Дисертації з теми "Plasmodi"
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Ramirez, Francisco. "Surface Plasmon Hybridization in Novel Plasmonic Phenomena." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/917.
Повний текст джерелаTan, Shiaw Juen. "Linear and nonlinear propagation of localised plasmon in metallic nanostructures." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/52635/1/Shiaw_Tan_Thesis.pdf.
Повний текст джерелаMejia, Pedro. "Amélioration et utilisation d'un modèle murin des stades érythrocytaires du paludisme humain." Rouen, 2006. http://www.theses.fr/2006ROUES062.
Повний текст джерелаLupetti, Mattia. "Plasmonic generation of attosecond pulses and attosecond imaging of surface plasmons." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-183678.
Повний текст джерелаAttosekundenpulse sind ultrakurze extrem-ultraviolette (XUV) Pulse, die durch einen nicht-linearen, von einer nah-infraroten (NIR) Laserquelle stimulierten Anregungsprozess erzeugt werden. Attosekundenpulse können verwendet werden, um die Elektronendynamik eines ultraschnellen Prozesses durch die ``Attosecond Streaking'' Technik zu messen, mit einer Auflösung auf der Attosekundenskala. In dieser Dissertation wird gezeigt, dass sowohl die Erzeugung von Attosekundenpulsen als auch die Messung ultraschneller Prozesse mittels Attosekundenpulse auf Fälle erweitert werden können, bei denen die Anregungs- und Streakingsfelder von Oberflächenplasmonen generiert werden, welche bei nahinfraroten Wellenlängen auf Nanostrukturen angeregt werden. Oberflächenplasmonen sind optische Moden, die aus einer kollektiven Schwingung der Elektronen an der Oberfläche in Resonanz mit einer externen Quelle entstehen. Im ersten Abschnitt dieser Dissertation wird das Konzept der High Harmonic Generation (HHG) in plasmonisch erhöhten Feldern durch numerische Simulationen analysiert. Ein NIR Puls wird mit einem Oberflächenplasmon, das sich in einem konischen, mit Edelgas gefüllten, Hohlleiter ausbreitet, gekoppelt. Die Intensität des plasmonischen Feldes steigt mit der Verringerung des Durchmessers des Hohlleiters, sodass die Felderhöhung an seiner Spitze groß genug wird, um hohe harmonische Strahlung zu generieren. Es wird nachgewiesen, dass die Herstellung von isolierten Attosekundenpulsen mit außergewöhnlichen Zeit- und Raumstrukturen möglich ist. Trotzdem ist deren Intensität um mehrere Größenordnungen niedriger als die, die in Experimenten mit fokussierten Laserpulsen erreicht werden kann. Im zweiten Abschnitt wird eine experimentelle Technik für die Abbildung plasmonischer Oberflächenanregungen vorgeschlagen, wobei Attosekundenpulse verwendet werden, um das Feld an der Oberfläche mittels ``Momentum Streaking'' der photoionisierten Elektronen zu messen. Dieses Konzept ist eine Erweiterung der ``Attosecond Streak Camera'', welches ich ``Attosecond Photoscopy'' nenne. Es ermöglicht die Abbildung eines Plasmons in Zeit und Raum während des Anregungsprozesses. Anhand von numerischen Simulationen wird es gezeigt, dass die wesentlichen Parameter des plasmonischen Resonanzaufbaus mit subfemtosekunden-Präzision bestimmt werden können. Zuletzt wird die Methode für die numerische Lösung der Maxwell-Gleichungen diskutiert, mit Fokus auf das Problem der absorbierenden Randbedingungen. Neue Einsichten in die mathematische Formulierung der Randbedingungen der Maxwell-Gleichungen werden vorgestellt.
Henry, Véronique. "Récepteurs érythrocytaires impliqués dans la pénétration du "Plasmodium" dans l'hématie." Paris 5, 1988. http://www.theses.fr/1988PA05P102.
Повний текст джерелаMalhotra, Khushbeer. "Etude "in vitro" de l'action des constituants du système microbicide des polynucléaires humains sur les formes aséxuées de "Plasmodium falciparum" : influence de leur association avec divers antimalariques." Paris 5, 1988. http://www.theses.fr/1988PA05P620.
Повний текст джерелаUdo, Edet Ekpenyong. "Characterisation and molecular studies of plasmids from Nigerian staphylococci." Thesis, Curtin University, 1991. http://hdl.handle.net/20.500.11937/1845.
Повний текст джерелаJansen, Yvette. "Characterisation of a high copy number mutant pAL5000 origin of replication." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52159.
Повний текст джерелаENGLISH ABSTRACT: The plasmid pAL5000 is a mycobacterial plasmid isolated from Mycobacterium fortuitum. It is a low copy number plasmid, which replicates in both fast growing (e.g. M. smegmatis) and slow growing (e.g. M. bovis BCG) mycobacteria. Most mycobacterial-E. coli shuttle vectors utilise the pAL5000 origin of replication. The minimum replicon consists of ORF1 (RepA), ORF2 (RepB) and the origin of replication. Dr W.R. Bourn created an E. coli-mycobacterial vector based on the pAL5000 origin of replication (pORI) and then subjected it to semi-random mutagenesis. A high copy number mutant was identified (pHIGH) and the causative mutation was tentatively identified as a 3bp deletion situated just upstream of repB. This work describes the further characterisation of the mutant plasmid. Firstly, it was shown by retransforming M. smegmatis with both the original and mutant plasmids (pORI and pHIGH), that the mutation causing the increased copy number was plasmid-encoded and not on the chromosome. Following this, it was demonstrated by simple subcloning of the region that carries the 3 bp deletion, that other pAL5000-based vectors could be converted to high copy number. In addition to this, the subcloned region was sequenced and the nature of the mutations was confirmed. The subcloning experiment confirmed that the 3bp deletion caused the high copy number phenotype. Following this, the exact copy number of pHIGH and the relative increase in copy number was determined. From this, the copy number of pORI could also be determined. The plasmid pHIGH has a copy number of approximately 54, compared to the 8 of pORI (a relative increase by a factor of 7). Because it is important for researchers to know the characteristics of the vectors that they use, especially the influence it will have on its host, stability tests and growth curves were also performed. It was seen that the higher copy number did not markedly increase the stability, however, this is because pORI is already extremely, and unexpectedly, stable in the host M. smegmatis. According to the growth curves, the increased copy number has little effect on the growth of the host M. smegmatis. Possible mechanisms for the increased copy number were then investigated. By using a promoter probe vector, the possible existence of a promoter situated between the two open reading frames of pAL5000 (repA and repB) was investigated. It was thought that the mutation might have created, or changed an existing promoter, situated between repA and repB. The results showed, however, that in both pORI and pHIGH there might be a very weak promoter upstream of repB, but the mutation did not cause any change that was measurable by the method that was used. A further possibility was that the mutation caused a change in the RNA secondary structure, which might then have an effect on the translational efficiency of RepB. It was found that the 3bp deletion in pHIGH causes a change in the local RNA secondary structure around the ribosomal binding site and the start codon, when compared to pORI (wild type). This change may cause the translation initiation rate of RepB to be different between pHIGH and pORI. Ultimately it would lead to a different ratio of RepA and RepB in the cell.
