1,720,983 research outputs found
Valutazione della pericolosità da caduta di massi: esempio di studio di versanti in alta Valle Orco
No full textL'articolo presenta i risultati di un metodo per la valutazione della pericolosità in aree soggette a caduta massi nell'alta Valle Orco.
Il codice di calcolo utilizzato è stato tarato con una analisi a ritroso secondo le reali condizioni del versante considerato, in siti nei quali erano evidenti la zona di distacco, la traiettoria e la zona di accumulo.
Attraverso l'analisi dei risultati, sono state ottenute zone a differente pericolosità.
È stata approfondita e integrare la caduta massi con l'analisi dell'Indice di Pericolosità (Cancelli e Crosta, 1993) caratteristico di ogni sezione.
Si è ottenuta in tal modo una carta che sintetizza le differenti pericolosità distribuite sul settore di versante considerato
Evoluzione degli Antociani e dei Flavonoidi durante la Maturazione di Uve Autoctone e Internazionali nell’ambiente della Sicilia Occidentale
No full textIn the 2006 vintage was followed the evolution of total anthocyanis and total flavonoids of skins as well as of monomer catechins, dimer procyanidins and total flavonoids of seeds of Nero d’Avola, Syrah, Merlot and Cabernet sauvignon berries, in environments of average hill of western Sicily, warm - arid during the maturation period (from 18 to 21 August the temperatures overcome 40 °C). The situation of stress, caused by the high temperatures registered in the above period, even if negatively influenced the synthesis of the anthocyanis, did not induce important variations in the profiles of these molecules that remained quite invariant especially in Nero d’Avola and Syrah. The consequences of the thermal stresses on the synthesis of the different classes of anthocyanins, were different in the Merlot and in the Cabernet sauvignon. In the Merlot was partially inhibited the synthesis of trisubstituted molecules and the expression of ipotetical p-cumaril transferase, in the Cabernet sauvignon was exalted the synthesis of trisubstituted molecules and partially inhibited the ipotetical acetil transferase. It doesn't seem that the thermal stresses have modified the evolution of catechins, dimer procyanidins and total flavonoids in seeds. The extractability of these flavonols during the maturation appeared, in fact, similar to that found in other environments with notably different climatic characteristics. In all the varieties studied, the amount of the seed undergone to an important decrease after veraison, but during the phase of stress, as well as in proximity of the harvest there were small variations
Considerazioni sulla biosintesi degli HCTA, dei flavonoli e degli antociani nell’acino d’uva
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Relazioni fra i percorsi biosintetici degli HTCA, dei flavonoli e degli antociani nell'acini d'uva
No full textImpiego della lmax del vino nel visibile come indicatore della presenza di antociani copigmentati
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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