haute tension pour composants Si dédiés aux applications embarquées aéronautiques, automobiles et ferroviaires." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0748/document.
Повний текст джерелаPower electronics is a changing field. The environments and operating conditions of power modules are more severe: higher temperature, higher voltage and higher current. In addition, silver sintering was introduced in power modules to replace solders composed by lead. The combinations of these developments have motivated our work. In order to improve the design of the power modules our researches purpose to increase the dissipation of power modules with a3D-vertical structure. A three-phase inverter with3D-vertical structure has been designed with a Si dice sintered. Thermal and electrical characterizations were performed and allowed to show the contribution of this technology. This study is coupled to thermal and electrostatic Finite Element Method simulations to highlight and improve the possible issues of this assembly
Costa, Eduardo Mariz Corrêa da. "Foto-assemblage." Universidade do Estado do Rio de Janeiro, 2013. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=4924.
Повний текст джерелаFOTO-ASSEMBLAGE consiste em nomenclatura sugestionada para definir os trabalhos que tenho produzido a partir da junção de fotografias digitais. As elaborações e fundamentações desses trabalhos representam também o cerne das pesquisas que resultaram na presente dissertação. Em princípio, o termo foto-assemblage haveria de referir-se a questões técnicas ou formais dessa prática. Contudo, ao desenvolver as pesquisas alguns procedimentos acabaram por determinar certas nuances que revelaram aspectos comuns também em seus e conteúdos. Como resultado de construções artísticas juntando fotografias desde 2009, cheguei às composições sintéticas aqui apresentadas, construídas a partir de duas fotografias. Aventei o nome foto-assemblage por observar nas imagens resultantes ressalvas que as distinguiriam de certas convenções atribuídas à ideia de fotografia. Ao mesmo tempo, as referidas imagens proporiam um possível desdobramento ao entendimento de assemblage enquanto técnica artística. Ainda que não seja uma regra, fotografias revelam imagens de momentos. Em sua relação com a compreensão humana de tempo ou espaço, fotografias quase sempre contêm instâncias mínimas. Fotografias, contudo, podem ser também compreendidas como uma contração de um percurso de tempo. Toda imagem fotográfica pode ser assimilada como resultante de determinados acontecimentos anteriores e mesmo tida como elemento gerador de conseqüências futuras. Seguindo esse entendimento, o que proponho com a foto-assemblage é que essa lide com segmentos de tempo ou de espaço contidos numa mesma imagem. Essas fotografias originárias ganhariam uma nova atribuição, sendo retiradas de seu contexto original, serviriam de balizas do percurso de tempo ou espaço suprimido e subjetivado entre elas. Poeticamente, eventos ocorridos entre as fotografias originárias estariam contidos nas imagens produzidas. O termo assemblage foi incorporado às artes a partir de 1953, por Jean Dubuffet, para descrever trabalhos que seriam algo mais do que simples colagem. A ideia de assemblage se baseia no princípio de que todo e qualquer material ou objeto colhido de nosso mundo cotidiano pode ser incorporado a uma obra de arte, criando um novo conjunto, sem que perca seu sentido original. Esse objeto é arrancado de seu uso habitual e inserido num novo contexto, tecendo laços de relação com os demais elementos, construindo narrativas num novo ambiente, o da obra. Na ideia da foto-assemblage, entretanto, é sugerido uso das imagens fotográficas originárias não como objetos que estariam em um mundo cotidiano, mas sim como imagem na concepção do que seria uma entidade mental. Adoto como que uma visão mágica onde as imagens originárias e básicas estariam numa outra dimensão, num plano bidimensional, não manipulável por nós habitantes da tridimensionalidade. Nesse ambiente imaginário ou não, as fotografias são assentadas consolidando a foto-assemblage. Quando a foto-assemblage se concretiza, se corporifica numa mídia, sendo impressa para uma contemplação, ai então, passaria a integrar nosso mundo tridimensional. O resultado poderia ser admitido como um híbrido, uma terceira coisa, a partir de duas que já não se dissociam mais no ensejo de uma compreensão estética. Ao final da dissertação, apresento experiências práticas que resultaram em quatro séries de imagens em foto-assemblage. Cada série enfatiza aspectos peculiares do que denomino paisagem expandida, representando percursos de tempo, espaço ou trajetos entre o mundo concreto e mundos do inconsciente.
PHOTO-ASSEMBLAGE consists on nomenclature to define the work that I have produced from the junction of digital photographs. The elaboration and justification of these works also represent the core of the research that resulted in this dissertation. In principle, the term photo-assemblage would refer to formal or technical issues this practice. However, research to develop some procedures ultimately determine certain nuances that reveal common aspects and also in their content. As a result of joining constructions artistic photographs since 2009, I came to the synthetic compositions presented here, constructed from two photographs. I suggested name photo-assemblage by observing the resulting images caveats that distinguish certain conventions attributed to the idea of photography. At the same time, these images would propose a possible unfolding to the understanding of assemblage as artistic technique. Although it is not a rule, photographs show images of times. In its relation to the human understanding of time and space, photographs almost always contain instances minimal. Photographs, however, can also be understood as a contraction of a course of time. Every photographic image can be assimilated as a result of certain events before and even seen as an element that generates future consequences. Following this understanding, what I propose with the photo-assemblage is that it deals with segments of time or space contained in the same picture. These photographs originating win a new award, being removed from their original context, serve as beacons of travel time or space and deleted subjectivizing between them. Poetically, events originating from the photographs would be contained in the images produced. The term assemblage to the arts was built as from 1953 by Jean Dubuffet to describe works that would be something more than simple collage. The idea of assemblage is based on the principle that any material or object drawn from our everyday world can be incorporated into a work of art, creating a new set without losing its original meaning. This object is torn from its habitual use and placed in a new context, weaving bonds of relationship with the other elements, constructing narratives in a new environment, the work. In view of photo-assemblage, however, is suggested use of photographic images as objects originating not they would be in an everyday world, but as the design image of what a mental entity. I adopt it as a magical sight where the images originate, basic, would be in another dimension, a two-dimensional plane, we can not be manipulated by the inhabitants of three-dimensionality. In this "environment" imaginary or not, pictures are settled consolidating photo-assemblage. When the photo-assemblage materializes, is embodied in media, being printed for contemplation there would then integrate our three-dimensional world. The result could be admitted as a hybrid, a third thing from two no longer dissociate more opportunity in an aesthetic understanding. In the concluding stages of dissertation, practical experiences that resulted in four sets of images in photo-assemblage. Each one emphasizing peculiar aspects of what I title "expanded landscape", reproducing images that contain paths of time, space or paths between the concrete world and unconscious worlds
Zhang, Yuan. "MST Based Ab Initio Assembler of Expressed Sequence Tags." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1273245641.
Повний текст джерелаBerre, Stefano. "Characterization of the late phase of the HIV-1 life cycle in primary macrophages." Thesis, Paris 5, 2013. http://www.theses.fr/2013PA05T002.
