Dissertationen zum Thema „Biomoleculaire“
Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an
Machen Sie sich mit Top-50 Dissertationen für die Forschung zum Thema "Biomoleculaire" bekannt.
Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.
Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.
Sehen Sie die Dissertationen für verschiedene Spezialgebieten durch und erstellen Sie Ihre Bibliographie auf korrekte Weise.
Corsaro, Daniele. „Infections par des micro-organismes intracellulaires : approche biomoleculaire du diagnostic et de l'epidemiologie (doctorat : genie biologique et medical)“. Nancy 1, 2000. http://www.theses.fr/2000NAN11321.
Der volle Inhalt der QuelleNavarrete, Belda Vanessa. „Domesticación animal y primeras prácticas ganaderas en el noreste peninsular (5500-4500 cal BC). Integración de los análisis bioquímicos en arqueozoología“. Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/461194.
Der volle Inhalt der QuelleIn the present doctoral PhD thesis the problematic of the dynamics of the process of animal domestication and the initial husbandry practices in the most western part of the Mediterranean area throughout the temporal interval that covers between 5,500-4,700 cal ANE is addressed. The main objective of this research is approached from the study of a significant sample of Neolithic sites located in the northeast of the Iberian Peninsula. The main explanatory models proposed about the origins of the Neolithic in the Iberian Peninsula have been evaluated with this doctoral thesis, focusing on the hypotheses and explanations formulated about the process of animal domestication and initial livestock practices. Based on the new data provided by the study of a significant sample of Neolithic sites in the northeastern peninsular area, the existing information has been analyzed from a taphonomical perspective, pointing out the importance of considering not only the composition of the faunal remains, but also its degree of historical representativeness. The contextualisation of the new data obtained at peninsular and European level, with a special emphasis on the Mediterranean area, has provided significant documents of the implications of adoption and herding of the four main domestic species. The analyzes carried out have shown polyvalent exploitation of the different types of animal production, full integration of the agricultural and livestock cycles, practice of intensive and extensive livestock strategies and existence of permanent livestock farms in the high areas of the Pyrenees during the Early Neolithic. All these documents force us to rethink some of the assumptions that have guided the debate on the origins of agriculture and pastoralism. At a methodological level, it is to be note as a novelty that the method implemented integrated several analytical processes developed within the framework of archaeological, archaeo-taphonomical, archaeozoological and biomolecular disciplines. This approach has allowed to document, characterize and evaluate the work processes linked to the exploitation and management of domestic animals during the Early Neolithic period. The integration of stable isotope analysis has involved contributing in a significant manner to the study of livestock management, allowing to characterize the strategies implemented in the feeding of the first domestic animals. Results show the rapid adaptation of domestic animals to peninsular environments. Indeed, the practice of a fully consolidated livestock strategy characterized by the possibility of modeling the demographic structure of the herds, the productivity of the species and the food adaptation capacities of the animals depending on physiological and ethological characteristics of each species, has been documented. Therefore, results allow to interpret that the adoption of livestock techniques was a non-linear, non-homogenous process at the beginning of the Neolithic in the Iberian Peninsula. The documentation of regional modalities highlights the importance and magnitude of the study of animal domestication and initial livestock practices in the framework of the neolithization process in this geographical area.
Giro, Vocel Alexia. „Prise en charge des cancers du sein : qualité de vie et caractérisations biomoléculaires de ces cancers“. Electronic Thesis or Diss., Université Clermont Auvergne (2021-...), 2024. http://www.theses.fr/2024UCFA0096.
Der volle Inhalt der QuelleBreast cancer is the most common cancer among women in France, accounting for 33% of cases, followed by colorectal and lung cancers. It is also the deadliest, responsible for 18% of female cancer deaths.My doctoral research aims to improve the management of patients with breast cancer. To achieve this, it is crucial to consider both their quality of life and the biomolecular characteristics of their tumors. I have structured my thesis work around these two themes.Regarding the quality of life of patients, I am responsible for the final analysis and publication of the MENOCOR study, which examines the impact of chemotherapy-induced menopause (CIM) in young women of childbearing age. In this manuscript, I present the initial results of the study (the impact of CIM on the functional score of the QLQ-C30 and hormone levels). At the end of the study, the patients are divided into two groups based on their menopausal status: menopausal and non-menopausal. The results indicate a trend suggesting that the evolution of the score over time differs between the two groups: menopausal patients experience a decrease in quality of life over time, unlike non-menopausal patients (p = 0.058). The two groups differ in terms of age (p < 0.001) and estrogen receptors (p = 0.03). The Anti-Müllerian Hormone (AMH), which shows a significant difference between the two groups at baseline (p < 0.001), proves to be a useful marker in defining the menopausal status of patients. The final results will provide data on menopause (incidence, risk factors) and its impact on quality of life, enabling the adaptation of early management for young and menopausal patients in the future.I also took part of the AR-GBS project conception, which aims to develop an augmented reality technique for the preoperative localization of subclinical breast cancer lesions. The augmented reality technique developed as a result of this study will allow patients to avoid current invasive localization techniques, thereby improving their surgical management and, consequently, their quality of life.The biomolecular characterization of tumors is investigated in the PERCEPTION study, which explores the correlation between blood components and tumor infiltration lymphocytes in women with triple-negative breast cancer. I was responsible for managing the study, conducting the interim analysis, and its publication. The results did not demonstrate a correlation between the Neutrophil-to-Lymphocyte Ratio (NLR) and the percentage of tumor-infiltrating lymphocytes (TILs) (rs = -0.19, 95% CI [-0.49; 0.16], p = 0.3). Contrary to expectations based on existing literature, the results show a trend toward a positive correlation between the NLR and the CD8/FoxP3 TIL ratio (rs = 0.36, 95% CI [0.03; 0.64], p = 0.043). Due to the small sample size and lack of statistical power, the absence of an observed difference should be interpreted with caution. Therefore, it is necessary to await the final analysis results to draw conclusions. This interim analysis also identified areas for optimization in the final analysis, such as the method used to determine the number of TILs in each subpopulation, which is not sufficiently representative of the actual infiltration.These works thus offer promising perspectives for improving the management and quality of life of breast cancer patients. Continuing these studies will not only confirm the observed trends but also refine therapeutic strategies tailored to the specific needs of patients
Portugal, Rodrigo Villares. „Estudos de complexos macromoleculares por crio-microscopia eletrônica e técnicas biofísicas“. Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-14112014-104525/.