AFRIKAANSE OPSOMMING: Die plasmied pAL5000 is ‘n mikobakteriele plasmied wat vanuit Mycobacterium fortuitum gei'soleer is. Dit is ‘n lae kopie-getal plasmied wat in beide vinnig groeiende (bv. M. smegmatis) en stadig groeiende (bv. M. bovis BCG) mikobakteriee kan repliseer. Die meeste mikobakteriele-E. coli shuttle vektore gebruik die pAL5000 oorsprong van replisering. Die minimum replikon bestaan uit ORF1 (RepA), ORF2 (RepB) en die oorsprong van replisering. Dr. W.R. Bourn het ‘n E. coli-mikobakteriele vektor gemaak wat gebaseer is op die pAL5000 oorsprong van replisering (pORI), en dit onderwerp aan semi-random mutagenese. ‘n Hoë kopie-getal mutant is gei'dentifiseer (pHIGH) en die mutasie hiervoor verantwoordelik was tentatief gei'dentifiseer as ‘n 3bp delesie, net stroomop van repB. Die projek beskryf die verdere karakterisering van die mutante plasmied. Eerstens, deur M. smegmatis te hertransformeer met die plasmied DNA (pORI en pHIGH), is dit bewys dat dit mutasie wat die toename in kopie-getal veroorsaak, deur die plasmied gekodeer word, en dat dit nie ‘n mutasie op die chromosoom is nie. Hierna is dit deur eenvoudige subklonering bewys dat die gedeelte wat die 3bp delesie dra, ander pAL5000-gebaseerde vektore ook kan verander in ‘n hoër kopie-getal. Die sub-klonerings eksperiment het ook bewys dat die 3 bp delesie die oorsaak is vir die hoë kopie-getal fenotipe. Volgende is die presiese kopie-getal van pHIGH en die relatiewe toename in kopiegetal bepaal. Die kopie-getal van pORI kon vanaf hierdie data bepaal word. Die plasmied pHIGH het ‘n kopie-getal van ongeveer 54 in M. smegmatis, in vergelyking met die 8 van pORI (‘n relatiewe toename met ‘n faktor van 7). Aangesien dit vir navorsers belangrik is om die eienskappe van die vektore wat hulle gebruik, te ken, en veral die invloed wat dit op die gasheer sal hê, is stabiliteits toetse, en groeikurwes gedoen. Die hoër kopie-getal het nie die stabiliteit werklik verbeter nie, maar dit is omdat pORI alreeds uiters stabiel is in die gasheer M. smegmatis. Volgens die groeikurwes het die toename in kopie-getal ‘n minimale effek op die groei van die gasheer M. smegmatis. Moontlike meganismes vir die hoër kopie-getal is ook ondersoek. Die moontlike bestaan van ‘n promoter tussen die twee oop-leesrame van pAL5000 (repA en repB) is ondersoek deur gebruik te maak van ‘n “promoter probe” vektor. Die mutasie kon moontlik ‘n promoter geskep het, of ‘n bestaande een tussen repA en repB verander het. Die resultate het gewys dat daar in beide pORI en pHIGH moontlik ‘n baie swak promoter stroomop van repB is, maar die mutasie het nie enige veranderinge veroorsaak wat meetbaar was met die metode wat gebruik is nie. ‘n Verdere moontlikheid was dat die mutasie ‘n verandering in die RNA sekondere struktuur kon veroorsaak het, en dit mag ‘n effek hê op die translasie effektiwiteit van RepB. Daar is gevind dat, in vergelyking met pORI, het die 3bp delesie in pHIGH ‘n verandering in die lokale RNA sekondere struktuur rondom die ribosomale bindings posisie en die begin-kodon veroorsaak. Die verandering mag veroorsaak dat die translasie inisiasie tempo van RepB verskillend is vir pORI en pHIGH. Uiteindelik sal dit lei tot ‘n heeltemal ander verhouding van RepA en RepB in die sel.
Duval, Linda. "Diversité, évolution, co-spéciation et capture d'hôte chez les Haemosporidia de la faune sauvage de Madagascar et du Cambodge." Paris, Muséum national d'histoire naturelle, 2007. http://www.theses.fr/2007MNHN0019.
Повний текст джерелаThis thesis contributes, in using morphological, molecular and phylogenetic aspects to a better understanding of the Haemosporidian parasite diversity in vertebrate classes of birds, reptiles and mammals in two biodiversity hot spots, Madagascar and Cambodia. An atlas of Haemosporidia in wildlife of Madagascar and Cambodia has been realised to make available these data for public use. The parasites isolated have been characterized and identified with four molecular markers (cyt b, tufA, ldh and cox 1). The phylogenetic signal of each molecular marker has been evaluated. The mitochondrial genes, cyt b and cox 1 could carry a phylogenetic signal sufficient to conduct phylogenetic tree analyses comparing to tufA apicoplaste gene and ldh nuclear gene. The phylogenetic analyses highlighted host switches events between two vertebrate host classes, birds and mammals (bats). A co-evolutionary host parasite scenario bas been proposed for primate Plasmodium (including P. Falciparum in human) and Hominidae host family. A estimation of the emergence of P. Falciparum between 7 and 9 millions years has been deduced from this evolutionary scenario. P. Ovale would share a most recent common ancestor with a chimpanzee Plasmodium. Finally, greats apes could appear as a potential reservoirs for three of the four human Plasmodium (P. Falciparum, P. Ovale et P. Malariae)
Rahbany, Nancy. "Towards integrated optics at the nanoscale : plasmon-emitter coupling using plasmonic structures." Thesis, Troyes, 2016. http://www.theses.fr/2016TROY0003/document.
