Search results for "Analyse sensorielle"
showing 10 items of 33 documents
Le nombre de sujets dans les panels d'analyse sensorielle : une approche base de données
2012
The costs associated with sensory evaluation increase with the number of panelists to be enrolled. Classical power computation can be used to derive the minimal number of subjects of a sensory panel in order to control both type I (α risk) and type II (β risk) errors. However, this power computation requires estimates of the size of the product effect to be sought and of the residual variability of the ANOVA model used. Generally, both product effect size and residual variability are difficult to estimate a priori by the sensory analyst. This work offers estimations of these two parameters thanks to the analysis of hundreds descriptive andhedonic studies collected respectively in two databa…
On the study of the different factors influencing the structure and the texture of semi-humid baked aerated cereal products : sensory and instrumenta…
2014
Since texture is the manifestation of structural, mechanical and surface properties of a material, it represents a key characteristic for food materials. It reflects food quality, freshness perception influencing consumer acceptance.Studies encountered in the scientific literature that are devoted to cereal based foods texture are foremost based on bread also biscuits scarcely on cakes. This study entitled ‘study of the different factors influencing the structure and the texture of semi-humid baked aerated cereal products: sensory and instrumental dimensions of texture’ focus on cake softness characterization, set up and evolution. First, the investigation of the influence of soft wheat flo…
Les descripteurs sensoriels en traduction : quel degré d’équivalence cognitive ? Etude de cas français-allemand
2017
International audience; [Problématique] La plupart des langues indo-européennes sont reconnues comme étant relativement pauvres en lexique sensoriel propre. Ce faisant, les descripteurs utilisés en discours spécialisé (analyse sensorielle essentiellement) sont des mots de la langue dite « commune » ayant traversé un processus de terminologisation reflété par l’existence d’une définition faisant l’objet d’un consensus chez les experts. Si dans les terminologies de la machine-outil et des sciences de l’ingénieur, les correspondances terme à terme entre langues ne posent guère de problèmes méthodologiques, il n’en est pas de même dans le domaine visé ici. Compte tenu de la conjonction, pour ce…
La sémantique sensorielle peut-elle être autre chose qu’une sémantique expérimentale ?
2017
International audience; [Objectifs et problématique] La question au centre de la proposition est celle de savoir quel(s) cadre(s) sémantique(s) théorique(s) est / sont le(s) mieux à même de rendre justice aux contraintes génériques qui pèsent sur les terminologies sensorielles – à commencer, ici, par la terminologie œnologique. Il s’agit en effet de tenir compte de deux aspects particuliers : d’une part la dimension expérientielle de ces termes (Dubois 2009) – où expérience doit être entendu au sens très concret de l’expérience de dégustation – et, d’autre part, la dimension éminemment subjective de ces expériences que la recherche d’une intersubjectivité partagée – comme sous-bassement déf…
Le nombre de sujets dans les panels d'analyse sensorielle : une approche base de données
2012
The costs associated with sensory evaluation increase with the number of panelists to be enrolled. Classical power computation can be used to derive the minimal number of subjects of a sensory panel in order to control both type I (α risk) and type II (β risk) errors. However, this power computation requires estimates of the size of the product effect to be sought and of the residual variability of the ANOVA model used. Generally, both product effect size and residual variability are difficult to estimate a priori by the sensory analyst. This work offers estimations of these two parameters thanks to the analysis of hundreds descriptive andhedonic studies collected respectively in two databa…
Is the improvement of the nutritional quality compatible with the maintenance of the sensory quality? : the example of biscuits
2013
French biscuit producers are willing to improve the nutritional composition of their products. The. objective of this work was to determine whether it was possible while maintaining the sensory. quality of the reduced product. The first study dealt with the impact of fat and sugar reduction on liking and sensory perception of. 9 types of biscuits and cakes. Results show that children perceived almost no difference and liked. equally the standard and the fat- and/or sugar-reduced variants for most types of biscuits. For. products reduced without adding polyols, adults less like fat- or sugar-reduced variants than. standard ones mainly when they were perceived as less sweet, and to a lesser e…
L'amélioration de la qualité nutritionnelle est-elle compatible avec le maintien de la qualité sensorielle ? : l'exemple des biscuits
2013
French biscuit producers are willing to improve the nutritional composition of their products. The objective of this work was to determine whether it was possible while maintaining the sensory quality of the reduced product.The first study dealt with the impact of fat and sugar reduction on liking and sensory perception of 9 types of biscuits and cakes. Results show that children perceived almost no difference and liked equally the standard and the fat- and/or sugar-reduced variants for most types of biscuits. For products reduced without adding polyols, adults less liked fat- or sugar-reduced variants than standard ones mainly when they were perceived as less sweet, and to a lesser extent …
Effect of calculation methods and presence of false positives on perception thresholds
2023
Perception thresholds are commonly used in food science to discriminate between those compounds that are more or less odour-active. It is not rare to use values from other studies and apply them to our data, however, we observed that the procedure to evaluate and calculate perception thresholds is not standardised. The aim of this study was to explore the influence of calculation methods on threshold values. To do so, we used a 3-AFC sensory procedure to determine the orthonasal and retronasal detection values of 26 compounds, amongst them some compounds that usually contribute to the aroma of strawberry and caramel (e.g. vanillin, Furaneol and damascenone). The thresholds were calculated b…
Problématique de la verbalisation en l'analyse sensorielle
2011
Présentation de 44 pages confidentielle; International audience; Pas de résumé.