Der volle Inhalt der QuelleThis work describes characterization of two biomolecular complexes: hRXR deltaAB and a hemocyanin from Acanthoscurria gomesiana using structural and biophysical techniques. Application of cryo-electron microscopy to studies of a hemocyanin from Acanthoscurria gomesiana resulted in its structural model to 14Å resolution, which was calculated by Fourier Shell Correlation with cut-off of 1/2 bit. At this resolution limit one can observe structural details of the complex which are compatible with other hemocyanin models. With respect to hRXR deltaAB, we showed using analytic size exclusion chromatography, SDS PAGE and SAXS, that the protein is dimeric in solution even at the absence of its ligand, 9-cis-RA. hRXR deltaAB binding to the responsive elements of DNA, DR1, DR4, F2 and PAL was investigated and the binding constants to these responsive elements have been determined using fluorescence anisotropy technique. Our results show higher affinity of the receptor to DR1 and DR4 and indicate entropic mechanism of DNA binding
Cunha, João Victor de Souza. „Aplicação de Monte Carlo para a geração de ensembles e análise termodinâmica da interação biomolecular“. Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-25112016-143220/.
Der volle Inhalt der QuelleThe molecular interactions, especially the ones with a non-covalent nature, are key processes in general aspects of cellular and molecular biology, including cellular communication and velocity and specificity of enzymatic reactions. So, there is a strong need for studies and development of methods for the calculation of the affinity on interaction processes, since these have a wide range of applications like rational drug design. The free energy of binding is the most important measure among the affinity measurements. It can be calculated by quick computational means, but lacking on strong theoretical basis or by complex calculations using molecular dynamics, where one can compute accurate results but at the price of an increased computer power. The aim of this project is to evaluate a computationally inexpensive model which can improve the results from molecular docking simulations. For this end, the Monte Carlo method is implemented to sample different ligand configurations inside the macromolecular binding site. The evaluation of this methodology showed that is possible to calculate entropy and enthalpy, along analyzing the interactive capacity between receptor-ligands complexes in a satisfactory way for the bacteriophage T4.
Coltro, Wendell Karlos Tomazelli. „Detecção condutométrica sem contato: uma nova ferramenta para monitoramento de interações biomoleculares em microssistemas analíticos“. Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/75/75132/tde-21082009-100220/.
Der volle Inhalt der QuelleThe study reported in this thesis shows the application of a capacitively coupled contactless conductivity detection (C4D) for monitoring biomolecular interactions on analytical microsystems. Initially, the analytical performance of the microsystems fabricated in glass, poly(dimethylsiloxane) (PDMS) and polyester-toner (PT) was investigated in order to choose the best material (in terms of fabrication facilities, costs and repeatability) for the biomolecular assays. Among all substrate materials studied, devices fabricated in PT showed suitability for quick experiments, in which the analytical repeatability is not the most important parameter. The devices fabricated in PDMS and sealed against a glass plate presented the best results in terms of repeatability and the analytical performance was similar to that one of glass devices. For this reason, PDMS/glass devices were chosen for showing the goals of this thesis. On the other hand, PT devices were employed to study the geometrical design of the C4D system. The instrumentation for monitoring binding assays was basically composed of two C4D systems, a software written in LabVIEW and a solution pumping system. In order to find the suitable detection cell configuration for this dual-C4D system, designs containing three, four and five electrodes were evaluated on PT devices. The optimal design was composed of three electrodes symmetrically spaced. In this configuration, one electrode is used for applying an excitation sinusoidal wave and the other two for picking up the resulting signal. The dimensions of the electrodes (width and gap) were optimized by chemometric tools. The avidin-biotin complex was used as a binding model for showing the feasibility of the proposed system. For the biomolecular microsystems, electrodes were fabricated on glass surface using photolithographic, sputtering and lift-off processes. Detection electrodes were insulated with a 50-nm silicon oxide layer deposited by plasmaenhanced chemical vapor deposition. The SiO2 layer was functionalized by immersing the cleaned surface in a 3-aminopropyltriethoxy-silane solution in ethanol for 3 h. For biotinylation of the amino-silane layer, 10 ?L of photobiotin dissolved in deionized water (0.1 mg/mL) was dropped on the modified glass surface and exposed to a 365 nm UV radiation at intensity of 10 mW/cm2 for 15 min. Detection was carried out by passing a sinusoidal excitation signal from the function signal generator to the first electrode and picking up the resulting signal at the two receiver electrodes. To reduce electrical noise pickup, all measurements were carried out in a Faraday cage. The data acquisition was obtained in a software written in LabVIEW and the conductivity sensorgrams were recorded in real-time. The microfluidic network was fabricated in PDMS by soft lithography and irreversibly sealed against the electrodes plate. Solutions were handled into microfluidic channels using a peristaltic pump or two syringe pumps. Buffer and avidin-containing solution was injected into the microchannels and conductivity changes were monitored over time. Avidin solutions were allowed to remain in contact with the surface until a stable conductivity had reached equilibrium. Avidin-free buffer solutions were then injected to rinse off non-specifically bound analytes. Two solenoid valves were used to allow an automatic dispensing of the sample/buffer solution into microchannels. The limit of detection found for avidin-biotin system was 75 nmol L-1.
