Dissertations / Theses on the topic 'BRKI'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'BRKI.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Blechová, Klára. "Úvěrové registry a jejich využití." Master's thesis, Vysoká škola ekonomická v Praze, 2017. http://www.nusl.cz/ntk/nusl-359454.
Full textLu, Ying. "Interaction du bio-brai avec le coke : effet du bio-brai sur la formulation d'anode." Doctoral thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/67909.
Full textAluminium producers are constantly facing challenges regarding the increase in production costs including those related to coal-tar-pitch (CTP). CTP, a fossil material with carbon footprint, is used as binder to produce carbon anodes. Regardless of the technical benefits of CTP, it contains polycyclic aromatic hydrocarbons (PAHs), known to be carcinogenic for humans and detrimental to the environment. Furthermore, the escalating production capacity of aluminium during the past 3 decades exerts a considerable pressure on the pitch supply chain. To overcome this challenge, alternative sources to CTP capable of addressing the health issues and zero carbon footprint without decreasing anode quality, are thus of great interest. Bio-pitch, produced from bio-oil, could be a good candidate in this regard. However, the properties of bio-pitch could be significantly different from those of CTP depending on its origins and process conditions. This study focuses on the synthesis of bio-pitches from bio-oil under different pyrolysis conditions and characterization of its physical and chemical properties, aiming at determining the conditions which may result in suitable properties for anode formulation. We first synthesized biopitch from bio-oil under different conditions. The resulting biopitches were deeply characterized in order to understand the effect of process parameters on their properties. Among these typical characterizations are determination of density, softening point, coking value, quinoline insoluble, PAH content, molecular weight, viscosity, elemental composition, chemical structures as well as the reaction mechanisms occurring during the pyrolysis process. Then we focused on characterisation of biopitch interaction with coke in order to assess its behaviour and its role, as a binder, in anode formulation. Information on the wetting capacity of bio-pitch on the surface of coke particle is also of great interest in assessing its possible use as a renewable and environmental-friendly binder. It was shown that the wettability of bio-pitch is greatly influenced by its viscosity, surface tension, surface chemical functional groups, amount of quinoline insoluble, and molecular weight distribution. The good wettability of bio-pitch enhances the anode densification, thus mitigates the negative effect of its low coking value on the baked anode density. In order to improve the bio-pitch properties, the investigation to increase the QI content thereby to vi improve its coking value by adding different amounts of solid bio-char as an additive were also studied
Sanseigne, Eric. "Mécanismes de formation de porosité au cours du traitement thermique d'un matériau coke-brai filé : relation avec l'évolution physico-chimique du brai." Mulhouse, 1993. http://www.theses.fr/1993MULH0294.
Full textNutz, Michel. "Carbonisation et graphitation de mélanges brai de houille-graphite pulvérulent." Nancy 1, 1995. http://www.theses.fr/1995NAN10248.
Full textDumont, Mikaël. "Composites Carbone/Carbone 3D densifiés par imprégnation/carbonisation de brai mésophasique." Bordeaux 1, 2001. http://www.theses.fr/2001BOR12344.
Full textGuajioty, Eric. "Etude du ressuage en recuisson d'électrodes de carbone imprégnées au brai." Grenoble INPG, 1989. http://www.theses.fr/1989INPG0074.
Full textHägebarth, Andrea. "Brk tyrosine kinase signaling in the gastrointestinal tract." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2005. http://dx.doi.org/10.18452/15379.
Full textThe Breast tumor kinase Brk is a prototypical non-myristoylated, non-receptor tyrosine kinase. Brk expression is epithelial-specific and ,in normal tissues, restricted to cells exiting the cell cycle and undergoing terminal differentiation. To determine the biological role of Brk in the gastrointestinal tract, we disrupted mouse brk by homologous recombination. Loss of Brk in the mouse resulted in increased intestinal epithelial cell turnover and the appearance of longer small intestinal villi. Brk deficient mice displayed enhanced accumulation of nuclear (-catenin and upregulation of the (-catenin target gene c-myc in the crypt compartment of small and large intestine. In addition, Brk deficient mice exhibited increased Akt kinase activity. Even though, there was no corresponding difference in base-line apoptosis in untreated wild-type and knockout animals. However, subjected to (-irradiation, Brk deficient animals were significantly impaired in the apoptotic response. Wild-type mice, however, exhibited normal levels of apoptosis following (-irradiation accompanied by a rapid induction of Brk expression in crypt cells. Furthermore, chronic inflammation was observed in Brk deficient mice, and they showed increased susceptibility to a colon injury model utilizing DSS. Interestingly, wild-type mice exhibited a significant upregulation of nuclear Brk protein throughout the intestinal epithelium in response to DSS. These recent findings suggest that Brk plays a crucial role in the maintenance of intestinal tissue homeostasis and integrity. In addition, Brk may function to protect the intestinal epithelium against DNA-replication-induced errors and hence the development of cancer. Contrary to reported oncogenic properties of Brk in other epithelial tissues, Brk appears to have tumor suppressor-like functions in the mouse gastrointestinal epithelium.
Lim, Shok Ping. "miR-181c modulates T cell function by regulating the expression of BRK1." Thesis, King's College London (University of London), 2017. https://kclpure.kcl.ac.uk/portal/en/theses/mir181c-modulates-t-cell-function-by-regulating-the-expression-of-brk1(fecd247a-3bb9-4fce-92c9-f1f5aeab2ffe).html.
Full textMalhotra, Divya. "brk1 and dcd1 Act Synergistically in Subsidiary Cell Formation in Zea mays." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc799473/.
Full textSmith, Justyn Glynn. "Essence, Revelation, and Physicalism." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103599.
Full textMaster of Arts
When you taste a Golden Delicious apple, drink Ethiopian coffee, feel dental pain, hear classical music or have many other conscious experiences of things, there's *something it's like* to be in those states. The taste of the apple and the coffee and the feel of dental pain are phenomenal properties - the "feels" of things in the broadest possible sense. Philosophers wonder what these things - "feels" - really are. Are they neurological features of your brain or a material features generally or are they something different? In a recent essay, Antonin Broi attacks the idea that they are something other than material or brain states. If Revelation - the idea that experiences reveal the essences of phenomenal properties - and some ideas about the general nature of phenomenal properties are both true, then strange results arise. I argue against his reasoning and I give a better way to understand Revelation.