Повний текст джерелаThere is a growing interest nowadays in the study of strong light-matter interaction at the nanoscale, specifically between plasmons and emitters. Researchers in the fields of plasmonics, nanooptics and nanophotonics are constantly exploring new ways to control and enhance surface plasmon launching, propagation, and localization. Moreover, emitters placed in the vicinity of metallic nanoantennas exhibit a fluorescence rate enhancement due to the increase in the electromagnetic field confinement. However, numerous applications such as optical electronics, nanofabrication and sensing devices require a very high optical resolution which is limited by the diffraction limit. Targeting this problem, we introduce a novel plasmonic structure consisting of nanoantennas integrated in the center of ring diffraction gratings. Propagating surface plasmon polaritons (SPPs) are generated by the ring grating and couple with localized surface plasmons (LSPs) at the nanoantennas exciting emitters placed in the gap. We provide a thorough characterization of the optical properties of the simple ring grating structure, the double bowtie nanoantenna, and the integrated ring grating/nanoantenna structure, and study the coupling with an ensemble of molecules as well as single SiV centers in diamond. The combination of the sub-wavelength confinement of LSPs and the high energy of SPPs in our structure leads to precise nanofocusing at the nanoscale, which can be implemented to study plasmon-emitter coupling in the weak and strong coupling regimes
Seyler, Richard W. "Plasmid stability of pUB110 and pUB110-derived plasmids in Bacillus sphaericus 2362." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-03022010-020139/.
Повний текст джерелаLamowski, Simon [Verfasser]. "Theory of Plasmonic Nanostructures : Plasmon-Polaritons and Light-Induced Transport / Simon Lamowski." Konstanz : KOPS Universität Konstanz, 2020. http://d-nb.info/1233203231/34.
Повний текст джерелаGazzola, Enrico. "Anisotropic propagation of Surface Plasmon Polaritons: study and exploitations." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423724.
Повний текст джерелаSuperfici metalliche con modulazione sinusoidale, note come grating plasmonici, costituiscono una delle principali strutture che permettono di ottenere l’accoppiamento tra un fascio di luce incidente e un Plasmone Polaritone di Superficie. Una varietà di fenomeni sono accessibili quando il grating viene ruotato di un angolo azimutale rispetto al piano di incidenza. Scopo di questo lavoro è uno studio approfondito delle proprietà di propagazione del modo di superficie in questa configurazione, correlando il ruolo dell’anisotropia introdotta dal grating con la posizione e forma del dip di risonanza plasmonica negli spettri in riflettanza. Vengono presentati modelli analitici e interpretazioni fisiche; metodi sia sperimentali che computazionali vengono impiegati per validare i modelli, includendo l’osservazione di nuovi effetti. I modi accoppiati di film sottile, ovvero i Plasmoni Long Range e Short Range, vengono studiati e osservati sperimentalmente nella configurazione ad azimuth ruotato. Una particolare attenzione è dedicata al ruolo delle perdite radiative del plasmone, dovute allo scattering da parte del grating. La loro dipendenza dall’ampiezza del grating e dalla direzione di propagazione del plasmone è spiegata, e correlata con la larghezza delle risonanze plasmoniche osservabili. I risultati di queste analisi conducono alla valutazione delle sensibilità e Figura di Merito che si possono ottenere quando le configurazioni considerate sono sfruttate nell’ambito della sensoristica a Risonanza Plasmonica di Superficie. I concetti e metodi sviluppati si dimostrano strumenti di valore per predire e interpretare la risposta di strutture plasmoniche reali, applicate come dispositivi di sensing verso analiti allo stato gassoso. Le piattaforme plasmoniche vengono testate come sensori per TNT, idrogeno e composti aromatici, con risultati promettenti. Un esperimento particolarmente interessante è l’uso combinato dei modi Long Range e della configurazione ad azimuth ruotato per incrementare notevolmente le performance di un sensore di xylene
Hou, Xue. "Nano-objets photo-activés pour le ciblage cellulaire et l’hyperthermie." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC011/document.
Повний текст джерелаPlasmonic nanoparticles possessinteresting properties thanks to the localizedsurface plasmon resonance. In addition totheir high photothermal conversion efficiency,the heat release confinement can bemodulated by the type of light source used(pulsed or continuous laser). These propertiesmake the plasmonic nanoparticles a potentialsolution for cancer therapy by hyperthermia.In order to develop such a biomedicalapplication, it is necessary to optimize theabsorption of light energy and the targeting ofnanoparticles on the tumor considered.In this thesis, the influence of the photogeneratedhot electrons on the absorption ofultrashort laser pulses by nanoparticles is firststudied. Then, a work carried out withchemists, biologists and physicians for theapplication of gold nanoparticles irradiated byultrashort laser pulses to cancer therapy isdescribed. Finally, we present a preliminarystudy on the photoluminescence of plasmonicnanoparticles, the origin of which is stillcontroversial, by applying a model accountingfor the non-thermal nature of the hot electrondistribution
Prabhu, G. Radhakrishna. "Studies On Surface Plasmon Resonance And Related Experimental Methods Using Fixed Plasmon Angle." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/205.
Повний текст джерелаJehl, Patrick. "Mécanismes de la chloroquinorésistance chez "Plasmodium falciparum" : intérêt de l'étude de la multirésistance des cellules cancéreuses." Paris 5, 1989. http://www.theses.fr/1989PA05P070.
Повний текст джерелаBayard, Pierre. "Etude de la prémunition anti-paludéenne par des épreuves de phagocytose de parasites de "Plasmodium falciparum" : caractérisation partielle d'un antigène potentiellement en rapport avec la protection anti-plasmodiale." Paris 5, 1988. http://www.theses.fr/1988PA05P626.
Повний текст джерелаUrdaneta, Marquez Ludmel. "Structure des populations et résistance aux antipaludiques chez "Plasmodium falciparum" au Venezuela." Montpellier 2, 1998. http://www.theses.fr/1998MON20276.
Повний текст джерелаDéchamps, Sandrine. "Etude de la diversité et de la crucialité des voies de synthèse des phospholipides structuraux chez différentes espèces de Plasmodium." Montpellier 2, 2009. http://www.theses.fr/2009MON20260.
Повний текст джерелаMalaria, a disease affecting not only humans but also various other vertebrates, is caused by a protozoon of the genus Plasmodium. The Plasmodium falciparum species is responsible for the most severe form of malaria in humans. At the intraerythrocytic stage of its complex life cycle, lipids are among the most critical components to be required for parasite growth and proliferation. Phospholipids (PLs), the main membrane constituents, mostly originate from the enzymatic machinery of the parasite. Foremost, in the form of two detailed reviews, we compare the PL synthetic pathways of prokaryotes and eukaryotes in general, to those of Plasmodium species. Phosphatidylcholine (PC) and phosphatidylethanolamine (PE), the major structural PLs of the parasite, are synthesized in P. Falciparum through a bewildering number of routes, greatly similar to those of yeast and plants. The first asked question concerned the occurrence of this wide range of metabolic pathways among diverse Plasmodium species. In silico and metabolic labelling studies revealed marked differences in PL synthesis between rodent and non-rodents parasite species. These findings relaunch the debate on the evolutionary origin of the human malaria parasites. As a second issue, the essential nature for parasite survival of the de novo PC and PE synthetic pathways, i. E. The Kennedy pathways, was questioned. Genetic studies in the rodent Plasmodium berghei parasite indicated that both Kennedy pathways are required at the erythrocytic stage. Thus, P. Berghei differs from yeast, in which these routes are auxiliary and not crucial. In parallel, other issues were addressed concerning key enzymes involved in PL synthesis, that are absent in the human host and/or that exhibit particular features compared to eukaryotic counterparts. Further studies in P. Falciparum are needed to characterize in greater detail the PL metabolism – i. E. Individual enzymes, regulation and cruciality – from a fundamental point of view and for antimalarial purposes
Bartholomew, Richard John. "Dynamic plasmonic metasurfaces in the visible spectrum." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274755.
