Search results for "Raphe"

Les traces de la vitesse entre réseau et territoire

2017

Les interactions entre transport et territoire sont l’objet d’une littérature scientifique permanente, questionnant les impacts économiques et démographiques d’une nouvelle infrastructure, souvent évoqués à l’échelle d’un projet. Si les études de long terme entre infrastructures de transport et croissance de la population sont nombreuses (Kasraian et al., 2016), les relations sont souvent envisagées à partir de données historiques fragmentées, venant réduire lesfenêtres de temps et d’espaces des analyses (Bretagnolle, 2014).

Optimized Deposition of Graphene Oxide Langmuir-Blodgett Thin Films

2014

Abstract Single sheet graphene (SG) is an innovative transparent material with high electrical and thermal conduction the use of which in transparent electrodes instead of traditional materials improves the performance of optoelectronic devices. In this study, graphene oxide (GO) has been obtained by a modified Hummer`s method followed by an advanced technique of water removal (lyophilisation). The Langmuir-Blodgett (LB) method was applied to transfer GO from suspension to substrate. To optimize the deposition process, as suspending and spreading solvents the benzene and benzene/methanol mixtures were chosen instead of previously studied water suspensions. The number of GO layers in suspens…

Employing Microwave Graphene Field Effect Transistors for Infrared Radiation Detection

2018

In this work, we investigate the possibility of employing graphene field effect transistors, specifically designed for microwave applications, as infrared detectors for telecom applications. Our devices have been fabricated on a sapphire substrate employing CVD-grown transferred graphene. The roles of both the gate dielectric and the DC bias conditions have been evaluated in order to maximize the infrared generated signal through an experimental investigation of the signal-to-noise ratio dependence on the transistor operating point.

Modified Graphene Sheet Stacks for Hydrogen Binding

2017

Results are partially obtained using infrastructure of Lithuanian Energy Institute with support of COST Action MP1103 “Nanostructured materials for solid-state hydrogen storage”. Latvian National Research program IMIS2 is greatly acknowledged for financial support

Structural characterization and optical constants of p-toluene sulfonic acid doped polyaniline and its composites of chitosan and reduced graphene-ox…

2020

Para-Toluene sulfonic acid doped polyaniline (PANI), PANI/chitosan composites, PANI/reduced graphene-oxide composites and a ternary composite comprising of PANI, chitosan and reduced graphene-oxide have synthesised via oxidative polymerisation of aniline by Ammonium peroxydisulfate (APS). FTIR, XRD, FESEM and UV-VIS techniques were performed for the confirmation of the successful synthesis. The fundamental optical parameters such as, complex refractive index, complex dielectric constants and optical conductivity of the PANI and the composites were investigated in the UV-VIS-NIR range. The results show a clear dependence on the constituent component such as sulphur as well as the absorbance …

Many witnesses, many layers: the digital scholarly edition of the Iudicium coci et pistoris (Anth. Lat. 199 Riese)

2014

Il progetto di ricerca messo in cantiere durante l'anno della mia borsa di studio post-doc presso il Centro Linceo Interdisciplinare “B. Segre” dell'Accademia dei Lincei prevede la creazione di un'edizione critica digitale del Iudicium coci et pistoris iudice Vulcano di Vespa (Anth. Lat. 199 Riese), un testo latino tardoantico in versi con una tradizione pluritestimoniale. Tale edizione intende mettere a frutto gli apporti della semiotica, della linguistica e di quella sua parte detta grafologia, applicando le intuizioni teoriche e metodologiche di Tito Orlandi (vd. in particolare Informatica testuale, Laterza: Roma 2010); ed applicare, innovandolo, il markup XML/TEI. In tale edizione, le f…

Graphemic complexity and multiple print-to-sound associations in visual word recognition

2005

Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands It has recently been reported that words containing a multiletter grapheme are processed slower than are words composed of single-letter graphemes (Rastle & Coltheart, 1998; Rey, Jacobs, Schmidt-Weigand, & Ziegler, 1998). In the present study, using a perceptual identification task, we found in Experiment 1 that this graphemic complexity effect can be observed while controlling for multiple print-to-sound associations, indexed by regularity or consistency. In Experiment 2, we obtained cumulative effects of graphemic complexity and regularity. These effects were replicated in Experiment 3 in a naming task. Overall, these r…

Habenular effect on hippocampal excitability is not cholinergically-mediated.

1989

Serotonergic modulation of hippocampal acetylcholine release after long-term neuronal grafting

2000

Adult female rats sustained aspirative fimbria-fornix lesions and, 2 weeks later, received intrahippocampal grafts of fetal septal or mixed septal-raphe cell suspensions. Twenty-four months later, the extracellular concentration of hippocampal acetylcholine (ACh) was determined by microdialysis. Basal ACh levels (5-65 fmol/5 microl sham-operated rats) were strongly reduced after lesioning (3-7 fmol/5 microl). In septally transplanted and septal-raphe co-transplanted rats, hippocampal ACh concentrations were restored to near-normal levels (15-25 fmol/5 microl), indicating long-term functional survival of hippocampal transplants. After administration of citalopram (100 microM by infusion) and…

Modulation of hippocampal acetylcholine release after fimbria-fornix lesions and septal transplantation in rats

1997

Abstract Female Long–Evans rats sustained electrolytic lesions of the fimbria and the dorsal fornix causing a partial lesion of the septohippocampal pathway. Two weeks later, the rats received intra-hippocampal grafts of fetal septal cell suspensions. Nine to twelve months later, the release of acetylcholine (ACh) in the hippocampus of sham-operated, lesion-only and grafted rats was measured by microdialysis. The extent of cholinergic (re)innervation was determined by acetylcholinesterase (AChE) staining and densitometry. In both lesion-only and grafted rats, the ratio of ACh release to AChE staining intensity was increased as compared to sham-operated rats, indicating a loss of endogenous …