L'Institut Agro Archives Ouverte
Not a member yet
4294 research outputs found
Sort by
Influence of biorientation and humidity on PLA films and PVA coatings for enhanced performances
No full textNational audienc
Interactions between lactic acid bacteria and the redox environment and their effects on the quality of hard and semi-hard cheeses
No full textInternational audienc
Main conclusions and perspectives from the collective scientific assessment of the effects of plant protection products on biodiversity and ecosystem services along the land–sea continuum in France and French overseas territories
No full textErratum : 10.1007/s11356-025-36011-4International audiencePreservation of biodiversity and ecosystem services is critical for sustainable development and human well-being. However, an unprecedented erosion of biodiversity is observed and the use of plant protection products (PPP) has been identified as one of its main causes. In this context, at the request of the French Ministries responsible for the Environment, for Agriculture and for Research, a panel of 46 scientific experts ran a nearly 2-year-long (2020-2022) collective scientific assessment (CSA) of international scientific knowledge relating to the impacts of PPP on biodiversity and ecosystem services. The scope of this CSA covered the terrestrial, atmospheric, freshwater, and marine environments (with the exception of groundwater) in their continuity from the site of PPP application to the ocean, in France and French overseas territories, based on international knowledge produced on or transposable to this type of context (climate, PPP used, biodiversity present, etc.). Here, we provide a brief summary of the CSA's main conclusions, which were drawn from about 4500 international publications. Our analysis finds that PPP contaminate all environmental matrices, including biota, and cause direct and indirect ecotoxicological effects that unequivocally contribute to the decline of certain biological groups and alter certain ecosystem functions and services. Levers for action to limit PPP-driven pollution and effects on environmental compartments include local measures from plot to landscape scales and regulatory improvements. However, there are still significant gaps in knowledge regarding environmental contamination by PPPs and its effect on biodiversity and ecosystem functions and services. Perspectives and research needs are proposed to address these gaps
Quelles sont les représentations sociales de l'alimentation durable chez les consommateur·rices et comment cela se traduit dans leurs intentions de choix alimentaires ?
No full textNational audienceOriane Chene est doctorante en sciences du comportement alimentaire au Centre des Sciences du Goût et de l'Alimentation (CSGA) à l'INRAE de Dijon, sous la direction de Stéphanie Chambaron (Directrice de recherche, INRAE) et Gaëlle Arvisenet (Professeure à l'Institut Agro Dijon). Ses travaux de thèse portent sur l'alimentation durable et plus spécifiquement sur la compréhension qu'ont les consommateur·rices en France de l'alimentation durable. Deux questions principales sont abordées dans ses travaux : quelles sont les représentations sociales de l'alimentation durable chez les consommateur·rices et comment cela se traduit dans leurs intentions de choix alimentaires
Discrimination against people with mental, physical or visual disabilities in the French rental housing market: field experiment
No full textInternational audienceWe implement correspondence testing to detect and assess the extent of discrimination against people with disabilities in the French rental housing market. By sending 1,750 emails in a matched-pair procedure, we provide evidence of significant and extensive discrimination against blind people with a guide dog, individuals with mental disabilities, and individuals with motor impairments in the process of rented housing allocation. However, the primary cause of discrimination against blind individuals appears to stem from the presence of the guide dog, rather than the disability itself. Our results are also consistent with the presence of statistical discrimination (particularly based on financial means). We find that absolute discrimination against disabled applicants increases in accordance with the level of rent, while real estate agents discriminate significantly less against disabled applicants than private landlords
Advances in the reduction of herbicide use in Conservation Agriculture: French case studies