Повний текст джерелаMacrophages and T cells are the two cellular targets of HIV-1 in vivo. Macrophages are long-lived cells resistant to the cytopathic effect of HIV-1, and are present in many tissues where they appear to be relatively resistant to antiviral drugs. This is in sharp contrast to HIV-1-infected T cells that rapidly produce new virions before dying. Infection of macrophages is considered an important feature for the development of HIV-1-associated pathogenesis and for the establishment of a viral reservoir. In macrophages, the virus is assembled and accumulated into poorly characterized intracellular compartments called Virus-Containing Compartments (VCCs). During my PhD, I characterized the late phase of the HIV-1 life cycle in infected macrophages. I describe the Scavenger Receptor CD36 as a new component of the VCC required for HIV-1 replication in macrophages. VCC-like CD36+ compartments were observed in both HIV-1-infected and uninfected macrophages. Furthermore, I show that, in some cases, HIV-1 could directly bud into pre-existing CD36+ compartments. Exposure of HIV-1-infected macrophages to CD36-specific antibodies caused the intracellular retention of viral particles within VCCs. The effect of the anti-CD36 antibody was highly specific, potent, rapid and long lasting and, caused a striking reduction both of viral release and of HIV-transmission from macrophages to T cells. In addition, since the incorporation of the Envelope protein (Env) into viral particles is crucial for virus infectivity, I investigated the Env trafficking in primary macrophages. My results suggest that the interaction between Gag and the Gp41 cytoplasmic tail is critical for Env localization to the VCC and for the formation of infectious virions. This work introduces new concepts in the field of HIV-1 assembly in macrophages and suggests an important role for VCC in the HIV life cycle. Our results also unravel novel targets for the development of new antiviral strategies
Smith, Timothy J. "Synthesis and Photophysical Characterization of Covalent and Self-Assembled Oligo (Phenylenevinylenes) and Related Multichromophore-Containing Assemblies." Akron, OH : University of Akron, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1249143659.
Повний текст джерела"August, 2009." Title from electronic dissertation title page (viewed 9/16/2009). Advisor, David A. Modarelli; Committee members, Matthew Espe, Michael Taschner, Yi Pang, Mukerrem Cakmak; Department Chair, Kim Calvo; Dean of the College, Chand Midha; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.
McKinlay, Robert M. "Design and construction of multicomponent spheroidal assemblies on the nano-scale via the self-assembly approach." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/5881.
Повний текст джерелаThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed Aug. 13, 2007). Vita. Includes bibliographical references.
Esteve, Alexandre. "Le député français." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0026/document.
Повний текст джерелаIn the space of sixty years, the Constitution of 4th October 1958 has undergone many legal and political changes. However, one thing has remained: streamlined parliamentarianism. Considering the changes since 1958 and the aspirations of the French people for the modernisation and the rebalancing of the institutions of the Fifth Republic, in 2008 the constituent power worked on upgrading the role of the Parliament and proposed to improve the attractiveness of the parliamentarian function. After ten years of experience, it is clear that the potential improvements have not taken place. At the same time, the democratic requirements of the French have evolved. Hence, what was acceptable yesterday may not be today. This is true for the advantages, traditional practices, individual or collective behaviours of policy makers. Consequently, it may be asked what an MP of the Fifth Republic should be, in both status and function.This study shows that the status of the MP should be strengthened, notably with regard to the resources allocated to the MP, as well as rights and guarantees to allow greater mobility between the mandate and the professional activity of the elected representative, and to improve the representativeness of the MP through the opening up of the Assembly to a new audience. Also, the institutional system within which parliamentary work is performed must be more flexible to return the MP to his/her role as a legislator and overseer of government action. Finally, constituency work must not be neglected because it allows the MP to better carry out his/her legislative and overseeing missions
Pohlhammer, Christopher M. "Sensing for automated assembly : direct calibration techniques for determining part-in-hand location /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/7118.
Повний текст джерелаMarchioni, Marianne. "Ecoconception de nouveaux agents biocides à base de nanoparticules d'argent à enrobage bio-inspiré." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAV046/document.
Повний текст джерелаSilver nanoparticles are increasingly used in everyday consumer goods as well as in medical devices for their biocidal activity, which is due to the release of Ag(I) ions over time. The hindsight on these nano-objects and, in particular, on their safety is still not sufficient and studies on their transformation and their impact in vivo is currently an intense research field. Indeed, the fate in the body of macro- and micro-materials studied classically is not the same as for nanomaterials. The case of the silver nanoparticles illustrates this problem: the soluble silver injected intravenously is eliminated faster than the same amount of silver injected in nanoparticular form. Moreover, the concentration of silver found in the bloodstream and organs is ten times higher when silver nanoparticles are injected rather than ingested. The development of silver nanoparticle-containing implanted devices, that get in direct contact with the body, must thus take into account the related risks. A Safer-by-design approach could be a way to solve this issue.One of the main components of Safer-by-design development is the functionalization of nano-objects. The affinity of the thiolates for Ag(I) ions is very high, which would make thiolated ligands a good tool for silver nanoparticle functionalization. However, it is known that the thiolated molecules lead to different behaviors, ranging from the dissolution of silver nanoparticles into Ag(I) ions to the simple passivation of the surface of the nanoparticles, which leads to the loss of their biocidal activity.The Ecodesign of New Biocidal Agents based on Silver Nanoparticles and Bio-inspired Coating is therefore at the interface of several research areas and its main objective was to lay the conceptual foundations for the development of a Safer-by-design biocidal agent based on the interaction between silver nanoparticles and thiolated molecules.The development of this project required to study the reactivity of various biological or bio-inspired thiolated molecules with silver nanoparticles. First of all, we have highlighted the importance of the architectural pre-organization of biomolecules in the dissolution kinetics, as well as the role of the number of free thiols in the molecule. In the case of molecules inducing the dissolution of the nanoparticles, its kinetics increases with the number of free thiols present on the molecule and with the pre-organization of the metal binding site. In a second time, the main project of this thesis was the development of a proof of concept of a new biocidal agent composed of silver nanoparticles bridged together via a thiolated ligand, which is the chemical mimic of one binding site of a metallothionein. These nanoparticle assemblies were active against bacteria (E. coli) and less toxic than silver nanoparticles on eukaryote cells (HepG2), despite a similar cellular entry. Finally, a screening was performed with polyethylene glycols having two to eight thiols and varying polymer lengths in an attempt to rationalize the differences in the behavior of silver nanoparticles in the presence of the thiolated molecules. This ongoing work leads to various behaviors that will enable to explore novel ways for the development of biocidal based on nanoparticles assemblies mediated by thiol – Ag(I) bonds.Therefore, this overall PhD work allows performing both very fundamental researches concerning the reactivity of thiols with surface silver atoms of the nanoparticles and the development of products with application potential, silver nanoparticle assemblies that are Safer-by-design biocide
Cazaux, Bastien. "Approximation de superchaîne, indexation et assemblage de génome." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT307/document.