Hansel, Fabricio Augusto. „Arqueologia biomolecular“. Florianópolis, SC, 2004. http://repositorio.ufsc.br/xmlui/handle/123456789/87960.
Der volle Inhalt der QuelleMade available in DSpace on 2012-10-22T04:09:00Z (GMT). No. of bitstreams: 0
O presente trabalho analisou materiais provenientes de sítios arqueológicos da população pré-colonial Jê (ca. 1000 AD), localizados na faixa costeira de Santa Catarina. O objetivo principal do trabalho foi identificar a origem dos resíduos orgânicos preservados nos fragmentos de cerâmica escavados dos sítios pré-coloniais Jê, através das seguintes técnicas hifenadas: GC-MS, HT GC-MS e GC-C-MS IR. Foram analisados 118 fragmentos de cerâmica, sendo que 53 % dos fragmentos continham lipídios. A maioria classificada como gordura degradada de origem animal, sendo, embora em menor número, detectado resíduos de origem vegetal. A interpretação destes resíduos de origem animal foi realizado a partir da comparação com amostras de referencia arqueológicas (valores de d13C para colágenos de ossos) e modernas (distribuição dos ácidos graxos saturados em gordura de capivara, mamíferos aquáticos, bivalves e peixes,), pela identificação de novos biomarcadores (ácidos 4,8,12-trimetil-tridecanóico, pristânico, fitânico, C16, C18 e C20 w-(o-alquil-fenil)alcanóicos e di-hidroxiácidos) e através dos valores de d13C dos ácidos graxos Ac14:0, Ac16:0 e Ac18:0. Através destes foi possível comprovar que grande parte dos lipídios tinha sua origem em gorduras marinhas. Já a identificação dos resíduos de origem vegetal foi evidenciada através de triterpenos e ésteres de ceras epicuticulares.
Defaus, Fornaguera Sira. „Glycoprobes for capture and identification of lectins from biological sources“. Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/277290.
Der volle Inhalt der QuelleLa glicosilació, el procés enzimàtic que uneix sacàrids per produir glicans que s'adhereixen a proteïnes, lípids o altres molècules biològiques, és una modificació co-traduccional i post-traduccional present a la pràctica totalitat de components cel•lulars, on trobem glicoproteïnes, glicolípids i altres glicoderivats. Pel que fa específicament a les proteïnes, s’estima que més d’un 80% estan glicosilades i que aquests glicans són fonamentals en processos biològics com la senyalització cel•lular, el cicle infecciós de certs patògens, les respostes inflamatòria i immune, la fertilització, etc. En els últims anys s’ha avançat substancialment en el coneixement bàsic de la funció de determinats epítops o cadenes glicosídiques concretes. No obstant, es desconeixen les funcions de moltes altres estructures glicosídiques. D’altra banda, també existeix un cert desconeixement sobre les molècules que reconeixen els carbohidrats, les lectines “lectores del codi glicòmic”. Aquestes proteïnes es caracteritzen per reconèixer i unir-se de forma reversible i específica a certs monosacàrids o epítops oligosacàrids donant lloc a interaccions similars a les reaccions antigen-anticòs o enzim-substrat. El paper de les lectines en processos com l'aglutinació i la definició de grups sanguinis, la inflamació (selectines), la mielinització del teixit nerviós, la progressió tumoral, etc., demostra la ubiqüitat i diversitat d'activitats en què es veuen implicades aquestes proteïnes. Per això, disposar d'una eina ràpida i fiable per al seu aïllament i identificació, previ a l'estudi de les seves interaccions amb polisacàrids, constitueix un objectiu de màxim interès en l'actual investigació biomèdica. En la present Tesi Doctoral, es descriuen dues aproximacions complementàries mitjançant les quals es poden caracteritzar les interaccions lectina-carbohidrat amb gran sensibilitat, poca mostra i sense la necessitat de cap marcatge. En la tècnica de ressonància de plasmó superficial (SPR), el sucre és immobilitzat sobre una superfície a través d'un mòdul peptídic, la qual cosa permet (1) capturar la lectina, (2) caracteritzar la seva interacció mitjançant paràmetres cinètics i termodinàmics i (3) identificar posteriorment la proteïna mitjançant espectrometria de masses. Complementàriament, la tècnica CREDEX-MS, basada en l'excisió proteolítica del complex proteïna-sucre i posterior anàlisi per espectrometria de masses, ens permet identificar els pèptids que formen part del domini d'unió al sucre.
Haag, Nicole. „Probing biomolecular fragmentation“. Doctoral thesis, Stockholms universitet, Fysikum, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-54524.
Der volle Inhalt der QuelleBredenberg, Johan. „Modelling biomolecular interactions /“. Stockholm, 2003. http://diss.kib.ki.se/2003/91-7349-571-9.
Der volle Inhalt der QuelleBelshaw, Louise. „Ultrafast biomolecular dynamics“. Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.602437.
