Literatura científica selecionada sobre o tema "Biocarburants – Recherche"
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Artigos de revistas sobre o assunto "Biocarburants – Recherche"
de Lattre-Gasquet, Marie, Dominique Vermersch, Marcel Bursztyn e Pierre-Henri Duée. "Quelles questions éthiques posent la production de palmier à huile et la recherche sur les biocarburants ?" Oléagineux, Corps gras, Lipides 17, n.º 6 (novembro de 2010): 375–84. http://dx.doi.org/10.1051/ocl.2010.0348.
Texto completo da fonteBayala, Roger, Ibrahima Diedhiou, Laopé Ambroise Casimir Siene, Kouakou Abessika Georges Yao e Christine Valentine Noella Sagna. "Test de Germination des Graines de Ricin (Ricinus communis L.) Sous Différentes Contrainte Abiotiques". European Scientific Journal, ESJ 20, n.º 3 (31 de janeiro de 2024): 197. http://dx.doi.org/10.19044/esj.2024.v20n3p197.
Texto completo da fonteDUCROT, C., J. CHARLEY-POULAIN e J. M. AYNAUD. "Numéro hors série 2004 : Encéphalopathies spongiformes transmissibles animales -Sommaire et avant-propos". INRAE Productions Animales 17, HS (18 de dezembro de 2004). http://dx.doi.org/10.20870/productions-animales.2004.17.hs.3612.
Texto completo da fonteTeses / dissertações sobre o assunto "Biocarburants – Recherche"
Taleb, Aumaya. "Production de biodiesel à partir des microalgues : recherche des souches accumulatrices des lipides et optimisation des conditions de culture en photobioréacteurs". Nantes, 2015. https://archive.bu.univ-nantes.fr/pollux/show/show?id=560a126a-afd7-402f-bf4c-b550b15ecc4c.
Texto completo da fonteLes microalgues apparaissent comme une source végétale prometteuse pour la production du biodiesel. Cela implique cependant une optimisation systématique de nombreux aspects afin d'envisager une exploitation industrielle durable et compétitive. Le présent travail porte sur l'amélioration de la production en triglycérides, par notamment deux étapes clés : la sélection d'une souche performante et l'optimisation des conditions de cultures en photobioréacteurs. Dans un premier temps, une méthodologie de criblage des souches de microalgues a été développée, prenant en considération des critères représentatifs de l'application industrielle envisagée. Les résultats de criblage ont montré que Parachlorella Kessleri UTEX2229 ressort comme la souche la plus performante. Les expérimentations d'optimisation de production sous lumière continue ont montré une productivité surfacique maximale en biomasse de 27 g. M-2. J-1 pour un flux incident qo = 430 µmol. M-2. S-1 . Cette valeur s'est montrée similaire aux performances d'autres souches rapportées dans la littérature et connues pour leur forte productivité en biomasse. Après optimisation, des fortes accumulations de triglycérides (jusqu'à 48 % MS) ainsi que les productivités importantes en triglycérides (9. 125 à 16,06 tTAG. Ha-1. A-1) ont été observées en carence azotée
Alharake, Jawad. "Study of genetic factors involved in enzyme secretion in hyperproductive strains of Trichoderma reesei". Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASB061.
Texto completo da fonteFossil fuels are a major contributor to global warming, and their non-renewable nature is an impediment for building sustainable societies. In this context, second generation biofuels represent an attractive and more environmentally friendly alternative. The process of second-generation biofuel production consists of several steps including a physicochemical pretreatment of lignocellulosic (non-edible) biomass, the enzymatic hydrolysis of cellulose into glucose and the fermentation of simple sugars into biofuels, such as bioethanol. One of the main bottlenecks for a large implementation of this process is, however, the relatively high cost of hydrolytic enzymes, namely cellulases, used to deconstruct the pretreated lignocellulosic biomass into fermentable sugars.The filamentous fungus Trichoderma reesei is the preferred choice for industrial production of cellulases since it has hyperproduction and hypersecretion capacities. Industrial strains of T. reesei can secrete up to 100 g/L of cellulases in controlled industrial fermenters. In particular, the mutant strain Rut- C30 is a reference hyperproducer strain, but our incomplete understanding of its enhanced secretion system complicates further improvement of its hypersecretion capacity by genetic engineering. Therefore, this work aimed at unravelling the regulatory pathways controlling secretion and the secretion stress response in order to identify bottlenecks and to develop new strains with enhanced secretion capacity in the future.To this end, transcriptomic data were generated from cultivations of T. reesei Rut-C30 in different secretion stress conditions which allowed to identify potential components of secretion regulation that were targeted for deletion. As a complementary approach, mining of transcriptomic data obtained with other filamentous fungi in secretion stress conditions revealed further target genes potentially involved in the regulation of the secretion pathway. Finally, nine genes were deleted in the Rut-C30 strain, and the resulting strains phenotypically characterized. All of them displayed reduced growth and showed altered protein secretion behavior. RNA sequencing was performed on ∆res2, ∆rpn4 and ∆snd1 mutant strains and compared to that of Rut-C30 in the same culture conditions. Neither of the three transcription factors impacts transcription of genes involved in secretion or the secretion stress response in our conditions. However, in all three mutants, genes encoding enzymes of lipid metabolism are differentially expressed which could affect secretion in an indirect way. The results represent first clues to alleviate bottlenecks in secretion in T. reesei Rut-C30 and pave the way to develop strains with still improved secretion capacity
Tari, Thomas. "Le domaine des recherches. L'émergence et le développement des bioénergies comme cadre de production de connaissances". Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC0072/document.
