Дисертації з теми "Venin – Analyse"
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Ruyssen, Sylvie. "Structures et synthèses des alcaloi͏̈des des fourmis du genre "Solenopsis"." Paris 5, 1991. http://www.theses.fr/1991PA05P072.
Lebrun, Bruno. "Etude de toxines alcaloi͏̈diquesd'arthropodes : étude physico-chimique et toxicologique du venin des myriapodes du genre Glomeris et analyse électrophysiologique du mécanisme d'action d'un dérivé synthétique d'alcaloi͏̈des présents dans le venin des fourmis du genre Monomorium." Aix-Marseille 1, 1994. http://www.theses.fr/1994AIX11081.
Radvanyi, François. "Mode d'action possible de la crotoxine, une neurotoxine présynaptique à activité phospholipase A2." Paris 6, 1987. http://www.theses.fr/1987PA066197.
Le, Gall Frédéric. "De la stratégie d'envenimation de Conus consor et de Conus ermineus à la caractérisation biochimique et électrophysiologique de deux toxines de leur venin : des peptides spécifiques des canaux sodium neuronaux." La Rochelle, 1998. http://www.theses.fr/1998LAROS031.
Favreau, Philippe. "Etudes physico-chimique et pharmacologique de nouvelles toxines isolées du venin du cône piscivore Conus Consors." La Rochelle, 1999. http://www.theses.fr/1999LAROS034.
Maillère, Bernard. "Étude de la présentation aux lymphocytes T murins d'une protéine riche en ponts disulfure : le cas d'une neurotoxine de venin de serpent." Paris, Institut national d'agronomie de Paris Grignon, 1992. http://www.theses.fr/1992INAPA001.
Rifflet, Aline. "Etude toxinologique du venin de fourmis exotiques : identification et caractérisation d’un peptide antimicrobien." Thesis, Montpellier 1, 2012. http://www.theses.fr/2012MON13509/document.
Animal venoms, by their biochemical richness and diversity of molecular targets, are a highly significant source of new molecules, with numerous potential applications. A major thrust of present pharmacological research now concerns drugs to replace certain antibiotics, proven ineffective due to the appearance of resistant strains. And discoveries of animal toxins over the past 40 years or more, have shown that venomous species could be the « pharmacists of the future », with only a few species of ants' venoms having been studied, but each time resulting in the description of original toxins. The aim of this thesis has been to study the venom of tropical ants using a multidisciplinary approach combining biochemical analysis and toxinology, centred on two main areas: (1) Research into their biological activity on insects and bacteria; (2) Fractionation of venoms using separative techniques, plus biochemical analysis of the peptides isolated using mass spectrometry. Two species of ant have been chosen based on their lifestyles: Crematogaster striatula is arboricolous and Tetramorium bicarinatum, terricolous, and the different biological activities of their crude venoms have been investigated using the MTT test. The Dufour liquid of C. striatula, in addition to its ability to scare away competitors, can definitively paralyse termites. For the venom of T. bicarinatum, two peptides have been isolated, and identified using mass spectrometry. Bicarinalin, a short 20 amino acid residues C-terminally amidated peptide, was notable for its wide spectrum antibacterial activity which, when tested on two Staphylococcus strains, proved to be at least if not more potent than mellitin, the antimicrobial peptide from bee venom. Bicarinalin would thus appear to be a good candidate for the development of new antibiotic drugs
Nguyen, Bao. "Étude et analyse de conopeptides de venins issus de cônes malacophages du Vietnam." Paris, Muséum national d'histoire naturelle, 2014. http://www.theses.fr/2014MNHN0016.
