1,486 research outputs found
J.-J. Maison, La direction spirituelle d'Alexandre Vinet. 1. Serviteur et maître ; 2. La dimension de l'inconnu, Le Mont-sur-Lausanne, Ed. Ouverture, coll. « théologie et spiritualité », 1989
No full textCollange Jean-François. J.-J. Maison, La direction spirituelle d'Alexandre Vinet. 1. Serviteur et maître ; 2. La dimension de l'inconnu, Le Mont-sur-Lausanne, Ed. Ouverture, coll. « théologie et spiritualité », 1989. In: Revue d'histoire et de philosophie religieuses, 71e année n°2, Avril-juin 1991. p. 261
Chant populaire des Mutualités scolaires. Paroles de J.-B. Vinet. Musique de S. Boulnois
No full textEsprit d'Alexandre Vinet : pensées et réflexions
No full textextraites de tous ses ouvrages et de quelques manuscrits inédits rangées dans un ordre méthodique et précédées d'une préface par J.-F. AstiéMit Exlibris von Conrad Ferdinand Meyer Exemplar der Zentralbibliothek Zürich, C.F.-Meyer-BibliothekAus dem Vorbesitz von Conrad Ferdinand Meyer Exemplar der Zentralbibliothek Zürich, C.F.-Meyer-BibliothekMit handschriftlichem Besitzvermerk auf Deckel: "C. Meyer." Exemplar der Zentralbibliothek Zürich, C.F.-Meyer-Bibliothe
Bcl-2 expression in thalamus, brainstem, cerebellum and visual cortex of adult primate
No full textDue to the functional importance of Bcl-2, which acts as an anti-apoptotic protein that also affects neural differentiation and adult neurogenesis, we undertook a detailed immunohistochemical study of the distribution of this protein in the brain of squirrel monkeys. The present study describes findings obtained at thalamic, brainstem, cerebellum and visual cortex levels, and the data are compared with our previous results gathered in the same species. At thalamic level, Bcl-2-positive neurons occur in anterior, rostral intralaminar, midline and lateral habenular nuclei. The protein is also expressed in several structures associated with the ventricular system, including the subventricular zone (SVZ), the subcommissural organ, and the periventricular grey at rostral and caudal tips of the fourth ventricle. At brainstem and cerebellar levels, Bcl-2-positive neurons occur in the dorsal raphe nucleus, inferior olivary complex, and in molecular and granular layers of the cerebellum. Finally, neurons of layer IV of the striate cortex display a very strong Bcl-2 immunoreactivity that contrasts with the poor labeling of neurons in adjacent parastriate and peristriate cortices. These finding suggests that Bcl-2 plays a role in the plasticity and structural maintenance of various structures in the primate brain and indicate that the mitotically active SVZ might be more extended along the rostrocaudal axis in primates than in rodents
Expression pattern of voltage-dependent calcium channel subunits in hippocampal inhibitory neurons in mice
No full textDifferent subtypes of voltage-dependent calcium channels (VDCCs) generate various types of calcium currents that play important role in neurotransmitter release, membrane excitability, calcium transients and gene expression. Well-established differences in the physiological properties and variable sensitivity of hippocampal GABAergic inhibitory neurons to excitotoxic insults suggest that the calcium homeostasis, thus VDCC subunits expression pattern is likely different in subclasses of inhibitory cells. Using double-immunohistochemistry, here we report that in mice: 1) Cav2.1 and Cav3.1 subunits are expressed in almost all inhibitory neurons; 2) subunits responsible for the L-type calcium current (Cav1.2 and Cav1.3) are infrequently co-localized with calretinin inhibitory cell marker while Cav1.3 subunit, at least in part, tends to compensate for the low expression of Cav1.2 subunit in parvalbumin-, metabotropic glutamate receptor 1alpha- and somatostatin-immunopositive inhibitory neurons; 3) Cav2.2 subunit is expressed in the majority of inhibitory neurons except in calbindin-reactive inhibitory cells; 4) Cav2.3 subunit is expressed in the vast majority of the inhibitory cells except in parvalbumin- and calretinin-immunoreactive neurons where the proportion of expression of this subunit is considerably lower. These data indicate that VDCC subunits are differentially expressed in hippocampal GABAergic interneurons, which could explain the diversity in their electrophysiological properties, the existence of synaptic plasticity in certain inhibitory neurons and their vulnerability to stressful stimuli
Characterization and modelling of the PEKK thermomechanical and creep behavior above the glass transition temperature
