Search results for "Ambiente"
showing 10 items of 1727 documents
Boletín ONUBIB: Marzo 2018
2018
Recurso electrónico. Publicación trimestral de novedades bibliográficas de acceso libre y texto completo, de publicaciones de la ONU y de sus Organismos Especializados.
Neolithic ceramic findings from western Sicily. Chemical – physical and mineralogical characterization
2001
This paper presents the results of a study that is part of a wider research program regarding the knowledge of the initial living phases of Sicilian agricultural and pastoral societies.Three ceramic samples attributed to the medium initial Neolithic (NEO1 and NEO2) and to the first neolithic (NEO3), recovered in two different archaeological sites of the western Sicily, have been analysed. Chemical, mineralogical and spectroscopic data point out a similarity between NEO1 and NEO3 samples; compositional and morphological differences instead have been observed in the NEO2 sample. The firing temperatures of the samples have been estimated by Mössbauer spectroscopy; they are lower than 500°C for…
High-resolution records of growth temperature and life history of two Nacella limpet species, Tierra del Fuego, Argentina
2020
Stable isotope ratios in patelloid limpets of the genus Patella have been established as proxies for coastal environmental change at sub-monthly resolution along the eastern North Atlantic and Mediterranean Sea. Nacella deaurata (Gmelin, 1791) and N. magellanica (Gmelin, 1791) are common intertidal species of patelloid limpets inhabiting the coast of Tierra del Fuego, Argentina/Chile and are commonly found in Holocene archaeological deposits. Here, we examine oxygen and carbon isotope ratios (δ18Oshell and δ13Cshell, respectively) of modern specimens of N. deaurata and N. magellanica to test the hypotheses that: 1) they form their shells in isotopic equilibrium with ambient water; and 2) pr…
Effect of Polymer Length on the Adsorption onto Aluminogermanate Imogolite Nanotubes
2021
This study evidences the adsorption of model nonionic polymers onto aluminogermanate imogolite nanotubes, attractive porous nanofillers with potential molecular loading and release applications. We resolve the underlying mechanisms between nanotubes and polyethylene glycols with different molecular weights by means of nanoisothermal titration calorimetry. The analysis of the results provides a direct thermodynamic characterization, allowing us to propose a detailed description of the energetics involved in the formation of polymer/imogolite complexes. The affinity toward the nanotube surface is enthalpy-driven and strongly depends on the polymer chain length, which significantly affects the…
Progetto Periferie, Torino. Corviale, Roma. Le Vele, Napoli
2003
Schede per l’inchiesta Periferie
Estudio de la evolución de la exposición a plomo en la población infantil española en los últimos 20 años: ¿un ejemplo no reconocido de «salud en tod…
2013
ResumenObjetivoDescribir la evolución temporal de las concentraciones de plomo en el aire en España, desde antes de su prohibición como aditivo de la gasolina hasta la actualidad, así como estudiar la evolución de la carga corporal de plomo en la población infantil española.MétodosSe obtuvieron las concentraciones medias anuales de plomo en el aire en diversas ciudades españolas, desde la década de 1980 hasta la actualidad. Se realizó una búsqueda bibliográfica con el fin de identificar estudios publicados sobre concentraciones de plomo en la población infantil española.ResultadosEn general se observó una disminución de las concentraciones de plomo, de mayor magnitud entre 1991 y 1999. Esta…
Economic analysis of the scale-up and implantation of a hollow fibre membrane contactor plant for nitrogen recovery in a full-scale wastewater treatm…
2021
[EN] Nitrogen recovery technologies such as the hollow fibre membrane contactor are now being developed. However, an economic analysis is needed prior to their full-scale application in wastewater treatment plants. The aim of this study was to analyse the economic and environmental aspects of scaling-up this method. To achieve it, a full-scale 40,000 m3·day¿1-wastewater treatment plant influent flow rate was simulated jointly with a membrane contactor plant to evaluate the minimum costs of optimum operating conditions of membrane contactors (pH, feed flow rate and membrane surface). The optimum conditions for treating 600 m3·day¿1 of reject water was found to be 10 pH, 0.08 m3·s¿1 feed flow…
La salute dei migranti
2016
Da un’analisi della letteratura sulle condizioni sociali e sanitarie dell’immigrato, si possono determinare alcune aree critiche che necessitano di particolare attenzione soprattutto in termini di programmazione e di pianificazione di politica e di comunicazione socio-sanitaria. Possiamo suddividere queste aree in tre ambiti sommariamente delimitati da alcune condizioni patologiche, fisiologiche e sociali. - condizioni patologiche: malattie infettive (tb, mst, ...), malattie dermatologiche, disagio/malattie psichiatriche, traumi e incidenti, NCD; - condizioni fisiologiche: maternità, infanzia, vecchiaia; - condizioni sociali: prostituzione e tratta, abuso, detenzione; - aggravanti: disagio …
Norme sulla tutela dell'ambiente nelle poleis greche di età pre-ellenistica
2020
This paper offers a study of fifth- and fourth-century BC epigraphical and literary documents pertaining to what we may call ‘ancient ecology’. Even though documents are not many, there is proof of laws governing cleanness and decorum of Greek cities’ public space. From the evidence it is possible to state that city institutions intervened on this matter only in few and ‘exceptional’ cases, with the aim of preventing that some particular areas of the city, which were of primary importance for the community life, got dirty. Citizens were subject to fines, if they threw in public spaces (i.e. streets) animal and human waste, or craftwork activities’. In particular, inscriptions from Athens an…
Climate Change in Literature, Television and Film from Norway
2020
Environmental and climatic change has become a frequent motif in contemporary Norwegian literature, television and film, and Norway has the worldwide first organization of writers committed to climate action (The Norwegian Writers’ Climate Campaign, founded in 2013). In this article, we argue that Norwegian climate change fiction and related works draw on elements that relate to specific national and/or Nordic cultural, societal and historical features, and that these elements give these works their distinct identity. We focus on four such features: (1) notions of “Nordicity”; (2) an (imagined) intimate connection between Norwegianness and nature, often seen as a typical element of Norwegia…