Повний текст джерелаWhole genome can not be read by the current sequencing technologies. Instead, the output is short sequences which are portions with errors of the whole genome. One must then proceed to an assembly of these sequences (called read) to find the sequence of the complete genome. A theoretical version of this problem is the problem of the shortest superstring: given a set of words (own set of reads), we try to find the shortest string that contains all others as substring (the genome of origin). Studied since the 60s, this problem is notoriously difficult to solve by both exactly and approximate methods.Genome assembly requires some reads preprocessing, such as the correction of errors introduced by the sequencing. Some correction softwares (or other pre-treatments) use an indexing data structure of the sequences to localize errors. However, after the correction, this data structure is lost and the assembly uses only the corrected reads. In this thesis, we wonder how to use indexing structures to facilitate or to improve the quality of the genome assembly.First, we show that the graphs used in assembly algorithms could quickly rebuild from an indexing structure (de Bruijn graph, contracted de Bruijn graph and overlap graph). In addition, we present a new graph which summarizes the information of conventional assembly graphs and that we call the hierarchical overlap graph.Secondly, we wondered how an indexing data structure could directly help to solve the theoretical problem of the shortest superstring. For this purpose, we study the solutions that the greedy algorithm gives to this problem (their approximation, their combinatorics, ...) and many of these variants (reverse complement case, cyclic superstring case, case cover by a set of superstrings). This has solved several questions about the complexity and the approximation of these problems. In particular, the greedy algorithm solves in linear time the question of the shortest cyclic cover of strings. Although the greedy algorithm is the simplest and one of the most studied of these problems, it remains a mystery. Our study has highlighted a new graph, the superstring graph, which corresponds to a dip from solutions of the greedy algorithm in the index structure that is the suffix tree. In other words, the superstring graph summarizes all the greedy solutions in a linear space.Finally, attention has turned to the algorithms of the best assemblers used in practice (IDBA, Spades), which have improved the assembly of short reads using several assembly graphs. We show firstly that the superstring graph can store more information than these assemblers and with a complexity in much smaller space. Then, it is apparent that the greedy algorithm for a variant of the shorter superstring problem provides sequences which include the contigs found for these algorithms. These results link the assembly in practice and the superstring problems, and give a strong theoretical framework for studying these heuristic algorithms
Dirany, Nadine. "Elaboration de matériaux micro-nanostructurés à morphologies contrôlées, à base de tungstates, pour la photo-dégradation." Thesis, Toulon, 2017. http://www.theses.fr/2017TOUL0001/document.
Повний текст джерелаIn the framework of the development of new technologies for environmental protection, andmore specially for the depollution of water or air, this work deals with the implementation ofsemiconductor materials with controlled morphologies, likely photocatalytic activities andtheir enabling the degradation or transformation of organic molecules in aqueous media.Several types of syntheses leading to diversified morphologies have been implemented. Eachmaterial was characterized by X-ray diffraction, scanning and transmission electronmicroscopies, and Raman spectroscopy. Diffuse reflectance was used to determine the bandgap of the materials. Given the properties already known for MWO4 tungstates, we chosethree materials: WO3 trioxide, SrWO4 tungstate and a new tungstate NaCe(WO4)2 orNa0.5Ce0.5WO4. The oxide WO3 was chosen as the reference material. For this material, twotypes of morphologies were obtained: nanoplates and nanospheres. The tungstate SrWO4 withscheelite structure was synthesized in two microstructural forms: spindles and spheres. A newmaterial was synthesized and characterized: double tungstate of Na0.5Ce0.5WO4 with scheelitestructure. For this new phase, three hierarchical 3D morphologies were developed using thehydrothermal method in the presence of EDTA. For each observed morphology, agermination-growth mechanism is proposed. The photocatalytic performances of the differentmorphological forms were evaluated during the degradation of rhodamine B (RhB) andmethylene blue (MB), under UV and visible radiation. The photocatalytic efficiency of thedifferent microstructures was studied as a function of the pH of the reaction medium. Fromthe results obtained, we have been able to show the strong correlation between band gap andphotocatalytic reactivity, but also between morphologies, sizes and photocatalytic properties.It has been shown that the degradation is based on two complementary mechanisms: theadsorption of molecules due to the porosity of the microstructures and their morphology, andthe photocatalytic reaction due to the active radicals generated by the photogenerated e-/ h+pairs. Thus, RhB decomposes in the presence of SrWO4 and WO3 under UV-C (254 nm) andUV-Vis (365 nm) respectively. Methylene blue degrades in the presence of NaCe(WO4)2under UV-Vis solar radiation
Zanini, Maria Estela Benedetti. "Convivência democrática na escola: em foco, as rodas de diálogo de professores." Pontifícia Universidade Católica de São Paulo, 2018. https://tede2.pucsp.br/handle/handle/21746.
Повний текст джерелаMade available in DSpace on 2018-12-13T11:44:13Z (GMT). No. of bitstreams: 1 Maria Estela Benedetti Zanini.pdf: 1470167 bytes, checksum: 4b86bf006aa46f4bc94b5c7d278bf121 (MD5) Previous issue date: 2018-10-22
This work is an engaged qualitative research whose objective was to describe and analyze the process of implementation and development of the teachers’ and managers’ assemblies in Colégio Bandeirantes. In this study, teachers' assemblies were analysed from their inception, in May 2017, until June 2018, in a total of ten meetings. Data analysis was carried out based on the collection, study and interpretation of the documents related to this process, the agenda/themes proposed for discussion in the teachers’ assemblies and the minutes of each assembly. The twenty-five themes that were proposed were organized in categories, a posteriori, using objective criteria, at the discretion of the researcher. In order to obtain the participation of a greater number of teachers, an open online platform (DemocracyOS) was used in the preparation of the agendas, which enabled the posting and voting of the themes to be discussed in each assembly. The teachers’ assemblies at Colégio Bandeirantes are part of a Positive Coexistence Plan that is being developed in the school and is organized in several interconnected and complementary actions involving teachers, managers, students and employees. The theorical references for this work were L. R. Almeida, U. F. Araújo, J. M. Puig, T. P. Vinha e L. R. P. Tognetta. It is believed that the assemblies are spaces for the resolution of conflicts that take place in the school environment, once teachers have the opportunity to express themselves in relation to the issues on the agenda, to express their opinions about them and to suggest solutions, thus, being implicated in solving the problems. The implementation of the assemblies also enables the exercise of otherness and cooperation, as well as providing an environment in which the educator feels he is being heard and valued in his concerns and anguishes, which contribute to interpersonal relationships being more respectful and to school environment being of better quality
Este trabalho é uma pesquisa qualitativa engajada que teve como objetivo descrever e analisar o processo de implantação e desenvolvimento das rodas de diálogo de professores e gestores do Colégio Bandeirantes. Nesse estudo, foram analisadas as rodas de diálogo de professores desde sua implantação, em maio de 2017, até junho de 2018, totalizando 10 encontros. A análise de dados foi realizada a partir de levantamento, estudo e interpretação de documentos referentes a esse processo – as pautas/temas propostos para discussão nas rodas de professores e as atas de registro de cada um desses encontros. Os 25 temas apresentados na análise foram organizados em categorias, à posteriori, utilizando critérios objetivos, de autoria da pesquisadora. A fim de conseguir a participação de um maior número de professores utilizou-se, na elaboração das pautas dos encontros, uma plataforma online e aberta – DemocracyOS – que possibilitou a publicação e a votação dos temas discutidos nas rodas de diálogo. As assembleias docentes no Colégio Bandeirantes constituem parte de um Plano de Convivência Positiva que vem sendo desenvolvido na escola e é organizado em diversas ações, interligadas e complementares, que envolvem professores, gestão, alunos e funcionários. Os referenciais teóricos para este trabalho foram L. R. de Almeida, U. F. Araújo, J. M. Puig, T. P. Vinha e L. R. P. Tognetta. Acredita-se que as rodas de diálogo são espaços para a resolução de conflitos que acontecem no ambiente escolar, pois os professores têm a oportunidade de se manifestar em relação aos assuntos pautados, colocar suas opiniões a respeito e sugerir encaminhamentos e, dessa maneira, implicam-se na solução dos problemas. A implantação das rodas de diálogo de professores também possibilita o exercício de alteridade e cooperação, além de propiciar um ambiente no qual o educador sente-se ouvido e acolhido em suas dúvidas e angústias, o que contribui para que as relações interpessoais sejam mais respeitosas e para que o clima escolar seja de melhor qualidade
Lu, Chenze. "Nano-assemblages d'ADN induites par des cibles - Détection de petites cibles par formation de réseaux d'ADN." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAV066/document.
