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Dissertations / Theses on the topic 'Sols suppressifs'

Author: Grafiati

Published: 20 July 2024

Last updated: 31 July 2025

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1

Simon, Lena. "Le microbiome du sol : contrôle de Fusarium graminearum et transmission à l'environnement racinaire du blé sous l'effet de déterminants environnementaux et agronomiques." Electronic Thesis or Diss., Université Clermont Auvergne (2021-...), 2024. http://www.theses.fr/2024UCFA0027.

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La réduction de l'utilisation des produits phytosanitaires constitue l'un des axes majeurs de la transition agroécologique. Dans ce contexte, il est urgent de développer des stratégies assurant une gestion efficace et durable de la pression parasitaire, tout en préservant l'environnement. La mobilisation du microbiome du sol, et notamment des communautés de bactéries qui le composent, représente une de ces solutions. S'il a été démontré qu'une partie de ces communautés était capable de limiter l'impact de pathogènes des cultures, les relations entre l'environnement de ce microbiome et sa capac

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2

Almario, Juliana. "Relation entre la propriété phytoprotectrice de synthèse de 2,4-diacétylphloroglucinol par les Pseudomonas fluorescents dans la rhizosphère, et la résistance des sols à la maladie de la pourriture noire des racines de tabac." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10337/document.

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Les bactéries du sol produisant des antifongiques comme le 2,4-diacétylphloroglucinol(DAPG) protègent les racines des plantes vis-à-vis des champignons phytopathogènes. Néanmoins, les conditions de fonctionnement de ces populations bactériennes dans le sol restent très mal connues. Dans certains sols, dits résistants aux maladies, ces bactéries phytoprotectrices sont présentes à des effectifs importants et leur activité est suffisante pour protéger la plante malgré la présence du pathogène. L'objectif de cette thèse a été de comprendre la relation entre la résistance des sols à la maladie de l

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3

Meagher, Patricia. "The influence of peat and peat-substitute potting mix components on disease suppression, with particular reference to changes with time." Electronic version, 2008. http://epress.lib.uts.edu.au/dspace/handle/2100/553.

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4

Ghahremani, Zahra. "Biological control approaches of Meloidogyne spp. in vegetable crops : from application of selected antagonists to suppressive soils." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/673047.

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Root-knot nematodes (RKN), Meloidogyne spp., are the most economically important genus of plant parasitic nematodes that cause considerable damage and yield losses of horticultural crops worldwide. RKN management strategies tend to reduce chemical nematicides by encouraging alternative control methods like the use of plants bearing resistance genes (R-genes) and/or by microbe-inducing plant resistance, and the antagonistic potential of soils. In the thesis, two biological control approaches of Meloidogyne spp. were evaluated: 1) the application of selected nematode antagonists, the fungus Poch

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5

Steddon, Simon John. "The role of cytokines and the suppressors of cytokine signalling (SOCS) in human osteoblastic cell survival and bone remodelling." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8634.

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A number of growth factors and cytokines involved in the local regulation of bone remodelling are either synthesised by osteoblasts or have osteoblasts as their target. These include the RANK-L/OPG system, the gp130 cytokine family, including IL-6, and insulin like growth factors. In addition, aberrant cytokine signalling is strongly linked with pathological states characterised by increased bone resorption, including osteoporosis and renal osteodystrophy. The range of action and potency of these osteotropic cytokines requires that their actions are tightly regulated. Amongst such potential co

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6

Lainà, Rosetta. "Some effects of air-filled porosity on the suppression of damping-off of seedlings by pythium ultimatum in compost amended potting media /." [Campbelltown, N.S.W. : The author], 1997. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030709.141536/index.html.

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7

Silva, José Augusto Ignácio da. "Supressão robusta de ressonância de solo em helicóptero considerando incertezas estruturais, falha de atuador e não-linearidades concentradas /." Ilha Solteira, 2019. http://hdl.handle.net/11449/183184.

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Orientador: Gustavo Luiz Chagas Manhães de Abreu<br>Resumo: O presente trabalho propõe uma nova estratégia para supressão ativa robusta do fenômeno Ground Resonance (GR) em Helicópteros. O modelo clássico de análise deste fenômeno é desenvolvido para um rotor isotrópico e a análise de estabilidade é feita no domínio de Coleman, para encontrar as fronteiras de instabilidade. Também é proposta uma nova estratégia para lidar com essas fronteiras de instabilidade e suprimir o GR usando controladores com formulação descrita por conjuntos politópicos convexos. Controladores são projetados via desigu

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8

Kyrgyzova, Khrystyna. "Stéréophotométrie non-calibrée de surfaces non-Lambertiennes. Application à la reconstruction de surface de colonies microbiennes." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01063285.

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La thèse est dédiée au problème de la stéréophotométrie non-Lambertienne sans connaissance a priori sur les conditions d'illumination et son application aux images de boîte de Pétri. Pour obtenir une bonne reconstruction de surfaces non-Lambertiennes, il est proposé de traiter une séquence d'entrée en deux étapes: premièrement il faut supprimer les effets spéculaires et obtenir ainsi des images de surface 'pseudo-Lambertienne'. Ensuite dans une deuxième étape à partir de ces images une reconstruction stéréophotométrique Lambertienne sans aucune information préalable sur les directions d'illumi

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9

Chng, Soon Fang. "Microbial factors associated with the natural suppression of take-all in wheat in New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Lincoln University, Canterbury, New Zealand /." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/863.

