1,721,005 research outputs found
Statue di legno. Caratteristiche tecnologiche e formali delle specie legnose
No full textIl volume raccoglie i contributi di storici dell'arte e tecnologi del legno che si sono occupati, in modo interdisciplinare, del rapporto tra dimensione cellulare delle specie legnose e lavorazione artistica del legno per statue e intagli, con particolare riferimento allo spessore dello stucco frapposto tra superficie legnosa e pigment
I legni dell’arte. L’Archivio delle Identificazioni delle Specie Legnose dei Beni Storico-Artistici
No full textIl volume raccoglie i contributi di 5 autori relativi alla inventariazione digitale dei dati relativa alle statue lignee, per lo più di età moderna, delle quali è stato effettuato il riconoscimento anatomico della specie legnos
La pulitura dei decori e dei rivestimenti lignei in architettura; indagini tecnologiche e tecnologie di intervento
No full textle lacune nel legno.Indagini sul degrado e metodologie diagnostiche in situ su antiche strutture lignee per la valutazione della capacità portante
No full textRing shake and structural characteristics of a chestnut (Castanea sativa Miller) coppice stand in northern Piedmont (northwest Italy).
No full textIn a chestnut coppice located in Torre Canavese (Province of Turin) in northwest Italy,
on a surface of 3 080 m2, a structural analysis of the population was carried out and, after coppicing,
the frequency and distribution of ring shake in stems was studied. The aim of this work was to observe
the presence of ring shake in shoots, stools and standards, and to evaluate the possible relationships
existing between these data and those characterizing the individual stems, the individual stools and the
entire population from the structural and typological standpoint. From the results, it emerges that
96.2% of standards and 37.9% of shoots are involved in the defect and only 51 % of stools present shoots
with ring shake. The distribution of ring shake in the stems is concentrated in the middle third of the radius,
and as much as 50% of the defect appears in correspondence with the growth rings for the years
1971, 1972 and 1973. The distribution of stools with shoots affected by ring shake is not uniform over
the plot
Olmi resistenti alla grafiosi. Opportunità per le piantagioni di arboricoltura da legno, esigenze della specie e caratteristiche del legno.
No full textDopo una descrizione delle esigenze ecologiche della specie e dell'attività di selezione e propagazione effettuate ai fini di ottenere individui resistenti alla grafiosi, vengono illustrate le proprietà tecnologiche del legno di alcuni cloni di olmo cresciuti nel centro e nord Itali
Cultural heritage wooden artefacts: Technical Standard UNI 11141 - guidelines for dendrochronological dating of wood
No full textIn Italy there is a standardisation working group on the problematic of wood in Cultural Heritage. This group, which is named GL20 “Cultural Heritage wooden artefacts”, is producing technical standards devoted to aspects which are every day present in professional work carried out by architects, engineers, wood technologists, archaeologists, art-historians.... In this poster the UNI standard 11141 which deals about ”guidelines for dendrochronolocail dating of wood in Cultural Heritage” is presented
Studies on the Quercus hybrids in Sicily: leaf micromorphology and xylem structure in Quercus × fontanesii Guss.
No full textIn order to find new suitable characters in the taxonomic delimitation of the genus Quercus, whose hardness is well known, Quercus x fontanesii, endemic to Sicily, has been studied in comparison with its parents, i.e. Q. gussonei, wich is close to Q. cerris, and Q. suber. These taxa are here delimited as far as taxonomy, ecology, and Sicilian distribution are concerned. Furthermore, the results of SEM microstructure analysis of leaves and xylem anatomy are illustrated and commented.
The analysis of the leaf microstructures shows that there is a remarkable similarity between the stomata and stellata trichomes of Q. x fontanesii and both the parental species, as the trichome rays are numerically intermediate in the nothotaxon. Also xylem anatomy in Q. x fontanesii results intermediate between both the parents. In particular, the qualitative analysis of the transverse sections on earlywood and latewood show that the vessel distribution in Q. xfontanesii gives origin to a structure with intermediate features between a diffuse porous wood (Q. suber) and a ring porous wood (Q. gussonei). The quantitative analysis, based on the maximum and minimum diameter, surface and shape factor, confirms the conclusion stated above. In particular, the minimum diameter of the wood vessels is the most significant parameter. The frequency distribution shows an increase in the number of vessels in Q. xfontanesii, from earlywood to latewood, differently from the two parental species
Anatomical and physical characterization of DED resistant elm clones wood grown in Italy
No full textAim of this study was the technological characterisation of two elm clones resistant to DED.
Their characteristics were compared with those of field elm to explore if their wood is suitable to satisfy the high demand of elm wood in the European market, where it is lacking from several years because of the high losses of mature trees due to the disease
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