Повний текст джерелаRodrigues, Marcos Renan Flores. "Estudo e caracterização de nanopartículas de Fe3O4, Fe2O3, Fe3O4/ Aunanop E Fe2O3/Aunanop." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/184573.
Повний текст джерелаFe3O4 and Fe2O3 nanoparticles were synthesized by coprecipitation route carried out under N2 atmosphere, maintaining the pH between 9 and 14 at room temperature and using FeCl2 and FeCl3 as precursors. After synthesis the iron oxide nanoparticles were thermally treated at 250, 500 and 800 oC. To obtain a hybrid system, gold nanoparticles were synthesized on the thermally treated oxide nanoparticles. The samples were analyzed by UV-Vis, X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (MET-AR), spectroscopy in the region of Infrared (FTIR), vibrating sample magnitude (VSM) and Mossbauer, and applied to produce H2 through hydrazine decomposition. The results show the synthesis of Fe3O4 nanoparticles with average diameter of about 7 nm. When heated to 250 oC the average size increased to about 11 nm and a small change in the optical and structural behavior was observed, while the superparamegnetic behaviour was maintained. When heated to 500 °C, the average particle size increase to ca 51nm, significant changes in the optical, morphological and structural properties are observed, in addition to a transition from superparamegnetic to paramagnetic behaviour. When heated to 800 oC the effects on the properties are even more significant; the nanoparticles increase to ca. 200 nm, the absorption spectrum in UV-Vis changes significantly and the particles present paramagnetic behaviour. The results suggest that when heated to 250 and 500 oC a mixture of -Fe2O3 e -Fe2O3 is obtained, after heating at 800 oC only -Fe2O3 is observed. The gold nanoparticles synthesized on the iron oxides present average size of 6.0 nm, and did not affect the magnetic properties of the oxides. The iron oxides/gold nanoparticle samples were efficiently applied to produce hydrogen, promoting the decomposition of hydrazin. The selectivity to hydrogen reached up to 33%.
Udo, Edet Ekpenyong. "Characterisation and molecular studies of plasmids from Nigerian staphylococci." Curtin University of Technology, School of Biomedical Sciences, 1991. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=15648.
Повний текст джерелаby plasmids.Conjugation experiments led to the isolation of three unique conjugative plasmids which have not been found to confer resistance to antimicrobials or to produce haemolysins or diffusible pigment (Dip). The three plasmids, pWBG620, pWBG637 and pWBG661, were indistinguishable by restriction endonuclease analysis and DNA-DNA hybridisation. However pWBG620, unlike pWBG637 and pWBG661, was not detected in the cytoplasm of its host and was only detected in transconjugants after it mobilised a non-conjugative Sm-resistance (SmR) plasmid. Further analysis indicated that it is integrated into the chromosome of its host, excises during conjugation and mobilises the SmR plasmid.These plasmids were studied further using pWBG637 as a representative. It was compared with representatives of the two groups of conjugative plasmids which have been reported in the staphylococci. These are the plasmids which encode resistance to Gm, Km and Nm and those which code for the production of diffusible pigment. The three types of conjugative plasmids were compared by restriction endonuclease analysis and DNA- DNA hybridisation and were found to be different. A preliminary restriction map of pWBG637 has also been constructed.However since pWBG637 has no resistance phenotype direct selection for it was not possible in transfer experiments and for incompatibility (Inc.). To study it further it was necessary to construct resistant derivatives which could be selected for in transfer experiments. This was achieved by labelling pWBG637 with resistance transposons to generate two conjugative plasmids, pWBG636 carrying an insert of Tn3851 (Gm- resistance) and pWBG642 carrying an insert of Tn551 (hn- resistance). It was found that transposon labelling had not changed the incompatibility of pWBG637 and therefore pWBG636 and pWBG642 were used in further experiments in place of pWBG637. Inc. ++
tests with the pWBG637 derivatives revealed that the pWBG637 type of plasmid is not only different from the other two types of conjugative plasmids but is different from any of the described staphylococcal Inc. groups and therefore the pWBG637 type of plasmids represent a new Inc. group 15. The pWBG637 type of plasmids were studied further using plasmids pWBG636 and pWBG642. They were able to transfer conjugatively to a capsulated S.aureus strain either by the polyethylene glycol method or on filter membranes. They also transferred by conjugation to S. epidermidis and Streptococcus faecalis and were able to transfer back from these strains to S.aureus indicating that they also replicate in these hosts. Consequently they have been used to mobilise non-conjugative plasmids from S.epidermidis and non phage typable S.aureus. Both plasmids failed to transfer conjugatively to Bacillus subtilis and Escherichia coli.pWBG637 transferred non-conjugative plasmids by mobilising them in a manner similar to mobilisation (donation) in E.coli or by recombining with them to form new resistance plasmids. In one case, pWBG628 which encodes Bla and resistance to Cd, Km, Nm and Sm and has no homology with pWBG637 recombined with it during conjugation to produce three new conjugative plasmids pWBG629, pWBG630 and pWBG631 carrying resistance determinants from pWBG628. One of these plasmids, pWBG629, was found to be pWBG637 which had acquired a 4.5 kb element encoding resistance to Km, Nm and Sm. This element was shown to be transposable in both rec+ and rec- backgrounds and has been designated Tn3854. It expressed Sm resistance in E.coli and differs on this account from the Gram-negative transposon Tn5 which expresses resistance to Km, Nm and Sm in non-enteric bacteria but only resistance to Km and Nm in E. coli.Where possible the non-conjugative plasmids encoding resistance to ++
antimicrobial agents were compared with phenotypically similar plasmids isolated from other parts of the world. It was found that the Tc and Sm resistance plasmids were closely related to other plasmids with the same phenotype whereas the Cm resistance plasmids were different.Although the majority of the Bla plasmids belonged to Inc. group 1 they demonstrated significant restriction enzyme fragment length polymorphism when compared with other Bla plasmids.This study has provided the first data on the genetics of antimicrobial resistance in Nigerian S.aureus. Although many of the plasmids studied were found to be similar to those previously described the isolates also contained some unique and previously undescribed plasmids.
