Search results for "Trees"

Genetic Structure of Wild and Cultivated Olives in the Central Mediterranean Basin

2006

Background and Aims: Olive cultivars and their wild relatives (oleasters) represent two botanical varieties of Olea europaea subsp. europaea (respectively europaea and sylvestris). Olive cultivars have undergone human selection and their area of diffusion overlaps that of oleasters. Populations of genuine wild olives seem restricted to isolated areas of Mediterranean forests, while most other wild-looking forms of olive may include feral forms that escaped cultivation. Methods: The genetic structure of wild and cultivated olive tree populations was evaluated by amplified fragment length polymorphism (AFLP) markers at a microscale level in one continental and two insular Italian regions. Key…

Olive agroforestry systems in Sicily: Cultivated typologies and secondary succession processes after abandonment

2011

The first part of this study provides an overview on Sicilian olive systems. Subsequently, the study describes the different typologies of cultivated agroforestry systems present in South-Eastern Sicily employing olive trees in association with other Mediterranean tree species, in particular for the production of firewood, coal and animal food (downy or pubescent oak, holm oak, cork oak), but also in association with forage or grazing species (oat, barley, vetch, etc.) or cereals. The study shows that Sicilian agroforestry systems are much more diversified than it was known so far. In the second part, the study describes the spontaneous colonization processes by plants, observed in abandone…

Automated Extraction of Motivic Patterns and Application to the Analysis of Debussy’s Syrinx

2009

A methodology for automated extraction of repeated patterns in discrete time series data is presented, dedicated to the discovery of musical motives in symbolic music representations. The basic principle of the approach consists in a search for closed patterns in a multi-dimensional parametric space, comprising various features related to melodic and rhythmic aspects, which can be organized into note-based and interval-based descriptions. The pattern description is further reduced through a lossless pruning of the sequence description. This requires in particular a detailed estimation of the specificity relations between patterns. For instance, a pattern is more specific than its suffix, an…

Degradation of vanillic acid and production of guaiacol by microorganisms isolated from cork samples

2003

The presence of guaiacol in cork stoppers is responsible for some cases of cork taint causing unpleasant alterations to wine. We have performed a characterization of the cork-associated microbiota by isolating 55 different microorganisms: eight yeast, 14 filamentous fungi or molds, 13 actinomycetes and 20 non-filamentous bacteria. A screening for degradation of vanillic acid and guaiacol production showed that none of the filamentous fungi could achieve any of these processes. By contrast, five of the eight yeast strains isolated were able to degrade vanillic acid, although it was not converted to guaiacol. Guaiacol production was only detected in four bacterial strains: one isolate of Baci…

I grandi alberi dei Nebrodi

2012

In questo libro sono presentati i risultati di una ricerca portata avanti dagli Autori, botanici del Dipartimento di Biologia ambientale e Biodiversità dell’Università di Palermo. L’indagine ha riguardato sia ambienti di tipo forestale sia di tipo agricolo tradizionale ed ha messo in luce un ricco patrimonio arboreo di tipo monumentale. Significative sono le immagini relative ai grandi aceri, ai ragguardevoli individui di due specie endemiche dei Nebrodi (Pyrus vallis-demonis e Malus crescimannoi) e al faggio di Fago scuro che rappresenta il patriarca di tutti i faggi d’Italia. Dopo il 150° dell’Unità d’Italia non poteva mancare il Grande Pino piantato in concomitanza dello sbarco di Giusep…

Monumenti della natura: i castagni dell'Etna - Natural monuments: Mount Etna's chestnut trees

2017

L’articolo premette l’importanza che hanno le antiche essenze arboree nel paesaggio italiano. si sofferma poi sulla necessità di un censimento continuo della conoscenza, della conservazione e della loro messa in valore e cita alcune delle normative esistenti nel territorio nazionale. Infine, tra i monumenti dal ‘naturale portento’, il saggio si sofferma sui castagni dell’Etna, che tanta meraviglia hanno suscitato tra i viaggiatori del sec. XVIII e che continuano ancora oggi a stupire ed emozionare. The article addresses the importance of ancient tree crops in the Italian landscape. It dwells on the need for a long-standing census on knowledge, preservation and promotion of these trees and q…

Evolution of worldwide stock markets, correlation structure and correlation based graphs

2011

We investigate the daily correlation present among market indices of stock exchanges located all over the world in the time period Jan 1996 - Jul 2009. We discover that the correlation among market indices presents both a fast and a slow dynamics. The slow dynamics reflects the development and consolidation of globalization. The fast dynamics is associated with critical events that originate in a specific country or region of the world and rapidly affect the global system. We provide evidence that the short term timescale of correlation among market indices is less than 3 trading months (about 60 trading days). The average values of the non diagonal elements of the correlation matrix, corre…

Tradizioni carnevalesche a Mezzojuso: dal Mastro di Campo al rogo del Nannu

2023

Il Mastro di Campo di Mezzojuso è una performance carnevalesca tradizionale che presenta un articolato simbolismo rituale riconducibile al pattern delle cerimonie di capodanno. In particolare si osservano il tema della ierogamia e della lotta rituale come elementi di promozione della fecondità. Ambedue i simboli rituali, la rappresentazione di una danza o di uno scontro armato, con l'eventuale coinvolgimento degli astanti e la celebrazione di un matrimonio, correlati o disgiunti, sono, come è noto, costitutivi ab antico delle cerimonie di capodanno, segnatamente di quelle primaverili. Altri rituali carnevaleschi europei hanno una simile articolazione. Il saggio presenta una serie di esempi …

Development of a nutritional HACCP plan.

2002

Predicting and mapping human risk of exposure to

2019

Background Tick-borne diseases have become increasingly common in recent decades and present a health problem in many parts of Europe. Control and prevention of these diseases require a better understanding of vector distribution. Aim Our aim was to create a model able to predict the distribution of Ixodes ricinus nymphs in southern Scandinavia and to assess how this relates to risk of human exposure. Methods We measured the presence of I. ricinus tick nymphs at 159 stratified random lowland forest and meadow sites in Denmark, Norway and Sweden by dragging 400 m transects from August to September 2016, representing a total distance of 63.6 km. Using climate and remote sensing environmental …