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Take-all, caused by the soilborne fungus, Gaeumannomyces graminis var. tritici (Ggt), is an important root disease of wheat that can be reduced by take-all decline (TAD) in successive wheat crops, due to general and/or specific suppression. A study of 112 New Zealand wheat soils in 2003 had shown that Ggt DNA concentrations (analysed using real-time PCR) increased with successive years of wheat crops (1-3 y) and generally reflected take-all severity in subsequent crops. However, some wheat soils with high Ggt DNA concentrations had low take-all, suggesting presence of TAD. This study investiga

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10

Keen, Bradley Paul, University of Western Sydney, College of Health and Science, and School of Natural Sciences. "Microbial ecology of phytophthora cinnamomi suppressive soils : a study of biological suppression of P. cinnamomi in sub-tropical avocado orchards on the east coast of Australia." 2006. http://handle.uws.edu.au:8081/1959.7/16038.

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This study focuses on the soil- and water-borne plant pathogen Phytophthora cinnamomi Rands and the phenomenon of P. cinnamomi suppressive soil. In particular, this thesis reports on the outcome of field surveys and glasshouse assays undertaken to locate P. cinnamomi suppressive soils and to confirm the involvement of biological processes in suppression. The potential role of cellulase and laminarinase in suppression was investigated and a molecular technique known as length heterogeneity PCR (LH-PCR) was used to analyse the structure and diversity of bacterial and fungal communities in avocad

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11

Keen, Bradley Paul. "Microbial ecology of phytophthora cinnamomi suppressive soils : a study of biological suppression of P. cinnamomi in sub-tropical avocado orchards on the east coast of Australia." Thesis, 2006. http://handle.uws.edu.au:8081/1959.7/16038.

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This study focuses on the soil- and water-borne plant pathogen Phytophthora cinnamomi Rands and the phenomenon of P. cinnamomi suppressive soil. In particular, this thesis reports on the outcome of field surveys and glasshouse assays undertaken to locate P. cinnamomi suppressive soils and to confirm the involvement of biological processes in suppression. The potential role of cellulase and laminarinase in suppression was investigated and a molecular technique known as length heterogeneity PCR (LH-PCR) was used to analyse the structure and diversity of bacterial and fungal communities in avocad

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12

Zhu, Hui-E., and 朱慧娥. "Studies on the soils suppressive to Rhizoctonia solani." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/75619070271055567847.

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13

Lin, Pei-Jung, and 林沛蓉. "Detection and Suppression of Standby-Mode Current in SOCs." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ctgr8h.

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碩士<br>國立東華大學<br>電機工程學系<br>107<br>Due to the development trend of IC manufacturing technology, the scaling of wafer process is reduced. In addition, the static power caused by the leakage problem is getting more and more serious. Reducing the leakage current in the standby mode is a way to reduce power consumption, and reducing leakage current by manual detection and adjustment is not in line with efficiency. Therefore, this thesis proposed an environmental detector that can automatically detect the PVT change and adjust voltage with maintenance circuit to keep the circuit in the state of minim

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14

Davey, Rowena Sjaan. "Soil-borne disease suppression to Rhizoctonia solani AG8 in agricultural soils from a semi-arid region in South Australia." Thesis, 2013. http://hdl.handle.net/2440/82376.

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Rhizoctonia solani AG8 is a significant soil-borne pathogen of cereal roots in semi-arid Mediterranean regions of Australia and the Pacific North West region in the United States of America, causing severe productivity and economic losses to farmers. During the past twenty years the conversion of many farming systems to conservation tillage has meant that the mycelial network of the pathogen is no longer seasonally disturbed by cultivation which has subsequently increased the potential for greater incidence of Rhizoctonia root rot. There has been some success in reducing incidence by using mod

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15

ZHENG, KE-DA, and 鄭可大. "Comparative studies on clubroot disease of crucifers in conducive and suppressive soils." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/24835533541962988416.

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16

Alston, Christine I. "Suppressor of Cytokine Signaling (SOCS)1 and SOCS3 Stimulation during Experimental Cytomegalovirus Retinitis: Virologic, Immunologic, or Pathologic Mechanisms." 2017. http://scholarworks.gsu.edu/biology_diss/172.

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AIDS-related human cytomegalovirus (HCMV) retinitis remains the leading cause of blindness among untreated HIV/AIDS patients worldwide. Understanding the pathogenesis of this disease is essential for developing new, safe, and effective treatments for its prevention or management, yet much remains unknown about the virologic and immunologic mechanisms contributing to its pathology. To study such mechanisms, we use a well-established, reproducible, and clinically relevant animal model with retrovirus-induced murine acquired immunodeficiency syndrome (MAIDS) that mimics in mice the symptoms and p

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17

Κοκκίνης, Ηλίας. "Μέθοδοι επεξεργασίας ηχητικών σημάτων για καταστολή παρεμβολών σε διατάξεις πολλαπλών μικροφώνων". Thesis, 2012. http://hdl.handle.net/10889/5544.

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H παρούσα διατριβή εξετάζει το πρόβλημα της διαρροής μικροφώνου, δηλαδή την αλληλεπίδραση και παρεμβολή μεταξύ ταυτόχρονα ενεργών ηχητικών πηγών σε πολυκαναλικές ηχητικές διατάξεις. Παρ' όλο που είναι ένα πολύ συχνό φαινόμενο με το οποίο οι μηχανικοί ήχου έρχονται αντιμέτωποι καθημερινά, δεν έχουν προταθεί μέθοδοι επεξεργασίας σήματος για την επίλυση του προβλήματος. Εδώ, το πρόβλημα διατυπώνεται για πρώτη φορά στο πλαίσιο της επεξεργασίας σήματος. Αρχικά, διατυπώνεται στο πλαίσιο του τυφλού διαχωρισμού πηγών (blind source separation) και αναλύονται οι περιορισμοί αυτής της προσέγγισης. Σ

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