Fisher, Caitlin. "Surface plasmon polariton excitation by end-fire coupling in a variety of plasmonic materials." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16045.
Повний текст джерелаWang, Tao. "Excitation électrique de plasmons de surface avec un microscope à effet tunnel." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00868784.
Повний текст джерелаAjib, Rabih. "Propagation of light in Plasmonic multilayers." Thesis, Université Clermont Auvergne (2017-2020), 2017. http://www.theses.fr/2017CLFAC040/document.
Повний текст джерелаThe field of plasmonics aims at manipulating light using deeply subwavelength nanostructures. Such structures present a peculiar optical response because of the free electron plasma they contain. Actually, when light propagates in the vicinity of metals, usually under the form of a guided mode, it presents a low group velocity. Such modes, like plasmons and gap-plasmons, are said to be slow. In this work we present a general physical analysis of this phenomenon by studying how the energy propagates in metals in a direction that is opposite to the propagation direction of the mode. We show that the group velocity and the energy velocity are the same, and finally introduce the concept of plasmonic drag. Finally, we study how slow guided modes make structures as simple as prism couplers sensitive to the repulsion between electrons inside the plasma
Kvapil, Michal. "Lokalizované povrchové plazmony: principy a aplikace." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229109.
Повний текст джерелаJain, Prashant K. "Plasmons in assembled metal nanostructures." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/28207.
Повний текст джерелаCommittee Chair: El-Sayed, Mostafa A.; Committee Member: Lyon, L. Andrew; Committee Member: Sherrill, C. David; Committee Member: Wang, Zhong Lin; Committee Member: Whetten, Robert L.
Deloron, Philippe. "Evaluation du rôle potentiel des anticorps dirigés contre le "Ring-infected erythrocyte surface antigen" de "Plasmodium falciparum" dans la protection immunitaire contre le paludisme." Paris 5, 1988. http://www.theses.fr/1988PA05P606.
Повний текст джерелаRodríguez, Navarro Judith. "Diversidad plasmídica en cepas de Escherichia coli y Klebsiella pneumoniae: Comparación entre aislados comensales y clínicos." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/671304.
Повний текст джерелаLos plásmidos son moléculas de ADN circular extracromosómicas con capacidad de replicación autónoma y, se describen como principales promotores de la diseminación de genes de resistencia a antimicrobianos. Escherichia coli y Klebsiella pneumoniae, son frecuentes agentes causales de infecciones, importantes por su carácter multirresistente. En estas bacterias, las betalactamasas constituyen uno de los mecanismos de resistencia más difundidos mediante plásmidos. Mediante el estudio y comparación del contenido plasmídico en bacterias de individuos sanos y de pacientes, el objetivo fue determinar las diferencias o similitudes de estos plásmidos entre ambas poblaciones, con el fin de inferir en su origen y evolución en las cepas causantes de infección. Para ello, se aislaron cepas de E. coli (n=244) y K. pneumoniae (n=115) de 150 muestras fecales de individuos sanos y de 202 pacientes con bacteriemia. Se realizó un estudio de sensibilidad a antimicrobianos mediante disco difusión, se identificaron las cepas multirresistentes y se caracterizó, por PCR y secuenciación, los genes codificantes de BLEE, AmpC y carbapenemasas. El estudio de plásmidos se realizó utilizando la técnica de PBRT y, se subtipificaron los plásmidos IncF, IncI1 e IncN mediante pMLST para su diferenciación dentro de un mismo grupo de incompatibilidad. La localización de los genes de resistencia y la definición de la fórmula FAB de los plásmidos IncF, se realizó mediante la técnica de Southern-blot e hibridación. Un 29,2% de las cepas de muestra clínica frente a un 10,8% en individuos sanos resultaron multirresistentes. La prevalencia de cepas de E. coli clínicas productoras de BLEE fue de 17,2% y 5% de AmpC y, en K. pneumoniae, de 16,5% y 1%, respectivamente, además de un 1,9% de carbapenemasas. Por otro lado, se observó una prevalencia del 4,7% de portadores sanos de E. coli productoras de BLEE y un 2,7% de AmpC. Ambas poblaciones han sufrido un aumento en la detección de cepas productoras de estas enzimas siendo también, en ambos casos, la CTX-M-15 y la CMY-2 las betalactamasas más frecuentes. Los resultados del PBRT mostraron como el contenido plasmídico de ambas poblaciones seguía una misma tendencia sin diferencias significativas destacables. La excepción se observó en los replicones L, M, A/C y N, los cuales solo se detectaron en las cepas de muestra clínica. Además, algunos de estos plásmidos con replicón L o N fueron detectados en asociación a genes blaBLEE. La subtipificación de los plásmidos, nos permitió observar cómo dentro de un mismo grupo de incompatibilidad existe una gran diversidad de secuenciotipos. Dentro de los plásmidos IncI1 se observó una gran diferencia entre los ST identificados en las cepas de individuos sanos y pacientes. Solo los ST12 y ST36 se identificaron en ambas poblaciones de E. coli, y todos los ST12 en asociación con el gen blaCMY-2. Por el contrario, a pesar de que también se detectó una gran diversidad de RST entre los plásmidos IncF, aquellos detectados con mayor frecuencia, estuvieron presentes en ambas poblaciones y, no se identificó ninguna fórmula FAB destacable por su asociación a genes bla. En conclusión, el contenido plasmídico en la población de cepas clínicas es un reflejo del contenido en cepas de individuos sanos, pero hay ciertos plásmidos, que solo se detectan en cepas causantes de infección, sugiriendo una mejor adaptación a ambientes sometidos a presión selectiva. Secuenciotipos IncI1 como el ST12 pueden ser considerados plásmidos epidémicos por su alta prevalencia y frecuencia en asociación con genes blaCMY-2. En cambio, los plásmidos IncF parecen haber adquirido distintos genes de resistencia a antimicrobianos de forma aleatoria, sin ningún RST destacable por ello; sugiriendo que toda la familia de plásmidos IncF es potencialmente susceptible a adquirir y diseminar genes de resistencia.