Pickford, Fiona Charis Felicia. "Modelling familial British dementia and Alzheimer's disease using BRI transgenic mice." Thesis, King's College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411988.
Full textHilst, Maria Antonieta Santiago. "Avaliação da estabilidade de oleo de soja acondicionado em latas e na embalagem tetra brik." [s.n.], 1999. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254536.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
Made available in DSpace on 2018-07-25T17:40:32Z (GMT). No. of bitstreams: 1 Hilst_MariaAntonietaSantiago_M.pdf: 3945406 bytes, checksum: 404256b30c1a4026b30adf750d545012 (MD5) Previous issue date: 1999
Resumo: Objetivou-se nesta pesquisa avaliar o comportamento do óleo de soja acondicionado em embalagem Tetra Brik (sem inertização), em comparação com as tradicionais latas inertizadas e não inertizadas, com relação à rancidez oxidativa, sob condições ambiente de armazenamento, durante o período de 12 meses. Uma determinação adicional foi realizada após 18 meses de estocagem. Neste período de avaliação, a temperatura e umidade relativa média do local de estocagem das amostras foram de 22.7°C e 60.7%, respectivamente. As amostras foram abertas mensalmente para acompanhamento da estabilidade do produto através de determinações de índice de peróxido, índice de anisidina, índice TOTOX e porcentagem de dienos conjugados. Os testes sensoriais foram conduzidos após 6,8, 10, 12 e 18 meses de estocagem. O método sensorial aplicado consistiu em avaliar o óleo de soja acondicionado nas embalagens de estudo em relação a uma amostra em lata inertizada que foi estocada a -20°C para ser utilizada como padrão. O fator que determinou a vida-de-prateleira do produto, em qualquer sistema de embalagem utilizado, foi a avaliação sensorial. Após 8 meses de estocagem, a equipe de provadores identificou alteração significativa (p= 0.05) no óleo de soja em relação à amostra de referência (-20°C). Tanto nas determinações físico-químicas como sensoriais, as latas sob atmosfera de nitrogênio apresentaram resultados mais baixos quando comparados com o sistema Tetra Brik e lata sem mertização, proporcionando uma melhor proteção ao produto. Dentre os parâmetros físico-químicos avaliados, o índice de peróxido e o índice TOTOX foram os mais adequados para a determinação da estabilidade do óleo de soja no período do processo oxidativo em que se encontrava. Altas correlações lineares foram obtidas entre esses parâmetros e as médias sensoriais
Abstract: The aim of this research was to evaluate the behavior of the soybean oil packed in Tetra Brik (without nitrogen atmosphere), compared to traditional cans (with or without nitrogen atmosphere), regarding their oxidative rancidity under ambient storage conditions during a period of 12 months. The additional determination was done after 18 months of storage. In this period of evaluation the average temperature and relative humidity at the storage room were 22.7°C and 60.7% respectively. The samples were open monthly for a product stability follow-up through determination of peroxide index, anisidine value, as well as TOTOX value and percentage of conjugated diene. The sensorial tests were conducted after 6, 8, 10, 12 and 18 months of storage. The sensorial method applied consisted of assessing the packed soybean oil in the packages under study against a sample in can with nitrogen atmosphere that was stored at -20°C to be used as standard. The sensorial method has determined of the shelf-life of the product in any of the packaging systems used. After 8 months of storage, the sensorial panel identified a significant alteration (p=0.05) in three packed soybean oil in relation to reference sample. Both in the physical-chemical and sensorial determinations, the cans under nitrogen atmosphere presented lower results when compared to the Tetra Brik system and the can without nitrogen atmosphere, providing, thus, a better protection to the product. Among the physical-chemical parameters evaluated, the index of peroxide and TOTOX value were the most suitable for the stability of the soybean oil. High linear correlations were obtained between these parameters and the sensorial results
Mestrado
Mestre em Tecnologia de Alimentos
Dong, Shuojia. "Influence des traitements thermiques et superficiels sur les propriétés des fibres de carbone ex-brai." Mulhouse, 1989. http://www.theses.fr/1989MULH0110.
Full textPrates, Camila Camargo. "Bri(n)coleur : uma experiência de pesquisa e formação em pedagogia hospitalar." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/72122.
Full textThis dissertation aims at investigating some pathways of meaning in the process of learning that emerged in the context of a playful space-teaching at the CIVITAS - Education and Health research project (LELIC/ PPGEdu/ UFRGS) - and which produced a composition work with this study. It proposes a way of recreational and educational intervention and research training related either to a group of children and adolescents as patients in a hospital or to a group of hospital educators both groups situated at the Hospital de Clínicas in Porto Alegre/RS. Through a cartographic exercise - that involved diaries, maps of meaning and flowcharts as production of data devices - that some relations between utterances and teaching-learning processes have been established and by which it has been intended to investigate: ways of becoming an educator and ways of becoming a student in a hospital environment. Under the philosophy of difference bias it has been addressed the disjunction between seeing and speaking in research, and that it has been thought to led the language onto "regions of intensity". From the image of a conceptual character - the bri(n)coleur teacher - it has been build up a writing as a escaping movement through which impersonal events have been analyzed, what goes on between the subjects. It is the ethical-aesthetic act of the educator that proposes to think meaning production in language. Thus, it is aesthetic movements in the learning as a process and not just the direct learning that occurs by recognition that have been considered. Concepts of health, disease, life and death have been discussed and with which it has been coexisted throughout the proposal endurance and through which new biases of existence in the ethics and aesthetics of the educator who works in this environment have been thought. Time has been thought - specially the future - unlinked from anticipations and predictions, though linked to the work of art as an inventive effort and creator of life itself. The intention was to contribute to the establishment of a learning space conducive to building conceptual experiences in relation to affective and perceptual experiences, to reflect the pedagogical practice of educators committed to this service, as well as to think about teaching practices that could leverage creative processes in the mentioned environment. The analysis output took place in two processes: one in the field of analytical reflection, and the other in the aesthetic-literary experimentation. The procedure then has become the actual process, the event itself, since it caused a shift of the empirical field, having experienced the process of writing as a new situation. And an analytic one which has been proposed to trial and has shown the capture of what has itself been touched. It is considered that the educator who works in this intuitive artistic perspective of production of itself and the world would be closer to life itself. Based on the understanding that social relations are given in the language and that language is political, via the proposition of the attention to expressions and utterances that permeate the hospital educational area, it is expected to contribute to those who have interest in pedagogical practices in this environment. Results give clues to think that the educator in a hospital environment can become an intercessor, establishing dialogical relations between health and education, through constant reflection and questioning of their own pedagogical practice that may allow an act-uttering in constant learning.
