Search results for "Produit"

Participation des facteurs nutritionnels et environnementaux au vieillissement de la rétine et aux rétinopathies liées à l’âge

2012

Aging is defined by all the physiological processes that alter the structure and functions of the body. With advanced age, aging of the human retina can evolve into pathological forms, agerelated macular degeneration (AMD) or diabetic retinopathy (DR). The mechanisms involved in the transition from normal aging to a pathologic state are poorly understood. Oxidative stress and advanced glycation end-products are promoting factors for aging of the retina. Meanwhile, epidemiological studies suggest that a diet rich in long-chain omega-3 polyunsaturated fatty acids (LC-PUFA) such as EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), potentially protects against the development of AMD a…

Rice cooking and sensory quality

2019

International audience; This chapter provides a state-of-the-art review of the diversity and dynamics of consumer demand with respect to the eating quality of rice worldwide. Quality includes both tangible measurable factors (rice characteristics) and the context of consumption. The main sensory attributes evaluated around the world are described, and their relationship with the diversity of consumer demand is discussed. Instrumental methods for predicting quality measured on either raw or cooked grains are reviewed. The changes that occur in the rice grain during cooking are described along with a modeling approach able to predict the changes and their spatial distribution in the rice grai…

Effects of garlic powders with varying alliin contents on hepatic drug metabolizing enzymes in rats

2003

International audience; The anticarcinogenic effect of garlic has been demonstrated in both epidemiologic and experimental studies. In this study, possible mechanisms involved in the anticarcinogenic effect of garlic consumption were assessed by determining its capacity to alter drug metabolizing enzymes, in relation with its alliin content. Rats were fed a diet for 2 weeks containing 5% garlic powders produced from bulbs grown on soils with different levels of sulfate fertilization and therefore containing differing amounts of alliin. Activities of several hepatic enzymes, which are important in carcinogen metabolism such cytochromes P450 (CYP) and phase II enzymes, were determined. Garlic…

Assessment wine aroma persistence by using an in vivo PTR-ToF-MS approach and its relationship with salivary parameters

2019

To better understand wine aroma persistence, the nasal cavity of nine volunteers was monitored by Proton Transfer Reaction-Time of Flight-Mass Spectrometry (PTR-ToF-MS) after they rinsed their mouths with three rosé wines (one control and the same wine supplemented with two tannin extracts) during four minutes. Wines were aromatised with a mixture of five target aroma compounds. Results showed that wine aroma persistence was highly compound-dependent: while esters disappeared very fast, other compounds such as linalool remained in the oral cavity for longer times after wine expectoration. A low effect of tannins (at 50 mg/L) on nasal cavity parameters was observed, with the exception for th…

Santé et commerce international. Contribution à l'étude de la protection des valeurs non marchandes par le droit du commerce international

2006

Etude de l'influence de l'hydratation des laitiers sur les propriétés de transfert gazeux dans les matériaux cimentaires

2015

Cements with high slag content are currently studied as possible candidate for nuclear waste containment materials. In this context it is important to know their microstructure and the transport properties (permeability and diffusion) of the gases that are formed by the radiolysis of the water present in this material. According to literature, these properties are strongly impacted by the addition of blast furnace slag. The aim of this work is to correlate the hydration processes of slag blended cements with their transport properties. In the first part of this work, the hydration of the slag blended cements, for which only few results have been reported to date, has been studied. Silicon-2…

Analyse cartographique de données pédologiques et hydrogéologiques appliquée à la gestion responsable de produits phytosanitaires

2014

BASF launched a Responsible Bentazone Management plan in 2011, in order to preserve water resources and sustain its bentazon based herbicide solutions. This molecule is commercialized by the company for several years and is found at concentrations above the standard for drinking water in about 1% of groundwater catchments in France. The action plan aims to reduce contamination situations with recommendations on the use of bentazone (dose, timing of application, restrictions on vulnerable soils on groundwater catchment areas) that complement the commercialization authorization. The study carried out during the internship focused on the diagnosis of a groundwater catchment area located in the…

Rôle des espèces sulfures dans la corrosion des aciers non alliés : hétérogénéités de la couche de produits de corrosion et couplages galvaniques

2014

The present study relates to the problem of the long-term interim storage of nuclear wastes. In France, it is envisaged that high-level radioactive wastes will be confined in a glass matrix, stored in a stainless steel canister, itself placed in a carbon steel overpack. The wastes will then be stored at a depth of ~450 m in a deep geological disposal, drilled in a very stiff (indurated) clay (argillite) formation. A temperature as high as 90°C is expected at the steel surface because of the intense radioactivity. Anodic polarization at applied current density was used to synthetize corrosion product layers likely to be formed in storage conditions. The S235 steel electrodes were covered by …

UV resistance of Bacillus subtilis spores - Involvement of DPA and characterization by photonic microscopy

2022

The aim of this project was to study the UVc resistance of Bacillus subtilis spores. The first part of this project focused on the dipicolinic acid molecule (DPA) which is known to be involved in the UV resistance of spores. However, some points remain unresolved. In particular, it is known that this molecule forms fluorescent photoproducts (DPAp), which were not identified at the beginning of this project. No information concerning the role of these DPAp in UVC resistance was available at that time. During this project, a protocol was established to follow the appearance of these photoproducts directly inside the spore core. A method was also set up to artificially introduce DPAp into the …

"Diagonale des Fous" : stratégie événementielle d'un ultra-trail

2016

Une recherche pédagogique, appliquée au cas du Grand-Raid, qui traite de la stratégie événementielle d'une organisation sportive au travers des jeux d'acteurs, d'une logique touristique et dans un environnement concurrentiel en développement. Le Grand-Raid/Diagonale des fous est un Ultra-trail, organisé par l'association du Grand-Raid, sur l'île de La Réunion. A l'heure où les sports de randonnée, de nature et de découverte se développent, l'étude de la stratégie événementielle d'une telle manifestation prend toute son importance.