Plasmids are extracromosomal circular DNA molecules that can replicate autonomously. They are globally described as primary promoters for the dissemination of antimicrobial resistance genes. Escherichia coli and Klebsiella pneumoniae have been described as critical propriety microorganisms due to their increasing detection as multiresistant bacteria. In these bacteria, beta-lactamases constitute one of the most disseminated resistance-providing mechanisms through plasmids. Through the study and comparison of the plasmid content in the commensal microbiota from healthy individuals and patients with bacteriemia, the aim was to determine the differences and similarities of the plasmid content between these two populations, with the purpose to shed light on the origin and evolution of bacteria-causing infection. To achieve that goal, E. coli (n=244) and K. pneumoniae (n=115) strains from 150 faecal samples from healthy individuals and 202 patients with bacteraemia where isolated. An antimicrobial susceptibility testing was performed through the disc diffusion technique, the multiresistant strains were identified and, the blaESBL, blaAmpC and blacarbapenemase genes were characterised by PCR and sequencing approaches. The plasmid study was performed by using the PBRT technique. Plasmids IncF, Incl1 and IncN plasmids, were subtyped by pMLST, to differentiate each of them within the same incompatibility group. The location of the resistance genes was performed by using the Southern blot and hybridisation techniques. The same methodology was used to generate the FAB formula of the IncF plasmids. From the clinical samples, 29.2% of the strains turned out to be multiresistant against 10.8% from healthy individuals. The prevalence of clinical ESBL-producing and AmpC-producing E. coli strains was 17.2% and 5%, respectively. The prevalence of clinical ESBL-producing, AmpC-producing and carbapenemase-producing K. pneumoniae strains was 16.5%, 1% and 1.9%, respectively. Furthermore, 4.7% of the healthy individuals were carriers of ESBL-producing E. coli and 2.7% were carriers of AmpC-producing E. coli. Both populations have suffered an increased detection of strains that produce those enzymes and, in both cases, the beta-lactamases CTX-M-15 and CMY-2 were the most frequent. The PBRT results showed how the plasmid content in both populations kept the same trend without significant differences. The exception was observed in the replicons L, M, A/C and N, which were only detected in strains from clinical samples. What is more, some of these plasmids with L or N repliclon were detected in association with blaESBL genes. The plasmid subtyping, allowed us to observe a great diversity of sequence types (ST) within the same group of incompatibility. Within the Incl1-plasmids, a huge difference between the identified ST in healthy individuals and patient strains was observed. Only ST12 and ST36 were identified in both populations of E. coli. Noticeably, all the ST12 were found in association with the blaCMY-2 gene. In contrast, even though a great diversity of RSTs was detected within the IncF plasmids, those detected at higher rates were present in both populations. Furthermore, no formula was distinguishable by its association with bla genes. In conclusion, the replicon content of clinical strains mirrored that of comensal strains. Nevertheless, there are certain plasmids only detected in infection-causing strains, suggesting a better adaptation to an enviroment subjected to selective presure. IncI1 sequencetypes such as ST12 can be considered epidemic plasmids due to their high prevalence and frequency in association with blaCMY-2. On the other hand, the IncF plasmids have acquired multiple antimicrobial resistace genes randomly, with no evidence that the persitance of a single IncF is responsible for their dissemination. Therfore, the entire IncF family of plasmids is potentially capable of acquiring and propagating resitance genes.
Habert, Benjamin. "Contrôle de la fluorescence par des nanoantennes plasmoniques." Phd thesis, Palaiseau, Institut d'optique théorique et appliquée, 2014. http://pastel.archives-ouvertes.fr/pastel-01023199.
Повний текст джерелаSchira, Romain. "Réponse optique d’agrégats d’argent : excitations plasmoniques et effets de l’environnement." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1162/document.
Повний текст джерелаOptical responses of noble metal clusters are characterized by a strong absorption in the UV-Visible range called localized surface plasmon. For clusters of several nanometers, the plasmon phenomenon can be interpreted by semi-classical or classical model, as the Mie theory, but those models can not describe the optical response of small-size clusters. The time dependent density functional theory (TDDFT) is a quantum method that allow to understand the plasmon phenomenon by reproducing the optical response of small silver cluster, made of a few tens or hundreds atoms. In this context, we performed TDDFT calculation using Range-Separated Hybrid (RSH) functionals over cluster containing between 8 and 147 silver atoms. The obtained spectra are in excellent agreement with the experimental ones and the calculated optical response allows to recover the shell model prediction. We present some tools that allow to identify and characterize plasmonic excitations within the TDDFT framework. The effect of the surrounding medium over the optical response of clusters are studied, in particular we will present a methodology that allow to reproduce spectra measured over clusters trapped in rare gas matrix. The effects of the oxidation and the effects induced by a silica matrix over the optical response of clusters are also studied
Pussard, Eric. "Etude analytique et pharmacocinétique d'amino-4 quinoléines anti-malariques : application à la mise au point de schémas posologiques utilisables dans la prévention et le traitement du paludisme à "Plasmodium falciparum"." Paris 5, 1989. http://www.theses.fr/1989PA05P612.
Повний текст джерелаRaabe, Andreas Christian. "Rôle de la phospholipase C, des phosphoinositides et du calcium dans la gamétogenèse de Plasmodium berghei, parasite du paludisme." Montpellier 2, 2008. http://www.theses.fr/2008MON20081.
Повний текст джерелаA crucial step in the life cycle of Plasmodium, the causative agent of malaria, is its transmission from vertebrate host to mosquito vector. Only sexual blood stages, termed gametocytes, are capable to develop within the mosquito. Upon ingestion by a mosquito, cues from the new environment trigger an intracellular signalling cascade within the gametocytes leading to gametogenesis, the first developmental step in the mosquito. This study aimed to further our understanding of this signalling cascade, as it plays a key role in malaria transmission. Genetic, biochemical, pharmacological, and live cell imaging approaches were employed and provide multiple lines of evidence for phospholipase C (PLC) involvement in the signalling events during male gametogenesis of Plasmodium berghei. Pharmacological evidence suggests that ryanodine receptors mediate an initial release of calcium that activates PLC. Metabolic labelling of PIP2 was used in combination with sensitive IP3 detection and allowed to deduce a timeline of PLC activity during gametogenesis. Biochemical data were confirmed by live cell microscopy of gametocytes expressing a fluorescent reporter protein binding to PIP2 and IP3, and suggest that PLC acts as calcium signal amplifier. Furthermore, we developed a new method to analyse male gametogenesis, based on radioactive labelling of newly synthesised DNA. This method provided new insight into the kinetics of DNA replication during Plasmodium gametogenesis. This assay can now be used to identify compounds that interfere with gametogenesis and potentially block malaria transmission
Cleary, Justin. "Surface Plasmon Hosts for Infrared Waveguides and Biosensors, and Plasmons in Gold-Black Nano-Structured Films." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3562.
Повний текст джерелаPh.D.
Department of Physics
Sciences
Physics PhD
Coons, Terry M. "Restriction mapping and expression of recombinant plasmids containing the arsenic resistance genes of the plasmid R45." PDXScholar, 1986. https://pdxscholar.library.pdx.edu/open_access_etds/3597.