ZIMNY, THIERRY Weber Jean-Victor. "ETUDE DE LA MODIFICATION DU COMPORTEMENT THERMIQUE DES BRAIS ET DES MELANGES BRAI/COKE PAR LE SOUFRE /." [S.l.] : [s.n.], 1993. ftp://ftp.scd.univ-metz.fr/pub/Theses/1993/Zimny.Thierry.SMZ9315.pdf.
Full textZimny, Thierry. "Etude de la modification du comportement thermique des brais et des mélanges brai/coke par le soufre." Metz, 1993. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1993/Zimny.Thierry.SMZ9315.pdf.
Full textCoal tar Pitches (CTP) are the residues of cokefaction tar distillation. Their thermal behaviour could be modified by the utilization of additives like sulfur. This work is a systematic study of the factors which can modified the thermal behaviour of the CTP/coke blends, precursors of graphite materials, like the chemical composition of the CTP, the initial sulfur percentage, the heat law or the origin and properties of cokes. We have divided our work in two parts. In a first time we have studied the thermal behaviour of the CTP/sulfur mixtures. We have clearly shows the positive effect of sulfur on mesophase formation and in consequence on optical texture. Crieria have been defined, allowing to connect the blends thermal reactivity to the chemical composition of the CTP and more precisely, we have precised the light fraction role of CTP during thermal treatment and the role of QI on optical texture evolution. Utilization of spectoscopic and thermic methods allows us to follow evolution of sulfur structures and their stabilities in function of temperature. In the second part of this work, we have studied effect of coke addition on physical texture of CTP and thermal behaviour of CTP/coke/sulfur mixtures. Cokes have been characterized by their surface energies and morphologies. We have then tried to understand the physical phenomena on the CTP/coke interfaces using a non direct method based on selective solvant extraction of a CTP previously adsorbed on coke surface. The results show a modification of the CTP physical structure, put in evidence by an increase of the hexane yield extraction in a case of CTP/coke blends and by an evolution of the chemical composition of the hexan soluble fraction. All the results of this work is usefull for the comprehension of the sulfur role in CTP and for the adaptation to the industriel processes of graphite making
Cardoso, Letícia de Brito. "Jogar-brincar : da maneira de executar as propostas à circulação no território da arte." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2005. http://hdl.handle.net/10183/27996.
Full textThis research project deals with the procedures for carrying the art works produced between 2002 and 2005, which take places between the execution of actions and photographic and video records. It also deals with the use of the album and book as a vehicle for distribution in the Territory of arts. It uses the terms play and territory of art with reference to the philosopher Johan Huizinga and the artist Allan Kaprow. Play isapproached s a way of carrying out proposals and also setting up a dialogue with the rules estabilished by a defined territory of art, which enables the encounter with the spectador.
Ferland, Jacqueline. "Étude de la valeur d'usage de brais d'imprégnation /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1989. http://theses.uqac.ca.
Full textGérard, Isabelle. "Pyrolyse de brai de houille ou de charbons cokéfiants en présence de MoCl5 libre ou intercalé dans du graphite pulvérulent." Nancy 1, 1998. http://www.theses.fr/1998NAN10289.
Full textPilhofer, Christoph. "Rückfussarthrodesen bei Polyarthritikern zwischen 1974 und 1997 an der I. Orthopädischen Klinik des BRK Rheuma-Zentrums Bad Abbach /." Aachen : Shaker, 2001. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009328899&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full textBrui, Natallia [Verfasser], Sauerbier [Akademischer Betreuer] Michael, Annika [Akademischer Betreuer] Arsalan-Werner, Michael [Gutachter] Sauerbier, and Johannes [Gutachter] Frank. "Langzeitergebnisse nach plastisch-chirurgischer Defektdeckung durch neurovaskulären Insel-Lappen bei Fingerkuppenverletzungen / Natallia Brui ; Gutachter: Michael Sauerbier, Johannes Frank ; Sauerbier Michael, Annika Arsalan-Werner." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2021. http://d-nb.info/1239729820/34.
Full textGabriella, Öström, and Högström Lina. "Symtomförekomst och noceboeffekter hos individer med byggnadsrelaterad ohälsa." Thesis, Umeå universitet, Institutionen för psykologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149104.
Full textBuilding Related Illness (BRI) is one of several environmental sensitivities. The two constructs Modern Health Worries (MHW) and Somatosensory Amplification (SSA) have both been shown to be linked to nocebo and are often reported by people with environmental sensitivities. The first purpose of this paper was to increase the understanding of symptoms that characterize BRI, which was investigated via 20 items selected from The Idiopathic Enviromental Intolerance Symptom Inventory (IEISI) that complies with WHO's list of BRI symptoms. The second purpose was to increase knowledge about the role of nocebo in BRI, which was investigated via Modern Health Worries Scale (MHWS) and Somatosensory Amplification Scale (SSAS). Data was obtained from an ongoing study at Umeå University. The sample consisted of 79 individuals who reported that they experienced BRI symptoms each week. Data was analyzed via correlation analyzes. The group showed variability concerning which and how many symptoms the individuals reported. The results from the correlation analyzes showed that nocebo did not play a significant role in the reporting of BRI symptoms in the selection group. The study showed that the group of BRI patients neither worry more than the norm nor was particularly sensitive to sensory impressions.
Cottinet, Denis. "Étude d'un nouveau procédé de traitement thermique de brai de houille par microondes : contribution de la microspectrométrie Raman à la caractérisation de ces matériaux." Lille 1, 1988. http://www.theses.fr/1988LIL10091.
Full textGuillet, Stéphanie. "Monogenic predisposition to systemic lupus erythematosus and efferocytosis Impaired efferocytosis and Systemic Lupus Erythematosus in patients with autosomal recessive ACK1 and BRK Kinases deficiencies." Thesis, Sorbonne Paris Cité, 2019. http://www.theses.fr/2019USPCB003.
