117,544 research outputs found
Simultaneous determination of polyphenolic compounds in red and white grapes grown in Sardinia by high performance liquid chromatography-electron spray ionisation-mass spectrometry
No full textA new method for the identification and the quantification of nonanthocyanin phenolic compounds from six Vitis Vinifera grape varieties native to Sardinia (three native: Vermentino, Malvasia and Cannonau and three non-native types: Chardonnay, Sauvignon and Cabernet Sauvignon; Argiolas vineyard) was developed. This rapid and selective method employs LC/ESI-MS in negative mode. Different solvents extraction and different sorbents for purification were compared to the direct analysis of the initial extracts without further sample preparation. A total of 54 phenolic compounds were identified either in the freeze-dried skins or seeds, including nonflavonoids (hydroxybenzoic and hydroxycinnamic acids and their derivatives, stilbenes) and flavonoids (flavanols, flavonols, dihydroxyflavonols). (C) 2009 Elsevier B.V. All rights reserved
Algorithmic modelling processes in scan-to-BIM workflows
No full textThe benefits brought by the application of the BIM philosophy to built heritage are now widely recognised, so much so
that a closely related methodology, Heritage BIM borned. The HBIM finds practical confirmation in the so-called
Scan-to-BIM processes; the data of architectural organisms, in the form of point clouds, are the basis on which the
modelling of information is developed, to arrive at geometric models within which all the information necessary for the
reading and interpretation of the architectural artefact as well as for its preservation and management is collected. In the
paper some of the problems that arise from the application of the Scan-to-BIM processes to complex historical elements
are analysed, particularly related to the phases of creation of three-dimensional models. In addition, a reasoning is made
about how such problems can be solved or at least mitigated, thanks to the use of algorithmic modelling; the aim is to
parameterise the generative process of the models, when the model itself cannot be parametric. In order to do this, a
classic typology of historical architecture was examined: late-gothic vaulted systems
Vitamin D Status in an Italian Pediatric Cohort: Is There a Role for Tobacco Smoking Exposure?
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