eKhSACIR інституційному репозитарії Харківської державної академії культури
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Projet BioMarq’Lait : Identification dans le lait de biomarqueurs pour le monitoring du statut nutritionnel de la vache laitière
No full textSession : AlimentationNational audienc
Introduction à l’ACP sur intervalles: Visualiser la distribution des quantiles coûts spécifiques de production du lait de vache dans l’Union européenne
No full textCette communication a été présentée à la session consacrée aux travaux d'ingénieurs des 12e Journées de recherches en sciences sociales (JRSS 2010) de la Société française d'économie rurale (SFER)National audienceThis communication uses symbolic data analysis tools to visualize conditional quantile estimation intervals, applying it to the problem of cost allocation in agriculture. After recalling the conceptual framework of the estimation of agricultural production costs, the first part presents the empirical model, the quantile regression approach and the interval data processing techniques used as symbolic data analysis tools. The second part presents the comparative analysis of the econometric results of milk between twelve European Member States, using the principal components analysis and the hierarchical grouping of the estimation intervals, by discussing the relevance of the exploratory graphs obtained for the international comparisons.Cette communication utilise les outils d'analyse des données symboliques pour visualiser les intervalles d’estimations quantiles conditionnelles, en l’appliquant au problème de l’allocation des coûts en agriculture. Après avoir rappelé le cadre conceptuel de l'estimation des coûts de production agricole, la première partie présente le modèle empirique, l'approche de régression quantile et les techniques de traitement des données en intervalles utilisées comme outils d'analyse de données symboliques. La seconde partie présente l'analyse comparative des résultats économétriques du lait entre douze États membres européens, en utilisant l'analyse en composantes principales et le regroupement hiérarchique des intervalles d'estimation, en discutant de la pertinence des graphiques exploratoires obtenus pour les comparaisons internationale
Effects of maternal Au-NP exposure by ingestion on feto-placental development and placental function, in a rabbit model
No full textNational audienc
Integrating blood transcriptome and immunity traits to identify markers of immune capacity in pigs
No full textInternational audienc
Heterogeneity of genetic diversity throughout the genome in rainbow trout populations
No full textInternational audienc
Multiannual dynamics of P-ions in solution in two French cropped soils after repeated applications of organic wastes products (Contribution ID : 427)
No full textInternational audienc
Analysis of genetic variability of global DNA methylation in response to an early temperature stress in rainbow trout
No full textNational audienc
Mechanical properties of « Flexure Wood »
No full textWood ensures the mechanical stability of the trunk and branches. Its formation is impacted by windy environments: living cells sense mechanical strains and modify the formation of wood accordingly in terms of quantity and quality: these biological responses are called “Thigmomorphogenesis”. We bent young poplars three times a day, five days per week during six months. When a stem is bent, wood endures compressive and/or tensile stresses. Our objective is to determine the impact of these growing conditions on the mechanical properties of wood
Panel discussion 2: user needs and applications
No full textInternational audiencePanel discussion and interaction with participants on the needs of stakeholders with respect to the complexity (and thus the multidisciplinarity) of livestock production and animal-derived products and the way research can respond to these needs
Layers response to a suboptimal diet through phenotype and transcriptome changes in four tissues
No full textInternational audiencePoultry meat and eggs are major sources of nutrients in the human diet. The long production career of laying hens expose them to biotic or abiotic stressors, lowering their production. Understanding the mechanisms of adaptation to stress is crucial for selecting robust animals and meeting the needs of a growing human population. In this study, financed by the French ChickStress and the European Feed-a-Gene (grant agreement no. 633531) programs, we compared the effects of a 15%-energy-reduced diet (feed stress, FS) vs a commercial diet (control, CT) on phenotypic traits and adipose, blood, hypothalamus and liver transcriptomes in two feed-efficiency-diverging lines. Phenotypic traits showed differences between lines or diets, but no line × diet interaction. In the FS group, feed intake (FI) increased and hens had lower body- and abdominal adipose weight, compared to CT group. We found no differences in egg production or quality. At the transcriptomic level, 16,461 genes were expressed in one or more tissues, 41% of which were shared among tissues. We found differentially expressed genes between lines or diet in all tissues, and almost no line × diet interactions. Focusing on diet, adipose and liver transcriptomes were unaffected. In blood, pathways linked to amino acids, monosaccharides, and steroid metabolism were affected, while in the hypothalamus, changes were observed in fatty acid metabolism and endocannabinoid signalling. Given the similarities in egg production, the FS animals seem to have adapted to the stress by increasing FI and by mobilizing adipose reserves. Increase in FI did not appear to affect liver metabolism, and the mobilization of adipose reserves was apparently not driven at the transcriptomic level. In blood, the pathways linked to metabolic processes suggest a metabolic role for this tissue in chicken, whose erythrocytes are nucleated and contain mitochondria. FI increase might be linked to the hypothalamic pathway of endocannabinoid signalling, which are lipid-based neurotransmitters, notably involved in the regulation of appetite