Full textSystemic Lupus Erythematosus (SLE) is a collection of autoimmune diseases characterized by auto-antibodies against nuclear antigens. Pathogenesis of SLE remains unclear and disease mechanisms may be multiple. Here we report the identification of autosomal recessive loss-of-function variants in the kinase domain of ACK1 and BRK, in patients from two families with SLE. Using patients and controls iPSC-derived Tim4+ resident-like macrophages we find that wild-type ACK1 and BRK are dispensable for phagocytosis of bacteria and fungi, but are both required for efficient efferocytosis, including actin-mediated engulfment of apoptotic cells by human macrophages, and an early cell-autonomous anti-inflammatory gene expression program driven by AKT and STAT3 and triggered by apoptotic cells. These results indicate that ACK1 and BRK kinases activity are required for the immunologically silent clearance of apoptotic cells by macrophages and define genetic efferocytosis deficiency in a subset of SLE patients who may benefit from personalized therapy in the future
Bouchard, Nathalie. "Pyrolyse de divers brais utilisés dans la technologie söderberg et analyse des matières volatiles /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1998. http://theses.uqac.ca.
Full textCottinet, Denis. "Etude d'un nouveau procédé de traitement thermique de brai de houille par micro-ondes contribution de la microspectrométrie Raman à la caractérisation de ces matériaux /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37612749b.
Full textSarmeo, David. "Insertion de chlorure de manganèse dans les fibres de carbone (ex-mésophase de brai) à l'aide de complexes gazeux : application au dosage de l'énergie thermique." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0191.
Full textSARMENTO, FILHO Jarbas da Silveira Coelho. "Estética e funcionalidade na aplicação do granito preto da Região do Pombal-PB." Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/10212.
Full textMade available in DSpace on 2015-03-03T19:19:53Z (GMT). No. of bitstreams: 2 TESE Jarbas da Silveira Coelho Sarmento Filho.pdf: 4394610 bytes, checksum: 6d79fd1b803931eab78dffded03d8549 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2013-07-27
CAPES
Este trabalho disserta, à luz da estét ica, sobre fatores pert inentes às especi ficidades do material em estudo, abordando um di recionamento para a ot imização de sua apl icação ornamental nos diferentes usos, mais ou menos suscept íveis à al terabi l idade. Trata-se de t ipo pet rográfico dior i to-gabróide, ocor rente no Sí t io Trinchei ra , município de Pombal – PB, o qual é invest igado com base nas observações de campo e laboratório, destacando o bloco de part ição, que permi te antevisão da anisot ropia da rocha . Out rossim, na expectat iva da maior ou menor suscept ibi l idade à oxidação ou hidratação nos locais de apl icação, enfat iza-se anál ise das característ icas mineralógicas, texturais e estruturais, macroscópicas e microscópicas da rocha, visando à sua reprodut ibi l idade, fator importante na escolha e adequação para o seu uso ot imizado. Part indo do conhecimento de que a al terabi l idade varia em função da granulomet ria e do conteúdo químico da fórmula molecular dos minerais essenciais e acessór ios da rocha, anal isaram-se e ut i l izaram-se medidas de refletâncias nos di ferentes espect ros de cores e no bri lho , os quais permi tem suspei tar e ident i ficar potencial de al terabi l idade, em analogia com a composição supraci tada e a textura pet rográfica, sempre na perspect iva da estét ica. O bri lho diminuiu após o ataque químico, todavia os índices de diminuição foram notadamente maiores após o ataque do reagente água sani tária, em relação aos resul tados de al teração pelo ataque dos reagentes mul t iuso e detergente. A textura da rocha revelo u que a presença de fissuras, embora esparsa, foi condição cont ribuinte com a acentuação da al terabi l idade. Na escala de invest igação microscópica, confi rma -se uma composição essencialmente cálcica dos minerais incolores e mais magnesiana dos minerais coloridos, sendo o primei ro fator contr ibut ivo à boa qual idade do bri lho original , enquanto o segundo fator inibe a al terabi l idade. Finalmente a anisot ropia indicada pelo bloco de part ição da rocha most rou -se extensiva para a escala microscópica e permi te adic ionais aprovei tamentos de paginação de placas por ocasião de projeto e planejamento de ut i l ização.
Nobre, Camila Pinheiro. "Fungos micorr?zicos arbusculares em bri?fitas e ra?zes modificadas de manjeric?o (Ocimum basilicum L.)in vitro / Camila Pinheiro Nobre." Universidade Federal Rural do Rio de Janeiro, 2011. https://tede.ufrrj.br/jspui/handle/jspui/1218.
Full textMade available in DSpace on 2016-09-21T15:12:59Z (GMT). No. of bitstreams: 1 2011 - Camila Pinheiro Nobre.pdf: 2714138 bytes, checksum: bc436d879ddfded703d4d5fea9f9943c (MD5) Previous issue date: 2011-02-17
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior-CAPES
The aim of this study was to observe the germination, production of glomalin and monitor development of species of mycorrhizal fungi (AMF) of the germplasm bank of Embrapa in root organ culture (ROC) of basil and bryophytes in vitro, analyzing their interaction with the hosts and the influence of the culture medium enriched with humic acids on fungal growth and bryophyte Lunularia cruciata. For this, some AMF species were selected and had their glomerospores extracted and subjected to surface disinfection process, placed in water-agar medium and temperature-controlled chamber to germinate. A germination test was conducted for 15 days, and the results were analyzed by ANOVA and Tukey test applied to 5% probability. Species with germinated glomerospores (Gigaspora margarita, Glomus manihots, Scutellospora heterogama and Glomus proliferum) were placed in ROC of purple basil where they had their growth observed until 100 days after inoculation. Also as part of the characterization of AMF species it was quantified the level of glomalin in the samples of multiplication and the results were subjected to analysis of variance and Scott-Knott test at 5% probability. In the second chapter it was investigated the effect of mycorrhizal association in ROC of purple basil, and in the third chapter the influence of different concentrations of humic acid and association with growth of Lunularia cruciata (area and length). The results were submitted to ANOVA and Tukey test at 5% probability. Scutellospora heterogama was the species with higher germination rates of glomerosporos, followed by Gigaspora margarita. The species of Glomus sporulated after formation of symbiosis. The amount of glomalin produced by different AMF was distinct, especially in total glomalin fraction. Different AMF species did not show difference in efficiency to promote development of Ocimum basilicum transformed roots. The growth of basil transformed roots in the MSR was extended from 15 days after inoculation with mycorrhizal fungi. The usage of humic acids in the culture medium in concentrations of 20 and 80 mg CL-1 enhanced growth of bryophyte L. cruciata, and its association with mycorrhizal fungi, as well as promoted the highest number of spores of Gl. proliferum. The association L. cruciata and AMF was characterized as mutualistic, since both had advantages in growth and sporulation. Gigaspora margarita and Glomus proliferum increased growth of Lunularia cruciata.
