Search results for "TECNOLOGIA"
showing 10 items of 1895 documents
Effect of NaOH Treatment on Properties of Phoenix Sp. Fiber
2016
The aim of this paper is to investigate the effect of an alkali treatment on physical, chemical, mechanical, and morphological properties of Phoenix Sp. fibers. The use of natural fibers as reinforcement in polymer composites requires a deep investigation to understand their behavior and which treatment is more appropriate to improve the quality of the untreated material. For this reason, fibers were extracted from the petioles of the Phoenix Sp. plant and they were treated with NaOH solution in different weight concentrations (5%, 10%, and 15%). The mechanical behavior was investigated through tensile test on single fiber at different gauge length (20 mm, 30 mm, 40 mm, 50 mm, and 60 mm). C…
Intonaci e decorazioni in terra cruda espressione di un'arte ancestrale che si rinnova nel tempo
2014
In molte aree del nostro pianeta, nel passato come oggi, la terra viene utilizzata come unico materiale nella costruzione di tutti gli elementi architettonici e strutturali di un’abitazione. Il genio creativo dei costruttori, ispirati dalla natura stessa della materia prima, si esprime nella modellazione e decorazione di forme morbide e avvolgenti che armonizzano lo spazio trasformando il manufatto in un’opera d’arte unica e irripetibile. Numerose sono le tecniche sperimentate in tutto il mondo per la realizzazione di intonaci in terra cruda sufficientemente resistenti e durevoli nel tempo; così come altrettanto numerose sono le pratiche di preparazione e stesura delle decorazioni, spesso e…
Nuove forme ed espressioni dell'architettura in terra cruda
2008
Acciaio, vetro, calcestruzzo, materie plastiche di ogni tipo sono considerati oggi, nel mondo industrializzato, materiali essenziali per la costruzione delle cosiddette “case-astronavi” realizzate nelle aree più disparate della terra, in modo selvaggio ed indiscriminato, prive di qualsiasi relazione con il contesto; edifici energivori, pressoché simili tra loro, che affidano il loro funzionamento ed il raggiungimento delle condizioni di benessere all’interno degli ambienti ad impianti tecnici sempre più sofisticati e sempre più dannosi per l’ecosistema, con ripercussioni negative sulla qualità della vita. Immagine di uno status symbol al quale oggi è sempre più difficile rinunciare. Consegu…
Novel green bio-composite geopolymeric thermo-plasters for innovative building applications: upcycling spent coffee ground
2022
This study proposes the reuse of spent coffee ground and biomass fly ash in the development of green geopolymeric thermo-plastering for innovative building applications. The former waste is the major residue of the brewing process, that is usually used as fertilisers or disposed of in landfill with extreme harmfulness for the natural environment. The latter is an industrial waste generated during the Kraft paper-pulp process, that is usually landfilled. The mortar is produced with a combination of metakaolin (30 wt.%) and biomass fly ash (70 wt.%), and natural siliceous sand filled with spent coffee ground (up to 17.5 wt.%). The high amount of reused waste makes the material an optimum cand…
Artichoke fibres as potential reinforcement of composite materials: mechanical and thermal characterization
2011
Effect of water absorption on thermal and mechanical properties of thermosetting resins for marine applications
2009
High-rise timber architecture: an opportunity for the sustainability of the built environment
2019
Bioeconomy, circular economy, land use reduction, sustainable use of natural resources, reduction of CO2 emissions in the atmosphere and recycling are the keywords which the building world must face in the near future, as the environmental emergency can no longer be postponed. In order to disseminate in the scientific community the different possibilities of timber as a sustainable building material throughout its whole life cycle and to provide the professionals with suitable decision-making tools for a conscious design, within the cultural and scientific scenario of the recent years, the paper serves as a moment of reflection highlighting how a closer integration between different sectors…
Evolutionary advantage conferred by an eukaryote-to-eukaryote gene transfer event in wine yeasts
2015
Although an increasing number of horizontal gene transfers have been reported in eukaryotes, experimental evidence for their adaptive value is lacking. Here, we report the recent transfer of a 158-kb genomic region between Torulaspora microellipsoides and Saccharomyces cerevisiae wine yeasts or closely related strains. This genomic region has undergone several rearrangements in S. cerevisiae strains, including gene loss and gene conversion between two tandemly duplicated FOT genes encoding oligopeptide transporters. We show that FOT genes confer a strong competitive advantage during grape must fermentation by increasing the number and diversity of oligopeptides that yeast can utilize as a s…
Collective participation for the sustainable redevelopment of degraded environments and urban public space
2022
The use of participatory processes as useful tools for the regeneration of the built environment is urgently topical, also in view of the inclusive forms of decision-making that have been introduced for years by ministerial and European standards. The research is part of a well-structured cultural and regulatory context characterised by new and interesting experiments in the field. Studying the participatory process as a useful strategy for conflict management and for the construction of new regenerative models in fact also implies a clarification of "what is meant by participation and the participatory project. At the same time, as widely testified to by the production of manuals in recent…