Повний текст джерелаThe detection of small molecules contributes to the development of many fields such as food safety, homeland security, diagnose, environment control, etc. However, their small size and low concentration are the usual cause of limitations in their detection. In order to improve the detection, biosensors with appropriate probes and signal amplification strategies are required. Amongst the commonly used recognition elements, aptamer has the advantage of easier mass production and modification, reversible denaturation at high temperature and high tolerance of salt concentration and pH in the working environment. More importantly its small size made it an ideal choice for creating delicate structures for the detection of small targets. The possibility of splitting the aptamer sequence has provided more approaches for amplification purpose. There are two categories of detecting methods based on aptamers: heterogeneous analyzation where the aptamer is immobilized on a surface or homogeneous analyzation where the assay is performed in solution. In this thesis, we proposed an amplification method useful for both heterogeneous and homogeneous assays. Adenosine was used as a proof of concept target. The detection of Adenosine was achieved by combining the self-assembly of oligonucleotide dimers with split-aptamer dangling ends. We constructed self-assembled DNA structures (from 1D to 3D) with Adenosine as the trigger for a structural change. The heterogeneous assay is based on in Surface Plasmon Resonance imaging (SPRi). SPRi is a method sensitive to the change of refraction index created by the interaction between the probes immobilized on the gold surface and the targets in the flowing solution. With the presence of Adenosine in the solution, the DNA structure is self-assembled on the gold surface and the signal was created. The detection limit achieved by this method was 10 µM. The second homogeneous assay is based on the melting profile of the solution determined from the absorbance of UV light (260 nm wavelength). The UV absorbance of single strand DNA and hybridized DNA duplex is different. Due to this effect, the melting temperature could be obtained from the UV absorbance measured. The DNA structures combining self-complementary oligonucleotides and split-aptamer dangling ends have two melting temperatures, one correspond to the oligonucleotides and the other to the split-aptamer. In presence of Adenosine in the solution the strength in the binding is increased. As a result, the melting peak of the split-aptamer shifted to higher temperature while the second melting peak correspond the oligonucleotide remains the same as an internal reference. The detection limit achieved for this method was 1 µM. The DNA structures we proposed varied from 1D to 3D: the 1D structure was a DNA chain formed by a series of dimers connected through split-aptamer dangling ends; the 2D structure was a Y shape structure formed by three single-strand DNA with a split-aptamer dangling end on each branch of the “Y”; the 3D structure was a tetrahedron formed by four single-strand DNA with split-aptamer dangling ends on the four vertexes. With presence of Adenosine, 2D and 3D structures can further form a network with the dangling ends. The 1D structure has been maturely developed for the two detection methods, the 2D and 3D structures have been proven effective for detection but still require more efforts to reach perfection
Růžička, Lukáš. "Návrh racionalizace montážní linky sestav pro tepelné výměníky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232020.
Повний текст джерелаFeno, Remiel. "Analyse et évaluation de la reconfiguration d'une ligne de production : application à l'assemblage en tôlerie automobile." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0057/document.
Повний текст джерелаIn order to introduce a new product in an existing plant, several decisions concerning possible changes in the production system have to be made. These changes are more frequent and require to reconfigure the system as often as needed. It represents a disruption during the system life cycle. Several solutions are assessed in terms of investment cost, reconfiguration time, quality and flexibility of the production system at the preliminary phases of the project. The objectives are multiple and sometimes conflicting. That makes difficult to reach a consensus in the assessment of solutions. Moreover, it is difficult to have a shared vision of the impact of changes on the initial configuration of a production line. The decisions made during this phase have a significant impact on the other project phases (development, integration, start of production). In order to improve these decisions, this thesis proposes first, to study the reconfiguration process of a production line in order to identify solutions and their impacts on the initial system configuration, then after, we identify and organize the relevant performance criteria to assess solutions with a multi-criteria based approach in the early phases of the project. Finally, we develop a factory digital review process to detect problems earlier and validate the solutions adopted at several project milestones
Calupitan, Jan Patrick Dela Cruz. "Térarylènes photo réactifs : synthèse et études par microscopie à effet tunnel." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30016/document.
Повний текст джерелаPhotoswitching diarylethenes, and their terarylene derivatives, are promising for the next generation optoelectronic devices because of their excellent photochemical properties. To make them viable for miniaturized electronic devices, it is necessary to study this class of molecules at the single molecular level by scanning tunneling microscopy under ultra-high vacuum (UHV STM). This thesis has three parts: 1) development of terarylenes highly sensitive to switching; (2) their modification for STM studies; and 3) results of STM investigations. To be studied at the single molecular level by STM, terarylenes with high switching sensitivity have been selected. These compounds display high quantum yields of up to 100 %. However, the cycloreversion reaction remains low so an alternative route, through a chain-reaction oxidative mechanism, has been sought. In the first part, we show that the efficiency and speed of this reaction may be controlled by attachment of aromatic groups on the reactive carbons. In the second part, we functionalized these molecules for STM studies by attaching tert-butyl and chloride groups. These substituents preserve their excellent photochemical and switching properties while tert-butyl groups show bright contrast in STM images, minimize aggregation of these molecules on the surface, and slightly decouple the molecule from the surface. The chlorine group has been introduced to direct their surface assembly on insulating substrates composed of crystalline NaCl bilayer previously grown over a metallic substrate. In the third part, results of STM are presented. We developed a new bottom-up approach for forming reproducible nanoassemblies of the unmodified terarylene at 77 K. Meanwhile, at 5 K, the terarylene functionalized with tert-butyl groups present different forms on the Ag(111) surface. From the positioning of the high-contrast tert-butyl groups and with the aid of DFT calculations, we assign different conformations of the molecule on the surface. On NaCl/Ag(111), direct visualization of the occupied and unoccupied states could be achieved. This illustrates that for these applications, molecules with appropriate properties can be interesting candidates for STM studies to obtain information at the single molecular level. Such molecules may be redesigned with a consideration of the surface as its mere presence may induce behavior previously unobserved or neglected if they were studied in solution. This thesis opens terarylenes to future applications which require a solid surface
Achoch, Mounia. "Méthodes d’apprentissage et approches expérimentales appliqués aux réseaux d’interfaces protéiques." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAA022/document.
