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Artykuły w czasopismach na temat "Sonde luminescente"
Olsson, Débora Cristina, Ney Luis Pippi, Alceu Gaspar Raiser, Graziela Kopinitis de Oliveira, Tiago Luis Eilers Treichel i Fabiano Zanini Salbego. "Marcadores fluorescentes coloidais: conceitos e aplicações". Ciência Rural 41, nr 6 (10.06.2011): 1043–50. http://dx.doi.org/10.1590/s0103-84782011005000065.
Pełny tekst źródłaRozprawy doktorskie na temat "Sonde luminescente"
Hallil, Abdelbasset. "Synthèse par décharge luminescente RF et caractérisation de couches minces de carbone amorphe hydrogène. Diagnostic de la décharge par sonde de Langmuir". Toulouse 3, 1995. http://www.theses.fr/1995TOU30222.
Pełny tekst źródłaEl, moujarrad Imane. "Nano-objets multifonctionnels pour la nanothermomètrie en milieu biologique : Etude de propriétés physiques sous confinement". Electronic Thesis or Diss., Université de Montpellier (2022-....), 2023. http://www.theses.fr/2023UMONS078.
Pełny tekst źródłaThe thesis work focuses on the development of multifunctional core/shell nanoplatforms including a functional core acting as a nanothermometer encapsulated in a PMO-type mesoporous hybrid silica layer. The elaboration of the systems was initially carried out according to the strategy of a mesoporous hybrid silica deposition on a silica-based condensed core ("hard template" strategy). A fundamental study of the structure, chemical nature and size of the shell is conducted using a multi-scale experimental approach. The nano-object size modulation in a range between 50 and 500 nm approximately has been demonstrated, as well as the modulation of the chemical composition based on the use of different bridged organosilane precursors. The results revealed that the organization of the mesopores of the layer is conditioned by the supramolecular interactions between organic substructures of the hybrid silica. The elaboration of a photoluminescent functional core doped with rare earths (β-NaYF4: Yb3+, Er3+) was then carried out, followed by the deposition of a hybrid layer in order to obtain multishell systems. These systems have been modified to introduce a hollow space between the two phases. The thermometric performance of the functional nanoparticles as a function of the confinement type were studied in detail on the basis of their photoluminescence response. The evaluation of the performance of the resulting nanothermometers is encouraging for applications in the biological field
Le, Ludec Jean-Pierre. "Instrumentation et traitement du signal pour la caractérisation thermique et mécanique d'un four de tirage Czochralski sous champ magnétique : application à la croissance de GaAs". Grenoble 1, 1989. http://www.theses.fr/1989GRE10141.
Pełny tekst źródłaBotz, Alexandra. "Complexes peptide-lanthanide : vers de nouvelles sondes luminescentes et magnétiques de l'ADN". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAV044.
Pełny tekst źródłaDNA is an essential biomolecule, which ensures the support and the transfer of the genetic information in all organisms, and is involved in many interaction processes. The development of effective molecular tools interacting with DNA and highlighting this interaction is a field of research of high relevance, in order to understand essential biological events and for medical diagnostics. Thanks to their unique spectroscopic and magnetic properties, lanthanide ions (Ln3+) have proved to be very promising candidates in the design of such probes. In fact, luminescence of Tb3+ and Eu3+ is highly sensitive with narrow and specific emission bands, and is time-resolved with long luminescence lifetimes. Gd3+ ion, thanks to a high spin magnetic moment and a long electronic relaxation time, has interesting magnetic properties to enhance the nuclear paramagnetic relaxation of water protons.In this work, we take advantage of lanthanides’ properties within peptides, optimized for complexing these ions, and functionalized with a DNA binding unit. Developed Gd3+ complexes are powerful tools that can highlight the interaction with DNA, thanks to a significant increase of relaxivity at intermediate fields. This one is characteristic of the increase of the rotational correlation time inherent to the formation of the complex‑DNA adduct. Moreover, the Tb3+ complexes include a sensitizer of this ion and a DNA binding unit, allowing the conception of effective DNA probes with optimized emission properties. A judicious choice of the trio “DNA binding unit – sensitizer – lanthanide” allows to switch off the lanthanide luminescence without DNA and to turn it on after interaction with this nucleic acid. These luminescent probes are also able to induce an increase of the metal-centered luminescence after interaction with other nucleic acids
Coltro, Leda. "Estudo estrutural de superficie de polietileno empregando sonda luminescente". [s.n.], 1994. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249471.
Pełny tekst źródłaTese (doutorado) - Universidade Estadual de Campinas, Instituto de Química
Made available in DSpace on 2018-07-19T09:29:17Z (GMT). No. of bitstreams: 1 Coltro_Leda_D.pdf: 5299531 bytes, checksum: 6803c4a37ff55a9dab08851597d44c06 (MD5) Previous issue date: 1994
Doutorado
Vaccari, Maria Chiara. "Design e sintesi di nuove sonde luminescenti per il "targeting" dell'avidina". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/4938/.
Pełny tekst źródłaKadjane, Pascal N'Guessan. "Sondes luminescentes à base de lanthanides solubles dans l'eau". Strasbourg, 2009. https://publication-theses.unistra.fr/restreint/theses_doctorat/2009/KADJANE_Pascal_NGuessan_2009.pdf.
