Search results for "camp"
showing 10 items of 1995 documents
Quantifying carbon dioxide flux from dormant volcanoes with low-temperature fumarolic activity: demonstration from measurements at La Soufrière, Guad…
2013
Quantifying the flux of magma derived CO2 dissipated by fumarolic fields at dormant volcanoes is fundamental to assess their current state of hydrothermal activity and, therefore, the likelihood of a future phreatic/magmatic eruption. There is, in fact, documented evidence that gas fluxes, and CO2 flux in particular, can increase substantially during volcanic unrests and prior to eruption, due to either degassing of new ascending magma or changes in the hydrothermal system physical regime. Quantifying CO2 emissions is relatively straightforward at open-conduit volcanoes with high-temperature gas venting, which release high enough quantities of SO2 remotely measurable with UV spectroscopy an…
• Volcanic CO2 measurements via Tunable Diode Laser Spectrometer
2014
The analysis of volcanic gas datasets offer key information to build/validate geological models relevant to a variety of volcanic processes and behaviours, including eruptions. In the last decades, near-infrared room-temperature diode lasers, though in an experimental phase, are finding applications in volcanic gas studies. Here, we report on the application of the GasFinder 2.0, a commercial tunable diode infrared laser-receiver unit, operating in the 1.3-1.7 μm wavelength range, to measuring CO2 concentrations in volcanic gas emissions. At first, our field tests were conducted in three different campaigns at Campi Flegrei volcano (near Pozzuoli, Southern Italy), and, subsequently, also in…
Glutamatergic projection from the nucleus incertus to the septohippocampal system
2012
Abstract Recent findings support a relevant role of the nucleus incertus in the control of the hippocampal activity through the modulation of theta rhythm. Previous studies from our group have shown that this nucleus is a critical relay between reticularis pontis oralis and the medial septum/diagonal band, regarded as the main activator and the pacemaker of the hippocampal oscillations, respectively. Besides, the nucleus incertus is highly linked to activated states related to the arousal response. The neurotransmission of the nucleus incertus, however, remains uncertain. Only GABA and the neuromodulator relaxin 3 are usually considered to be involved in its contribution to the septohippoca…
Postsynaptic Secretion of BDNF and NT-3 from Hippocampal Neurons Depends on Calcium–Calmodulin Kinase II Signaling and Proceeds via Delayed Fusion Po…
2007
The mammalian neurotrophins (NTs) NGF, BDNF, NT-3, and NT-4 constitute a family of secreted neuronal growth factors. In addition, NTs are implicated in several forms of activity-dependent synaptic plasticity. Although synaptic secretion of NTs has been described, the intracellular signaling cascades that regulate synaptic secretion of NTs are far from being understood. Analysis of NT secretion at the subcellular level is thus required to resolve the role of presynaptic and postsynaptic NT secretion for synaptic plasticity. Here, we transfected cultures of dissociated rat hippocampal neurons with green fluorescent protein-tagged versions of BDNF and NT-3, respectively, and identified NT vesi…
Excitotoxic Hippocampal Membrane Breakdown and its Inhibition by Bilobalide: Role of Chloride Fluxes
2003
We have previously shown that hypoxia and N-methyl-D-aspartate (NMDA) receptor activation induce breakdown of choline-containing phospholipids in rat hippocampus, a process which is mediated by calcium influx and phospholipase A (2) activation. Bilobalide, a constituent of Ginkgo biloba, inhibited this process in a potent manner (Weichel et al., Naunyn-Schmiedeberg's Arch. Pharmacol. 360, 609-615, 1999). In this study, we used fluorescence microscopy and radioactive flux measurements to show that bilobalide does not interfere with NMDA-induced calcium influx. Instead, bilobalide seems to inhibit NMDA-induced fluxes of chloride ions through ligand-operated chloride channels. In our experimen…
Architecture and 15 ka to present volcano-tectono-sedimentary evolution of the Neapolitan Yellow Tuff caldera offshore the Campi Flegrei, (Naples, Ea…
2012
The Campi Flegrei area is structurally dominated by the caldera associated with the eruption of the Neapolitan Yellow Tuff (NYT), a 40 km3 DRE ignimbrite dated at ca 15 ka BP [Deino et al., 2004], The volcanological evolution of the NYT caldera as been long described on the basis of outcrop and subsurface studies onland [Rosi & Sbrana, 1987; Orsi et al., 1996, and references therein; Di Vito et al., 1999; Perrotta et al., 2006; Fedele et al., 2011], but its offshore morphology, the stratal geometry of the volcaniclastic products and structures and the late-stage geodynamic evolution of the inner caldera resurgence are still poorly known. We integrate geological and geophysical data obtained…
Partecipazione, tv e campagna elettorale
2007
Description odontométrique comparée du campagnol souterrain d'Orgnac - Microtus (Terricola) mariaclaudiae (Chaline 1972) (Rodentia, Arvicolinae) - du…
2008
8 pages; Le campagnol souterrain d'Orgnac Microtus (Terricola) mariaclaudiae (Chaline 1972) a été décrit du gisement Pléistocène moyen d'Orgnac 3 (Ardèche, France). La comparaison de différentes variables de la première molaire inférieure avec celles d'autres espèces du sous-genre Terricola permet de caractériser la morphologie dentaire de M. (T.) mariaclaudiae et de discuter sa position phylogénétique dans le sous-genre.
Morphométrie comparée de la première molaire inférieure de différentes populations d'Europe du Pléistocène supérieur du campagnol des steppes Microtu…
2006
The comparative analysis of the first lower molar (M1) of five populations of the steppe vole Microtus gregalis (Pallas, 1779) of the Upper Pleistocene from Romania and Germany has permitted to identify criteria characterising these populations. The proposed hypothesis in order to explain the observed variations between these populations is different chronological migrations of populations of M. gregalis from different climatic and geographical regions.
Tommaso Campailla: Materia dei sogni e ipocondria di un eclettico
2007
Born on 7th April 1668 in Modica, Ciceronian 'Agrum Motucanum', the Modican county of Chiaramontes and Chiabreras, Tommaso Campailla, a poet and a physician, is mostly known as the author of a philosophical poem in octaves--Adam or the Created World. In his 1727 Problemi naturali [Natural Problems], his essay Del disordinato discorso dell'uomo [On Man's Disorderly Discourse] distinguishes itself by its intellectual wit on both the speculative and the experimental research aspects. He formulates concepts on the darkness which often reason has to fare through; he substantializes the body/soul syncretic dimension, and underlines how this disrupts the perfect bodily mechanism. His observations …