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Artykuły w czasopismach na temat "Méthanogènes"
POPOVA, M., D. P. MORGAVI, M. DOREAU i C. MARTIN. "Production de méthane et interactions microbiennes dans le rumen". INRAE Productions Animales 24, nr 5 (8.12.2011): 447–60. http://dx.doi.org/10.20870/productions-animales.2011.24.5.3277.
Pełny tekst źródłaLessard, P., C. Bourgault, Y. LeBihan, N. Turgeon, G. Aubry i G. Buelna. "Traitement des lisiers de porc par un procédé de biofiltration : Étude de formation du méthaneLe présent ouvrage fait partie d'une série d'articles publiés dans ce numéro spécial sur le traitement biologique de l'air." Canadian Journal of Civil Engineering 36, nr 12 (grudzień 2009): 1958–62. http://dx.doi.org/10.1139/l09-136.
Pełny tekst źródłaBAYOURTHE, C., i D. ALI-HAIMOUD-LEKHAL. "Les extraits de plantes chez le ruminant : effets sur les fermentations dans le rumen et la qualité lipidique des produits animaux". INRAE Productions Animales 27, nr 4 (23.10.2014): 317–28. http://dx.doi.org/10.20870/productions-animales.2014.27.4.3079.
Pełny tekst źródłaSereme, Y., M. Michel, S. Mezouar, T. Tu Anh, P. Corbeau, A. Filleron i J. Vitte. "Microbiote et allergie : une signature néonatale intestinale et la composante des Archaea méthanogène prédit le développement ultérieur de maladies atopiques". Revue Française d'Allergologie 62, nr 3 (kwiecień 2022): 334. http://dx.doi.org/10.1016/j.reval.2022.02.109.
Pełny tekst źródłaFONTY, G., Ph GOUET i Véronique SANTE. "Influence d'une bactérie méthanogène sur l'activité cellulolytique et le métabolisme de deux espèces de champignons cellulolytiques du rumen in vitro. Résultats préliminaires". Reproduction Nutrition Développement 28, nr 1 (1988): 133–34. http://dx.doi.org/10.1051/rnd:19880129.
Pełny tekst źródłaDohou, Alfred Dèdonougbo, Koto Gabin N’Gobi, Clément Adéyèmi Kouchade i Basile Bruno Kounouhewa. "Evaluation du pouvoir methanogene de la jacinthe d’eau sur le Lac Nokoue à Ganvie au Benin". Journal de Physique de la SOAPHYS 2, nr 2 (12.05.2021): C20A23–1—C20A23–5. http://dx.doi.org/10.46411/jpsoaphys.2020.02.23.
Pełny tekst źródłaTrouvé, E., i S. Belloir. "Un procédé de fractionnement innovant au coeur du développement des stations d’épuration durables de demain". Techniques Sciences Méthodes, nr 4 (kwiecień 2019): 37–44. http://dx.doi.org/10.1051/tsm/201904037.
Pełny tekst źródłaDOREAU, M., R. BAUMONT i J. M. PEREZ. "Avant-propos". INRAE Productions Animales 24, nr 5 (8.12.2011): 411–14. http://dx.doi.org/10.20870/productions-animales.2011.24.5.3274.
Pełny tekst źródłaToure, Fatou Kiné, Modou Dieng, Mamadou Faye, Malick Diedhiou, Mbagnick Thiam i Falilou Mbacké Sambe. "Traitement des déchets graisseux par co-digestion avec les boues pour la production de biogaz dans les stations d’épuration de l’Office National de l’Assainissement du Sénégal (ONAS)". Revue Africaine d’Environnement et d’Agriculture 6, nr 2 (3.07.2023): 2–10. http://dx.doi.org/10.4314/rafea.v6i2.2.
Pełny tekst źródłaAmrani, Moussa, i Nassima Tazrouti. "Méthanisation des eaux résiduaires de la production des levures fourragères dans un biofiltre thermophile". Journal of Renewable Energies 12, nr 1 (26.10.2023). http://dx.doi.org/10.54966/jreen.v12i1.114.
Pełny tekst źródłaRozprawy doktorskie na temat "Méthanogènes"
Grine, Ghiles. "Méthanogènes : entre commensalisme et opportunisme". Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0623.
