24 research outputs found
Tra la «Mappa per i Sette Mari» ed il «Libro della Marina.» di Piri Reis
No full textTaking advantage of the publication of the first two volumes of Kitabi Bahriye (log-book) by Piris Reis, the great man of the sea and Turkish geographer and cartographer who lived between the XVth and the XVIth century, Geo Pistarino draws a concise biography of the author. He analyses his map dated from 1513 and gives us its editorial tradition. He stresses its importance for the history of geographic discoveries and, more precisely, for those of Christopher Colombus, and he underlines some of the problems still discussed today. The map of the New World area, drawn by Piri Reis, indirectly derives from the one prepared by Christopher Colombus in 1498, during his third trip. Christopher Colombus had sent it to the Kings of Spain and it was the base of the successive «Andalusian trips». In Kitab, written in 1521 and the second version in 1525-1526, Piri informs the reader about the continent he calls «Antilles», he affirms that Genova is Christopher Colombus's homeland and makes allusions to Genova's political situation at the time.Saisissant l'occasion de la publication des deux premiers volumes du Kitabi Bahriye, (Livre de la marine) de Piri Reis, le grand homme de la mer, géographe et cartographe turc, qui vécut à cheval sur le 15eme et 16eme siècle, Geo Pistarino trace une biographie sommaire de l’auteur. Il analyse sa carte du 1513 et en donne la tradition éditoriale. Il insiste sur l’importance qu'elle a eu pour l'histoire des découvertes géographiques et tout particulièrement pour celles de Christophe Colomb, et souligne quelques problèmes encore en discussion de nos jours. La carte de la partie du Nouveau Monde, tracée par Piri Reis, dérive, indirectement, de celle dessinée par Colomb en 1498, durant son troisième voyage, qu'il avait lui-même envoyée aux Souverains d'Espagne, et que fut à la base des successifs «Voyages Andalous». Dans le Kitab, rédigé en 1521 et en 1525-26 en ce que concerne sa deuxième version, Piri informe le lecteur sur le continent qu'il appelle «Antilles»; il affirme que Gênes est la patrie de Christophe Colomb et fait allusion à la situation politique de Gênes à son époque
Propane catalytic oxidation and oxy-dehydrogenation over manganese-based metal oxides
No full textPure Mn oxides (Mn3O4 and α-Mn2O3) and Mn-Fe and Mn-Al mixed oxides have been prepared by (co)precipitation methods, thoroughly characterized and tested as catalysts for propane oxy-dehydrogenation to propene using He-O2-propane mixtures, using different flows, different contact times and different propane to oxygen molar ratios. These materials, due to their very high reactivities, allow propene production with yields not higher than 6-8 % but with productivities in excess of 3 kgC3H6 / kgCAT h and in a quite low temperature range. © 1998 Elsevier Science B.V. All rights reserved
A study of a ceria-zirconia supported manganese oxide catalyst for combustion of Diesel soot particles
No full text
Supplementa Italica n.s. vol. 25, Supplementorum Supplementa, Regio X, Brixia, Benacenses, Valles supra Benacum, Sabini, Trumplini, Camunni
No full textIntegrated analytical approach in veal calves administered the anabolic androgenic steroids boldenone and boldione: urine and plasma kinetic profile and changes in plasma protein expression
No full textSurveillance of illegal use of steroids hormones in cattle breeding is a key issue to preserve human health. To this purpose, an integrated approach has been developed for the analysis of plasma and urine from calves treated orally with a single dose of a combination of the androgenic steroids boldenone and boldione. A quantitative estimation of steroid hormones was obtained by LC-APCI-Q-MS/MS analysis of plasma and urine samples obtained at various times up to 36 and 24 h after treatment, respectively. These experiments demonstrated that boldione was never found, while boldenone α- and β-epimers were detected in plasma and urine only within 2 and 24 h after drug administration, respectively. Parallel proteomic analysis of plasma samples was obtained by combined 2-DE, MALDI-TOF-MS and μLC-ESI-IT-MS/MS procedures. A specific protein, poorly represented in normal plasma samples collected before treatment, was found upregulated even 36 h after hormone treatment. Extensive mass mapping experiments proved this component as an N-terminal truncated form of apolipoprotein A1 (ApoA1), a protein involved in cholesterol transport. The expression profile of ApoA1 analysed by Western blot analysis confirmed a significant and time dependent increase of this ApoA1 fragment. Then, provided that further experiments performed with a growth-promoting schedule will confirm these preliminary findings, truncated ApoA1 may be proposed as a candidate biomarker for steroid boldenone and possibly other anabolic androgens misuse in cattle veal calves, when no traces of hormones are detectable in plasma or urine
Contribution to the floristic knowledge of the head of the Po Valley (Piedmont, north Italy)
No full textIn 2014, the annual field trip of the working group for Floristics, Systematics, and Evolution of the Italian Botanical Society was held in Piemonte (northern Italy), at the head of the Po Valley. This valley, at whose extremity is located the Monviso (3,841 m a.s.l.), belongs to the Cottian Alps about which very little is known from a floristic point of view. An inventory of the taxa of vascular plants collected during the field trip is reported here. The research led to the identification of 3,546 exsiccata, kept in nine public and nine private collections. A total of 669 taxa belonging to 79 plant families were recorded. Six taxa resulted endemic to Italy and three exclusive to Piemonte, while only nine alien species were detected; six taxa are new and five confirmed for the regional flora