Повний текст джерелаRawlings, Douglas Eric. "The biology, diversity and evolution of the broad host-range, promiscuous INCQ plasmids, with an emphasis on the INCQ2 sub-family." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95816.
Повний текст джерелаENGLISH ABSTRACT: Plasmids belonging to the IncQ family have an exceptionally broad host-range and are highly mobilizable in the presence of the self-transmissible IncP plasmids. All IncQ plasmids identified to date have certain features in common. The feature that distinguishes them most from all other plasmids is that they have a unique mechanism of replication. Their replicons consist of repA, repB and repC genes encoding a replicase, primase and DNA-binding proteins respectively. All IncQ plasmids contain at least three 22-bp iterons (or 20-bp iterons with 2-bp spacers) that are identical in sequence and to which the RepC DNA-binding protein binds. They replicate by means of a unique strand-displacement mechanism that is considered to place a limit on their size. Replication proceeds by a partially single-stranded intermediate that is believed to result in an increased likelihood of structural instability with an increase in plasmid size. The most compact backbone of IncQ plasmids is approximately 5.9-kb and the largest natural IncQ plasmid reported is 14.2-kb. Although the mobilization regions of IncQ plasmids are not as unique as the replicons, they are all characterized by the primase of the replicon being fused to the relaxase of the mobilization genes. The remainder of the mobilization genes may vary substantially in number and sequence between plasmids and have been subdivided into at least four distinct lineages. This dissertation consists of twenty one manuscripts published during the period 1984 to 2012. The focus is almost entirely on the IncQ plasmid subfamily known as IncQ2. Most of the earlier work was on determining the nature and extent of the replicons, mobilization genes and the toxin-antitoxin plasmid stability system. A strong theme in the latter work focussed on using the natural variation among the IncQ2 plasmids as a means to understand IncQ plasmid evolution. The collection of articles comprises a combination of original research and reviews.
AFRIKAANSE OPSOMMING: Plasmiede wat aan die IncQ familie behoort kom ‘n uitsonderlike wye gasheerselreeks voor en is hoogs mobiliseerbaar deur middel van die selfoordraagbaar IncP plasmiede. Alle IncQ plasmiedes wat tot datum identifiseer is het sekere gemeenskaplike eienskappe. Die eienskap wat hulle van alle ander plasmiedes onderskei is hul unieke dupliseringsmeganisme. Hul dupliseringsmeganisme bestaan uit repA, repB en repC gene wat onderskeidlik ‘n helikase, ‘n ‘primase’ en ‘n DNSbindingsproteïen enkodeer. Die IncQ plasmiede het ten minste drie 22-bp iterone (of 20-bp iterone met 2-bp skeidingsnukleotiede) met ‘n identiese nukleotiedvolgorde en waaraan die RepCbindingsproteïen bind. Hulle dupliseer deur middel van ‘n unieke DNA-string-vervangingsmeganisme wat ‘n beperking op hul grootte plaas. Tydens replikasie word ‘n intermediêre struktuur gevorm wat gedeeltelik enkelstring is en dit is blykbaar die rede vir ‘n verhoging in strukturële onstabilitiet as die plasmied groter word. Die kleinste ruggraat onder die IncQ plasmiede is min of meer 5.9-kb en die grootste natuurlike IncQ plasmied wat gerapporteer is, is 14.2-kb. Alhoewel die mobiliseringsgebied van die IncQ plasmiede nie so duidelik uitkenbaar as die replikons nie, hierdie gebied is gekenmerk deur ‘n ‘primase’ wat aan ‘n ‘relaxase’ in die mobiliseringsgene gekoppel is. Die oorblywende mobiliseringsgene verskil in beide getal en nukleotiedvolgorde tussen plasmiede en is gebruik om die plasmiede in vier duidelike oorsponggroepe in te deel. Hierdie proefskrif bestaan uit een-en-twintig artikels wat tussen 1984 en 2012 gepubliseer is. Die fokus is hoofsaaklik op die IncQ plasmiedsubfamilie wat as IncQ2 bekend is. Baie van die vroeër werk het oor die aard en omvang van die duplisering en mobiliseringsgene asook die toksienteentoksien plasmiedstabiliseringsmeganisme hanteer. ‘n Sterk tema in die latere werk was om die natuurlike variasie onder die IncQ2 plasmiede te bestudeer ten einde IncQ plasmiedevolusie te verstaan. Die publikasie versameling bestaan uit ‘n kombinasie van oorspronklike navorsing en oorsigartikels.
Mustfa, Kamla. "Effets des antipaludiques sur les stades hépatiques et les stades sexués (transmission) des plasmodies murines, Plasmodium yoelii." Thesis, Tours, 2011. http://www.theses.fr/2011TOUR3310/document.
Повний текст джерелаThe objective of this study is to evaluate qualitatively and quantitatively the effect of "classic" (primaquine, Malarone®, amino-4-quinoline) and "future" (artesunate, ferroquine, alone or associated) antimalarials on the liver forms and sexual stages of the parasite responsible for malaria transmission. The experimental model was : swiss mouse female infected with Plasmodium yoelii and Anophelesstephensi as the vector. The action of Malarone® (proguanil-atovaquuone) on liver stages is almost complete and more than that, incomplete, primaquine, the ferroquine or artesunate. If the previous molecules (ferroquine, artesunate), prescribed at subcurative doses, often lead to an increase in gametocytogenesis, they alter certain stages of gametocytes and statistically inhibit the formation of oocysts in the mosquito; hence, their number involve negatively in the transmission of the parasite
Chamtouri, Maha. "Etude exhaustive de la sensibilité des Biopuces plasmoniques structurées intégrant un réseau rectangulaire 1D : effet de la transition des plasmons localisés vers les plasmons propagatifs." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112060/document.
Повний текст джерелаSurface plasmons resonance imaging with continuous thin metallic films have become a central tool for the study of biomolecular interactions. However, in order to extend the field of applications of surface plasmons resonance systems to the trace detection of biomolecules having low molecular weight, a change in the plasmonic sensing methodology is needed. In this study, we investigate theoretically and experimentally the sensing potential of 2D nano- and micro- ribbon grating structuration on the surface of Kretschmann-based surface plasmon resonance biosensors when they are used for detection of biomolecular binding events. Numerical simulations were carried out by employing a fast and novel model based on the hybridization of two classical methods, the Fourier Modal Method and the Finite Element Method. Our calculations confirm the importance of light manipulation by means of structuration of the plasmonic thin film surfaces on the nano- and micro- scales. Not only does it highlight the geometric parameters that allow the sensitivity enhancement, and associated figures of merit, compared with the response of the conventional surface plasmon resonance biosensor based on a flat surface, but it also describes the transition from the regime where the propagating surface plasmon mode dominates to the regime where the localized surface plasmon mode dominates. An exhaustive mapping of the biosensing potential of the nano- and micro- structured biosensors surface is presented, varying the structural parameters related to the ribbon grating dimensions. New figures of merit are introduced to evaluate the performance of the structured biosensors. The structuration also leads to the creation of regions on biosensor chips that are characterized by strongly enhanced electromagnetic fields. New opportunities for further improving the bio-sensitivity are offered if localization of biomolecules can be carried out in these regions of high electromagnetic fields enhancement and confined
Gransagne, Marion. "Etude fonctionnelle et structurale de protéines impliquées dans l'invasion des cellules hépatocytaires par les sporozoïtes de Plasmodium." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066616/document.