Texto completo da fonteNeither academic training within scientific disciplines, nor the daily work in the lab involving specialised equipments, define alone a scientific culture. What diverse researchers from various backgrounds work on, builds a specific way of designing their own activities, practices and relationships with the world. Their individual success is irrevocably bound to a subject, to its fortune as an innovation within the boundaries of a social context it simultaneously changes. How do they perform this (re)conversion to a new domain, as funding agencies nowaday favor this thematic framing? This thesis proposes an investigation into the notion of “research area”, which we a priori define as the frame of interactions between the professional activity of researchers and society around a shared theme; it stands up for its epistemic dimension.This manuscript parallelly describes the “bioenergy” development, a major form of renewable or sustainable energy derived from biomass, its social actors and their interrelations, as strong incentives towards a global energy transition meet sharp social controversies. The two objectives of this thesis meet: describing the inherent style of thinking within a particular research area is required to grasp, beyond the hopes and promises, the actual patterns of development of an innovation (in this case, the large-scale mobilisation of plants, microorganisms or waste to produce biofuels) and thus, ultimately, to collectively evaluate its relevance
Poggi-Parodi, Dante. "Une approche de biologie systémique pour développer des souches industrielles performantes de Trichoderma reesei". Electronic Thesis or Diss., Paris 6, 2014. http://www.theses.fr/2014PA066721.
Texto completo da fonteA lot of progress had been done in recent years to understand the regulation of synthesis and secretion of cellulases in the fungus Trichoderma reesei. However, the production cost of cellulases still remains one of the most important limiting steps in the production of bioethanol from lignocellulose. It is in this context that my PhD project has been developed: to genetic engineering T. reesei strains to increase its cellulase production and its adaptation to industrial conditions. First, we conducted a transcriptome analysis to an improved lineage of industrial strains during cellulase production following conditions close to the industrial process (lactose as inducer and fed-batch culture in bioreactor). We found specifically regulated genes for the most performant strain, possibly involved in its high cellulase production capacity. Then, we identified which regulated genes from transcriptome were involved in cellulase production. For this purpose mutated strains for highly regulated genes were constructed and their phenotype assessed. Three mutated genes showed to impact cellulase production and their function gave us an insight into new mechanisms being regulated. Finally, we explored the expression differences when we used a lignocellulose hydrolysate as cellulases inducer instead of lactose. A transcriptomic study of cellulases production on lignocellulose hydrolysates and lactose, allowed us to characterize the differences in regulated genes between these inducers. In addition, a group of genes probably related to detoxification was identified and could be used in the future to develop an inhibitor resistant strain
Debiton, Clément. "Identification des critères du grain de blé (Triticum aestivum L.) favorables à la production de bioéthanol par l'étude d'un ensemble de cultivars et par l'analyse protéomique de lignées isogéniques waxy". Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2010. http://tel.archives-ouvertes.fr/tel-00625530.
Texto completo da fonteBen, Fradj Nosra. "Analyse micro-économique spatialisée des enjeux environnementaux de l’introduction de productions agricoles à finalité énergétique". Electronic Thesis or Diss., Paris, AgroParisTech, 2013. http://www.theses.fr/2013AGPT0007.
Texto completo da fonteThe main objective of this thesis is to perform an economic analysis of the impacts of second generation (2G) biofuel crops production on land use, agricultural practices and the environment. As for the environmental impacts, we focus on the relationship between the nitrogen fertilizers' consumption and the pollutants emissions (N2O, NH3 et NO3). The second objective is to estimate the potential development of 2G ethanol production in France. The available data and modeling tools that we use in this thesis allow for an economic analysis on a fine spatial dimension. The agricultural supply, given by the AROPAj model, is then combined with the different French bioenergy demands and public policies, which are modeled by the TIMES-GeoMIRET model. This modeling framework allows us to highlight the coherence of bioenergy objectives with the biomass resource potential through the analysis of the technological choices and the regionalisation of the bioenergy plants. Results indicate that "fuel" is not competing only with food, but also with "feed" because producing biomass is achieved at the expense of food and feed production. Cultivating dedicated biomass crops decreases land allocated to crops with high nutrient requirements, and consequently reduces the nitrogen losses. The coupling between AROPAj and TIMES-GeoMIRET has shown that 0.5 Mt of ethanol/year should be produced in 2030, which corresponds approximately to an output capacity of 3 processing plants. These plants should be built in the French northwest region, more precisely at Lillebonne where a 1G ethanol plant already exists
Alkadee, Dareen. "Techniques de réduction et de traitement des émissions polluantes dans une machine thermique". Phd thesis, Conservatoire national des arts et metiers - CNAM, 2011. http://tel.archives-ouvertes.fr/tel-01005123.
Texto completo da fonteCapítulos de livros sobre o assunto "Biocarburants – Recherche"
Basse, Diaga. "Recherches sur la Sustainability". In Recherches sur la Sustainability, 213–32. EMS Editions, 2023. http://dx.doi.org/10.3917/ems.cheva.2023.01.0213.
Texto completo da fonteRelatórios de organizações sobre o assunto "Biocarburants – Recherche"
Fontecave, Marc, e Candel Sébastien. Quelles perspectives énergétiques pour la biomasse ? Académie des sciences, janeiro de 2024. http://dx.doi.org/10.62686/1.
Texto completo da fonte