O objetivo do trabalho foi observar a germina??o e produ??o de glomalina e acompanhar desenvolvimento de esp?cies de fungos micorr?zicos arbusculares (FMA) do banco de germoplasma da Embrapa em ra?zes geneticamente modificadas de manjeric?o e em bri?fitas in vitro. Ainda, avaliar sua intera??o com os hospedeiros e a influ?ncia de meio de cultura enriquecido com ?cidos h?micos no crescimento do fungo e da bri?fita Lunularia cruciata. Para isso algumas esp?cies de FMAs foram selecionadas e tiveram seus glomerosporos extra?dos e submetidos ao processo de desinfesta??o superficial, colocados em meio Agar?gua e c?mara com temperatura controlada para germinar. Realizou-se teste de germina??o por 15 dias e os resultados foram submetidos a an?lise de vari?ncia e aplicado teste de Tukey ? 5% de probabilidade. Esp?cies com glomerosporos germinados (Gigaspora margarita, Glomus manihots, Scutellospora heterogama e Glomus proliferum) foram colocadas em ra?zes modificadas de manjeric?o roxo onde tiveram seu crescimento observado at? 100 dias ap?s a inocula??o. Ainda como parte da caracteriza??o de esp?cies de FMAs foi realizado a quantifica??o dos teores de glomalina nas amostras de multiplica??o sendo os resultados submetidos a an?lise de vari?ncia e aplicado teste de Scott-Knott ? 5% de probabilidade. No segundo cap?tulo foi verificado o efeito da associa??o FMAs em ra?zes modificadas de manjeric?o roxo e no terceiro cap?tulo a influ?ncia da associa??o ?cido h?mico em diferentes concentra??es, bri?fita Lunularia cruciata (?rea e comprimento) e FMAs. Os resultados foram submetidos ? an?lise de vari?ncia e teste de Tukey a 5% de probabilidade. Scutellospora heterogama foi a esp?cie com maiores taxas de germina??o de glomerosporos, seguida da Gigaspora margarita. As esp?cies de Glomus esporularam logo ap?s a forma??o da simbiose. A quantidade de glomalina produzida pelos diferentes FMAs foi distinta, em especial na fra??o glomalina total. As diferentes esp?cies de FMAs n?o apresentaram distin??o na efici?ncia de promover o desenvolvimento das ra?zes transformadas de Ocimum basilicum. O crescimento de ra?zes transformadas de manjeric?o em meio MSR foi ampliado a partir dos 15 dias ap?s a inocula??o de fungos micorr?zicos. O uso de ?cidos h?micos no meio de cultura em concentra??es de 20 e 80 mg C.L-1 incrementou o crescimento da bri?fita Lunularia cruciata e sua associa??o com fungos micorr?zicos arbusculares, assim como promoveram a maior esporula??o de Gl. proliferum. A associa??o Lunularia cruciata e FMAs foi caracterizada como mutualista j? que ambos apresentaram benef?cios em crescimento e esporula??o. Gigaspora margarita e Glomus proliferum promoveram maior crescimento de Lunularia cruciata.
Dlabaja, Tomáš. "Fermentace kuchyňských odpadů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228844.
Full textAlain, Emmanuelle. "Pyrolyse de mélanges brai de houille ou charbon cokéfiant - Fe Cl3 libre ou intercalé dans du graphite pulvérulent : élaboration et caractérisation de matériaux carbonés à propriétés adsorbantes sélectives." Nancy 1, 1997. http://www.theses.fr/1997NAN10032.
Full textPeters, Faustina Gertrudis Francisca. "De aanmerkelijkbelangregeling in internationaal perspectief de exitheffingen en de vestigingsplaatsficties in het licht van de nationale regeling, belastingverdragen, BRK en het EG-recht /." [Amsterdam] : Amsterdam : [Universiteit Amsterdam] ; Universiteit van Amsterdam [Host], 2007. http://dare.uva.nl/document/47976.
Full textVan dit proefschrift verschijnt een handelseditie in de serie Fiscale Monografieën (nr. 123), ISBN 9789013046526. Lit. opg.: p. 449-464. - Reg. - Met een samenvatting in het Nederlands en Engels.
Kristoffersen, Fredrik, and Rickard Wagman. "Kampen mellan globala hightechföretagen i framtiden : En framtidsstudie om konkurrensen mellan hightechföretag från Indien, Kina och Västvärlden." Thesis, Södertörn University College, School of Business Studies, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-2005.
Full textUndersökningen har karaktären av en framtidsstudie med syftet att undersöka konkurrenssituationen mellan hightechföretag från Indien och Kina med hightechföretag från Västvärlden. Detta för att göra prognoser kring framtiden. Även de faktorer som är viktiga för hightechföretags framgång i framtiden har undersökts. Undersökningsobjekten är HCL Technologies från Indien, ZTE från Kina, Ericsson från Sverige och Hewlett-Packard från USA.
Författarna har använt sig av en variant på Delphi-metoden, en enkätundersökning samt två intervjuer för att göra prognoserna. Författarna har även gjort ekonomiska jämförelser för att bedöma undersökningsobjektens ekonomiska tillstånd och förutsättningar för framtiden. Slutsatser är bland annat att faktorer viktiga för hightechföretags framgång i framtiden är tekniska funktioner, kostnadseffektivitet, kompetent personal och FoU samt FDI och IPR för asiatiska hightechföretag. Författarna drar även slutsatserna att hightechföretag från Indien och Kina kommer att kunna utgöra reella hot mot västerländska hightechföretag i framtiden och ha möjligheter att bli världsledande.
This paper has the character of a futurology study designed to examine the competitive situation between high-tech companies from India and China with high-tech companies from West to make predictions about the future. The factors that are important for high-tech companies' success in the future have been studied. The survey objects are HCL Technologies from India, ZTE from China, Ericsson from Sweden and Hewlett-Packard from the United States of America.
