Search results for "oie"
showing 10 items of 1669 documents
Diciannove anelli "sentimentali"
2011
Si tratta di anelli cosiddetti "sentimentali", rappresentativi dell'oreficeria popolare a stampaggio, economica e appariscente tipica del secondo Ottocento italiano
Cinque coppie di orecchini e due orecchini
2011
Gli orecchini hanno aspetti riconducibili all'oreficeria popolare siciliana, prodotta serialmente a stampaggio, tipica della seconda metà del XIX secolo
Sette anelli
2011
Si tratta di opere tipiche dell'oreficeria italiana degli anni Trenta e Quaranta del XX secolo
Quattro coppie di orecchini
2011
Si tratta della semplificazione tipologica degli orecchini tradizionali siciliani a più pendenti diffusi a partire dalla seconda metà del XVIII secolo
Aurea Jugalia. Gli ori della Madonna del Soccorso di Castellammare del Golfo
2011
Il volume, esito di una ricerca che offre nuovi e interessanti spunti alla conoscenza della storia dell'oreficeria siciliana, fornisce un'ampia rassegna tipologica di gioielli donati al simulacro della Madonna del Soccorso di Castellammare del Golfo, monili databili tra la seconda metà del XVIII secolo e la prima metà del XX, importanti e preziose testimonianze di arte e devozione.
Characterization of electronic properties of the Cr(CO)3 group in chromium, tricarbonyl [3-[(η6-aryl)methylene]-Z-1(3H)-isobenzofuranones] using spec…
1999
Abstract The IR, 13C- and 17O-NMR spectral characteristics of the Cr(CO)3 group in a series of eight chromium, tricarbonyl[3-[(η6-aryl)methylene]-Z-1(3H)-isobenzofuranones] were correlated mutually as well as with theoretical data obtained by optimized MMX force-field and EHT calculations. The net charges on the carbon and oxygen atoms of the CO group and their differences were found as the most appropriate quantitative characteristics for the electronic properties of the Cr(CO)3 group. Using the results of the previously reported linear correlations, the electron-withdrawing effect of the PhCr(CO)3 moiety, weakened by the back-donation effect, was estimated as σα≅0.45 on the scale of Hamm…
L'avventurina nei gioielli siciliani tra Seicento e Ottocento
2021
The aventurine glass between the seventeenth and nineteenth centuries was much appreciated by Sicilian women, aristocrats, bourgeois but also commoners, especially for its characteristic color
Solution versus Fluorous versus Solid-Phase Synthesis of 2,5-Disubstituted 1,3-Azoles. Preliminary Antibacterial Activity Studies
2009
A small library of compounds with an oxa(thia)zole scaffold and structural diversity in both positions 2 and 5 has been synthesized. Double acylation of a protected glycine affords intermediate α-amido-β-ketoesters, which in turn can be dehydrated to afford 1,3-oxazoles or reacted with Lawesson’s reagent to furnish 1,3-thiazoles. This procedure was designed with its adaptation to fluorous techniques in mind. Thus, when a protected glycine with a fluorous tag in the ester moiety is used as a starting material, the synthesis can be easily completed without column chromatography purification of intermediate compounds with good to excellent yields, thus affording a suitable entry to the prepara…
Systematic review and mixed treatment comparison meta-analysis of randomized clinical trials of primary oral antifungal prophylaxis in allogeneic hem…
2014
Background Antifungal prophylaxis is a promising strategy for reducing invasive fungal infections (IFIs) in allogeneic hematopoietic cell transplant (alloHCT) recipients, but the optimum prophylactic agent is unknown. We used mixed treatment comparison (MTC) meta-analysis to compare clinical trials examining the use of oral antifungals for prophylaxis in alloHCT recipients, with the goal of informing medical decision-making. Methods Randomized controlled trials (RCTs) of fluconazole, itraconazole, posaconazole, and voriconazole for primary antifungal prophylaxis were identified through a systematic literature review. Outcomes of interest (incidence of IFI/invasive aspergillosis/invasive can…
Naphthyridine Derivatives as a Model System for Potential Lithium-Sulfur Energy-Storage Applications
2015
Naphthyridines have been identified as structural elements in sulfurized polyacrylonitrile, which is a common electrode material in lithium–sulfur batteries. Some dibenzonaphthyridine derivatives with a fused dithiolo moiety were prepared as model compounds for battery studies. These heterocyclic systems were prepared via the corresponding diphenyldicarbamide intermediate. Followed by naphthyridione formation, stepwise installation of the dithiolane subunit occurred in a straightforward manner. In the solid state, the heteroaromatic system is completely planar and was thoroughly characterized. Initial battery cycling tests indicated a potential use of such structural motifs in sulfur–lithiu…