Pełny tekst źródłaIn the first part of our thesis, we reviewed the literature of all the methanogenic species found in the different microbiota of humans. We also reviewed the various methods used in clinical microbiology to research and identify these microorganisms. In a second part of our thesis, we have shown that the human digestive tract is colonized by M. smithii from the first day of life thus posing the question of potential sources of acquisition of this methanogen. We detected and isolated M. smithii and M. oralis in colostrum and breast milk suggesting mother-to-child contamination by breastfeeding. For vaginal specimens, M. smithii is detected in 97% of the samples collected from patients with bacterial vaginosis. Subsequently, we reported the detection of methanogens, M. oralis and M. smithii in the salivary fluid of individuals with no oral disease. In the third part of our thesis, we have shown for the first time that methanogens are part of the urinary microbiota in which we found M. smithii with a prevalence of 9%. Finally, we have optimized the methods of research and isolation of methanogens. We have developed a chemical method for producing H2. The expertise acquired and the results obtained during this thesis, invite us to continue research work in clinical microbiology of methanogens, questioning more particularly their roles in physiology and oral pathology
Nkamga, Vanessa Demonfort. "Les Archaea méthanogènes comme pathogènes opportunistes". Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM5026.
Pełny tekst źródłaMethanogens are strict anaerobic Archaea, known to the only being able to producing methane gas as a byproduct. Methanogens which are not detected in clinical microbiology laboratories were present in oral, digestive, vaginal and cutaneous microbiota of human. Only five species on the thirteen known in human have been cultivated before the beginning of our thesis. In our thesis, we initially reviewed the state of knowledge about methanogens in human microbiota, particularly the new order Methanomassiliicoccales of methylotrophic methanogens, the as member of human microbiota. In the second part of this work, we performing new method for methanogens culture and isolation without any dihydrogen atmosphere, by co-cultured in tubes methanogens with Bacteroides thetaiotaomicron, which produces hydrogen. We also developed Multispacer Sequence Typing (MST), a genotyping method based on intergenic spacers sequencing, to genotype M. oralis and Methanobrevibacter. Smithii. We demonstrated that methanogens could be part of polymicrobial infection in the case of brain and sinusal abscesses, and also in skeletal muscle abscess, by isolating for the first time M. oralis and M. smithii in these pathologies, using culture-based and molecular-based approaches, and suggested that methanogens could be considered as human opportunistic or emerging pathogens. Finally, we tested the in vitro susceptibility of lovastatin which is a prodrug used as a powerful serum cholesterol-lowering drug in some human diseases and showed that it’s inhibits growth and methane production in human-associated methanogens without affecting intestinal bacteria
Sogodogo, Elisabeth. "Détection des méthanogènes dans la flore oro-sinusale". Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0238.
Pełny tekst źródłaIn the first part of our thesis, we reviewed the literature on the methanogens found in the different microbiota of humans. We also reviewed the various methods used for the detection of these microorganisms in the clinical microbiology laboratory. In a second part of our Thesis work, we tested the hydrogen production by facultative anaerobic bacteria of clinical interest. , especially bacteria previously found associated with methanogens in clinical samples. We have observed that not all facultative anaerobic bacteria have the capacity to produce hydrogen gas and we have reported three bacteria that were not known in the literature for the production of hydrogen. In the third part of our Thesis, we explored the sinus flora in search of methanogens. Molecular biology, fluorescent in situ hybridization and microbial culture demonstrated methanogens in nine different patients with sinus infections. We were interested in looking for methanogens in the oral cavity in another type of population more specifically in a center of odonto-stomatology in Mali. In total, we obtained eight positive samples for methanogens. In the last part of our Thesis, we studied the archaea and bacteria repertoire associated with fifteen different plant species used as natural toothbrushes in Bamako, Mali
Vedrenne, Fabien. "Etude des processus de dégradation anaérobie et de production de méthane au cours du stockage des lisiers". Rennes, Agrocampus Ouest, 2007. http://www.theses.fr/2007NSARD048.