Повний текст джерелаThe aim of this study is to understand protein assembly mechanisms. The assembly of a protein in an oligomer is particularly important because it is involved in many pathologies going from bacterial infection, Alzheimer like diseases or even some cancers. Protein assembly is the combination of two or more protein chains to induce a biological activity. The B subunit of the cholera toxin pentamer (CtxB5), which belongs to the family of AB5 toxins, is studied as the main model of assembly. Experimental results have provided information on the assembly of the toxin highlighting the involvement of certain amino acids. The first problem addressed in my thesis is to understand their role and see if network approaches are relevant to such investigation. I was able to show using amino acid mutations, that amino acids influence each other by cascade or "peer to peer" mechanisms in order to coordinate the various steps of the assembly (Chapters 4, 5 and 6). The structure and function of the proteins are defined by amino acid sequences which naturally vary due to genetic mutation. So I decided to expand this field of investigation to see if the cascade mechanism was generalized as a mean of disrupting a protein structure. Here it is to understand how a protein loses its function by way of a significant change of structure upon mutation. First, I studied dataset to know the characteristics of healthy protein networks (Chapter 7, 8 and 9), and after I looked at the effects of the systematic mutation of each amino acid of CtxB5 on its overall structure (Chapter 10 and 11). Mutations led from moderate to very large structural changes around the mutated amino acid or at long distances. These results are consistent with known effects of mutation: robustness (maintenance function), evolution or adaptation (emergence of a new feature) and fragility (pathologies). The results also show a weak correlation between the number of amino acid contacts of the mutated amino acid and the amount of structural change induced by its mutation. It is therefore not easy to anticipate the effect of a mutation: The last chapter of my thesis addresses this problem (Chapter 12)
Chesnau, Frédérick [Verfasser], and Michael [Akademischer Betreuer] Zharnikov. "Fabrication of Metal-Insulator-Metal assemblies for spintronic devices using self-assembled monolayers / Frédérick Chesnau ; Betreuer: Michael Zharnikov." Heidelberg : Universitätsbibliothek Heidelberg, 2011. http://d-nb.info/1180545710/34.
Повний текст джерелаHaddou, Marie. "Complexes de polyélectrolytes : Morphologies, cinétique et thermodynamique d'assemblage." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0031.
Повний текст джерелаComplexes of polyelectrolytes (PECs) are oppositely charged polymers assemblies held together by electrostatic interaction. As the non-covalent assembly of macromolecules/colloids in solution has been thoroughly investigated over the last decade with a particular emphasis put on the morphology of the final aggregates as a function of the building blocks-chemistry, the objective of this thesis is to come to a better understanding of the influence of interaction strength between polyelectrolytes on complexes morphologies, as well as kinetics and thermodynamics of the complexation. For this study, weakly and strongly interacting systems given rise to coacervate and precipitate phases has been elected. Those systems have been studied on a wide charge ratio scale (Z[+]/[-]) to span several physical states of the PECs (soluble and colloidal PECs, dense phases). Morphologies of assemblies are assessed by microscopy (optical, fluorescence, atomic force) and scattering techniques (neutron, light). Kinetics and thermodynamics of the complexation process are studied by use of a stopped-flow mixing device and an isothermal titration calorimeter. Results gave us keys to discriminate strongly interacting systems from weakly interacting ones. In particular, the ‘strong systems’ are showed to be non-equilibrium assemblies, ie. the formulation pathway or the way these different macromolecules are coming into contact is then a key step. Another important aspect that could explain the complexation process behavior is the hydration energy of the polyelectrolytes. Calorimetry measurements have been performed for numerous polyelectrolytes and then correlated to complexes properties
Upadhyaya, Lakshmeesha. "Self-assembled smart filtration membranes from block copolymers and inorganic nanoparticles." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT242/document.
Повний текст джерелаThis thesis presents a new approach to produce mix matrix membranes using block copolymers and inorganic nanoparticles having magnetic properties. The polymeric nanoparticle with different morphologies (linear, Spheres, worms, and vesicles), from poly (methacrylic acid)-b-(methyl methacrylate) diblock copolymer, were synthesized using Reversible addition−fragmentation chain transfer polymerization (RAFT) in ethanol at 70 ֠C. The inorganic counterpart, iron oxide nanoparticles were prepared using different stabilizers at various temperatures to acquire the necessary surface charge and magnetic properties. The chemistry of the particles leads to form both hydrophobic membranes using non-solvent induced phase separation as well as a hydrophilic membrane by using the simple spin coating technique with the particles from polymerization induced self-assembly. By a detailed experimental study of the membrane filtration, the influence of different parameters on the process performance has been investigated with and without magnetic field. Finally, membrane fouling has been studied using protein solution. Also, the membrane performance was examined under magnetic field revealing the successful reduction in the fouling phenomenon making them new performant membranes in the area of membrane technology
Delafosse, Gregory. "Auto-assemblage de fullerènes C60 sur surfaces d'oxyde de silicium et d'or fonctionnalisées NH2." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10221/document.
Повний текст джерелаIn this work we studied the preparation of sticking amine- terminated molecular layers. On silicon dioxide, 3-aminopropyltrimethoxysilane (APTMS) was de- posited from a solution, and using an original dry method that allowed us to determine time constants of APTMS layer grafting and organization. On gold surfaces, monolayers of aminoethanethiol (AET) and aminothiophenol (ATP) molecules were prepared from a solution. Then, we studied structural and kinetic aspects of ullerene C60 grafting on such sticking layers, terminated by amines either all over the surface or on isolated areas (binary layers). UV-visible, FTIR, Raman and XPS spectroscopy techniques enabled to observe that C60 was grafted on the amine-terminated layers. Exalted Raman spec- troscopy (SERS) revealed ATP molecules were more tilted after C60 grafting under reflux. Analyses of all the layers were made at a molecular level by local probe microscopy (AFM, STM), and electrical measurements performed on gold using the STM tip showed the in- sulating nature of the sticking layer whereas a gap close to that of C60 appeared after grafting of fullerenes. They also highlighted that C60 was selectively grafted on amine- terminated zones within binary sticking layers. At last, one of potential applications of C60 layers being molecular memory cells, electrical properties of the various studied layers were measured through evaporated electrical contact pads
Kerfah, Rime. "Développement de stratégies de marquage isotopique des groupements méthyles pour l'étude d'assemblages protéiques de grande taille par RMN." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENV043/document.
