Search results for "silica."
showing 10 items of 1087 documents
Fluorescein- and EGFR-Antibody Conjugated Silica Nanoparticles for Enhancement of Real-time Tumor Border Definition Using Confocal Laser Endomicrosco…
2019
Intraoperative definition of tumor free resection margins in head and neck cancer is challenging. In the current proof-of-principle study we evaluated a novel silica nanoparticle-based agent for its potential use as contrast enhancer. We synthesized silica nanoparticles with an average size of 45 nm and modified these particles with the fluorescence stain fluorescein isocyanate (FITC) for particle detection and with epidermal growth factor receptor (EGFR)-targeting antibodies for enhanced tumor specificity. The nanoparticles exhibited good biocompatibility and could be detected in vitro and in vivo by confocal laser scanning microscopy. Additionally, we show in an ex vivo setting that these…
The geochemistry of Tl and its isotopes during magmatic and hydrothermal processes: The peralkaline Ilimaussaq complex, southwest Greenland
2014
Abstract We use thallium (Tl) concentrations, K/Rb, K/Tl and Rb/Tl ratios and Tl isotopes in minerals from the alkaline to peralkaline Ilimaussaq complex (South Greenland) to trace magmatic differentiation, crustal assimilation, magmatic degassing, ore precipitation and hydrothermal metasomatism. Closed-system magmatic differentiation is marked by a coherent decrease of K/Tl- and K/Rb-ratios, whereas crustal assimilation results in a strong Tl-enrichment, causing low K/Tl-ratios compared to K/Rb-ratios. Thallium isotopes show only slight changes during orthomagmatic differentiation and the assimilation of crustal material cannot be traced, since the isotopic composition of the average crust…
Controlling the spatial distribution of aluminum in ZSM-5 crystals
1993
Abstract The spatial distribution of aluminum over ZSM-5 crystals was systematically studied using electron microprobing on polished crystals. Crystals synthesized with TPABr as template exhibit a pronounced enrichment of aluminum in the crystal rim, essentially irrespective of the aluminum source employed, although aluminum sources with organic anions are favoring less inhomogeneous profiles. With 1,6-hexanediol or from totally inorganic reaction gels, crystals with completely homogeneous aluminum profiles are obtained, even if the crystals grow larger than 50 μm. In the 1,6-hexanediol system the homogeneous profiles could be changed to profiles similar to the TPABr system by addition of K…
Third-harmonic generation in optical microfibers: From silica experiments to highly nonlinear glass prospects
2012
International audience; Using optical microfibers, phase matching between different propagation modes allows for third-harmonic generation (THG). After detailing the relevant phase matching conditions and overlap integrals, we provide a comparison between THG effective efficiencies in silica and tellurite glasses. We also explain the relatively easy, wideband, conversion that we observe experimentally in silica glass microfibers, from 155 mu m to the green, by the geometry of the tapering region.
Scheda IV.18, argentiere palermitano del 1757, console Giovanni Costanza, calice, argento sbalzato e cesellato, Alcamo (TP), Museo d'Arte Sacra della…
2011
Scheda storico-artistica del calice di maestranza palermitana e vidimato dal console Giovanni Costanza in carica nel 1757. La suppellettile è custodita nel Museo d'Arte Sacra della Basilica Santa Maria Assunta di Alcamo.
Scheda IV.16, argentiere palermitano del 1755, console Antonino Pensallorto, calice, argento dorato sbalzato e cesellato, Alcamo (TP), Museo d'Arte S…
2011
Scheda storico-artistica di un calice di maestranza palermitana e vidimato dal console Antonino Pensallorto in carica nel 1755. L'opera è custodita nel Museo d'Arte Sacra della Basilica Santa Maria Assunta di Alcamo.
Scheda IV.19, argentiere siciliano della metà del XVIII secolo, calice, argento sbalzato e cesellato, Alcamo (TP), Museo d'Arte Sacra della Basilica …
2011
Scheda storico-artistica del calice realizzato da maestranze siciliane della metà del XVIII secolo. L'opera è custodita nel Museo d'Arte Sacra della Basilica Santa Maria Assunta di Alcamo.
Multi-layered, covalently supported ionic liquid phase (mlc-SILP) as highly cross-linked support for recyclable palladium catalysts for the suzuki re…
2011
The reaction between an excess of 1,4-bis(3-vinylimidazolium-1-yl) bromide and a mercaptopropyl-modified amorphous silica gel or ordered mesoporous silica SBA-15 in the presence of azobisisobutyronitrile (AIBN) afforded new materials, which have a high loading of imidazolium moieties. These materials, which contain a highly cross-linked polymeric network, have been denoted as multi-layered, covalently supported ionic liquid phase (mlc-SILP) and have been used as support for palladium catalysts containing a high loading of the metal (10 wt%). Such materials were characterized by several techniques (13C magic angle spinning nuclear magnetic resonance, the Brunauer–Emmett–Teller technique, sma…
CCDC 660799: Experimental Crystal Structure Determination
2008
Related Article: T.F.Mastropietro, D.Armentano, E.Grisolia, C.Zanchini, F.Lloret, M.Julve, G.De Munno|2008|Dalton Trans.||514|doi:10.1039/b713960h
CCDC 843438: Experimental Crystal Structure Determination
2012
Related Article: N.Marino, D.Armentano, G.De Munno, J.Cano, F.Lloret, M.Julve|2012|Inorg.Chem.|51|4323|doi:10.1021/ic202740b