No full textThe present work focuses on the characterization and the modelling of the PEKK 7002 thermomechanical behavior at temperatures between the glass transition temperature, Tg (≈160 °C), and 200 °C, as experienced in tensile, load-unload-reload and creep-recovery tests. A novel strain measurement image analysis based tool (IAT) is presented and compared with existing measurement setup, and employed for the validation of the strain measurement acquired during the thermomechanical tests. The crystallization kinetics between 165 °C and 200 °C is described and the coupling with thermomechanical solicitations is investigated. An analytical description of the identified mechanisms is proposed for the tensile, load – unload and creep-recovery solicitations and it constitutes a 1-D model of PEKK 7002, which is employed for understanding the experimental results
Assessment and simulation of the thermomechanical tensile and creep behavior of C/PEKK composites for aircraft applications above the glass transition temperature
No full textThe present work focuses on the assessment and the simulation of the thermomechanical tensile and creep behavior of Poly Ether Ketone Ketone 7002/carbon fibers composites behavior under tensile and creep solicitation between the glass transition temperature and 200 °C, via a multiscale approach starting from the behavior of the PEKK 7002 neat polymer. Tensile and creep polymer and composite experimental curves are employed to develop and validate generalized Semi – Analytical Homogenization / Localization Method for the simulation of the thermomechanical tensile and creep behavior of composite laminates. Through the employment of the model, a similarity of behavior between polymer and composites is demonstrated. The proposed algorithm capabilities of simulating the thermomechanical tensile and creep behavior of composites with different ply orientations and stacking sequences are then presented
Characterization of the subventricular zone of the adult human brain: evidence for the involvement of Bcl-2
No full textThe subventricular zone (SVZ) is an embryonic remnant that persists and remains mitotically active throughout adulthood. The rodent SVZ harbors neuronal precursors, principally in its anterior part, and generates neuroblasts that migrate tangentially into the olfactory bulb, thus forming the so-called rostral migratory stream. This study aimed at characterizing the SVZ in the human brain. Antibodies raised against the widely used SVZ molecular markers nestin, glial fibrillary acidic protein, beta-tubulin-III and polysialylated neural cell adhesion molecule, have allowed us to characterize in detail a zone similar to the rodent SVZ in humans. Virtually all portions of the lateral ventricle, as well as the ventral (hypothalamic) sector of the third ventricle, displayed immunoreactivity for most of the molecular markers. The midline region of the septum (septal recess) and the ventral portion of the SVZ displayed a particularly intense immunostaining for all SVZ markers. These two regions may represent zones of adult neurogenesis that are unique to primates. Furthermore, the anti-apoptotic protein Bcl-2 was found to be actively synthesized and co-expressed with all the other markers throughout the entire SVZ. This study reveals that a well-developed SVZ exists in the adult human brain and suggests that Bcl-2 might play an important role in the functional organization of such a system
Coupling between thermal ageing/degradation and creep behavior of PEKK and C/PEKK composites above the glass transition temperature
No full textThe present work aims at investigating the coupling between thermal ageing/degradation and creep behavior of PEKK and C/PEKK composites at 200 °C, above the glass transition temperature (which is close to 160 °C). Ageing tests were carried out at 200 °C, under 5 bar of oxygen conditioned atmosphere. DSC scans and DMA tests were carried out. Tests results discussion were supported by indentation tests and image analysis of the aged specimen cross-section. Coupled oxidation-thermomechanical-creep tests were carried out on C/PEKK samples at 200 °C under a 5 bar O2 environment. The resulting strain response was compared to creep tests carried out on C/PEKK samples at 200 °C under air at similar creep stress. Such comparison allowed to investigate the presence of degradation phenomena in C/PEKK samples. The analysis of X-rays μ-tomography scans allowed investigating the possible occurrence of degradation, and to discriminate between pure thermal and thermomechanical coupling with degradation phenomena
Outlines of philosophy and literature,
No full textEdited by M.Astié.- cf.Note by the publisher."Extracts from the various works of M. Vinet ... put together by the editor M. Astie": p. [v]Mode of access: Internet
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