Pełny tekst źródłaThe high sensitivity of analytical methods based on fluorescence has led to the development of new fluorescent markers for biological analysis and imaging. However, the use of these dyes is limited by the selffluorescence of biological media and light scattering. The use of long-lived luminophores coupled to time-resolved detection of the signal allow to avoid these problems and to enhance the detection sensitivity. The lanthanide ion chelates, in particular of europium and terbium, proved to be good candidates due to their long-lived excited states lifetimes. In these complexes, the direct excitation of lanthanide being difficult to achieve, it is indirectly obtained through organic chromophores, absorbing in the UV, creating risks of photodegradation. This work was first based on the synthesis of organic ligands and platinum-based metalloligands allowing to study the displacement of the absorption properties of europium complexes toward the visible region. Then, we synthesised europium and terbium complexes from nonadentate ligands based on bispyrazolylpyridine and studied their spectroscopic properties (absorption, emission, luminescence quantum yield and lifetime). These complexes possess good complexation and luminescence properties and the synthetic methodology permits the introduction of a carboxylate function, potentially activable into NHS ester for biological labelling. Some europium chelates have been tested in cell imaging and others for their biphotonic absorption properties (allowing the excitation of the complexes in the red or infra-red region). For a water soluble ytterbium complex possessing a grafting function, the long-lived luminescence lifetime (1,6 ms) opens perspectives for time-resolved detection in the infra-red region
Kadjane, Pascal N'Guessan Ziessel Raymond. "Sondes luminescentes à base de lanthanides solubles dans l'eau". Strasbourg : Université de Strasbourg, 2009. http://eprints-scd-ulp.u-strasbg.fr:8080/00001088.
Pełny tekst źródłaBoulay, Alexandre. "Sondes hétérobimétalliques pour l'imagerie bimodale". Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2553/.
Pełny tekst źródłaThe multimodality approach in biomedical imaging has gained in popularity over the last decade with the development of a new class of contrast agents : the bimodal probes. The combination of complementary imaging modalities appears as a convenient pathway to overcome the weakness of each imaging modality and should allow access to microscopic and macroscopic data at the same time. The synthesis of new heterobimetallic complexes and the evaluation of their physico-chemical properties (aqueous stabilities, photophysical and relaxometric evaluations) are reported in this document. Using a bichelating ligand with a 2,2'-bipyridine moiety for the complexation of transition metal ions and a heptadentate moiety (2,6-bis[N,N-bis(carboxymethyl)aminomethyl] pyridine, PMN) for the chelation of lanthanide ions, various complexes were synthesized. Their physico-chemical properties were analyzed and they were founded sustainable with bimodal applications, especially in view of a promising MRI/Optical imaging duality application. The preliminary data of cytotoxicity and cellular microscopy studies are compatible with these conclusions. A second approach was used to built heterobimetallic tricarbonyl Re(I)-based complexes using the "2+1" complexation principle to introduce an auxiliary ligand in the coordination sphere of the metallic ion. According to this way, the first dinuclear Re(I)/99mTc(I) complex for an optical imaging/TEMP imaging was reported as well as an original structure combining Re(I) and Gd(III) ions for a MRI/Optical imaging duality application. The bioconjugation studies of this last compound are undergoing following favorable preliminary cytotoxicity experiments
Cepeda, Céline. "Synthèse et caractérisation de sondes luminescentes peptidiques pour l'imagerie de cations". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAV072/document.
Pełny tekst źródłaMetal ions are essential for life. Complex machineries at both the cellular and the whole organism levels regulate finely their concentrations. A disruption of their homeostasis can lead to disorders and serious diseases. In order to better understand the biological processes involving these metals, it is important to be able to detect, track and quantify them. The aim of my PhD was to develop luminescent probes for the detection of Zn2+ and Cu+. We prepared and characterized sophisticated molecules exhibiting the qualities required for this goal. These molecules were synthesized by convergent methods involving various chemoselective ligations. We developed a family of selective zinc probes, inensiometric or ratiometric, which emitted in the visible or near infra red. In order to elaborate probes for cellular imaging by confocal microscopy, we designed a synthetic pathway to add different penetrating peptides to these probes. They were tested in cellulo. Although they didn’t demonstrate zinc detection, they allowed identification of the penetrating sequence which permitted the cellular internalisation. We then developed a probe which incorporated two lanthanide complexes (terbium and europium) for the Cu+ detection. This probe responds perfectly to the presence of Cu+ with a ratiometric signal. Its counter-intuitive behaviour was studied thanks to the synthesis and the characterisations of different « mutants »
Książki na temat "Sonde luminescente"
service), ScienceDirect (Online, red. Single molecule tools: Super-resolution, particle tracking, multiparameter and force based methods. San Diego, CA: Academic Press/Elsevier, 2010.
Znajdź pełny tekst źródła1947-, Kricka Larry J., red. Nonisotopic probing, blotting, and sequencing. Wyd. 2. San Diego: Academic Press, 1995.
Znajdź pełny tekst źródłaKricka, Larry J. Nonisotoic Probing, Blotting, and Sequencing, Second Edition. Wyd. 2. Academic Press, 1995.
Znajdź pełny tekst źródłaThe Fluorescent Protein Revolution. CRC Press, 2012.
Znajdź pełny tekst źródła