Der volle Inhalt der QuelleHeberle, Henry. „Uma abordagem visual para análise comparativa de redes biomoleculares com apoio de diagramas de Venn“. Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-19032015-115427/.
Der volle Inhalt der QuelleBiological systems can be represented by networks that store not only connectivity information, but also node feature information. In the context of molecular biology, these nodes may represent proteins, metabolites, and other types of molecules. Each molecule has features annotated and stored in databases such as Gene Ontology. A visual comparison of networks requires tools that allow the user to identify differences and similarities between nodes attributes as well as known interactions between nodes (connections). In this dissertation, we sought to develop a technique that would facilitate the comparison of these biological networks, striving to maintain in the process the visualization of the network connectivities. As a result, we have developed the VisPipeline-MultiNetwork tool, which allows comparison of up to six networks, using sets of operations on networks and on their attributes. Unlike most known tools for visualizing biological networks, VisPipeline-MultiNetwork allows the creation of networks whose attributes are derived from the original networks through operations of union, intersection and unique values. A visual comparison of the networks is achieved by visualizing the outcome of such joint operations through a all-in-one comparison method. The comparison of nodes attributes is performed using Venn diagrams. To assist this type of comparison, the InteractiVenn technique was developed, in which the user can interact with a Venn diagram, performing union operations between sets and their corresponding diagrams. This diagram union feature differs from other tools available for creating Venn diagrams. With these tools, users manage to compare networks from different perspectives. To exemplify the use of VisPipeline-MultiNetwork, two case studies were carried out in the biomolecular context. Additionally, a web tool for comparing lists of strings by means of Venn diagrams was made available. It also implements the InteractiVenn technique and its site has been named InteractiVenn.
Brampton, Christopher. „Forces in biomolecular systems“. Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429077.
Der volle Inhalt der QuelleStone, Martin Jeremy. „Studies in biomolecular recognition“. Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359834.
Der volle Inhalt der QuelleKillick, Thomas Nathaniel Roper. „Approaches to biomolecular folding“. Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624261.
Der volle Inhalt der QuelleRosa, João Pedro Maurício. „Nanobiophotonics for biomolecular diagnostics“. Doctoral thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10157.
Der volle Inhalt der QuelleThe main objective of this thesis was to study the fluorescence modulation induced by gold nanoparticles (AuNPs) on fluorophores nearby and/or bonded to the AuNPs’ surface through nuclei acid molecules. The understanding of the effect of distance in the spectral properties of fluorophores would allow the development of a biosensor for the characterisation of DNA and/or RNA sequences. To study the photophysics involved in the fluorescence modulation by AuNPs it was necessary to develop an experimental approach that removed the effect of the optical interference caused by the presence of AuNPs. By comparing the samples with controlled reference solutions it was possible determine the fluorescence quantum yield and fluorescence decay time of the fluorophores in the vicinity of AuNPs. During the characterisation several non-photophysical phenomena involving nanoparticles were unveiled, such as a local pH effect, coupling of the plasmonic oscillator with transition moments of the fluorophore or AuNP-induced fluorophore aggregation. The developed experimental method was applied to the study of the effect of distance in the modulation of fluorescence caused by AuNPs. Using DNA molecules as spacer, the photophysical properties of fluorophores at different distances of the surface of the AuNPs showed a distance-dependence fitting into a 1/r6 dependence. The knowledge gathered on AuNP-DNA-fluorophore systems allowed for a successful semi-quantitative detection of RNA in solution. The same system showed to be useful for the simultaneous quantification and control RNA synthesis in vitro. In situ detection and gene silencing was demonstrated by targeting EGFP mRNA as proof-of-concept. A similar approach was successfully achieved in siRNA and endogenous miRNA targets. The application of this system to micro-deletions and RNA isoforms analysis was also demonstrated in synthetic targets.
Fundação para a Ciência e Tecnologia - (SFRH/BD/43320/2008)
Shah, Rushina(Rushina Jaidip). „Input-output biomolecular systems“. Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/129016.
Der volle Inhalt der QuelleCataloged from student-submitted PDF of thesis.
Includes bibliographical references (pages 194-206).
The ability of cells to sense and respond to their environment is encoded in biomolecular reaction networks, in which information travels through processes such as production, modification, and removal of biomolecules. These reaction networks can be modeled as input-output systems, where the input, state and output variables are concentrations of the biomolecules involved in these reactions. Tools from non-linear dynamics and control theory can be leveraged to analyze and control these systems. In this thesis, we study two key biomolecular networks. In part 1 of this thesis, we study the input-output behavior of signaling systems, which are responsible for the transmission of information both from outside and from within the cells, and are ubiquitous, playing a role in cell cycle progression, survival, growth, differentiation and apoptosis. A signaling pathway transmits information from an upstream system to downstream systems, ideally in a unidirectional fashion.
A key obstacle to unidirectional transmission is retroactivity, the additional reaction flux that affects a system once its species interact with those of downstream systems. In this work, we identify signaling architectures that can overcome retroactivity, allowing unidirectional transmission of signals. These findings can be used to decompose natural signal transduction networks into modules, and at the same time, they establish a library of devices that can be used in synthetic biology to facilitate modular circuit design. In part 2 of this thesis, we design inputs to trigger a transition of cell-fate from one cell type to another. The process of cell-fate decision-making is often modeled by means of multistable gene regulatory networks, where different stable steady states represent distinct cell phenotypes. In this thesis, we provide theoretical results that guide the selection of inputs that trigger a transition, i.e., reprogram the network, to a desired stable steady state.