The authors have used a variant of the Delphi method, a survey and two interviews to make forecasts about the future. The authors have also made economical evaluations of the companies to compare their financial situation and conditions for the future. The conclusions include that factors that are important for high-tech companies' success in the future is, the technical features, cost efficiency, competent personnel and R&D. Also FDI and IPR for Asian high-tech companies. The authors also draws the conclusion that high-tech companies from India and China will pose a real threat to Western high-tech companies in the future and have the potential to become world leaders.
Nieves, Flores Jesica Jazmín. "Reciclaje mecánico y por radiación gamma de envases de Tetra Pak Brik Aseptic para la modificación de propiedades físicas y mecánicas y su reuso como sustituto de agregado fino en concreto." Tesis de Licenciatura, Universidad Autónoma del Estado de México, 2015. http://hdl.handle.net/20.500.11799/32693.
Full textBrei, Thomas Verfasser], Kathleen [Akademischer Betreuer] Herkommer, and Jürgen E. [Akademischer Betreuer] [Gschwend. "Vergleich der Lebensqualität bei radikal-chirurgisch behandelten Patienten der beiden häufigsten Tumorentitäten in der Urologie im Verlauf des ersten postoperativen Jahres / Thomas Brei. Gutachter: Kathleen Herkommer ; Jürgen E. Gschwend. Betreuer: Kathleen Herkommer." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1014330319/34.
Full textBenhamida, Mohammed-Bachir. "Étude des propriétés mécaniques et du compactage des agglomérés de carbone utilisés dans l'industrie de l'aluminium." Châtenay-Malabry, Ecole centrale de Paris, 1986. http://www.theses.fr/1986ECAP0208.
Full textIn this work, we study different paths of compaction. These pathes reduce the anisotropy of the agglomerates and give an optimized density to the material in the conditions compatible with subsequent industrial development. A better understanding of the laws governing the behaviour of this material under different pathes of compaction permitted us to contribute to the understanding of the phenomena related to the cracking of agglomerates of carbon that we observe in the current techniques of compaction. We studied the mechanical behaviour of the carbon agglomerate for different tar pitch contents under monotonie triaxial path. In this way we determined the parameters that define the shear resistance of the material. By comparing the different stress – strain paths we could select the pathes and the elements of the stress and strain tensors which are the most. The repeated cyclic triaxial is more advantageous tham the monotonic triaxial for the low values of consolidation stress. The alternated cyclic triaxial gives better densities than the repeated path. The expansive mold which is equivalent to the biaxial path gives encouraging results since the material is not optimized and the horizontal reaction is passive while in an industrial installation there might be an active reaction (jack)
KAVERI, SRINIVAS-VENKATESH. "Etude immunologique des recepteurs beta-adrenergiques." Paris 7, 1987. http://www.theses.fr/1987PA077217.
Full textWidmann, Thomas J. "The role of Dpp and Wingless signaling gradients in directing cell shape during Drosophila wing imaginal disc development." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-27123.
Full textMorphogenese in Tieren wird in hohem Maße von konzertierten Zellformveränderungen einzelner Zellen bewirkt. Es ist jedoch noch nicht hinreichend verstanden, wie Zellformveränderungen in sich entwickelnden Tieren reguliert und koordiniert werden. Hier zeigen wir, dass die zwei zueinander senkrecht stehenden Signalgradienten der Morphogene Dpp, eines TGF-β Homologs, und Wingless, eines Mitglieds der Wnt Familie, im sich entwickelnden Drosophila-Flügel Gewebe-Homöostase aufrechterhalten und Zellformveränderungen kontrollieren. Klone von Zellen, denen Dpp oder Wingless Signalaktivität fehlt, invaginieren von ihrer apikalen Seite her, verkürzen sich in apiko-basaler Richtung und extruieren im Folgenden auf der basalen Seite des Epithels, ohne es zu zerstören. Während der frühen Larvalentwicklung korreliert das Anschalten der Dpp und Wingless Signale mit der Zellformveränderung der Flügelscheibenzellen von kuboidal zu kolumnar. Gradienten in der apiko-basalen Länge von kolumnaren Zellen korrelieren während der späten Larvalentwicklung mit den Gradienten der Dpp und Wingless Signalaktivitäten. Zellen, die hohe Werte an Dpp und Wingless Signalen empfangen, sind am meisten elongiert und apikal konstringiert. Niedrige Werte von Dpp und Wingless Signalen korrelieren mit kürzerer und apikal weiterer Zellmorphologie. Dpp und Wingless Signale werden zellautonom gebraucht für die Aufrechterhaltung der elongierten Zellform von späten larvalen Flügelscheibenzellen. Die Überaktivierung dieser Signalwege führt zu vorzeitiger Zellverlängerung während der frühen Larvalentwicklung. Diese morphogenetischen Antworten auf Dpp und Wingless benötigen die Transkriptionsfaktor-Komplexe Mad beziehungsweise Tcf/β-catenin, was darauf hindeutet, dass sie durch Änderungen in der Genexpression vermittelt werden. Die morphogenetische Funktion von Wingless wird teilweise durch eines seiner Zielgene, Vestigial, vermittelt. Wingless Signale fördern die Anreicherung von E-cadherin an den Adherensverbindungen. Wir zeigen hier, dass E-cadherin gebraucht wird, um apiko-basale Zelllänge aufrechtzuerhalten. Dpp Signale kontrollieren die subzelluläre Verteilung der Aktivitäten der kleinen GTPase Rho1 und der regulatorischen leichten Kette von nicht-muskulärem Myosin II (MRLC). Eine Änderung in der Rho1 oder MRLC Aktivität hat weitreichende Auswirkungen auf die apiko-basale Zelllänge. Schließlich zeigen wir noch, dass eine Verringerung der Rho1 oder MRLC Aktivitäten die Zellverkürzung von Dpp-Signal kompromittierten Zellen rettet. Unsere Resultate identifizieren zellautonome Rollen für Dpp und Wingless Signale in der Förderung und Aufrechterhaltung der elongierten kolumnaren Zellform von Flügelimaginalscheibenzellen. Darüber hinaus suggerieren sie, dass Dpp und Wingless Signale die Zellform durch die Regulierung des Aktin-MyosinII/E-cadherin-Netzwerks kontrollieren
Boulanger, Amaury Renaud. "Pierre Quesnay (1895-1937) un expert financier, de la Normandie au monde." Thesis, Normandie, 2017. http://www.theses.fr/2017NORMR013.