Повний текст джерелаSolution NMR spectroscopy has been limited to small biological objects for a long time. Nowadays, it is unequivocally recognized that the strategy of specific isotope labeling of methyl groups in a perdeuterated protein has significantly extended the frontier of this technique. Indeed, proteins as large as 1 MDa could be investigated by NMR. Conversely, this strategy presents an important drawback consisting of the drastically reduced number of protonated probes. The project of this thesis falls within the framework of developing new methodologies to cope with this scarce structural information, relying on the simultaneous labeling of several methyl groups to increase the number of probes. For optimized combinatorial labeling, the choice of the ensemble of amino acids to label simultaneously and the precursors as well as the protocol for their incorporation have to be carefully studied. In this work, a new protocol was introduced for the scrambling-free and optimized isotopic labeling of AbId1(LV)proS methyl groups. In comparison to the “standard AbId1LV” labeling scheme, the proposed pattern induces a 2-fold decrease of number of Leu and Val NMR signals and enhances the intensity of detectable long-range nOes by a factor 4. The described protocol also permits the suppression of spurious correlations, especially harmful for structural studies based on detection/analysis of nOes. To make an efficient use of the obtained high quality NMR spectra using this protocol, assignment of the methyl groups signals is mandatory. Two strategies were then proposed. The first is suitable for systems whose molecular weight does not exceed 100 kDa. It relies on the use of isotopically linearized precursors (with different isotope topologies to discriminate each methyl group) to assign in a regio- and stereo-specific manner the isoleucine, leucine and valine methyl groups in a single step, employing an optimized “out and back” 13C-TOCSY pulse sequence. While the second, adapted to supra-molecular proteins (> 100 kDa), consists of optimizing the previously reported SeSAM approach (Sequence-Specific Assignment of Methyl groups by Mutagenesis). Indeed, thanks to the developed enriched culture medium for the specific labeling of Ala, the minimal required culture volume was significantly decreased, enabling the proteins expression in 24 well plates and their parallel purification in 96 well plates. This improved SeSAM version was estimated to allow the assignment of ca. 100 methyl cross-peaks in 2 weeks, including 4 days of NMR time and less than 2 k€ of isotopic materials. To illustrate the pertinence of using selectively protonated methyl groups, either in a single or combined fashion, several applications were presented, namely the real-time NMR study of self-assembly process of a ~0.5 MDa supra-molecular protein (PhTET-2). The use of combinatorial labeling for the detection of long-range nOes to up to 10 Å (8 Å) in proteins of 82 kDa (respectively 0.5 MDa) was also investigated. This same approach was exploited for the filtering of inter-monomeric long-range nOes in the same symmetrical and homo-oligomeric PhTET-2 protein
Lopez-Maestre, Hélène. "Analyses et méthodes pour les données transcriptomiques issues d’espèces non modèles : variation de l’expression des éléments transposables (et des gènes) et variants nucléotidiques." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1025/document.
Повний текст джерелаNext-generation high throughput sequencing technologies provide efficient, rapid, and low cost access to sequencing. Its application to transcriptomes, called RNA-seq, enables the study of both the sequence and the expression of the transcripts. Many bio-informatics methods are still developed for RNA-seq data processing, trying to get the maximum out of it. Assembly methods allow us to study non-model species (no reference genome available) as well as model species. The work presented here is mostly related to RNA-seq data on non-model species.In the first study, to understand the initiation of hybrid incompatibility, we performed a genome-wide transcriptomic analysis on ovaries from parental lines and on hybrids from reciprocal crosses of \emph{D. mojavensis} and \emph{D. arizonae}. We didn't see a global deregerulation of genes or transposable element. Instead, we show that reciprocal hybrids presented specific gene categories and few transposable element families misexpressed relative to the parental lines. The analytical workflow developed for this project will be used to analyze transcriptomic data from the testis, but also to study the reciprocal crosses from other lines of D. mojavensis with D. arizonae leading to variable levels of sterility in hybrids. A second project tacked here is the identification and quantification of SNPs from RNA-seq data without a reference genome with KisSplice. Kissplice was developed to identified several type of variants (splicing events, indels) directly from the de Bruijn graph, build from the sequenced reads. We also developed other KisSplice-tools, for downstream analyses of the SNPs, including the prediction of their impact on the protein sequence
Bonifacio, Rafael Nogueira. "Estudo e desenvolvimento de conjuntos membrana-eletrodos (MEA) para célula a combustível de eletrólito polimérico condutor de prótons (PEMFC) com eletrocatalisadores à base de paládio." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-09012014-144413/.
Повний текст джерелаPEMFC systems are capable of generating electricity with high efficiency and low or no emissions, but durability and cost issues prevent its large commercialization. In this work MEA with palladium based catalysts were developed, Pd/C, Pt/C and alloys PdPt/C catalysts with different ratios between metals and carbon were synthesized and characterized. A study of the ratio between catalyst and Nafion Ionomer for formation of high performance triple-phase reaction was carried out, a mathematical model to implement this adjustment to catalysts with different relations between metal and support taking into account the volumetric aspects of the catalyst layer was developed and then a study of the catalyst layer thickness was performed. X-ray diffraction, Transmission and Scanning Electron Microscopy, X-ray Energy Dispersive, Gas Pycnometry, Mercury Intrusion Porosimetry, Gas adsorption according to the BET and BJH equations, and Thermo Gravimetric Analysis techniques were used for characterization and particle size, specific surface areas and lattice parameters determinations were also carried out. All catalysts were used on MEAs preparation and evaluated in 5 cm2 single cell from 25 to 100 °C at 1 atm and the best composition was also evaluated at 3 atm. In the study of metals for reactions, to reduce the platinum applied to the electrodes without performance losses, Pd/C and PdPt/C 1:1 were selected for anodes and cathodes, respectively. The developed MEA structure used 0,25 mgPt.cm-2, showing power densities up to 550 mW.cm-2 and power of 2.2 kWnet per gram of platinum. The estimated costs showed that there was a reduction of up to 64.5 %, compared to the MEA structures previously known. Depending on the temperature and operating pressure, values from US$ 1,475.30 to prepare MEAs for each installed kilowatt were obtained. Taking into account recent studies, it was concluded that the cost of the developed MEA is compatible with PEMFC stationary application.
Roselli, Larissa Yoshida. "Diversidade e Variação Mensal/Sazonal das Aves da Baía de Trapandé, Cananéia, SP. /." São Vicente, 2019. http://hdl.handle.net/11449/180846.
Повний текст джерелаResumo: As praias arenosas e os estuários são ambientes importantes para as aves por serem utilizados como locais de repouso e alimentação, porém ainda há poucas informações sobre a interação das aves com estes ecossistemas. As informações sobre abundância, distribuição e biologia das populações animais são importantes para a preservação dos ambientes estuarinos e das espécies ali presentes. Portanto, este trabalho estudou a assembleia e a dinâmica de populações das aves no Baixio do Arrozal, localizado na Baía de Trapandé, seguindo o pressuposto de que as variações de abundância, dominância e diversidade apresentariam diferenças em relação aos meses e estações do ano. Os dados utilizados foram coletados em censos quinzenais durante o período de abril de 2013 a dezembro de 2016, pelo método do ponto fixo. A partir das amostras obtidas, foram calculadas a frequência de ocorrência, constância abundância, dominância e diversidade. Para o estudo da assembleia foi feito análise de similaridade e teste de correlação com as estações e com os anos de coleta de dados, juntamente com gráfico de barras com erro padrão da abundância total em função da mensalidade e gráfico boxplot deste mesmo índice em função das estações do ano, quanto ao estudo das populações, as variações das abundâncias de cada espécie registrada foram avaliadas através de gráfico boxplot e gráfico de barras com erro padrão em função das estações e da mensalidade. Através da análise de similaridade foram identificados três g... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The sandy beaches and estuaries are important environments to the birds, because they use these places as resting and foraging areas, but there is not a lot of information about the interaction of birds with these ecosystems. Information about abundance, distribution and biology of animal populations are important for preservation of the estuaries and species. Thus, this work studied the assembly and the dynamic population of birds at the Baixio do Arrozal, in Trapandé Bay, supposing the variations of abundance, dominance and diversity would exhibit differences regarding the months and seasons. The data were collected in fortnightly censuses between April 2013 and December 2016, by the point count method. From the collected samples, we calculated the abundance, constance, dominance and diversity index. For the assembly study were made the similarity analysis and correlation test of dominance, abundance and diversity with seasonality and monthly, together with bar chart with standard error to total abundance in function of monthly and a boxplot chart of abundance in function of seasons. For the population study the variations of abundance were evaluated by boxplot chart and bar chart with standard error in function of months and seasons for each registered specie. The similarity analysis resulted in three different groups, which were determined according to abundance and constance, the group I constituted by Thalasseus acuflavidus, Nannopterum brasilianus e Rynchops niger, the... (Complete abstract click electronic access below)
Mestre
Chen, Jingzhi. "Molecular dynamics simulation of the self-assembly of icosahedral virus." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS326/document.