Cone snail venoms (family Conidae) are a rich source of small bioactive peptides (conotoxins or conopeptides). In this thesis, we compared the venom of the two molluscivorous snails Conus bandanus and Conus marmoreus. Using nano-LC ESI MS and MS/MS we demonstrate the presence of 92 common peptides, representing 24,4% (out of 376 peptides) and 18,4% (out of 499 peptides) component in venoms of C. Bandanus and C. Marmoreus, respectively. The overall estimation of conopeptide disulphide bridges reveals 75% and 61% of disulphide-rich peptides in C. Bandanus and C. Marmoreus venom components, respectively. The same amino acid sequences were found for a number of peptides in the two species, which also show differences in the expression of other conopeptides. We also have isolated, purified and characterized novel conotoxins from C. Bandanus venom such as the -BnIA/B/C/D (A-superfamily), the BnIIIA/B/C/D/E (M-superfamily), BnVA (T-superfamily) and BnVIA (H-superfamily)
Leung, Kar Wah. "Ginseng pharmacology : signaling pathways of ginsenoside-Rg1 in human umbilical vein endothelial cells." HKBU Institutional Repository, 2006. http://repository.hkbu.edu.hk/etd_ra/766.
Boisvert, Étienne. "Îlots boisés en terre de grande culture : relictualité et biodiversité, l’exemple du Vexin français. Essai de biogéographie historique." Thesis, Paris 4, 2010. http://www.theses.fr/2010PA040147.
The purpose is to distinguish the relictual forest islands from the recent ones in an agricultural matrix; to inventory and characterize them and to assess their biodiversity, and eventually to develop a model. The method combines the resort to archives and aerial photographs with field studies (1996-2007). The mapping approach has been based on regression analysis (2004-1620). The time threshold has made it possible to identify 152 woodlots (<50ha) which presence was attested before 1620. The regression analysis to map the wood patches has been based on the path network, which is a fixed and structuring element of the landscape. There is a strong relation between the location of the relictual forest islands, the antique tracks and the medieval paths. The characterization and assessment of the relictual forest islands biodiversity have been carried out following a time and space pluri-scalar approach and from a comparison with recent forest islands. The analysis was based on the shapeless canopy, the texture and dynamics of the forest cover, the cuttings, the edges and the internal forest path network. The analysis of the internal structure focuses on the taxonomic diversity and the ecological diversity of the plant species and the indicator bird species. These analyses have stressed the specificity of the relictual forest islands, a model of which has been developed. They are either fragment of ancient forests, or, in most cases, secondary but old forest forms from the Gallo-Roman, Merovingian or medieval time
Horner, Daniel. "Isolated distal deep vein thrombosis in symptomatic ambulatory patients : a prospective data analysis and therapeutic feasibility study." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/isolated-distal-deep-vein-thrombosis-in-symptomatic-ambulatory-patients-a-prospective-data-analysis-and-therapeutic-feasibility-study(02979c49-ec26-4099-b0f8-3da2acbf0672).html.
Paul, Timir, Samit Bhatheja, Hemang Panchal, Shimin Zheng, Subhash Banerjee, Sunil V. Raso, Luis Guzman, et al. "Outcomes of Saphenous Vein Graft Intervention With and Without Embolic Protection Device: A Comprehensive Review and Meta-Analysis." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etsu-works/2771.
Trépanier, Marie-Laurence. "Les performances du langage dans "La fabrique de cérémonies" et "L'ombre des choses à venir" de Kossi Efoui." Master's thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/29474.
Lam, In Kei. "Anti-angiogenic activities of flavonoids from Pericarpium Citri Reticulatae on human umbilical vein endothelial cells (HUVECs) and zebrafish." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2447360.
Venn, Ronald [Verfasser], and Nicola [Akademischer Betreuer] Berg. "Partnering for Sustainable Value Creation : Conceptual and Empirical Analyses of Co-Creation in Cross-sector Social Partnerships at the Base of the economic Pyramid / Ronald Venn. Betreuer: Nicola Berg." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2015. http://d-nb.info/1078408955/34.