Pełny tekst źródłaThe storage of the livestock wastes lasting up to 6 months before the use as organic fertilizers, lead to methane emission, a greenhouse gas. The quantification of these emissions shows important variations and thus large uncertainties. In order to highlight the intrisic slurry parameters influencing the methane emission, batch storage simulations of thirteen different slurries were performed. First, in optimal conditions (30°C), from 35 to 65 % of the intital COD is mineralized into methane (50 to 75 %) and carbon dioxide (25 to 50 %), corresponding to ultimate methane producing capacity (B0) from 196 to 384 LCH4/kgVS. The no-biodegradable organic matte ris mainly composed of lignin, polysaccharides (cellulose and hemicellulose) and proteins. These fractions seem also to reduce the hydrolysis kinetics and lead to weaker methane percentages of the mineralized carbon. At storage temperature, I. E. 13°C, microbial activities are limited. Thus, the slurries produce only between 1 and 49 % of the B0. The main limitation is related to the methanogenesis step. For most of the slurries, methane is mainly (75 %) produced through the acetotrophic pathway. For the first time the acetotrophic microflora, responsible of this pathway was identified if pig slurry. The successive methane production peaks could be explained by a succession of methanogens microflora. Reversible inhibitions and/or Hé defects could be also involved. In condition of irreversible inhibition, it seems that methane is mainly produced by the hydrogenotrophic pathway. The acetate accumulatino and the H2 mass balance support this assumption. Although no specific chemical specie was determined as responsible for inhibitions, the VFA, the VFAH, the H2S and the acid pH are strongly suspected. On the other hand, NH3 seems to have no effect on the methanognenesis
Samain, Eric. "Microbiologie et biochimie de l'acétogenèse dans les écosystèmes méthanogènes". Lille 1, 1987. http://www.theses.fr/1987LIL10228.
Pełny tekst źródłaJeannin, Pascale. "Dégradation du phénol en conditions méthanogènes : aspects microbiologiques et biochimiques". Lyon 1, 1986. http://www.theses.fr/1986LYO11727.
Pełny tekst źródłaTawfiki, Hajji Khalid. "Influence de quelques facteurs physico-chimiques sur la fermentation méthanique et la physiologie des souches impliquées : rôle du rapport C/N/P, des cations alcalins et des oligoéléments". Lille 1, 1987. http://www.theses.fr/1987LIL10007.
Pełny tekst źródłaGruson, Bernard. "Étude de la néoglucogenèse et de la glycogénogenèse de Méthanothrix soehngenii". Lille 1, 1988. http://www.theses.fr/1988LIL10035.
Pełny tekst źródłaPellerin, Patrice. "Caractérisation des oligosaccarides de Methanothrix soehngenii : mise en évidence de liaisons covalentes avec les protéines". Lille 1, 1987. http://www.theses.fr/1987LIL10067.
Pełny tekst źródłaGrabowski-Lux, Agnès. "Analyse de la diversité microbienne d'un gisement pétrolier biodégradé". Brest, 2004. http://www.theses.fr/2004BRES2031.
Pełny tekst źródłaThe presence of microorganisms in oil fields has been detected for a long time and sulphate reducers have been extensively studied in these ecosystems. However, our knowledge of the diversity and the activities of the bacteria thriving in these particular subterranean environments is still limited. In this study, we have characterized the microbial population in a low-temperature and low-salinity Canadian oil reservoir using both cultural and molecular techniques. The dominant cultivable population was composed of homoacetogens, acetoclastic methanogens, sulphate reducers and denitrifiers. Molecular analysis of enrichment cultures showed the presence of a wider diversity of microorganisms related to Proteobacteria (beta, delta, epsilon), Firmicutes, Bacteroidetes, Spirochaetes, Deferribacteres and Euryarchaeota. Some of the predominant cultivable bacteria could be isolated and one fermentative strain affiliated to the Bacteroidetes was characterized. On the basis of chemotaxonomic and phylogenetic data, a new genus and a new species, Petromonas sulfurophila could be proposed. Direct analysis of the production water confirmed the presence of methanogens related to Methanosarcinales (Methanosaeta, Methanosarcina, Methanolobus) and Methanomicrobiales (Methanocorpusculum, Methanocalculus, Methanoculleus, Methanospirillum). A unique phylotype related to Arcobacter (Proteobacteria epsilon) was obtained in the bacterial library but the ecological significance of the corresponding microorganisms is unknown. Cross evaluation of microbial and geochemical data suggests that methanogenesis is the dominant terminal process in this oil field. Characterization of long chain fatty acid-degrading consortia showed that methane could be produced by syntrophic associations involving several methanogenic bacteria using acetate, hydrogen or formate. Similar associations could perhaps be involved in hydrocarbon degradation in situ
Części książek na temat "Méthanogènes"
WAGNER, Tristan, Laurent TOFFIN i Guillaume BORREL. "Les archées méthanogènes". W Les archées, micro-organismes du troisième domaine du vivant 1, 217–60. ISTE Group, 2024. http://dx.doi.org/10.51926/iste.9168.ch5.
Pełny tekst źródłaFORTERRE, Patrick. "Évolution des archées et de leur taxonomie". W Les archées, micro-organismes du troisième domaine du vivant 1, 33–93. ISTE Group, 2024. http://dx.doi.org/10.51926/iste.9168.ch2.
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