Our results depend uniquely on the structure of the network and are independent of specific parameter values. We demonstrate these results by means of several examples, including models of the extended network controlling stem-cell maintenance and differentiation.
by Rushina Shah.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Mechanical Engineering
Codó, Tarraubella Laia. „Computational Infrastructures for biomolecular research“. Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/668536.
Der volle Inhalt der QuelleGöransson, Jenny. „Readout Strategies for Biomolecular Analyses“. Doctoral thesis, Uppsala universitet, Institutionen för genetik och patologi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9343.
Der volle Inhalt der QuelleXin, W. (Weidong). „Continuum electrostatics of biomolecular systems“. Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514287602.
Der volle Inhalt der QuelleAveyard, Jenny Louise. „Gold Nanoparticles For Biomolecular Assays“. Thesis, University of Liverpool, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490626.
Der volle Inhalt der QuelleCerutti, David. „Models for solvated biomolecular structures“. Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3259620.
Der volle Inhalt der QuelleTitle from first page of PDF file (viewed June 21, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 142-157).
Karlsson, Linda. „Biomolecular interactions with porous silicon /“. Linköping : Univ, 2003. http://www.bibl.liu.se/liupubl/disp/disp2003/tek804s.pdf.
Der volle Inhalt der QuelleJanosi, Lorant. „Multiscale modeling of biomolecular systems“. Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4801.
Der volle Inhalt der QuelleThe 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 on February 14, 2008) Vita. Includes bibliographical references.
Montague, Matthew. „Optically addressable nanonscale biomolecular arrays“. Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499977.
Der volle Inhalt der QuellePalma, Pedro Alberto Enriquez. „Dynamics of photoinitiated biomolecular reactions“. Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335923.
Der volle Inhalt der QuelleSeddon, Annela Mary. „Biomolecular templating of inorganic materials“. Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268710.
Der volle Inhalt der QuelleZhang, Yingbo. „Microfluidic methods for biomolecular analysis“. Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274931.
Der volle Inhalt der QuelleGöransson, Jenny. „Readout Strategies for Biomolecular Analyses /“. Uppsala : Acta Universitatis Upsaliensis, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9343.
Der volle Inhalt der QuelleWhitford, Paul Charles. „Energy landscapes of biomolecular function“. Diss., [La Jolla] : University of California, San Diego, 2009. http://wwwlib.umi.com/cr/ucsd/fullcit?p3359502.
Der volle Inhalt der QuelleTitle from first page of PDF file (viewed June 16, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
Lee, Yongkuk. „Biomolecular shuttles under dielectrophoretic forces“. Morgantown, W. Va. : [West Virginia University Libraries], 2008. http://hdl.handle.net/10450/5742.
Der volle Inhalt der QuelleTitle from document title page. Document formatted into pages; contains ix, 115 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 103-105).
Desai, Amruta. „Design support for biomolecular systems“. Cincinnati, Ohio : University of Cincinnati, 2010. http://rave.ohiolink.edu/etdc/view.cgi?acc_num=ucin1265986863.
Der volle Inhalt der QuelleAdvisor: Carla Purdy. Title from electronic thesis title page (viewed Apr. 19, 2010). Includes abstract. Keywords: Biological pathways; weighted gate; BMDL; pyrimidine. Includes bibliographical references.
Shenton, Wayne. „Biomolecular approaches to nanophase chemistry“. Thesis, University of Bath, 1998. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300767.
Der volle Inhalt der QuelleDey, Abhishek. „Modeling and identification of biomolecular systems“. Thesis, IIT Delhi, 2019. http://eprint.iitd.ac.in:80//handle/2074/8121.
Der volle Inhalt der QuelleVillanueva, Torrijo Luis Guillermo. „Development of cantilevers for biomolecular measurements“. Doctoral thesis, Universitat Autònoma de Barcelona, 2006. http://hdl.handle.net/10803/5354.
Der volle Inhalt der QuellePer altra banda, amb l'objectiu de realitzar mesures de conducció en un ambient líquid, es van fabricar unes bigues conductores però aïllades. La capa conductora en aquestes bigues (una capa d'or) ha d'estar aïllada del exterior per una capa dielèctrica (nitrur de silici) per disminuir d'aquesta manera les capacitats paràsites. Al extrem lliure, s'ha de situar una punta de polisilici afilada per poder escanejar superfícies. La punta ha d'estar coberta per or i, sobre l'or, tenir nitrur a tot arreu menys al vèrtex. Per obtenir aquests dispositius, es va optimitzar el gravat de puntes de polisilici obtenint finalment puntes amb un diàmetre de vèrtex més petit que 20 nm (fent servir un atac sec en un equip DRIE seguit d'unes oxidacions per esmolar). A més, es va realitzar un estudi dels esforços interns per intentar obtenir bigues planes. A l'última part del treball, es va dur a terme la fabricació de sondes per AFM (bigues amb una punta esmolada al seu extrem lliure). Aquests dispositius es fan servir moltíssim actualment per caracteritzar superfícies i realitzar experiments que requereixen molta precisió i/o resolució. L'objectiu fonamental d'aquesta feina era el possibilitar la fabricació de sondes per AFM al nostre centre de manera que els dissenys poguessin ser triats pels investigadors d'acord amb les necessitats de cadascú d'ells. Per això, es van considerar diferents materials i processos de fabricació de puntes. La millor opció va ser el gravat sec amb un equip DRIE d'unes puntes "tipus coet" amb una part superior afilada, situada al cim d'una columna cilíndrica. Els processos de gravat es van optimitzar per així obtenir una alta uniformitat arreu de l'oblia, així com uns perfils de puntes apropiats per poder fer-les servir en un AFM. A continuació, es van fabricar sondes completes. Per comprovar com de bona era la tecnologia de fabricació que havíem dissenyat, es van fabricar dispositius de dos tipus diferents: per fer-les servir en mode contacte (constant elàstica baixa) i per fer-les servir en mode dinàmic (constant elàstica alta). Aquests dispositius es van utilitzar per escanejar unes mostres d'alumini i es van comparar amb els resultats obtinguts amb sondes comercials, obtenint resultats similars en ambdós casos.
