Search results for "odor"
showing 10 items of 569 documents
Retro-nasal aroma release is correlated with variations in the in-mouth air cavity volume after empty deglutition.
2012
International audience; We hypothesized that interindividual differences in motor activities during chewing and/or swallowing were determining factors for the transfer of volatile aroma from the in-mouth air cavity (IMAC) toward the olfactory mucosa. In our first experiment, we looked for changes in IMAC volume after saliva deglutition in 12 healthy subjects. The mean IMAC volume was measured after empty deglutition using an acoustic pharyngometer device. Based on the time course of the IMAC volume after swallowing, we discerned two groups of subjects. The first group displayed a small, constant IMAC volume (2.26 mL ±0.62) that corresponded to a high tongue position. The second group displa…
Nucleus incertus—An emerging modulatory role in arousal, stress and memory
2011
A major challenge in systems neuroscience is to determine the underlying neural circuitry and associated neurotransmitters and receptors involved in psychiatric disorders, such as anxiety and depression. A focus of many of these studies has been specific brainstem nuclei that modulate levels of arousal via their ascending monoaminergic projections (e.g. the serotonergic dorsal raphe, noradrenergic locus ceruleus and cholinergic laterodorsal tegmental nucleus). After years of relative neglect, the subject of recent studies in this context has been the GABAergic nucleus incertus,1 which is located in the midline periventricular central gray in the ‘prepontine’ hindbrain, with broad projection…
Copiste et créateur : les paradoxes de l'écrivain romantique
2015
International audience; L’article analyse deux célèbres figures de copistes romantiques, celle d'Anselme, le héros du Vase d'or de Hoffmann (1814), et celle d'Akaki Akakiévitch, le héros du Manteau de Gogol (1843). Il s’interroge sur le rapport entre copie et création à l’époque romantique.
Nipple-sparing mastectomy and breast reconstruction with a deep inferior epigastric perforator flap using thoracodorsal recipient vessels and a low l…
2018
Background Nipple-sparing mastectomy poses challenges in providing esthetically-pleasing immediate autologous breast reconstruction. This study was to investigate the outcomes of nipple-sparing mastectomy with breast reconstruction using free abdominal flaps between two different recipient sites. Methods Between 2010 and 2016, 79 patients who underwent nipple-sparing mastectomy with autologous breast reconstruction using thoracodorsal (TD) vessels in 30 cases or internal mammary (IM) vessels in 49 cases were investigated. Demographics, intraoperative findings, complications, and quality of life using Breast-Q questionnaire were compared between two groups. Results All flap survived. There w…
Basal catalase activity and high glutathione levels influence the performance of non-Saccharomyces active dry wine yeasts.
2020
Non-Saccharomyces wine yeasts are useful tools for producing wines with complex aromas or low ethanol content. Their use in wine would benefit from their production as active dry yeast (ADY) starters to be used as co-inocula alongside S. cerevisiae. Oxidative stress during biomass propagation and dehydration is a key factor in determining ADY performance, as it affects yeast vitality and viability. Several studies have analysed the response of S. cerevisiae to oxidative stress under dehydration conditions, but not so many deal with non-conventional yeasts. In this work, we analysed eight non-Saccharomyces wine yeasts under biomass production conditions and studied oxidative stress parameter…
Footprint of carbonyl compounds in hand scent by in-tube solid-phase microextraction coupled to nano-liquid chromatography/diode array detection
2019
Abstract In the present work, the footprint of carbonyl compounds in hand scent was achieved by a miniaturized method consisting of sampling with cotton gauze, extraction and derivatization using 2,4-dinitrophenylhydrazine (DNPH) and preconcentration, separation and detection by in-tube solid-phase microextraction (IT-SPME) coupled to nano-liquid chromatography/Uv–vis diode array detection. The coupling IT-SPME-nanoLC-DAD was solved by using a two-valve system: the first valve for loading the sample and the second one to perform IT-SPME. To this aim, a nanoparticle-based capillary column was employed. Firstly, the transfer time from the load loop to the NP-based capillary column in the IT-S…
Semilinear Robin problems driven by the Laplacian plus an indefinite potential
2019
We study a semilinear Robin problem driven by the Laplacian plus an indefinite potential. We consider the case where the reaction term f is a Carathéodory function exhibiting linear growth near ±∞. So, we establish the existence of at least two solutions, by using the Lyapunov-Schmidt reduction method together with variational tools.
Expertise and memory for beers and beer olfactory compounds
2007
Abstract Do beer experts have better recognition memory for beers than novices? And can recognition memory for beers be predicted on the basis of recognition memory for beer odor compounds? We compared the memory performance of “beer experts” and novices in two recognition tasks. The first task was performed ortho- and retronasally with beers, and the second orthonasally with beer odor compounds. As a control we also compared the performance of “experts” and novices on an identification task and a same/different discrimination task. “Beer experts” outperformed novices in both the identification task and the recognition memory task with both beers and odor compounds, but only for beers they …
Two novel members of OBP family identified in the honeybee : sexual dimorphism and development studies
1998
International audience
Xenopus Laevis and Xenopus Tropicalis have different number of OBP genes : Xlaeobp and Xtroobp
2008
International audience