Search results for "Parti"

Bromine degassing in basaltic volcanic systems

2014

ytterbium nanoparticles: properties, recent synthesis, developments and prespectives

2011

Material science interest is more and more directed to the synthesis and characterization of nano-sized particles. This interest is justified by the fact that the reduction of the particle size of a given material to the nanometer scale causes the rising up of exotic properties that are not present in the bulk state due to size-dependent quantum effects and huge increase of the interfacial species. Further striking features can be gained by controlling nanoparticle shape or through the building up of spatially ordered mono-, bi- and three-dimensional nanoparticle arrays. Then, the wise selection of the nanoparticle synthetic strategy offers the possibility of preparing a wide class of novel…

Modeling multipartite virus evolution: the genome formula facilitates rapid adaptation to heterogeneous environments

2020

Multipartite viruses have two or more genome segments, and package different segments into different particle types. Although multipartition is thought to have a cost for virus transmission, its benefits are not clear. Recent experimental work has shown that the equilibrium frequency of viral genome segments, the setpoint genome formula (SGF), can be unbalanced and host-species dependent. These observations have reinvigorated the hypothesis that changes in genome-segment frequencies can lead to changes in virus-gene expression that might be adaptive. Here we explore this hypothesis by developing models of bipartite virus infection, leading to a threefold contribution. First, we show that th…

Contribution to thermal behaviour study of lithium-ion battery for electric and hybrid electric vehicle

2014

The main objectives of this study are to provide the essential information on the thermal behaviour of the battery cells for automotive purpose especially for EVs and HEVs through experimental work in order to develop an effective 3D electro-thermal model for lithium ion battery cells and pack. The experimental study is focusing on the distribution of temperature at various points of the battery cell surface, impact of different constant discharge rates, and also the importance of cooling system on the battery temperature behaviour. This thesis highlights the battery cell temperature under abuse discharge condition and the impact of stacking the battery cells inside the battery pack. Impact…

L'apport des restes animaux à l'analyse spatiale des sites fossoyés du second âge du Fer

1994

National audience

Compte rendu de : Hugues de Varine, L’écomusée, singulier et pluriel, Paris, L'Harmattan, 2017, 296 p.

2017

International audience

Le Public, acteur de la production d'exposition ? Un modèle écartelé entre enthousiasme et réticences

2008

L'article traite des démarches participatives dans la conception des expositions.

Évaluer un document numérique : Principes et méthodes

2010

International audience; Lors d'une démarche d'évaluation, il est nécessaire de définir ce que l'on souhaite évaluer. Pour cela, il convient de considérer que l'utilisation d'un document numérique se situe dans le contexte d'une activité menée par l'intermédiaire d'un dispositif technique. L'utilisateur se trouve donc exposé à une double contrainte, celle de devoir trouver des informations, intégrer des connaissances nouvelles sur un domaine donné, résoudre un problème, et pour ce faire, utiliser, en même temps, un dispositif technique (un document numérique développé à cet effet). On comprend que cette double contrainte et cette structure de buts vont rendre ce type de …

Ļeņina pioneeri: rakstu krājums pioneeru darbineekeem [Ļeņina pionieri...]

1925

Ŗakstu krājums izdots Jāņa Mušperta un Kārļa Priednieka redakcijā

EVALUATION OF BIODEGRADABILITY ON POLYSPARTAMIDE-POLYLACTIC ACID BASED NANOPARTICLES BY CHEMICAL HYDROLYSIS STUDIES POLYMER DEGRADATION AND STABILITY

2015

Here, the synthesis of two graft copolymers based on α,β-poly(N-2-hydroxyethyl)-D,L-aspartamide (PHEA) and poly(lactic acid) (PLA), the O-(2-aminoethyl)-O′-galactosyl polyethylene glycol (GAL-PEG-NH2) or the methoxypolyethylene glycol amine (H2N-PEG-OCH3) is described. Starting from the obtained PHEA-PLA-PEG-GAL and PHEA-PLA-PEG copolymers, polymeric nanoparticles were prepared by high pressure homogenization–solvent evaporation method. To demonstrate their biodegradability as a function of the matrix composition, a chemical stability study was carried out until 21 days by incubating systems in two media mimicking physiological compartments (pH 7.4 and pH 5.5). The degradability of both nan…