Finalment, es van fabricar sondes per a aplicacions específiques: sondes amb puntes amb la part superior plana per l'estudi de la elasticitat de polímers i materials biològics (molt baix mòdul de Young) i sondes amb bigues d'una geometria especial per a que les freqüències de ressonància del mode fonamental i del primer harmònic transversal estiguessin més juntes, per així millorar la detecció del potencial de superfície en la tècnica KPFM. Amb la fabricació d'aquestes puntes, es va demostrar que el disposar d'una tecnologia que permetés la fabricació de sondes pot ser molt útil per al desenvolupament de noves aplicacions de l'AFM.
Este trabajo queda dividido en tres apartados, todos ellos relacionados con el diseño y fabricación de vigas en voladizo de tamaño micrométrico (micro-cantilevers en inglés) para diferentes aplicaciones. En el segundo capítulo se describe el trabajo realizado con vigas piezorresistivas. El objetivo fundamental de esa parte del trabajo consistía en la consecución de un elemento sensor capaz de detectar fuerzas en el rango de 10 a 100 pN. Para ello, en primer lugar, se realizó un detallado análisis teórico del comportamiento de estas estructuras mecánicas cuando se les aplica una fuerza en su extremo libre. Se estudió asimismo el ruido (tanto eléctrico como mecánico) presente en ellas. De esta manera se establecieron unos criterios para la maximización de la sensibilidad y la resolución del sensor. Los resultados analíticos se compararon con los resultados de simulaciones por elementos finitos, obteniendo divergencias muy bajas, lo cual fue interpretado como una validación de los primeros. Se diseñaron y fabricaron unas vigas piezorresistivas de polisilicio con forma de U. Las dimensiones y demás parámetros se fijaron mediante los criterios obtenidos para la optimización del comportamiento de las vigas. Las vigas se fabricaron tanto en la Sala Blanca del CNM como usando una tecnología CMOS comercial (0.8 m de AustriaMicroSystems). Los procesos de fabricación dentro de la Sala Blanca del CNM se optimizaron para aumentar el rendimiento de las obleas. De esta forma, finalmente, se alcanzó un rendimiento cercano al 95% (aproximadamente 95 de cada 100 dispositivos se obtuvieron correctamente). Se optimizó asimismo el post proceso de los chips CMOS en el CNM para obtener un alto rendimiento. En este caso, se consideró la supervivencia de las estructuras mecánicas así como de la circuitería CMOS integrada junto con las vigas. Esta circuitería, diseñada en el ETH de Zürich, consistía en un filtro y un amplificador para mejorar la resolución del sensor. Una vez fabricados, los dispositivos se caracterizaron. La parte central de esta caracterización englobó dos aspectos: la medida del ruido de la señal de salida del circuito y la determinación de la sensibilidad de los dispositivos. Teniendo en cuenta ambos resultados se calculó la resolución de nuestros sensores. Los mejores resultados obtenidos fueron de unos 30 nN para las vigas fabricadas en el CNM y de unos 30 pN para las provenientes de la tecnología CMOS. Esta diferencia de tres órdenes de magnitud en la resolución es debida a la circuitería adjunta a los dispositivos transductores (vigas) y nos permitiría medir fuerzas del orden de magnitud requerido.
Por otro lado, con el objetivo de realizar medidas de conducción en medio líquido, se fabricaron unas vigas conductoras pero aisladas. La capa conductora en dichas vigas (capa de oro) ha de estar aislada del exterior por medio de una capa dieléctrica (nitruro de silicio) para así disminuir las capacidades parásitas. En el extremo libre, se ha de situar una punta de polisilicio afilada para poder escanear superficies. Dicha punta ha de estar cubierta por oro y, sobre el oro, tener nitruro en todas partes salvo en el vértice. Para obtener estos dispositivos, se optimizó el grabado de puntas de polisilicio, obteniendo finalmente puntas con un diámetro de vértice menor que 20 nm (usando un ataque en un equipo DRIE seguido por unas oxidaciones para afilar). Además, se realizó un estudio de los esfuerzos internos para intentar obtener vigas lo más planas posible. En la última parte del trabajo, se llevó a cabo la fabricación de sondas para AFM (vigas con una punta afilada en su extremo libre). Estos dispositivos son ampliamente usados en la actualidad para caracterizar muestras y para realizar experimentos en los que se requiere una alta precisión y/o resolución. El objetivo fundamental de este trabajo era el posibilitar la fabricación de sondas para AFM en nuestro centro de manera que los diseños pudieran ser elegidos a voluntad y acordes con las necesidades de cada
investigador. Para ello se consideraron diferentes materiales y procesos de fabricación de puntas. La mejor opción fue la definición por medio de un equipo DRIE de puntas "tipo cohete" con una parte superior afilada, situada sobre una columna cilíndrica. Los procesos de grabado se optimizaron para así obtener una alta uniformidad a lo largo y ancho de la oblea así como unos perfiles de puntas apropiados para poder ser usadas después en un AFM. A continuación, se fabricaron sondas completas. Para comprobar cómo de buena era la tecnología de fabricación que habíamos diseñado, se fabricaron puntas de dos tipos diferentes: para ser usadas en modo contacto (constante elástica baja) y para ser usadas en modo dinámico (constante elástica alta). Dichos dispositivos se usaron para escanear algunas muestras y se compararon con algunos disponibles comercialmente, obteniendo resultados similares tanto para modo contacto como para dinámico.
