Search results for "IAC"
showing 10 items of 4189 documents
An atlas- and data-driven approach to initializing reaction-diffusion systems in computer cardiac electrophysiology
2016
The cardiac electrophysiology (EP) problem is governed by a nonlinear anisotropic reaction-diffusion system with a very rapidly varying reaction term associated with the transmembrane cell current. The nonlinearity associated with the cell models requires a stabilization process before any simulation is performed. More importantly, when used in a 3-dimensional (3D) anatomy, it is not sufficient to perform this stabilization on the basis of isolated cells only, since the coupling of the different cells through the tissue greatly modulates the dynamics of the system. Therefore, stabilization of the system must be performed on the entire 3D model. This work develops a novel procedure for the i…
Cultivable Fungal Endophytes in Roots, Rhizomes and Leaves of Posidonia oceanica (L.) Delile along the Coast of Sicily, Italy
2022
The presence of endophytic fungi in the roots, rhizomes, and leaves of Posidonia oceanica was evaluated in different localities of the Sicilian coast. Samples of roots, rhizomes, and leaves were submitted to isolation techniques, and the obtained fungal colonies were identified by morphological and molecular (rRNA sequencing) analysis. Fungal endophytes occurred mainly in roots and occasionally in rhizomes and leaves. Lulwoana sp. was the most frequent of the isolated taxa, suggesting a strong interaction with the host. In addition, eight other fungal taxa were isolated. In particular, fungi of the genus Ochroconis and family Xylariaceae were identified as endophytes in healthy plants at al…
Stymulacja rozkładu substancji ropopochodnych w skażonej glebie z wykorzystaniem nadtlenku wodoru i szczepionki Yarrowia lipolytica A101
2016
Skażenia substancjami ropopochodnymi stanowią ogromny problem, nie tylko w rolnictwie, ponieważ negatywnie wpływają na właściwości fizyko-chemiczne i aktywność biologiczną gleb. Związki te mogą się również akumulować w roślinach lub wraz z pyłem osiadać na ich zielonych częściach. Większość z nich to substancje karcenogenne, dlatego ich usuwanie ze środowiska wymaga zastosowania efektywnych, tanich i bezpiecznych metod. W warunkach laboratoryjnych oceniono przydatność łącznego wykorzystania techniki stymulacji nadtlenkiem wodoru i bioaugmentacji szczepionką drożdżową Yarrowia lipolytica A101 do oczyszczania gleby z substancji ropopochodnych oraz wpływ na dynamikę zmian mikrobioty gleby. Wyk…
Comparative efficacy of Zataria multiflora Boiss., Origanum compactum and Eugenia caryophyllus essential oils against E. coli O157:H7, feline caliciv…
2013
Abstract Ready-to-eat salads using baby-leaf and multi-leaf mixes are one of the most promising developments in the fresh-cut food industry. There is great interest in developing novel decontamination treatments, which are both safe for consumers and more efficient against foodborne pathogens. In this study, emulsions of essential oils (EOs) from Origanum compactum (oregano), Eugenia caryophyllus (clove), and Zataria multiflora Boiss (zataria) were applied by spray (0.8 ml) after the sanitizing washing step. The aim was to investigate their ability to control the growth of potentially cross-contaminating pathogens and endogenous microbiota in commercial baby leaves, processed in a fresh-cut…
LA PLASMACIÓN DEL ARTE Y DE LA CULTURA GRECOLATINA A TRAVÉS DE UNA VISIÓN JAPONESA. LOS CABALLEROS DEL ZODÍACO (SAINT SEIYA) Y SAILOR MOON
2020
Analysis of the most outstanding Greco-Latin mythological and artistic elements in Saint Seiya(The Knights of the Zodiac) by Masami Kurumada (1985) and Sailor Moonby Naoko Takeuchi (1992).
Étude de la Dynamique des Ondes Spirales à l'Échelle Cellulaire par Modèles Expérimental et Numérique
2012
Among the death due to the cardiac problems, the arrhythmias play a major role, particularly the atrial disorders. This alarming situation attracts an intense research, but it is still limited by the availability of experimental models to reproduce the triggering mechanisms of arrhythmias at the cellular level and extensions of these anomalies. Whether they occur on a healthy or pathological heart, or they are benign or potentially dangerous (risk of sudden death), the arrhythmias constitute an important chapter of the cardiology. This thesis is interested in the studying and modeling of the arrhythmias at a cellular scale. Thus the problems of this thesis can be summarized briefly by the f…
Definition of a mutual reference shape based on information theory and active contours
2013
In this paper, we propose to consider the estimation of a reference shape from a set of different segmentation results using both active contours and information theory. The reference shape is then defined as the minimum of a criterion that benefits from both the mutual information and the joint entropy of the input segmentations. This energy criterion is here justified using similarities between information theory quantities and area measures, and presented in a continuous variational framework. This framework brings out some interesting evaluation measures such as the specificity and sensitivity. In order to solve this shape optimization problem, shape derivatives are computed for each te…
A HS-SPME-GC-MS analysis of IR heated wood: Impact of the water content on the depth profile of oak wood aromas extractability
2013
http://www.sciencedirect.com/science/article/pii/S0963996913003736; International audience; Controlled and reproducible IR heat treatments were applied to oak wood surfaces in order to establish a depth-profiled picture of the extractability of volatile compounds, with particular emphasis on the impact of the initial water content. Headspace-solid phase microextraction-gas chromatography coupled to mass spectrometry (HS-SPME-GC-MS) has been used to compare the concentrations of six aroma compounds (vanillin, furfural, eugenol; guaiacol and cis- and trans-whisky lactones) in hydroalcoholic extracts of series of slices representative of the first 8 mm of the wood facing the IR source. Results…
Dry vs soaked wood: Modulating the volatile extractible fraction of oak wood by heat treatments
2012
The aim of this study was to analyze the impact of the water content of wood on the concentrations of volatile compounds which can be extracted after heat treatments. Head Space-Solid Phase Micro Extraction Gas Chromatography coupled to Mass Spectrometry (HS-SPME GC-MS) has been used to compare the concentrations of six aroma compounds (vanillin, furfural, eugenol, guaiacol and cis- and trans-whisky lactones) in hydroalcoholic extracts of heated oak wood samples either previously soaked in hot water or not. Except for eugenol, concentrations of extracted aromas appeared to be lower in soaked woods than in dry woods for temperatures up to 200 °C. If a delaying effect of water could explain s…
Diachronie, analogie et iconicité : vers un principe d'adaptation sémiologique
2014
ACL Nat Axe 3; National audience; L’on constate, en linguistique diachronique, une tendance croissante à lier les évolutions linguistiques à la notion d’iconicité. Plus précisément, plusieurs des processus du changement linguistique, comme bon nombre de ses étapes, semblent orientés en vertu d’une tendance à l’accroissement de l’iconicité dans la langue. Or, parmi ces processus, l’analogie tient un rôle particulier dans la mesure où elle est associée à une simplification du système, à une harmonisation de ses formes. Mais si l’iconicité demeure un principe usuellement situé sur le plan cognitif, ses effets se mesurent aussi sur le plan de la sémiologie, autrement dit des signes qui constitu…