No full textInternational audienceConservation agriculture (CA) appears as a promising agricultural pathway to achieve multiperformance but is currently questioned due to its reliance on herbicides for weed management, especially glyphosate. One limit in the development of CA-based agroecological cropping system less reliant on herbicide use is the strict definition of CA based on technical means (i.e. the three principles) rather than targeted objectives. In this chapter, the authors mobilize research carried out on experimental stations (e.g. CA-SYS platform) and farmer networks (e.g. French DEPHY-farm network) to synthesize knowledge on how herbicide-free no-till agriculture could be achieved. They provide insights on the multiperformance of herbicide-free and nature-based CA systems compared to reference CA systems. Designing cover crops to ensure growth in a context of unpredictable weather conditions and facilitate mechanical termination, and ensuring crop establishment in absence of tillage and herbicides represent major research avenues for the development of pesticide-free CA systems
Investigating Oenococcus oeni citrate locus expression: Role of citR and impact on acid tolerance
No full textInternational audienceA previous adaptive evolution experiment performed on the wine bacterium Oenococcus oeni revealed the beneficial effect of slowing down citrate metabolism on the acid tolerance of this bacterium. This finding prompted us to investigate the regulation pathways of the cit locus expression in this lactic acid bacterium, an investigation which has never been undertaken before. Mapping the cit locus, composed of a long mae-maeP-citCDEFXG cluster preceded by citR in a divergent direction, highlighted the expression of a citR messenger overlapping the coding sequence of mae, the first gene of the operon. Transcriptional analysis of the locus suggested that the transcript of maeP, encoding the citrate permease, could be stabilize by this antisense. Furthermore, genetic complementation has demonstrated the transcriptional regulatory function of CitR on the cit operon expression. This work contributes to a new understanding of the regulation of citrate metabolism in O. oeni which is involved in diacetyl production giving a buttery aroma to wine. It also provides new evidence for the involvement of citrate metabolism in the acid stress response of this bacterium, therefore in its ability to conduct malolactic fermentation in very acid wines
Biobased antioxidant packaging from chitosan incorporating cashew leaf extract and TiO2 nanoparticles for soybean oil preservation
No full textInternational audienceIn this study, antioxidant chitosan (CS)-based packaging films were functionalized with cashew leaf extract (CE) (1.5 %, w/v; as a source of natural antioxidant additive for food preservation) and/or titanium dioxide nanoparticles (TiO2) (0.5 %, w/w based on CS content; as UV-blocking additives). TiO2 nanoparticles improved the mechanical properties [tensile strength (24.62 MPa), elongation at break (39.37 %)] of the CS films. The addition of CE greatly improved the antioxidant activity (66.31 %) of the CS films and significantly affected the structure of the CS matrix, as evidenced by FTIR spectroscopy and XRD. The CS films functionalized with CE and TiO2 exhibited the lowest L & lowast; value (63.96), UV-visible light transmission (0.01-38.77 %), and water contact angle (59.2 degrees) and the highest water vapor permeability (5.30 x 10(-10) g m m(-2) s(-1) Pa-1), compared with those of the CS-based films functionalized with CE or TiO2 nanoparticles alone (p < 0.05). Moreover, oxidation of soybean oil packed with either CS/CE/TiO2 films or control CS films was monitored for 21 days under accelerated storage conditions. The CS/CE/TiO2 pouches showed a preventive effect on lipid oxidation of soybean oil, as evidenced by lower peroxide values after 21 days. Consequently, the CS/CE/TiO2 films could serve as an antioxidant packaging film to extend the shelf life of lipid-containing foods
Microscopie OPTIR pour la caractérisation des microorganismes d'intérêt alimentaire.
No full textInternational audience"La spectroscopie OPTIR (Optical PhotoThermal InfraRed spectroscopy) est une technique de spectroscopie vibrationnelle utilisant un laser à cascade quantique (QCL) moyen-IR accordable qui induit un effet photothermique à la surface de l’échantillon, lorsque la longueur d'onde IR correspond à l’énergie d’un mode de vibration. Cet effet photothermique est mesuré à l'aide d'un laser de sonde, de longueur d’onde dans le visible, focalisé à la surface de l'échantillon [1]. Il s’agit d’une technologie qui permet des mesures de spectroscopie IR ainsi que la réalisation d'images chimiques d'absorption infrarouge, avec une résolution spatiale submicronique identique à celle de l'imagerie photonique et indépendante de la longueur d'onde d’absorption. L'OPTIR offre ainsi une mesure d'absorption IR de qualité, sans contact avec la surface. Adossé à l’UMR PAM, le site imagerie spectroscopique de la plateforme Dimacell met à disposition de la communauté scientifique un microscope basé sur cette technologie avec un équipement permettant également de faire une analyse Raman en simultané et en développe les applications dans le domaine de la microbiologie. L’objectif de cette présentation est de présenter en détails la mise en œuvre de cette technique d'imagerie spectroscopique émergente et de ses potentialités, ainsi que son application pour la caractérisation et l’identification de microorganismes (bactéries, levures, spores).