Finalmente, se fabricaron sondas para aplicaciones específicas: sondas con puntas con la parte superior plana para el estudio de la elasticidad de polímeros y materiales biológicos (con bajo módulo de Young) y sondas con vigas de una geometría especial para que las frecuencias de resonancia del modo fundamental y del primer harmónico transversal estuvieran más juntas, para así mejorar la detección del potencial de superficie en la técnica KPFM. Con la fabricación de estas puntas, se demostró que el disponer de una tecnología que permita la consecución de puntas puede ser muy útil para el desarrollo de nuevas aplicaciones del AFM.
The main objective of this thesis has been the research in the design and fabrication of micro-cantilevers that are one of the most used mechanical transducers because of their versatility. The use of polysilicon piezoresistive cantilevers has been explored in order to detect binding forces between biomolecules. Force resolution under 100 pN was required. A detailed analytical study has been performed in order to calculate sensitivity and resolution when applying a force at their free end. The results obtained with this analysis have been confirmed by the use of FEM simulations and hence used to determine the optimum design of the piezoresistive sensor. U-shaped polysilicon cantilevers have been fabricated at CNM clean room facilities using a novel and dedicated technology. Designs were made following the criteria imposed by the previously obtained analytical results. The high force resolution required implied the fabrication of some cantilevers among the softest piezoresistive cantilevers reported up to date (elastic constants down to 0.5 mN/m). With the final optimized fabrication process, a yield of 95% has been achieved. Using a commercial CMOS technology (0.8 m from AustriaMicroSystems), polysilicon piezoresistive cantilevers have been designed and fabricated following again the criteria imposed by the theoretical analysis and, in this case, also design rules from the CMOS technology. Cantilevers were integrated with a filtering and amplifying circuitry to reduce noise. The softest piezoresistive CMOS integrated cantilevers have been obtained with a high yield and with an undamaged circuitry. In order to determine the actual sensitivity of such soft sensors and their gauge factor, a characterization method (consisting in AFM actuation) has been developed. Gauge factor for polysilicon deposited at CNM and at AustriaMicroSystems was -12 and -9 respectively. The maximum force sensitivity and force resolution obtained for CNM fabricated sensors have been 11 V/nN and 28 nN respectively. The maximum force sensitivity and force resolution obtained for CMOS fabricated sensors have been 11 V/pN and 27 pN respectively. In both cases, resolution is limited by the noise in the circuit, whose main contributions are Hooge noise (or 1/f) and Johnson noise (or thermoelectric). Conductive, but isolated, nitride cantilevers (with a wrapped gold layer) with a sharp tip (that has an opened contact) have been designed and fabricated to be used in conductive measurements in liquid environments. Polysilicon tips definition has been optimized to improve the whole probes fabrication process, achieving apex radii smaller than 20 nm using a dry etching by means of a DRIE equipment followed by sharpening oxidation.
A complete and novel technological process has been developed for the fabrication of AFM cantilevers. Different tip materials and machining processes have been analyzed, obtaining the best results for crystalline silicon tips defined using a DRIE equipment to machine rocket tips. Isotropic processes with low cross-wafer dispersion and anisotropic processes with low cross-wafer dispersion and low scalloping have been achieved. After a sharpening oxidation, apex radii smaller than 5 nm have been achieved. Complete AFM probes have been fabricated. In order to test the developed technology, probes with similar characteristics to commercial ones were fabricated and used to raster scan some samples (in contact and non-contact mode) yielding results similar to those obtained with commercial probes. In addition, some special probes have been fabricated for nanoindentation over polymers and also to improve Kelvin Probe Force Microscopy (KPFM) performance. Thus, the availability of a technology that allows
the fabrication of customized cantilevers is very useful for the development of new SPM applications.
Diez, Stefan, und Jonathon Howard. „Nanotechnological applications of biomolecular motor systems“. Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1223724473713-41365.
Der volle Inhalt der QuelleRecent advances in understanding how biomolecular motors work have raised the possibility that they might find applications as nanomachines. For example, they could be used as molecule- sized robots that work in molecular factories where small, but intricate structures are made on tiny assembly lines, that construct networks of molecular conductors and transistors for use as electrical circuits, or that continually patrol inside “adaptive” materials and repair them when necessary. Thus biomolecular motors could form the basis of bottom-up approaches for constructing, active structuring and maintenance at the nanometer scale
Wilson, John Tanner. „Biomolecular strategies for cell surface engineering“. Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/33846.
Der volle Inhalt der QuelleBerglund, Maria. „Biomolecular Aspects of Flexor Tendon Healing“. Doctoral thesis, Uppsala universitet, Handkirurgi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-120304.
Der volle Inhalt der QuelleBiomolecular aspects of flexor tendon healing
Tiwari, Purushottam Babu. „Multimode Analysis of Nanoscale Biomolecular Interactions“. FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/1923.
Der volle Inhalt der QuelleLord, Megan Susan Graduate School of Biomedical Engineering Faculty of Engineering UNSW. „Biomolecular and cellular interactions with surfaces“. Awarded by:University of New South Wales. Graduate School of Biomedical Engineering, 2006. http://handle.unsw.edu.au/1959.4/24213.