Повний текст джерелаDuring my thesis, I was interested in the study of the hepatocyte invasion by Plasmodium. Several cellular receptors are involved, such as CD81 and SRB1, but the parasitic factors required were unknown until now. I tested different parasitic factors thanks to an invasion test of HepG2 or HepG2/CD81 cells with parasites complemented with different proteins. Following the identification of the 6 cystein protein P36 as a determinants of the entry pathway, I studied the structural determinants of this protein which are involved in the hepatocytes’ entry pathway. To this end, I complemented parasites knock-out for P36 with chimeric proteins constituted of domains of a parasite using both CD81 and SRB1, and domains from a parasite using only CD81. I showed that the second 6 cystein domain of P36 is decisive in the entry pathway choice.In order to study the P36 interactions with potential cellular receptors, I developed a production protocol of this protein in bacteria. I used the recombinant protein to test the interactions (ELISA and SPR) with potential receptors: CD81, SRB1, CD36, LIMP2, Epha2. Unfortunately, no interaction has been detected. Antibodies are in production, in order to test whether they are capable to block the hepatocyte invasion by Plasmodium. They will also be used to localize the protein in the parasite. In the end, I studied the polymorphisms of P36 in human parasites
Biarnais, Tiphaine. "Modifications de la schizogonie et de la gamétocytémie en réponse à la chloroquine chez certains Plasmodium de Muridés." Tours, 2002. http://www.theses.fr/2002TOUR3303.
Повний текст джерелаDurach, Maxim. "Giant Plasmonic Energy and Momentum Transfer on the Nanoscale." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/phy_astr_diss/42.
Повний текст джерелаGill, Santokh Singh Carleton University Dissertation Biology. "IncN group plasmids and plasmid regions determining the killing of Klebsiella pneumoniae and of immunity to killing." Ottawa, 1985.
Знайти повний текст джерелаWilliamson, Phillip C. "A Novel Mechanism for Site-Directed Mutagenesis of Large Catabolic Plasmids Using Natural Transformation." Thesis, University of North Texas, 2001. https://digital.library.unt.edu/ark:/67531/metadc2828/.
Повний текст джерелаVemuri, Padma Rekha. "Surface Plasmon Based Nanophotonic Optical Emitters." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc5584/.
Повний текст джерелаBiesso, Arianna. "Plasmonic field effects on the spectroscopic and photobiological function of the photosynthetic system of bacteriorhodopsin." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28162.
Повний текст джерелаCommittee Chair: Mostafa A. El-Sayed; Committee Member: Adegboyega K. Oyelere; Committee Member: Bridgette Barry; Committee Member: Joseph W. Perry; Committee Member: Mark R. Prausnitz.
Hajebifard, Akram. "Plasmonic Nano-Resonators and Fano Resonances for Sensing Applications." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/41616.
Повний текст джерелаGoffard, Julie. "Etude du couplage entre des nanocristaux de silicium et des plasmons de surface localisés." Thesis, Troyes, 2014. http://www.theses.fr/2014TROY0012/document.
Повний текст джерелаThe discovery of photoluminescence of nanometric silicon paves the way to use silicon in optoelectronic devices. However this photoluminescence remains low and a lot of works aim at improving silicon optical properties. In this dissertation we study localized surface plasmons to improve optical properties of silicon nanocrystals. Thanks to the control of all geometrical parameters of silicon nanocrystals and metallic nanoparticles during the fabrication process, the coupling process between these two objects has been studied. The modification of silicon nanocrystals emission as a function of the distance, the size and the nature of metallic nanoparticles has been investigated. Thanks to the development of experimental optical characterization techniques we showed that silicon nanocrystals photoluminescence is modified both spectrally and spatially by localized surface plasmons. This work shows that it’s possible to enhance silicon’s optical properties and thus to devise optoelectronic devices with silicon and plasmons
Scheffler, Christopher M. "Localized Photoemission in Triangular Gold Antennas." Thesis, Portland State University, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13808008.
Повний текст джерелаWith the development of ultra-fast laser technology, several new imaging techniques have pushed optical resolution past the diffraction limit for traditional light-based optics. Advancements in lithography have enabled the straightforward creation of micron- and nanometer-sized optical devices. Exposing metal-dielectric structures to light can result in surface plasmon excitation and propagation along the transition interface, creating a surface plasmon polariton (SPP) response. Varying the materials or geometry of the structures, the plasmonic response can be tailored for a wide range of applications.
Photoemission electron microscopy (PEEM) has been used to image excitations in micron-sized plasmonic devices. With PEEM, optical responses can be characterized in detail, aiding in the development of new types of plasmonic structures and their applications. We show here that in thin, triangular gold platelets SPPs can be excited and concentrated within specific regions of the material (thickness ~50 nm); resulting in localized photoemission in areas of high electric field intensity. In this regard, the platelets behave as receiver antennas by converting the incident light into localized excitations in specific regions of the gold platelets. The excited areas can be significantly smaller than the wavelength of the incident light (λ ≤ 1 µm). By varying the wavelength of the light, the brightness of the excited spots can be changed and by varying the polarization of the light, the brightness and position can be changed, effectively switching the photoemission on or off for a specific region within the triangular gold structure.
In this work, the spatial distribution of surface plasmons and the imaging results from photoemission electron microscopy are reproduced in simulation using finite element analysis (FEA). In addition, we show that electromagnetic theory and simulation enable a detailed and quantitative analysis of the excited SPP modes, an explanation of the overall optical responses seen in PEEM images, and prediction of new results.
Hettiarachchige, Chamanei Sandamali P. "The interaction of quantum dots with plasmons supported by metal waveguides." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/92278/1/Chamanei%20Sandamali_Hettiarachchige_Thesis.pdf.
Повний текст джерелаLiu, Zhe. "New supported metal photocatalysts for synthesis of fine organic chemicals driven by visible light." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/95889/1/Zhe%20Liu%20Thesis.pdf.
Повний текст джерела