Full textPierre Quesnay (1895-1935) is an important actor, although he’s not known for being part of the international financial life of the interwar period : « doctor of the money », first healing currencies in dissaray after the First World War, especially in Austria, then, at the SDN general secretariat. Acting in the shadows for the Poincaré’s stabilisation, as the general secretary of the Governor Moreau (between 1926 and 1928), brilliant Head of the Economic Analysis Department of the Banque of France, he is, starting from 1930, the first general manager of the BIS,originating from the Young plan, plan of which he was one of the main negociators. Edited from private familial archives which are totally unprecedented, including notebooks that Quesnay filled from 1912 to 1937, this work is an attempt of an intellectual biography of an international financial expert of the interwar period. By trying to understand what is his intellectual « tooling »(the evolution of his liberalism in view of the economical consequences of the First World War) as much as which are his networks (his proximity with Jean Monnet…), we come to the point, of the scales where he implements his intense activity, notably through his transnational dimension. On the other hand remains the central question, still actual, of the relation between the politician and the expert
Azari, Dorcheh Kamran. "Investigation of the materials and paste relationships to improve forming process and anode quality." Thesis, Université Laval, 2013. http://www.theses.ulaval.ca/2013/30365/30365.pdf.
Full textWidmann, Thomas J. "The role of Dpp and Wingless signaling gradients in directing cell shape during Drosophila wing imaginal disc development." Doctoral thesis, Technische Universität Dresden, 2009. https://tud.qucosa.de/id/qucosa%3A25235.
Full textMorphogenese in Tieren wird in hohem Maße von konzertierten Zellformveränderungen einzelner Zellen bewirkt. Es ist jedoch noch nicht hinreichend verstanden, wie Zellformveränderungen in sich entwickelnden Tieren reguliert und koordiniert werden. Hier zeigen wir, dass die zwei zueinander senkrecht stehenden Signalgradienten der Morphogene Dpp, eines TGF-β Homologs, und Wingless, eines Mitglieds der Wnt Familie, im sich entwickelnden Drosophila-Flügel Gewebe-Homöostase aufrechterhalten und Zellformveränderungen kontrollieren. Klone von Zellen, denen Dpp oder Wingless Signalaktivität fehlt, invaginieren von ihrer apikalen Seite her, verkürzen sich in apiko-basaler Richtung und extruieren im Folgenden auf der basalen Seite des Epithels, ohne es zu zerstören. Während der frühen Larvalentwicklung korreliert das Anschalten der Dpp und Wingless Signale mit der Zellformveränderung der Flügelscheibenzellen von kuboidal zu kolumnar. Gradienten in der apiko-basalen Länge von kolumnaren Zellen korrelieren während der späten Larvalentwicklung mit den Gradienten der Dpp und Wingless Signalaktivitäten. Zellen, die hohe Werte an Dpp und Wingless Signalen empfangen, sind am meisten elongiert und apikal konstringiert. Niedrige Werte von Dpp und Wingless Signalen korrelieren mit kürzerer und apikal weiterer Zellmorphologie. Dpp und Wingless Signale werden zellautonom gebraucht für die Aufrechterhaltung der elongierten Zellform von späten larvalen Flügelscheibenzellen. Die Überaktivierung dieser Signalwege führt zu vorzeitiger Zellverlängerung während der frühen Larvalentwicklung. Diese morphogenetischen Antworten auf Dpp und Wingless benötigen die Transkriptionsfaktor-Komplexe Mad beziehungsweise Tcf/β-catenin, was darauf hindeutet, dass sie durch Änderungen in der Genexpression vermittelt werden. Die morphogenetische Funktion von Wingless wird teilweise durch eines seiner Zielgene, Vestigial, vermittelt. Wingless Signale fördern die Anreicherung von E-cadherin an den Adherensverbindungen. Wir zeigen hier, dass E-cadherin gebraucht wird, um apiko-basale Zelllänge aufrechtzuerhalten. Dpp Signale kontrollieren die subzelluläre Verteilung der Aktivitäten der kleinen GTPase Rho1 und der regulatorischen leichten Kette von nicht-muskulärem Myosin II (MRLC). Eine Änderung in der Rho1 oder MRLC Aktivität hat weitreichende Auswirkungen auf die apiko-basale Zelllänge. Schließlich zeigen wir noch, dass eine Verringerung der Rho1 oder MRLC Aktivitäten die Zellverkürzung von Dpp-Signal kompromittierten Zellen rettet. Unsere Resultate identifizieren zellautonome Rollen für Dpp und Wingless Signale in der Förderung und Aufrechterhaltung der elongierten kolumnaren Zellform von Flügelimaginalscheibenzellen. Darüber hinaus suggerieren sie, dass Dpp und Wingless Signale die Zellform durch die Regulierung des Aktin-MyosinII/E-cadherin-Netzwerks kontrollieren.
Голов, С. В., and S. V. Golov. "Участие России в проекте «Один пояс, один путь» : магистерская диссертация." Master's thesis, б. и, 2021. http://hdl.handle.net/10995/100773.
Full textThe work analyses the development of economic relations between Russia and China in the context of the implementation of the Chinese Belt and Road Initiative (BRI). On the basis of a wide range of primary and secondary sources, the interaction, features and results of cooperation within the framework of BRI are determined. The official positions of the two countries are analyzed, as well as the assessment of interaction by the international expert community. The author comes to the conclusion that the RF and the PRC are not equal partners in the BRI project, however, their cooperation, in general, has positive dynamics.
Clausse, Vincent. "Contribution à l'étude de la carbonisation et de la graphitation de mélanges constitués d'un liant à base de brai de houille et de carbone granulaire : Influence de la formulation du mélange sur les propriétés des céramiques noires." Nancy 1, 2005. http://www.theses.fr/2005NAN10139.