Watanabe, Yuji, Gerhard P. Püschel, Andreas Gardemann, and Kurt Jungermann. "Presinusoidal and proximal intrasinusoidal confluence of hepatic artery and portal vein in rat liver : functional evidence by orthograde and retrograde bivascular perfusion." Universität Potsdam, 1994. http://opus.kobv.de/ubp/volltexte/2008/1670/.
Dressel, Bárbara. "Analyse structurale, pétrologique et métallogénique de la minéralisation aurifère néoprotérozoïque du Granite de Passa Três, Campo Largo – PR, Sud du Brésil : implications sur les relations granite/minéralisation." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTG023.
The Passa Três Granite is situated in southern Brazil (Paraná State) and presents a NNE-SSW elongated shape. This intrusion is emplaced within metapelites of the Mesoproterozoic Açungui Group (Ribeira Belt, Mantiqueira Province), between the N40E trending Morro Agudo and Lancinha faults. Gold mineralisation is composed of centimetric to metric quartz veins with fluorite, sulphides and carbonates. The main objectives of this work are i) to understand the model of formation of the mineralised veins systems taking into account the relationships between magmatism, hydrothermalism, deformation and mineralogy in space and time; ii) the characterization of the nature, source and emplacement conditions of the ore fluids; and iii) the characterization of a metallogenic model for this singular deposit. In order to reach these purposes, the methods to be applied include, beyond the structural geology and field works: petrography, U-Pb zircon (LA-ICP-MS) and 40Ar-39Ar muscovite geochronology, scanning electron microscopy (SEM), electron-microprobe analyses (EPMA), X-ray fluorescence (XRF), isotopic analysis of sulphur (δ34S), and microthermometric and Raman analysis of fluid inclusions. Structural data showed the coexistence of two major normal mineralised vein systems, one N-S and the other one E-W, with dips of 60-75ºW and 45-70ºS, respectively. Both systems are interpreted to be contemporaneous and conjugated. Orebodies form sigmoidal geometries that resulted of the opening of pull-aparts as a consequence of the normal movements along low-angle fault planes. High-angle dip of the global mineralised structures is explained by the succession of the pull-aparts. Four mineralogical stages resulted in the formation of the mineralised system: phase 1 [quartz 1 + fluorite], phase 2a [quartz 2 + pyrite 2a ± gold ± chalcopyrite ± aikinite ± fluorite ± sphalerite ± muscovite], phase 2b [quartz 2 + pyrite 2b + gold + chalcopyrite + aikinite + ankerite ± sphalerite ± fluorite ± muscovite] and phase 3 [quartz 3 + ankerite + calcite + molybdenite ± aikinite ± muscovite ± fluorite]. Gold occurs as invisible gold and as native grains within fractures that affect pyrite 2a and 2b, commonly associated with chalcopyrite and aikinite. Alteration related to the mineralisation includes muscovite/quartz/pyrite (greisen type alteration) and sericite/carbonato/clinochlore (phyllic alteration) assemblages. The δ34S values of pyrite crystals (from -0.1‰ to 1.1‰) indicate that the sulphur in this deposit may have a magmatic origin. This hypothesis agrees with the systematic observation, within the upper part of the granite (drill holes and superior levels of the mine), of structures typical of magmatic-hydrothermal transition such as aplite-pegmatite systems, quartz veins with K-feldspar border, quartz concentration of stockscheider type and unilateral solidification textures (UST). Geochronological data confirm this hypothesis with U-Pb zircon ages (611.9±4.7 and 611.9±5.6 Ma for medium grained granite facies (GEM) and microgranite (GEF), respectively) and 40Ar-39Ar muscovite dating (veins with K-feldspar border: 612.9±2 to 608.8±2 Ma; mineralised veins: 611.7±2 to 608.8±2 Ma; barren vein: 608.4±2 Ma), that are very close. These ages indicate that the granite emplacement, the magmatic-hydrothermal fluid release and the formation of gold-bearing quartz veins occur during a time lapse of approximately 5 Ma, between 613 and 608 Ma. The mineralisation (611 to 608 Ma) coeval to granite crystallization (612 to 610 Ma), the association of gold with Bi minerals (aikinite), the strong structural control for veins and magmatic-hydrothermal transition features at the roof of a small granitic intrusion suggest that the Passa Três gold deposit shares several similarities with intrusion-related gold deposits
Borin, Thaiz Ferraz. "Aumento da IL-1beta no processo de arterialização de enxertos venosos utilizando modelos ex vivo, in vitro e in vivo." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/5/5131/tde-29012009-132853/.
