192 research outputs found
Due nuove specie del genereGenistaL. nel Mediterraneo
No full textThe author describes two new species ofGenistarecorded in some areas of central Mediterranean basin
Una Nuova specie del genereGenistaL. nel Mediterraneo
No full textThe author describes one new specie ofGenistarecorded in some areas of central Mediterranean basin: Campania and Sicilian
The power of fiction and its controversies in Azar Nafisi’s portrayals of a new compliant nationality
No full textAccording to Anderson’s positions on nation and nationalism as cultural artifacts, Azar Nafisi’s literary memoirs show a controversial case study, focused on the ambiguities of the exile discourse and of the so-called «imaginative knowledge». Through the lens of a recurring celebration of Western myths of freedom, a series of stereotypes and paradoxes will be examined, in relation to the censorship experienced by the author under the Islamic Republic of Iran. Moreover, Nafisi’s juxtaposition of political and literary perspectives will be shown as an ambivalent narrative strategy, despite her search for a true self without any ideological engagement. In the end, the explored duality between oriented dissertations and pure imaginative recreations will enable to reconsider Nafisi’s memoirs as committed depictions of a Westernized national legacy
La necessità come categoria giuridica: un’ipotesi di lavoro per Jacopo Menochio
No full textNella biblioteca trivulziana di Milano si conserva, in un unico voluminoso manoscritto, il trattato De necessitate, eiusque privilegiis et prerogativis di Jacopo Menochio.L’impostazione scelta da Menochio può essere meglio compresa grazie al confronto con altri trattati cinque-seicenteschi che affrontano temi dalla stessa natura trasversale e articolata (la povertà, la malattia e simili).Benchè l’opera sia incompleta, la lettura si rivela di notevole interesse sia nella prima parte, più rifinita e meditata, dedicata all’introduzione teorica sul concetto filosofico-giuridico di necessità, sia in quella, assai più confusa e frammentaria, in cui l’autore progettava di analizzare in modo analitico i numerosi privilegia, che nell’ambito del diritto si collegano alle diverse concezioni e situazioni di necessità. Proprio il carattere disorganico del codice lo rende anzi di particolare rilievo: oltre a dare un saggio del sapere giuridico del professore pavese, alle prese con un concetto dalle molteplici sfaccettature teorico-pratiche, il testo offre una interessante visione del metodo di lavoro con il quale va costruendosi un trattato su un tema così complesso, e ci mostra il modo in cui un illustre giurista dell’età del tardo diritto comune padroneggia l’immensa mole delle fonti e delle autorità di riferimento per giungere alla soluzione di ogni possibile caso concreto.In the Trivulziana Library in Milan, the treatise De necessitate, eiusque privilegiis et prerogativis, by Jacopo Menochio, is preserved in a single voluminous manuscript.The method chosen by Menochio can be better understood through comparison with other sixteenth-seventeenth century treatises that deal with themes of the same transversal and complex nature (poverty, illness and the like).Although the work is incomplete, the reading reveals itself of considerable interest both in the first part, more refined and meditated, dedicated to the theoretical introduction on the philosophical-juridical concept of necessity, as in the much more confused and fragmentary part, in which the author planned to analytically analyze the numerous privilegia, which in the field of law are connected to the different conceptions and situations of necessity. The very disorganized nature of the code gives it a particularly significant: in addition to providing a sample of the juridic knowledge of the professor from Pavia, dealing with a concept of multiple theoretical and practical facets, the text offers an interesting vision of the working method with which a treatise on such a complex theme is being constructed, and shows us the way in which an illustrious jurist of the late ius commune era masters the immense mass of sources and reference authorities to reach the solution of every possible concrete case
Contributo alla conoscenza del genereEchium: I.Echiumdella Sardegna
No full textThe author makes in this work a survey of the species of the
genusEchium, known up to now in Sardinia, and points out some of the
problems connected with them. For some species further research in the
distribution area of the genus (with particular regard to Italy) and accurate
comparisons with similar entities are necessary in order to ascertain their
specific character, for some species their actual presence in Sardinia has to
be verified.
The following species have been recognized:E. italicumL.;E. asperrimumLam.;E. plantagineumL.;E. parviflorumMoench;E. sabulicofumPomel;E. creticumL. ssp.creticume ssp.coincyanum(Lac.) Fernandes;E. vulgareL.;E. pustulatumS. et S.