Повний текст джерелаViruses are known for infecting all classes of living organisms on Earth, whether vegetal or animal. Virions consist of a nucleic acid genome protected by a single or multilayered protein shell called capsid, and in some cases by an envelope of lipids. The viral capsid is generally made of hundreds or thousands of proteins forming ordered structures. Half of all known viruses exhibit an icosahedral symmetry, the rest being helical, prolate or having a complex irregular structure. Recently, viral particles have attracted an increasing attention due to their extremely regular structure and their potential use for fabricating nanostructures with various functions. Therefore, understanding the assembly mechanisms underlying the production of viral particles is not only helpful to the development of inhibitors for therapeutic purpose, but it should also open new routes for the self-assembly of complex supramolecular materials. To date, numerous experimental and theoretical investigations on virus assembly have been performed. Through experimental investigations, a lot of information have been obtained on virus assembly, including the proper conditions required for the assembly and the kinetic pathways. Combining those information and theoretical methods, an initial understanding of the assembly mechanism of viruses has been worked out. However, information coming purely from experiments cannot give the whole picture, in particular at a microscopic scale. Therefore, in this thesis, we employed computer simulations, including Monte Carlo and molecular dynamics techniques, to probe the assembly of virus, with the expectation to gain new insights into the molecular mechanisms at play
Rippe, Marlène. "Systèmes transporteurs de principes actifs hydrophobes à base de glycoaminoglycanes thermosensibles : vers une plateforme polyvalente de délivrance." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAV004/document.
Повний текст джерелаIn the field of drug delivery systems, polymeric nanogels obtained by the self-assembly of biocompatible amphiphilic polymers in water have emerged as one of the most promising nanocarriers for various hydrophobic drugs. These systems offer several advantages such as enhanced hydrophobic drug solubility in water, decreased side effects, and improved drug delivery to tumor tissues via the enhanced permeability and retention (EPR) effect. In this regard, stimuli-responsive polymeric nanogels are attractive platforms for drug delivery due to their ability to change their physical and/or chemical properties in response to an external stimulus such as light, magnetic field, pH or temperature. Thermoresponsive polymers are particularly interesting due to their ability to undergo a reversible thermally-induced phase transition without the need of additional reagents. In this context, our aim was to engineer and to study a new class of thermoresponsive, biocompatible and biodegradable nanogels based on glycoaminoglycans (GAGs) through the modification of the polysaccharide backbone with a thermoresponsive copolymer of di(ethylene glycol) methacrylate (DEGMA) and n-butylmethacrylate (BMA)). The latter was properly designed to obtain stable nanogels at room temperature. The versatile synthetic route to nanogels also allowed their further shell-crosslinking to capture the nanogel structure at low temperature. The choice of the GAGs forming the hydrophilic shell can be exploited to control their biological behavior. In order to use these systems as a versatile platform for delivery of active ingredients and other molecules of interest, we investigated the possibility of incorporating iron oxide nanoparticles for magnetic guidance, imaging and hyperthermia treatment. The syntheses of the magnetic component as well as the design of the nanocarrier are key steps to achieve a magnetically-responsive nanodelivery system capable of efficient targeting
Berglund, Jenny. "Structure-function studies of organelle assembly and receptor recognition in organelles assembled via the chaperone/usher pathway /." Uppsala : Dept. of Molecular Biology, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/a441.pdf.
Повний текст джерелаChitty, J. Stephen. "The implementation of a post-denominational model of church government at Christian Life Assembly." Theological Research Exchange Network (TREN), access this title online, 2006. http://dx.doi.org/10.2986/tren.068-0616.
Повний текст джерелаBaudry, Lyam. "Investigating chromosome dynamics through Hi-C assembly." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS026.
Повний текст джерелаThe advent of high-throughput DNA sequencing technologies has set off an expanding trend in genome assembling and scaffolding. Such genome quality is an essential preliminary to understand interactions between and among chromosomes. We built upon a computational and technological framework that let us tackle genome assembly problems of increasing complexity. Our methods are mainly based on chromosome conformation capture technologies such as Hi-C. In a Hi-C experiment, DNA molecules are cross-linked with the surrounding proteins and form a large, static protein-DNA complex. This captures the spatial conformation by trapping together molecules that are physically close to each other. Therefore, Hi-C is very suitable for 3D genome structure analysis, which lets us infer a wealth of information about the genome. It was indeed shown that the tridimensional structure of the genome can be unambiguously linked to its 1D structure thanks to the physical properties of DNA polymers. Moreover, such 3D proximity also gives access to cell compartment information, thus opening the way for an additional approach for metagenomic binning, known as meta3C. In this work, we expand upon these methods and apply them to use cases with more and more complexity. We first improve on tools for genome assembly and demonstrate their validity with the scaffolding of Ectocarpus sp., then unveil rearrangements in joint scaffoldings of Trichoderma reesei and Cataglyphis hispanica. Lastly, we use the same approach with metagenomic binning on live mouse microbiome samples to reconstruct hundreds of genomes
Martins, Cleber Ori Cuti. "Processos participativos nas assembleias legislativas : estrutura, dinâmicas e limites." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/67256.
Повний текст джерелаThis thesis is an analysis of the participation of social organizations in the legislative assemblies in the period 2003-2010. In all state parliaments is forecast in its internal rules, and participatory mechanisms, which are classified into two groups. The first is composed of instances aimed at providing the manifestation of social organizations and even individuals. This group of public audiences, thematic forums, seminars, popular discourse on tribunes during legislative sessions and attending meetings of legislative committees. The second group of participatory processes incorporates the presentation of proposals, including bills of popular initiatives, legislative proposals and suggestions. In 2002 starts the process of creating commissions participatory legislation in state parliaments of the states of Acre, Alagoas, Amazonas, Mato Grosso do Sul, Rio Grande do Sul, Santa Catarina, Paraiba, Sao Paulo and Minas Gerais. The study also includes an analysis of the content of legislative output of the state representatives of the legislatures of Rio Grande do Sul, Santa Catarina, São Paulo and Minas Gerais, where there was a record of proposals sent to their respective commissions participatory legislation, including period before the formation of committees (1995-1998 and 1999-2002) and the period after the beginning of its activities (2003-2006 and 2007-2008). The presentation of proposals by social organizations, even after the formation of committees of participatory legislation, failed to materialize. Even in the case of the Committee on Legislation Popular de Minas Gerais, where there is a large number of propositions, more than half between 2003 and 2010 originated in structures coordinated by the Executive Branch. The content of legislative production in states with commissions also did not change effectively.
