Search results for "RISA"
showing 10 items of 788 documents
Etude par spectroscopies de RMN 23Na, 31P et 1H : effets de la teneur en sel (NaCl) dans des matrices alimentaires
2008
The reduction of salt (NaCl) content in food has become a matter of public health. However, the multiple functions of salt in food make the reduction of its content difficult. The aim of this work was to demonstrate the applicability of NMR innovative techniques in order to characterise the mobility of sodium ions (distinction between ‘free’ and ‘bound’ sodium), to bring a better understanding of the role of salt in the organisation of the food matrix (in particular phosphorous molecules in dairy systems) and to study impact of salt on the mobility of aroma compounds. In a first step, the 23Na NMR study of iota-carrageenan gels validated the quantification of total sodium (Single-Quantum, S…
Potential application of yeasts from Ecuadorian chichas in controlled beer and chicha production
2021
The potential of yeasts isolated from traditional chichas as starter cultures, either for controlled production of the native beverage or for industrial beer production, has been investigated. Three S. cerevisiae strains and one T. delbrueckii strain isolated from four different Ecuadorian chichas were compared to ale and lager beer strains with respect to fermentation performance, sugar utilisation, phenolic off-flavour production, flocculation and growth at low temperature. Fermentations were performed in 15 °P all-malt wort and in a model chicha substrate at 12 °C and 20 °C. Tall-tube fermentations (1.5 L) were also performed with both substrates to assess yeast performance and beer qual…
Developing Lower secondary education: a rural issue and challenge for sub-saharan Africa
2010
The ongoing progresses of coverage of primary education in Sub-Saharan African Countries are inevitably to impact lower secondary education in a significant manner. Beyond the need for all countries to identify a global policy to deal with the problem, it is important to understand that expansion of coverage of lower secondary education will concern rural populations since coverage is generally already relatively high in cities while it is lagging noticeably in rural settings; many schools will need to be built and operate in a near future. A basic characteristic of rural schools is that most of them enroll only a limited number of students and, in current circumstances tend to cost signifi…
Les soubassements religieux de la vulgarisation scientifique dans la France du XIXè siècle
2014
International audience
Primitives detection by a discrete and non linear approach : application to the detection and caracterization of interest points for 3D meshes
2010
This manuscript is dedicated to the detection and caracterization of interest points for 3D meshes. First of all, we show the limitations of the curvature measure on sharp edges, the measure usually used for the analysis of meshes. Then, we present a generalization of the SUSAN operator for meshes, named SUSAN-3D. The saliency measure proposed quantify the local variation of the surface and classify directly the analysed vertices in five classes: salient, crest, flat, valley and cavity. The meshes under consideration are manifolds and can be closed or non-closed, regulars or irregulars, dense or not and noised or not. The accuracy of the SUSAN-3D operator is compared to two curvature operat…
Riso, potere e modelli letterari nella Coena Trimalchionis
2022
Il contributo mira ad esaminare i riferimenti al fenomeno della risata nel contesto della Coena Trimalchionis, narrata ai capp. 27-78 del Satyricon petroniano. Le occasioni di riso che si vengono a creare nel corso della cena presso il ricco liberto – contesto in cui il dislivello sociale e culturale tra i personaggi di scuola ed gli indocti è costantemente sottoposto all’attenzione del lettore – evidenziano infatti una forte distorsione delle dinamiche di potere in ambito conviviale. L’atteggiamento di scherno nei confronti dei liberti da parte degli scholastici, spesso costretti a trattenere l’ilarità di fronte alle trovate ed ai discorsi dalla profonda bassezza culturale di Trimalchione …
Hydraulic kinetics of the graft union in different Olea europaea L. scion/rootstock combinations
2007
The hydraulic resistance of young olive trees grafted on rootstocks with contrasting size-controlling potential was measured 30, 90, 360 and 480 days after grafting. Olive (Olea europaea L.) clones inducing plant vigorous growth (Leccino ‘Minerva’, LM) or dwarfing (Leccino ‘Dwarf’, LD) were studied in different scion/rootstock combinations (LD/LD, LD/LM, LM/LD, LM/LM). Plants growing on LD root systems developed lower leaf surface areas (about 50% less) than plants grafted on LM rootstocks. Graft union represented the largest fraction (up to 85%) of whole-plant hydraulic resistance 30 days after grafting, and still represented an important fraction of it 2 months later (40–55%). Four-hundre…
Scolarisation primaire universelle et pilotage par les résultats dans le contexte africain
2010
Cet article met en évidence que pour rendre compte de l'effectivité de la scolarisation primaire universelle, il est nécessaire d'avoir recours à des indicateurs qui intègrent à la fois la dimension quantitative : quelle est la proportion d'enfants qui suivent une scolarité primaire complète ? Et la dimension qualitative : est-ce que les élèves maîtrisent les compétences de base à l'issu du cycle primaire ? En suivant cette approche, de nouveaux indicateurs peuvent être pris en considération au niveau des systèmes éducatifs. Toutefois, ce questionnement permet de signaler la faiblesse actuelle du pilotage de la qualité de l'éducation dans les systèmes éducatifs africains. S'inspirant de la …
La dimension rurale des scolarisations dans les pays d'Afrique au Sud du Sahara : situation actuelle et défis pour le développement de la couverture …
2008
08065; Texte présenté lors du séminaire de l'Iredu, 28 octobre 2008. Ce texte est une version réduite d'un texte de 76 pages portant le même nom.; Dans cette étude, nous avons examiné sous divers aspects la situation de l'éducation en milieu rural, et cela dans un nombre aussi grand que possible de pays d'Afrique sub-saharienne à faible revenu. Les domaines analysés ont été de façon principale i) la scolarisation des ruraux (quelle est l'ampleur de leur retard par rapport aux urbains, et dans quels processus se construit ce retard le long du système éducatif ?) ii) l'organisation et le coût des services éducatifs en milieu rural, notamment au niveau du premier cycle de l'enseignement second…
Per una secolarizzazione della scienza. Scienziati o terrapiattisti?
2020
Le teorie scientifiche, quando pretendono di imporsi come descrizioni metafisiche del cosmo, senza l’attenta vigilanza di una disciplina critico-filosofica, rischiano di straripare in una terra di nessuno in cui nani e giganti si combattono senza regole e con la sola arma spuntata dell’opinione indiscriminata.