Search results for "LCA"
showing 10 items of 1995 documents
Chemical and isotopic characterization of rainwater in volcanic, urban and industrial areas of Sicily (Italy)
2021
The chemical composition of rainwater depends on (i) the dissolution of gases and particulate matter emitted by different sources, (ii) the chemical and physical reactions occurring during local and regional scale transport, and (iii) removal processes. The source of major and trace elements dissolved in rainwater can be both natural (e.g. sea salts, volcanic emissions, geogenic dust, biogenic material) and anthropogenic (e.g. industrial plants, vehicular traffic, domestic heating, vessel traffic). A group of trace elements has been recently brought to attention, especially for their possible environmental impacts, the Technology-critical elements (TCEs): Ga, Ge, In, Te, Nb, Ta, Tl, the Pla…
Questing abundance of adult taiga ticks Ixodes persulcatus and their Borrelia prevalence at the north-western part of their distribution
2020
Background Because ixodid ticks are vectors of zoonotic pathogens, including Borrelia, information of their abundance, seasonal variation in questing behaviour and pathogen prevalence is important for human health. As ticks are invading new areas northwards, information from these new areas are needed. Taiga tick (Ixodes persulcatus) populations have been recently found at Bothnian Bay, Finland. We assessed seasonal variation in questing abundance of ticks and their pathogen prevalence in coastal deciduous forests near the city of Oulu (latitudes 64–65°) in 2019. Methods We sampled ticks from May until September by cloth dragging 100 meters once a month at eight study sites. We calculated a…
The crater lake of Ilamatepec (Santa Ana) volcano, El Salvador: insights into lake gas composition and implications for monitoring
2019
We here present the first chemical characterization of the volcanic gas plume issuing from the Santa Ana crater lake, a hyper-acidic crater lake (pH of − 0.2 to 2.5) in north-western El Salvador. Our results, obtained during regular surveys in 2017 and 2018 using a Multi-GAS instrument, demonstrate a hydrous gas composition (H2O/SO2 ratios from 32 to 205) and SO2 as the main sulfur species (H2S/SO2 = 0.03–0.1). We also find that gas composition evolved during our investigated period, with the CO2/SO2 ratio decreasing by one order of magnitude from March 2017 (37.2 ± 9.7) to November 2018 (< 3). This compositional evolution toward more magmatic (SO2-rich) compositions is interpreted in the c…
Reazione infiammatoria ed isolamento di un peptide antimicrobico da Anemonia sulcata (Cnidaria)
2013
High-spectral-resolution Fabry-Pérot interferometers overcome fundamental limitations of present volcanic gas remote sensing techniques
2023
Remote sensing (RS) of volcanic gases has become a central tool for studying volcanic activity. For instance, ultraviolet (UV) skylight spectroscopy with grating spectrographs (GS) enables SO2 (and, under favourable conditions, BrO) quantification in volcanic plumes from autonomous platforms at safe distances. These measurements can serve volcanic monitoring and they cover all stages of volcanic activity in long measurement time series, which substantially contributes to the refinement of theories on volcanic degassing. Infrared (IR) remote sensing techniques are able to measure further volcanic gases (e.g., HF, HCl, CO2, CO). However, the employed Fourier transform spectrometers (FTSs) are…
El papel moderador de la inteligencia competitiva en la orientación ambidiestra de las Pymes
2017
Resumen: En los últimos años se ha generado conocimiento e investigación sobre inteligencia competitiva en organizaciones de gran tamaño pero poco se sabe del uso de ésta en empresas de pequeño tamaño y cuál es su contribución a la generación de ambidestreza organizativa en empresas frente a entornos turbulentos y mercados en declive. Basándose en la evidencia empírica en la industria del mueble en la Comunidad Valenciana en España y utilizando el Sistema de Inteligencia Competitiva Sectorial (SICM) desarrollado por el Instituto Tecnológico AIDIMA, desde 1998, el presente documento propone un trabajo de tesis de investigación orientado a construir analizar la relación entre el uso de la int…
L'évolution de la représentation des catastrophes naturelles en Méditerranée à travers la peinture. L'exemple des éruptions volcaniques en Italie aux…
2011
La Méditerranée est l'une des régions du globe les plus exposées au risque sismique du fait de deux continents qui s'y affrontent, l'Europe et l'Afrique. Toutefois, les pays de la Méditerranée occidentale sont inégalement soumis au risque sismique, tant en ce qui concerne le nombre de tremblements de terre que leur impact sur la vulnérabilité humaine. Au palmarès des principaux séismes depuis l'an mille arrivent l'Italie, suivie de loin par l'Espagne, puis par la France continentale. L'Italie étant un pays où les volcans actifs sont nombreux (on peut citer l'Etna, le Vésuve, le Stromboli ou encore Vulcano), nous nous intéresserons à l'iconographie des éruptions volcaniques italiennes aux XV…
Successioni vulcano-sedimentarie in aree di Piattaforma Carbonatica: l’esempio di Vicari e M. Balatelle (Sicilia NW)
2008
Evoluzione di sistemi deposizionali di piattaforma continentale durante il Pleistocene superiore - Olocene: analisi sedimentologica di due carote pre…
2016
E’ stato condotto uno studio sedimentologico di due carote prelevate nell’offshore della Sicilia settentrionale allo scopo di analizzare i cambiamenti di regime deposizionale verificatisi nel Pleistocene superiore - Olocene. Sulle due carote, provenienti dal Golfo di Termini Imerese (2,74 m di lunghezza, profondità -126 m) e dalla Baia di Carini (1,35 m di lunghezza, profondità -194 m), sono state anche eseguite analisi geochimiche e micropaleontologiche. Da un punto di vista granulometrico in entrambe le carote si può notare che la parte inferiore è principalmente costituita da una granulometria grossolana (ghiaia, ghiaia sabbiosa) che passa ad una granulometria di tipo argillo-siltosa nel…
Rainwater-induced leaching of selenium, arsenic and vanadium from Etnean volcanic soils
2009
Active volcanoes emit considerable amounts of contaminants such as As, Se and V. Mount Etna is the biggest volcano of Europe and an excellent geochemical site to study water-soil processes. Due to its volcanic activity, the rainwater has a strong compositional gradient, both in time and space. At present, the behaviour of trace elements in the soils around Mt Etna is poorly understood. To determine the influence of the rainwater pH on the potential mobilization of geogenic pollutants, batch experiments have been performed with synthetic rainwater for 25 soils collected along the flanks of the volcano. Our results show that: i) The maximum concentrations in the leaching solutions are higher …