Baker, Bryan Alexander. "Employing double-stranded DNA probes on colloidal substrates for competitive hybridization events." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33922.
Повний текст джерелаCarter, Timothy Glen 1976. "New supramolecular assemblies of toxic metal coordination complexes." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/10562.
Повний текст джерелаSupramolecular chemistry is a relatively new and exciting field offering chemists simplistic approaches to generating complex assemblies through strategically designed ligands. Much like the many spectacular examples of supramolecular assemblies in nature, so too are chemists able to construct large, elegant assemblies with carefully designed ligands which bind preferentially to target metal ions of choice. An important concept of supramolecular chemistry, often subtle and overlooked, is secondary bonding interactions (SBIs) which in some cases, act as the glue to hold supramolecular assemblies together. This dissertation examines SBIs in a number of systems involving the pnictogen elements of arsenic and antimony as well as aromatic interactions in self-assembled monolayers. The first half of this dissertation is an introduction to the concepts of supramolecular chemistry and secondary bonding interactions and how they are used in the self-assembly process in the Darren Johnson laboratory. Chapter I describes how secondary bonding interactions between arsenic and aryl ring systems and antimony and aryl ring systems assist with the assembly process. Chapter II is a continuation of the discussion of SBIs but focuses on the interactions between arsenic and heteroatoms. The second half of this dissertation will describe work performed in collaboration with Pacific Northwest National Laboratory (PNNL) in Richland, WA. This work was performed under the guidance of Dr. R. Shane Addleman in conjunction with Professor Darren W. Johnson of the University of Oregon. This portion describes novel systems for use in heavy metal ion remediation from natural and unnatural water sources. Chapters III-V describe functionalized mesoporous silica for use in heavy metal uptake from contaminated water sources. Chapter V describes a new technology invented during this internship at PNNL which utilizes weak bonding interactions between aryl ring systems to produce regenerable green materials for toxic metal binding. This work is ongoing in the Darren Johnson lab. This dissertation includes my previously published and co-authored material.
Committee in charge: Michael Haley, Chairperson, Chemistry; Darren Johnson, Member, Chemistry; Shih-Yuan Liu, Member, Chemistry; James Hutchison, Member, Chemistry; Eric Johnson, Outside Member, Biology
Hendrick, Gary. "Modeling and Experimentation of Micro-Scale Self-Assembly Processes." Scholar Commons, 2010. https://scholarcommons.usf.edu/etd/1656.
Повний текст джерелаGence, Valérie. "Auto-assemblage dynamique de nano-objets pour de nouvelles voies de transport membranaire dirigé." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20263/document.
Повний текст джерелаThe main topic of this thesis concerns the synthesis and characterization of novel bioinspired membrane materials whose primary function is the transport of chemical species directed . The realization of these systems is based on the self-assembly of building blocks ( molecular , polymeric ) whose properties will induce directional transport in new materials.First, the synthesis of new bola - amphiphilic compounds was shown . They were then examined by fluorescence spectroscopy and dynamic light scattering allowed to highlight their ability to form ion channels, proton channels and water channels in a lipid bilayer.A second study involved the development of mesoporous nanomaterials membrane. These have been functionalized with hydrophobic groups to allow the confinement of the compounds in the mesopores via van der Waals interactions.Finally, a recent study has focused on the development of materials membrane based on artificial Aquaporins in order to obtain a material to transport water directed through the membrane
Wang, Xuan. "Fabrication, structural and optical study of self-assembled hyperbolic metamaterial." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0694/document.
Повний текст джерелаNovel optical properties in the visible range are foreseen when organizing nanoresonators, which can be performed by the self-assembly of plasmonic nanoparticles prepared by wet chemistry. In this project, we use templating block copolymers structures to organize plasmonic particles. Our goal is to relate the structure of the prepared nanocomposites thin films, and in particular the nature, density and spatial organization of the nanoparticles, with their optical index.For this purpose, we first fabricate lamellar superlattices of diblock copolymers (poly(styrene)-block-poly(2-vinylpyridine) of controlled thickness (100nm-700nm), controlled lamellar period size(17 nm-70 nm) and optimized alignment and homogeneity. Following the fabrication of the multilayer templates, an in situ and reproducible synthesis of metallic nanoparticles was developed in order to generate nanocomposites selectively inside the P2VP layers. The size of Au nanoparticles can be well controlled around 7-10 nm. We also found that the reduction process could influence the shape (sphere, triangle or cylinder) and size by using different solvents or reducing agents. Because the extraction of accurate optical responses from the spectroscopic ellipsometry data, which will come in the last part, critically relies on the precise knowledge of the sample structure. We have used several experimental techniques to access a precise description of the produced materials. In particular, we used a Quartz Crystal Microbalance as a measurement tool to ‘kinetically’ study the volume fraction of Au loading. We find that the amount of gold in the composite layers can be varied up to typically 40 volume%. The optical properties of the nanocomposite films are determined by variable angle spectroscopic ellipsometry and analyzed by appropriately developed effective medium models. The films are structurally uniaxial and homogeneous, and we can define their dielectric permittivity tensor with the ordinary (parallel to the substrate) and extraordinary (normal to the substrate) components. The analysis of the lamellar structures allows the extraction of the components εo and εe, both presenting a resonance close to =540nm, with a significantly stronger amplitude for εo. When the gold load is high enough and the couplings between particles are strong enough, the values of εo become negative close to the resonance, and the material reaches the so-called hyperbolic regime, which constitutes a step towards applications in hyper-resolution imaging
Wietrzynski, Wojciech. "Rubisco biogenesis and assembly in Chlamydomonas reinhardtii." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066336/document.
Повний текст джерелаThe necessity to coordinate the expression of genes originating from different genomes within the plant cell resulted in the appearance of mechanisms imposing nuclear control over organelle gene expression. Anterograde signaling through sequence-specific trans-acting proteins (OTAFs) coexists in the chloroplast with an assembly dependent control of chloroplast synthesis (CES process) that coordinates the stoichiometric formation of photosynthetic complexes.Ribulose bisphosphate carboxylase/oxygenase (Rubisco) is a chloroplast-located carbon fixing enzyme constituted of two subunits. Large subunit (LSU) and small subunit (SSU) are encoded in the chloroplast and nuclear genomes respectively. In the stroma they assemble to form a hexadecameric holoenzyme (LSU8SSU8). In this study I tried to highlight major regulatory points of its synthesis in Chlamydomonas reinhardtii focusing on the posttranscriptional regulation of LSU.I showed that the MRL1 PPR protein is a limiting factor for rbcL mRNA accumulation. Whereas it has been previously designated as a stabilization factor for the abovementioned transcript, MRL1 appeared also to have a function in rbcL translation.Most notably, I have demonstrated that in Chlamydomonas reinhardtii Rubisco expression is controlled by the small subunit (SSU) presence. In its absence rbcL undergoes an inhibition of translation through its own product – the unassembled Rubisco large subunit. This process depends on LSU-oligomerization state as I was able to show that the presence of a high order LSU assembly intermediate bound to the RAF1 assembly chaperone is essential for the regulation to occur. In parallel I shed light on the fate of unassembled LSU in a deregulated CES context, thereby improving our understanding of the process of its folding and assembly