Full textThis work was dedicated to the thermal treatment of heat exchanger tubes made of black ceramics, and to the study of their characterisation. Controlled amount of sulphur is added to coal tar pitch in order to increase the mechanical properties of the tubes. This element strongly modifies the binder evolution during the thermal treatment (drop of the weight lost). Moreover, for a sulphur weight fraction higher than 10%, the graphitation of the semi-coke is strongly limited by sulphur induced crosslinking of mesogen molecules. The investigation of the thermal treatment of the tubes has shown the major role of the final temperature on the properties, while no influence of the heating rate could be observed. The dependence of the orientation of the filler grains on the properties of the tube was evidenced
Gustafsson, Astrid, and Sara Lahti. "Byggnadsrelaterad ohälsa och psykiskt lidande." Thesis, Umeå universitet, Institutionen för psykologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-159511.
Full textBuilding related intolerance (BRI) is a condition with disturbing and unspecified symptoms attributed to certain buildings or parts of buildings. In previous research mental ill-health has been identified as a risk factor for BRI, but the studies investigating this are still few. The general aim of the current study was to investigate how burnout, depression, anxiety and stress, defined as psychological distress, is constituted among people with different levels of severity of BRI. Level of severity was defined in two different ways. As number of BRI-symptoms (distributed into three groups; mucosal, skin and general symptoms) and as intensity ratings of suffering from BRI-symptoms. The data was collected through a questionnaire answered by 106 participants including a control group. Participants were recruited from their occupational health care and their workplace. The participants worked at the university hospital of Umeå or the hospital in Skellefteå. The results showed that there were significantly more people that reached a cut-off for severe burnout (4.47), in the group with severe BRI. The group with severe BRI rated significantly higher than all other groups regarding burnout and significantly higher than a control group regarding depression. All parts of psychological distress had a significant positive correlation with measures of suffering from BRI-symptoms. The results indicates that psychological distress, burnout in particular and partially depression, is associated with increasing severity levels of BRI.
Åkesson, Malin, and Isak Prytz-Sund. "Järnvägstransporter från Asien : En utforskande studie om hur svenska företag kan använda Belt and Road Initiative." Thesis, Högskolan i Gävle, Industriell ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-36427.
Full textBurghart, Christoph [Verfasser], and Franz-Karl [Akademischer Betreuer] Ehrhard. "Leben und Werk des 17. Thronhalters der 'Bri-gung bka'-brgyud-Tradition Rin-chen phun-tshogs (1509-1557) unter besonderer Berücksichtigung seines Schatzzyklus Dam chos dgongs pa yang zab / Christoph Burghart ; Betreuer: Franz-Karl Ehrhard." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2017. http://d-nb.info/1141053721/34.
Full textBrei, Christina [Verfasser], Johann J. [Akademischer Betreuer] Hauner, Johann J. [Gutachter] Hauner, and Regina [Gutachter] Ensenauer. "Effect of changing the n-6/n-3 fatty acid ratio in the maternal diet during pregnancy and lactation on child body composition and neurodevelopment: long-term results from the INFAT study / Christina Brei ; Gutachter: Johann J. Hauner, Regina Ensenauer ; Betreuer: Johann J. Hauner." München : Universitätsbibliothek der TU München, 2017. http://d-nb.info/1149252316/34.
Full textRieger, Kathrin, Beata Walter, and Marie-Luise Rieger. "Auf dem Weg zur inklusiven Hochschule: Studie zur Situation von Studierenden und Beschäftigten mit Behinderungen im öffentlichen sächsischen Wissenschaftsbereich." Sächsisches Staatsministerium für Wissenschaft und Kunst, 2016. https://slub.qucosa.de/id/qucosa%3A71717.
Full textHachmann, Helena-Kristin. "Les contributions mutuelles de l'épistémologie sociale et de épistémologie individuelle ‘cognitiviste’ à la compréhension d’un changement conceptuel en économie financière. Une étude de cas : l’élaboration du concept de politique macroprudentielle au sein de la Banque des Règlements Internationaux (BRI) dans l’évaluation des risques sur les marchés financiers (1994-2006)." Thesis, Paris, EHESS, 2020. http://www.theses.fr/2020EHES0150.
Full textThis PhD thesis studies the relevance of social epistemology for the understanding of scientific change in economics. The question of a mutual contribution of social epistemology, of cognitivist approaches of individual epistemology and of philosophy of science is at the center . By using a case study we thus examine how the social framework of research helps to constitute or consolidate the cognitive dispositions of researchers. The case study focuses on the so-called "macroprudential" approach to financial regulation which was developed by a group of economists from the Bank for International Settlements (BIS) in the years prior to the financial crisis of 2007-8. Il will be shown by the example of contemporary neoclassical economics that the social framework - which includes institutions like scientific associations, universities, journals, international organizations, etc. - has great influence on the practices of researchers - and even more on the theoretical perspectives they adopt. This thesis is at the interface of various disciplines. In addition to individual and social epistemology and the general philosophy of science, it will address more specific questions of the philosophy of economics (pluralism of perspectives and methodologies in particular) and the history of the discipline of economics
Dekeyrel, Alixe. "Mise au point d’un procédé d’élaboration rapide de composites Carbone/Carbone haute densité." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14017/document.
Full textHigh density Carbon/Carbon composites are usually prepared by chemical vapor impregnation or by liquid pitch impregnation under high pressure (100 MPa). As these processes are complex and costly, an alternative moderate pressure (P < 10 MPa) impregnation process may be attractive, provided the densification yield is strongly improved. This doctoral work proposes an original process, including a pre-densification step, which leads to a significant increase of the C/C composite final density. Essential characteristics of pitches, various parameters influencing liquid pitch densification and processes for the pre-densification step are determined from bibliographical study. Consistent changes of the different physico-chemical characteristics are observed throughout the evolution of pitches to graphitic carbon, under moderate pressure. This experimental study on matrix precursors leads to the selection of a particular pitch as substitute of A240 pitch and to the determination of a specific pyrolysis procedure under moderate pressure. Influence of porous network in preforms on the pitch behaviour during densification is outlined by the comparison of densification yields in both an orthogonal 3D preform and a needled preform. Hybrid densification processes (with film-boiling process, powder impregnation, mesophasic pitch impregnation) are evaluated through the final density and the microstructure of elaborated composites. High density C/C composites, with an apparent density higher than 1.80 g.cm-3 and an open porosity lower than 15%, have been prepared from a pre-densified needled preform, after four densification cycles with liquid isotropic pitch, under moderate pressure. Thermal properties measurements on these C/C composites confirm the strong relationship between microstructure and thermal conductivity. It seems possible to tailor the macroscopic properties of C/C composites, thanks to hybrid carbonaceous matrices