Search results for "silver"
showing 10 items of 697 documents
NanoMORALs: Metal Nanoparticles Doped with Organic Molecules
2009
A new class of nanosized metal–organic alloys (MORALs) has been synthesized for the first time. Silver nanoparticles doped with Cu(II) and Fe(III) phthalocyanines were thus synthesized in the presence of sodium dodecyl sulfate (SDS). The resulting materials were characterized by means of XRD, SEM, TEM coupled to energy dispersive X-ray analysis, and thermogravimetric analysis. No leaching of the photoactive dopant species was observed in water or in common organic solvents.
Characterization of Hydrophilic Gold(I) N-Heterocyclic Carbene (NHC) Complexes as Potent TrxR Inhibitors Using Biochemical and Mass Spectrometric App…
2017
We report here on the synthesis of a series of mono-and dinuclear gold(I) complexes exhibiting sulfonated bis(NHC) ligands and novel hydroxylated mono(NHC) Au(I) compounds, which were also examined for their 'biological activities. Initial cell viability assays show strong antiproliferative activities of the hydroxylated mono(NHC) gold compounds (8 > 9 > 10) against 2008 human ovarian cancer cells even after 1 h incubation. In order to gain insight into the mechanism of biological action of the gold compounds, their effect on the pivotal cellular target seleno-enzyme thioredoxin reductase (TrxR), involved in the maintenance of intracellular redox balance, was investigated in depth. Th…
Il tesoro della Matrice di Regalbuto tra Settecento e Ottocento
2012
The essay proposes a scientific study of the silverware of the Treasure of the Mother Church of Regalbuto made between the eighteenth and nineteenth centuries, framing them in the historical-artistic context of the time.
Aportaciones documentales sobre cruces de orfebrería valencianas. Siglos XIV y XV
2020
The article intends to make a contribution of new documentary references, from the notarial funds of the Valencian archives, in which news about parish crosses and Lignum Crucis from the silversmith center of Valencia during the fourteenth and fifteenth centuries are collected. The importance of these typologies lies in being the main elements of Christian worship, so it was an essential piece in each parish that allowed the provision in them of models of varied typology and functionality; for that reason they are conserved from altar crosses, cross-shaped reliquaries ?known as Lignum Crucis or Veracruz ?to processional crosses, larger and representative of the parish community to which it …
Exploring the self-assembly of resorcinarenes : from molecular level interactions to mesoscopic structures
2012
Mechanical and dentin bond strength properties of the nanosilver enriched glass ionomer cement
2019
Background The aim of this study was to investigate the mechanical properties and dentin microshear bond strength of a conventional glass ionomer cement (GIC) compared to GIC supplemented with silver nanoparticles (SNPs) at 0.1% and 0.2% (w/w). Material and Methods SNPs were incorporated into a conventional GIC at 0.1% and 0.2% (w/w). The unmodified GIC was used as the control group. Compressive strength, flexural strength, and micro-shear bond strength (µSBS) to dentin were evaluated using a universal testing machine. Surface microhardness was determined using a Vickers microhardness tester. The data were analyzed using one-way analysis of variance (ANOVA) and Tukey’s test. Results GICs co…
Unprecedented use of silver(I) N-heterocyclic carbene complexes for the catalytic preparation of 1,2-bis(boronate) esters.
2005
Catalytic diboration of internal and terminal alkenes with Ag(I) N-heterocyclic carbene complexes leads to 1,2-bis(boronate) esters as single intermediates, that can be oxidised towards the corresponding diols. Sanau Torrecilla, Mercedes, Mercedes.Sanau@uv.es
Valsts atbalsta pasākumi sudraba ekonomikas attīstībai Latvijā
2021
Lai runātu par sabiedrības novecošanās tendencēm un to ietekmi uz valstu ekonomikas attīstību, tiek lietots jēdziens “sudraba ekonomika”. Maģistra darbā tiek analizēti sudraba ekonomikas attīstības šķēršļi un virzītājspēki, lai identificētu prioritāros publiskās pārvaldes stimulus un atbalsta pasākumus sudraba ekonomikas attīstības veicināšanai Latvijā. Maģistra darbs sastāv no ievada, trim nodaļām, secinājumiem un priekšlikumiem. Pirmajā nodaļā autore veic teorētiskās literatūras un zinātnisko pētījumu analīzi, otrajā nodaļā tiek identificētas sudraba ekonomikas attīstības tendences un Latvijai raksturīgie problēmjautājumi, veicot statistikas datu analīzi, trešajā nodaļā, balstoties teorij…
I Ventimiglia e le arti decorative a Lascari
2016
Il saggio, attraverso l'analisi di inedite fonti archivistiche, delinea la committenza di alcuni membri della famiglia Ventimiglia per Lascari e la sua chiesa parrocchiale dalla fine del XVII secolo ai primi decenni del XIX. Gli esponenti della nobile stirpe per la realizzazione di tali opere, alcune delle quali ancora custodite, si rivolgevano perlopiù ad artisti palermitani, tra cui l'abile marmorario Domenico Magri. The essay, through the analysis of unpublished archival sources, outlines the patronage of some members of the Ventimiglia family for Lascari and its parish church from the end of the 17th century to the first decades of the 19th century. The exponents of the noble lineage fo…
Verkkojen piirtäminen Silverlightilla
2012
Silverlight-teknologialla voidaan tehdä mm. näyttäviä web- ja mobiilisovelluksia. Tutkielmassa selvitetään Silverlightin soveltuvuutta verkkojen piirto-ohjelman tekemiseen. Tutkielmassa ohjelmoitiin piirto-ohjelma, joka havainnollistaa ratsun polun etsintää shakkilaudalla. Ohjelman kehitysprosessin aikana huomattiin, että Silverlight soveltuu tutkielman mittaluokan verkoille. Silverlight-sovellus saattaa kuitenkin hidastua, jos sovellukseen tuodaan reaaliaikaisia tapahtumia vaativia tai pelimäisiä elementtejä. Tällöin voi olla järkevää vaihtaa XNA-kehitykseen Windows-ympäristössä.