Search results for "Legno"
showing 10 items of 112 documents
Impacts of wood extraction on soil: assessing rutting and soil compaction caused by skidding and forwarding by means of traditional and innovative me…
2021
AbstractIntensive forestry operations may cause soil compaction, plastic soil disturbances and rutting, which are responsible for undesirable effects on soils, vegetation and water bodies. Despite the numerous studies aimed to identify the main factors affecting soil damages, it still remains unclear whether wood extraction methods and driving direction (uphill or downhill) may affect the impacts of forest machines. This research analyses soil compaction and soil penetration resistance as well as rutting from forwarding and skidding using the same farm tractor in up- and downhill wood extraction. Rutting was estimated by 3D soil reconstruction derived by portable laser scanning (PLS) and cl…
Can the certification of cork management agroforestry system in Sicily help to relaunch its future management?
2019
The economic importance of cork oak forests is mainly attributable to the role of provisioning non-timber forest products. The history of human management of these cork oaks stands make them a perfect example of agroforestry system, which surface is totally included in the Mediterranean-climate zones with more than 2.3 million hectares. In Sicily, the surface covered by cork forests amounts to about 15,000 ha but the most of this area is not affected by cultural practices. The cultural abandonment of many cork oak stands threatens their survival because of the close link between the conservation of cork stands and its use for productive purposes. The abandonment reasons are related to poor …
Rilassometria NMR applicata allo studio della statua lignea di San Nicola di Mira (XVI secolo) al museo Diocesano di Palermo
2007
In un recente studio condotto mediante Rilassometria NMR del nucleo 1H su legni moderni stagionati è stato mostrato che è possibile separare la curva di rilassamento della componente longitudinale della magnetizzazione nucleare dei nuclei 1H meno mobili (componente “solida”), attribuibili alle macromolecole, da quella dei nuclei a maggior mobilità (componente “liquida”), attribuibili all’acqua. Oltre a permettere di verificare la proporzionalità diretta tra ampiezza della componente liquida del segnale e massa d’acqua, l’analisi delle curve di rilassamento mediante distribuzioni quasi-continue del tempo di rilassamento longitudinale T1 permette di classificare le essenze lignee esaminate, m…
Environmental performance of wood pellets' production through life cycle analysis
2016
Abstract Forests play a key role as the source of an essential renewable material and/or fuel: wood. The aim of this study was to evaluate the environmental impacts related to high-quality pellet production for domestic heating following the LCA (life cycle assessment) methodology and considering a cradle-to-gate perspective in the Tuscany region. This is representative and interesting for Italian pellet factories and for similar factories located in Central Europe, considering the Italian contribution to the production capacity of that area. All of the activities involved, from wood extraction in no-industrial forests to packed pellet production, ready for delivery to final users, were tak…
I soffitti lignei dipinti e le strutture di copertura nell'architettura religiosa della Sicilia barocca. Conoscenza e diagnosi per il progetto di res…
2009
Wooden ceilings characterize many baroque churches in Sicily and they have a particular meaning in the spatial conception of the architecture because of the false dome prospective painted on. For such a reason they are able to dominate the baroque architectural spatiality being a planar surface. Often forgotten and difficult to reach, the wooden painted ceilings represent an meaningful testimony of history and art but they are know asking for a conservation and maintenance attitude to start. The essay explain a method to design a conservation project without scaffolding and presents the software processing phases to develop in order to point out the degradation conditions through thermograp…
The paradox of the alien plant Leucaena leucocephala subsp. glabrata (Rose) S. Zárate in Sicily: another threat for the native flora or a valuable re…
2020
With this contribution, an updated picture of the rapid expansion of Leucaena leucocephala subsp. glabrata in Sicily is provided. On the one hand, this is a quite worrying sign, as this woody species figures among the world’s worst invasive alien species. On the other hand, the species shows interesting potential for production purposes (for wood, biomass and for feeding livestock), also considering its nitrogen fixation ability. Consequently, the two opposite options to cope with this species, i.e. cultivation and control/eradication, should accurately take into account the possible uses as well as its invasive behaviou.
La Propagazione delle piante arboree da frutto
2019
Il Capitolo tratta delle problematiche e delle tecniche di propagazione delle piante arboree da frutto
From the old agroforestry systems of the modern high-density olive groves: which Carbon sequestration?
2019
Olive tree (Olea europaea L) represents one of the most important evergreen tree species. In Sicily agroforestry systems based on the olive tree, named traditional olive orchard, are common and often are grown together to other tree crops, such as vineyards, or with cereals or forages. This last are usually grown in the interspace between rows and particularly in olive groves were planting density is rather low (less than 200 trees/ha). To increase crop efficiency and to reduce costs of harvesting, by using proper machines, in the last 20 years in the olive industry have been developed new planting systems: Intensive (up to 400 trees/ha), and the Superintensive (up to 2000 trees/ha). Within…
Artigianato e arredo
2009
Le potenzialità della filiera foresta-legno in Sicilia
2022
Dalla seconda metà del secolo scorso il patrimonio forestale della Sicilia è aumentato in termini di superficie. L’aumento recente è stato favorito dai processi di rinaturalizzazione degli ex coltivi e dei pascoli e dalla disponibilità di fondi europei per i rimboschimenti e l’arboricoltura da legno, insieme all’adozione di nuove politiche rivolte alla sostenibilità ambientale. Tuttavia, tale incremento della risorsa nella maggior parte dei casi non è stato un affiancato da uno sviluppo delle politiche e delle azioni mirate a promuovere la gestione forestale, tantomeno la valorizzazione dei prodotti legnosi e non. Tale carenza di politiche efficaci nel contesto italiano, in particolare l’ap…