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Impact of supercritical CO2 on C-phycocyanin in presence of polyethylene glycol
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Microalgal extract, an innovative treatment to control Brettanomyces in enology
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Supramolecular Chemistry Enables Radiolabeling of Proteins under Mild Conditions
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Bourgogne - Franche-Comté, Saône-et-Loire, Fleurville "Sous la Mure, Rue Buissonnière". Evolution des espaces entre pars urbana et pars rustica de la villa de "Marigny" du Ier s. av. J.-C. à la fin du IIIe s. apr. J.-C.: Rapport de fouille archéologique
No full textLe sanctuaire occidental de Mâlain/Mediolanum (Côte-d'Or). Étude intégrée d'un sanctuaire des eaux péri-urbain en territoire lingon. Rapport d'activité 2024
No full textLong‐Term Application of No‐Tillage‐Induced Greater Risk of Poor Topsoil Aeration Along a European Pedoclimatic Gradient
No full textInternational audienceABSTRACT This paper assesses the effect of long‐term contrasting tillage practices on topsoil structural characteristics critical for nitrous oxide (N 2 O) emissions and carbon sequestration across a pedoclimatic gradient. The hypotheses tested are that: (i) aeration is greater in the topsoil of ploughed (to 0.20–0.30 m depth) than in no‐till soils and (ii) the effect of tillage practice on soil functionality depends on the context, and thus varies between sites with different pedoclimatic conditions. We evaluated the topsoil characteristics of seven long‐term tillage experiments, spread along a 2600‐km transect in Europe. A total of 576 soil cores (100‐cm 3 ) were sampled from 0 to 0.10 and 0.10 to 0.20 m depths in mouldboard‐ploughed and no‐tillage treatments after harvest. The soil water content at −30, −60, and −100 hPa matric potential was measured as well as air permeability ( k a ) and relative gas diffusivity ( D s /D o ) at −100 hPa, from which soil bulk and gas transport characteristics were derived. Despite large variations in the characteristics among sites, tillage did significantly affect the characteristics across sites. The degree of compactness was less and total pore volume was greater in the ploughed than in the no‐till treatments. Still, thresholds indicating suitable conditions for root growth were largely met under both practices. The ploughed soils showed vertical stratification, with a better aeration of the 0–0.10 m soil layer compared to the 0.10–0.20 m layer. No differences were observed between the ploughed 0.10–0.20 m and no‐till layers, which were attributed to soil settlement after ploughing. While the D s /D o at 0.10–0.20 m depth was favourable for promoting N 2 O emissions, the water‐filled pore space was below suggested thresholds. Impacts of tillage on soil structural and functional characteristics were both significant and generalisable but also deviated locally. For example, D s /D o and k a generally increased with the air‐filled pore volume ( ε a ), yet sites with greater ε a did not necessarily have higher D s /D o and k a . Existing models explaining D s /D o and k a with ε a were fitted to the measured data and performed best when both depths and tillage practices were assessed altogether. Despite the limited differences at −100 hPa, anoxic conditions may in reality prevail for a longer period under no‐till than ploughing
Augmenter la masse musculaire de la personne âgée par enrichissement alimentaire : essai Fortiphy
No full textNational audienceINTRODUCTION : La dénutrition du sujet reste un problème de santé publique. Garder sa masse musculaire est un objectif de prévention de la fragilité pour prévenir la sarcopénie. OBJECTIFS: Développer et tester l’impact de recettes fortifiées sur la santé nutritionnelle des personnes âgées sans augmenter la taille des portions. MÉTHODE: Etude interventionnelle en 3 bras : enrichissement nutritionnel avec programme d’activité physique (groupe FAP) et sans (groupe FOR), et témoin (CONT) chez des PA de 70 ans ou plus, vivant à domicile. L’enrichissement nutritionnel a consisté en une « fortification alimentaire » : apport supplémentaire de 8 à 12 g de protéines et de 250 à 300 kcal/j à partir de 2 extraits de protéines commercialisés. Développement de 19 recettes salées et 11 sucrées. Entrainement physique : renforcement musculaire (livret d’exercices et suivi APA). Mesures : impédancemétrie et évaluation fonctionnelle sur 4 mois. RÉSULTATS: 192 participants (26% H/74% F) inclus, de 75,8±4,2 ans [70–90]. 76% n’avaient aucune aide à domicile. Etat de santé meilleur (31%) ou pareil (62%) que les gens de leur âge. Masses maigre et musculaire squelettique ont été augmenté dans les groupes FOR ET FAP alors qu’elles diminuaient dans le groupe CONT. Le pourcentage de personnes atteignant les apports en protéines recommandés (1 à 1.2 g/kg/j) a augmenté dans le groupe FAP (+14 %), est resté stable dans le groupe FOR (+1%) et a baissé dans le groupe CONT (-7%). L’évaluation fonctionnelle montrait une baisse significative dans le groupe CONT, alors qu’elle restait stable dans les groupes FOR et FAP (levers de chaise et TUG). La vitesse de marche n’était pas modifiée. CONCLUSIONS: Un accompagnement nutritionnel permet le maintien de la consommation de protéines et du statut nutritionnel et une augmentation de la masse musculaire. L’accompagnement en activité physique n’a pas montré de plus-value. La prévention primaire de la sarcopénie est possible par un programme simple de fortification alimentaire avec une bonne acceptabilité
Acute and chronic effects of local muscle vibration training inducing illusions on wrist strength and neurophysiological measures
No full textInternational audienceLocal muscle vibrations (LMV) acutely and chronically affect the sensorimotor system, but their effects vary depending on application conditions. The mechanisms behind repeated LMV exposure are still debated. This study investigated the chronic effects of LMV under illusion-inducing conditions on the upper limb. Nineteen healthy participants completed 9 LMV sessions (80 Hz, 20 min) over 11 days targeting the right wrist flexors. Illusions were assessed using subjective scales and EEG (alpha band desynchronization). Neurophysiological parameters (spinal, corticospinal excitabilities, and intracortical inhibition) and grip strength were evaluated before and after a control session (20-min rest) and an LMV session, as well as after 9 LMV sessions and 5 days post-protocol. Participants consistently experienced illusions throughout the protocol, with stronger perceptions during the first 15 min. However, subjective and objective measures were found to be independent. Acute LMV significantly reduced the H-reflex (-52.3% [-69.7 ; -21.0]) but did not affect strength or other neurophysiological measures. Additionally, repeated LMV exposure induced no chronic changes in strength or neural excitabilities and inhibition. While confirming acute LMV effects under illusion conditions, this study found no evidence of chronic adaptations. It also suggests that subjective and objective (EEG-based) illusion measures reflect distinct neurophysiological mechanisms