A careful study is still necessary to come to definitive conclusions onE. arenariumGuss. andE. elegansLehm
Long-term effects of perfluorinated compounds on life history parameters and genetic diversity of Chironomus riparius (Diptera, Chironomidae): a multi-generational test.
No full textPerfluoroalkyl acids in fish of Italian deep lakes: Environmental and human risk assessment
No full textDetermination of 20 PFASs in a fish species (Alosa agone) of commercial interest has been carried out in five Italian subalpine lakes to assess the risk for humans and predators for fish consumption. PFOS still presents the highest concentrations (0.9-16.6 ng g(-1) ww) among the analysed PFASs, in spite of its normative restrictions. PFOS concentrations measured in all lakes, except in Lake Maggiore, are homogeneous with an average of 3.1 +/- 1.9 ng g(-1) ww, which could be considered the "anthropogenic background concentration" of PFOS in fish of lakes located in an industrialised and urbanised region but without point sources. In Lake Maggiore, fish concentrations always exceed the EU EQSbiota (9.1 ng g(-1) ww) based on human fish consumption. Considering the effective consumption of fish in this area, an actual risk for fish consumption by humans is not evidenced, while a moderate risk of secondary poisoning for predators is highlighted. PFOA has been detected in significant concentration only in one sample in Lake Maggiore, while long chain PFCAs have been detected without significant differences among the lakes (0.3 to 2.7 ng g(-1) ww). The present study demonstrates that biota monitoring of fish can be used as a valuable tool to classify the quality status of water bodies regarding bioaccumulative PFAAs, even if the water concentrations are close to the reachable detection limits. (c) 2018 Published by Elsevier B.V
Evaluating the impact of a fluoropolymer plant on a river macrobenthic community by a combined chemical, ecological and genetic approach
No full textEffect-based monitoring is a recommended approach suggested in European Guidelines to assess the response of ecosystem affected by a pollution source, considering the effects at community, population, individual but also at suborganism level. A combined chemical, ecological and genetic approach was applied in order to assess the impact of a fluoropolymer plant on the macrobenthic community of the Northern Italian river Bormida (Piedmont region). The macrobenthic community living downstream of the industrial discharge was chronically exposed to a mixture of perfluoroalkyl substances (PFAS), with perfluorooctanoic acid as the main compound, at concentrations up to several μgL-1. Ecological assessment proved that the downstream community was not substantially different from that living upstream of the pollution source. The impact on community is not quantifiable with the traditional monitoring methods used for ecological classification under European regulation because macrobenthic communities showed only slight differences in their structure. In order to highlight effects on genetic variability of the native population, a subcellular analysis by using the AFLP (Amplified Fragment Length Polymorphism) genetic technique was applied to genotype of individuals of a selected species (Hydropsyche modesta, Trichoptera) collected in the two sampling sites. Percentage of variation between the two populations was 6.8%, a threshold compatible with a genetic drift induced in the downstream population. The genetic study carried out in field identified a significant divergence between exposed and non-exposed populations, but at present it is not possible to associate this divergence to a specific effect induced by PFAS
Life-traits analysis for evaluation of long-term effects of perfluorinated compounds (PFASs) on Chironomus riparius (Diptera, Chironomidae) under a multi-generational approach
No full textSelection of visual information for lightness judgements by eye movements
No full textWhen judging the lightness of objects, the visual system has to take into account many factors such as shading, scene geometry, occlusions or transparency. The problemthen is to estimate global lightness based on a number of local samples that differ in luminance. Here,we showthat eye fixations play a prominent role in this selection process. We explored a special case of transparency for which the visual system separates surface reflectance from interfering conditions to generate a layered image representation. Eye movements were recorded while the observers matched the lightness of the layered stimulus. We found that observers did focus their fixations on the target layer, and this sampling strategy affected their lightness perception. The effect of image segmentation on perceived lightness was highly correlated with the fixation strategy and was strongly affected whenwe manipulated it using a gaze-contingent display. Finally, we disrupted the segmentation process showing that it causally drives the selection strategy. Selection through eye fixations can so serve as a simple heuristic to estimate the target reflectance. © 2013 The Author(s) Published by the Royal Society. All rights reserved
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