The vein graft is subjected to increased tensile stress and the complex adaptive vein response to the arterial hemodynamic condition may predispose to bypass failure in some individuals. The understanding of molecular changes underlying this process may be useful for the development of novel therapeutical interventions to increase the vein graft patency. In this work, we investigated the early effect of arterialization on the expression of IL-1beta gene in human saphenous vein and the time-course regulation in rat arterialization model. IL-1beta is upregulated in early stage of human saphenous vein arterialization in vivo and ex vivo. This increase is also observed in arterialized rat jugular vein which showed IL-1beta expression 12 times higher on day 1 compared to normal jugular vein. Later, the IL-1beta levels decreases and maintain the level about twice above normal jugular vein. Moreover, it is observed gradual reduction of smooth muscle cells (SMC), which almost disappeared on the 3rd day after surgery. Apoptosis, which is markedly increased on the 1st day, appears to be an important event during this process. At the 7th day, cellular density and SMC proliferation gradually increased till the 90th day. There was a gradual thickening of the medial layer and formation of neointima with deposition of SMC in the subendotelial layer from day 7 on. Initially the medial layer appeared disorganized, day 7 to 14, then by day 28 it became more organized and the presence of an intimal layer with SMCs was evident. The neointimal layer increased gradually from day 7 on. These results provide evidence that the modulation of IL-1beta activity may be an interesting target to be explored I the future to increase the vein graft patency. Altogether, we demonstrate that the model of arterialization of venous segment in rat reproduces several of the morphological changes described in the venous graft disease in humans and thus will be useful in characterization of candidate genes involved in this process and testing them as a potential therapeutic targets. The IL-1beta expression is increased after 1 day of arterialization of vein segment in vivo and ex vivo and shall be an interesting target to be tested to influence the adaptation of venous grafts for therapeutic purpose
Wiberg, Steen Tobias. "Genetic relationships and origin of the Ädelfors gold deposits in Southeastern Sweden." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67912.
Ädelfors ligger ca 17 km öster om Vetlanda, Jönköpings län, i det N-S strykande Transskandinaviska granit och porfyrbältet och är en del av det NÖ-SV strykande 1,83-1,82 Ga Oskarshamn-Jönköpingsbältet (OJB) bildad i en kontinental subduktionszon i kanten av den Svecofenniska kontinentalplattan. I denna kontinentalbåge ligger Vetlanda supergruppen som är en metasedimentär del av OJB bestående av starkt folierad 1,83 Ga metagråvacka, metasandsten och metakonglomerat med inlagringar av mafiska och felsiska vulkaniter. Ädelfors gruvfält består utav ca. 330 kvartsgångar förande mestadels guld men också koppar. Järnmineraliseringar i form av bandad järnmalm finns också i området. Geologin, mineralogin och pyritens kemiska sammansättning från järngruvorna Nilssons järngruva (NFE) och Fe-gruvan (FE), koppargruvan Kamelen (KM) och guldgruvorna Brånadsgruvan (BR), Adolf Fredriks gruva (AF), Gamla Krongruvan (GKR), Gamla Kolhagsgruvan (GKO), Thörngruvan (TH), Nya Galongruvan (NG), Stenborgs gruva (ST), Tyskgruvan (TG), Hällaskallen (HS) och Fridhem (FR) har undersökts för att finna eventuella genetiska likheter. Svavelisotopförhållande har fastställts för pyrit från AF, FE och KM. Strukturellt kan gångarna delas in i ett antal grupper. AF, GKR, ST, NG, TH och möjligtvis NFE stryker 10-70° och stupar 55-70°. BR, GKO och KM stryker 110-140° och stupar 80-90° medan TG och HS stryker 90-110° och stupar 85°. Fridhem stryker 70° och stupar 80°. En klorit-kvarts-sericit-biotitrik metapelit utgör värdbergarten i alla gruvor förutom; FR där den utgörs av en beresitiserad felsisk vulkanit rik på plagioklas, sericit, biotit och kvarts med disseminerad pyrit; och NFE, HS, NG vilka har en mafisk tuffitisk moderbergart. Kvartsgångarna är mjölkvita med undantag för FE:s svarta, pyritförande kvarts vilket uppträder som sprickfyllnad i den bandade järnmalmen och är senare bildad. Kvartsen i KM är starkt dynamiskt omkristalliserad. Svag till måttlig foliation är vanlig i sidoberget med undantag av stark foliation i TG och NFE, vilka är lokaliserade i förkastningssprickor med stark kloritförskiffring av värdbergarten. Klorit-, zeolit-, karbonat-, hematit-, amfibol-, kalifältspat-, sericit-, biotit- och epidotomvandling förekommer i majoriteten av lokalerna. Malmmineralen är dominerande sprött deformerad subhedral till euhedral pyrit som kataklastiska aggregat eller band, interstitiell kopparkis i pyrit, markasit, magnetkis, guld och sporadiskt kopparkissjuk zinkblände och arsenikkis. I det här arbetet har även tetradymit, staurolit, blyglans och Ce-monazit observerats. Bismutinit och tetradymit i form av inneslutningar i pyrit observerades i AF, GKR, FR och TG. Guld observerades i AF, BR, GKR och TG som inneslutningar i pyrit eller fritt i kvarts med Au/Ag medianvärde på 78,41, avvikande är HS med värden mellan 4,66-5,25. Förhållanden mellan spårelement i pyrit indikerar två typer av pyrit. Typ 1 funnen i FE och KM har följande värden: Co/Ni = 10,94, Bi/Au = 1,79, Bi/S = 0,037, Au/Ag = 11,13, S/Se = 235,96 och As/S = 0,006. Typ 2 funnen i NG, GKO, ST, TH, AF, NFE, HS, GKR, BR, FR, TG och som sliror i KM4 py1 har följande värden Co/Ni = 5,26, Bi/Au = 1,95, Bi/S = 0,031, Au/Ag = 4,19, S/Se = 0 and As/S = 0. δ34S värden styrker denna uppdelning där KM och FE har värdena 1,3-2,6 ‰ och AF 3,6-3,8 ‰. Den geologiska utvecklingen av fältet har tolkats som följande: FE-gruvans bandade järnmalm är den tidigaste mineraliseringen vilket följs utav uppsprickning och läkning av kvarts med pyrit typ 1 som också bildar kopparmineraliseringen KM. Senare sprickzoner efter Smålandsgraniternas intrusion läks av kvarts med pyrit typ 2 på mesozonalt djup vilket bildar NG, GKO, ST, TH, AF, NFE, GKR, BR, FR, TG och omkristalliserar och introducerar nya pyritsliror i kvartsen i KM. HS bildas möjligtvis sist eller har blivit omvandlad eftersom den är anrikad på silver. Morfologi, omvandlingar och svavelisotop-signaturer tyder på ett orogent ursprung för Ädelfors guldrika kvartsådror samt den kopparrika kvartsådern i KM.
Wu, Chia-Ying, and 吳佳穎. "Molecular interactions among Rep protein and genomic DNA of ageratum yellow vein virus Ping-Tung strain and analyses of replication in prokaryotic system." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/47536085080349520695.