Der volle Inhalt der QuelleHeucke, Stephan F. „Advancing nanophotonic devices for biomolecular analysis“. Diss., Ludwig-Maximilians-Universität München, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-165294.
Der volle Inhalt der QuelleSantoso, Yusdi. „Single-Molecule Studies of Biomolecular Dynamics“. Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526113.
Der volle Inhalt der QuelleShaw, Graeme Livingstone. „Biomolecular NMR : new techniques and applications“. Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360828.
Der volle Inhalt der QuelleBurg, Thomas P. (Thomas Peter). „Suspended microchannel resonators for biomolecular detection“. Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34471.
Der volle Inhalt der QuelleIncludes bibliographical references (leaves 115-124).
Microfabricated transducers enable the label-free detection of biological molecules in nanoliter sized samples. Integrating microfluidic detection and sample-preparation can greatly leverage experimental efforts in systems biology and pharmaceutical research by increasing analysis throughput while dramatically reducing reagent cost. Microfabricated resonant mass sensors are among the most sensitive devices for chemical detection, but degradation of the sensitivity in liquid has so far hindered their successful application in biology. This thesis introduces a type of resonant transducer that overcomes this limitation by a new device design: Adsorption of molecules to the inside walls of a suspended microfluidic channel is detected by measuring the change in mechanical resonance frequency of the channel. In contrast to resonant mass sensors submersed in water, the sensitivity and frequency resolution of the suspended microchannel resonator is not degraded by the presence of the fluid. Our device differs from a vibrating tube densitometer in that the channel is very thin, and only molecules that bind to the walls can build up enough mass to be detected; this provides a path to specificity via molecular recognition by immobilized receptors.
(cont.) Suspended silicon nitride channels have been fabricated through a sacrificial polysilicon process and bulk micromachining, and the packaging and microfluidic interfacing of the resonant sensors has been addressed. Device characterization at 30 mTorr ambient pressure reveals a quality factor of more than 10,000 for water filled resonators; this is two orders of magnitude higher than previously demonstrated Q-values of resonant mass sensors for biological measurements. Calculation of the noise and the sensitivity of suspended microchannel resonators indicate a physical limit for mass resolution of approximately 0.01 ng/cm2 (1 Hz bandwidth). A resolution of -0.1 ng/cm2 has been experimentally demonstrated in this work. This resolution constitutes a tenfold improvement over commercial quartz crystal microbalance based instruments. The ability to detect adsorbing biomolecules by resonance frequency has been validated through binding experiments with avidin and various biotinylated proteins.
by Thomas P. Burg.
Ph.D.
Marti, Villalba Maria. „Biomolecular engineered sensors for diagnostic applications“. Thesis, Nottingham Trent University, 2009. http://irep.ntu.ac.uk/id/eprint/363/.
Der volle Inhalt der QuelleGerogiokas, Georgios. „Quantitative models of biomolecular hydration thermodynamics“. Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/14181.
Der volle Inhalt der QuelleCraig, Erin Michelle. „Models for Brownian and biomolecular motors /“. Connect to title online (Scholars' Bank) Connect to title online (ProQuest), 2008. http://hdl.handle.net/1794/8565.
Der volle Inhalt der QuelleTypescript. Includes vita and abstract. Includes bibliographical references (leaves 164-171). Also available online in Scholars' Bank; and in ProQuest, free to University of Oregon users.
Rayan, Mihir K. „Spray deposition of biomolecular thin films“. [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002681.
Der volle Inhalt der QuelleHuang, Suxian. „Biomolecular nanopatterning and single molecule detection“. Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1835449111&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Der volle Inhalt der QuelleCraig, Erin Michelle 1980. „Models for Brownian and biomolecular motors“. Thesis, University of Oregon, 2008. http://hdl.handle.net/1794/8565.
Der volle Inhalt der QuelleBiological molecular motors, which use chemical energy from ATP hydrolysis to generate mechanical force, are involved in a variety of important mechanical processes in eukaryotic cells, such as intracellular transport, cell division and muscle contraction. These motors, which produce motion on the nanoscale, operate in the presence of substantial thermal noise. In this dissertation, two approaches are used to model the physics of nanoscale motors: (1) A theoretically established type of Brownian motor called the "flashing ratchet" is studied. This motor transports diffusive particles in a preferred direction. (2) A coarse-grained mechanical model for the biological molecular motor myosin-V is developed, and used to study the role of Brownian diffusion, and the interaction between chemical and mechanical degrees of freedom, in the transport mechanism of this motor. In chapter III, Brownian dynamics simulations and analytical calculations demonstrate that the average velocity of rigid chains of particles in a flashing ratchet reverses direction in response to changing the size of the chain or the temperature of the heat bath. Recent studies have introduced policies for "closed-loop" control of a flashing ratchet, in which the system is controlled based on information about its internal state (such as the positional distribution of particles). In chapter IV, the effect of time delay on the implementation of closed-loop control of a flashing ratchet is investigated. For a large ensemble, a well-chosen delay time improves the ratchet performance (increasing the velocity) by synchronizing into a quasi-stable mode that takes advantage of the semi-deterministic nature of the time development of average quantities for a large ensemble. I n chapter V, a coarse-grained mechanical model is presented for the transport mechanism of myosin-V, which walks along intracellular filaments. The model is well constrained by experimental data on the mechanical properties of myosin V and on the kinetic cycle. An experimentally motivated model for the intramolecular coordination of the motor's steps is proposed and tested.
Adviser: Heiner Linke