國立中興大學
農業生物科技學研究所
90
Abstract The replication ability is one of the key determinants for surviving of viruses. The Rep protein, the first expressed by geminiviruses during the early infection stage, is the only virus-encoded protein required for the replication process, including specific cleavage and ligation to initiate and terminate rolling-circle replication, self-interaction, and regulation of the host cell cycles. In this research, the monopartite begomovirus, ageratum yellow vein virus Ping-Tung strain (AYVV-PT) was used to investigate the interactions between Rep proteins and viral DNAs and to develop the prokaryotic replication system based on E.coli/phage M13 to facilitate the study of geminivirus replication. The Rep gene of AYVV-PT was cloned into plasmid pETBlue for expression, and gel-purified Rep proteins were used for producing specific polyclonal antibodies. The Rep gene was further sub-cloned into plasmid pGEX-4T-1 to obtain Rep proteins in native condition by affinity chromatography. The interactions between Rep proteins and viral genomic DNAs were investigated by Nucleoprotein Binding-ELISA (NB-ELISA) and Southwestern blot analyses. Rep protein has the highest affinity to nt. 1522-2731 of AYVV-PT genome under the optimized in vitro binding condition, 20 mM Tris-HCl buffer, pH 7.4 containing 0.4-0.6 % NaCl. The full-length AYVV-PT genome was cloned into phage M13 as a single unit, and specific Digoxygenin-labeled RNA and DNA probes for AYVV-PT were prepared by in vitro transcription and asymmetric PCR. The signals of small DNAs co-migrating with the single-stranded, circular DNAs encpasidated in virus particles were detected by Southern blot analysis, and the accumulation of the small DNAs was revealed by time course analysis. In addition, the small DNAs were further confirmed as single-stranded, circular DNA of AYVV-PT by RNase A, S1 nuclease digestions and PCR followed by nucleotide sequence analysis. The results suggested that the prokaryotic replication machinery of E.coli/phage M13 could support the generation of single-stranded, circular DNA of AYVV-PT in a construct containing only one copy of replication origin and a single unit viral genome. The E.coli/phage M13 system may facilitate the study of geminivirus replication and the development of convenient infection and foreign gene expression systems.
Brass, Margaret Mary. "Biomechanical and morphological characterization of common iliac vein remodeling: Effects of venous reflux and hypertension." Thesis, 2014. http://hdl.handle.net/1805/5278.
The passive properties of the venous wall are important in the development of venous pathology. Increase in venous pressure due to retrograde flow (reflux) and obstruction of venous flow by intrinsic and extrinsic means are the two possible mechanisms for venous hypertension. Reflux is the prevailing theory in the etiology of venous insufficiency. The objective of this thesis is to quantify the passive biomechanical response and structural remodeling of veins subjected to chronic venous reflux and hypertension. To investigate the effects of venous reflux on venous mechanics, the tricuspid valve was injured chronically in canines by disrupting the chordae tendineae. The conventional inflation-extension protocol in conjunction with intravascular ultrasound (IVUS) was utilized to investigate the passive biomechanical response of both control common iliac veins (from 9 dogs) and common iliac veins subjected to chronic venous reflux and hypertension (from 9 dogs). The change in thickness and constituent composition as a result of chronic venous reflux and hypertension was quantified using multiphoton microscopy (MPM) and histological evaluation. Biomechanical results indicate that the veins stiffened and became less compliant when exposed to eight weeks of chronic venous reflux and hypertension. The mechanical stiffening was found to be a result of a significant increase in wall thickness (p < 0.05) and a significant increase in the collagen to elastin ratio (p < 0.05). After eight weeks of chronic reflux, the circumferential Cauchy stress significantly reduced (p < 0.05) due to wall thickening, but was not restored to control levels. This provided a useful model for development and further analysis of chronic venous insufficiency and assessment of possible intervention strategies.
Ramaniuk, Volha. "Růst Mycobacterium smegmatis na agarovém médiu a agarovém médiu pokrytém celofánovou folií - morfologická a proteomová studie." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-305796.