Search results for " silver"
showing 10 items of 71 documents
Developing Antibiofilm Fibrillar Scaffold with Intrinsic Capacity to Produce Silver Nanoparticles
2022
The development of biomedical systems with antimicrobial and antibiofilm properties is a difficult medical task for preventing bacterial adhesion and growth on implanted devices. In this work, a fibrillar scaffold was produced by electrospinning a polymeric organic dispersion of polylactic acid (PLA) and poly(α,β-(N-(3,4-dihydroxyphenethyl)-L-aspartamide-co-α,β-N-(2-hydroxyethyl)-L-aspartamide) (PDAEA). The pendant catechol groups of PDAEA were used to reduce silver ions in situ and produce silver nanoparticles onto the surface of the electrospun fibers through a simple and reproducible procedure. The morphological and physicochemical characterization of the obtained s…
PVC silver zeolite composites with antimicrobial properties
2011
Poly(vinyl chloride) (PVC) composites containing increasing amounts (2-20%, w/w) of silver zeolite (SZ) were prepared by melt mixing and characterized by thermal, mechanical and rheological analyses. The addition of large amount of SZ did not influence the processability and the formability of the composites, if compared to neat plasticized PVC. The antibacterial activity of PVC SZ composites was tested on Escherichia coli and Staphylococcus epidermidis and resulted promising both in culture broth and on agar plate and also in sterile urine seeded with these strains, for simulation purposes. In sterile urine, composites induced a significant reduction (4-6 log units) of viability of both st…
CCDC 2155456: Experimental Crystal Structure Determination
2022
Related Article: Estefanía Tiburcio, Yongkun Zheng, Marta Mon, Nuria Martín, Jesús Ferrando−Soria, Donatella Armentano, Antonio Leyva−Pérez, Emilio Pardo|2022|Inorg.Chem.|61|11796|doi:10.1021/acs.inorgchem.2c01508
CCDC 2155455: Experimental Crystal Structure Determination
2022
Related Article: Estefanía Tiburcio, Yongkun Zheng, Marta Mon, Nuria Martín, Jesús Ferrando−Soria, Donatella Armentano, Antonio Leyva−Pérez, Emilio Pardo|2022|Inorg.Chem.|61|11796|doi:10.1021/acs.inorgchem.2c01508
Otolith chemical composition suggests local populations of Antarctic silverfish Pleuragramma antarctica (Boulenger, 1902) around Antarctica are expos…
2021
The Antarctic silverfish Pleuragramma antarctica is a key species in the Southern Ocean ecosystem, and it is potentially threatened by the climate change affecting Antarctic ecosystems. Assessing the possible exposure to similar or different environmental conditions at early life stages and gathering information about connectivity or segregation between local populations of P. antarctica can be key for planning sound management strategies for this species. By using Laser Ablation Inductively Coupled Plasma Mass Spectrometry, we characterized the otolith chemical composition of 163 adult Antarctic silverfish collected from three areas located thousands of kilometers apart from each other: Ca…
ANDREA GIACOBBE, UN SELVICOLTORE CHE MERITA DI USCIRE DALL'OBLIO
2021
Andrea Giacobbe, a forester who deserves to get out from oblivion. The scientific production of Andrea Giacobbe, a Sicilian forester who worked in central and northern Italy in the last century, has been revisited. The aim is to highlights how his contribution to botany, forest ecology and forestry has been largely overlooked. He was the protagonist of a lively debate with the greatest for est scientists of his time, he produced 64 papers and books, but above all he proposed many inno vative reforestation techniques that today should be rediscovered and applied.
Il baculo pastorale “gaginesco” di Paolo Gili per il monastero normanno di San Michele Arcangelo a Mazara del Vallo
2019
Il saggio analizza un baculo pastorale in argento realizzato da Paolo Gili, argentiere palermitano, nella prima metà del XVI secolo, che presenta elenenti tardo-gotici e rinascimentali, proveniente dal monastero benedettino intitolato a San Michele Arcangelo di Mazara del Vallo The essay analyzes an abbatial crozier in silver made by Paolo Gili, silversmith from Palermo, in the first half of the sixteenth century, which presents late-Gothic and Renaissance lists, from the Benedictine monastery dedicated to St. Michael the Archangel of Mazara del Vallo
Il turibolo architettonico tardogotico dal monastero olivetano di San Leonardo a Chiusa Sclafani
2019
Il saggio analizza una suppellettile liturgica in argento di produzione siciliana, della seconda metà del XVI secolo, ma stilisticamente ancora tardo-gotica, proveniente dal monastero olivetano intitolato a San Leonardo di Chiusa Sclafani The essay analyzes a silver liturgical furnishings of Sicilian production, of the second half of the sixteenth century, but stylistically still late gothic, from the Olivetan monastery dedicated to St. Leonard of Chiusa Sclafani
Solid phase extraction materials as a key for improving the accuracy of silver nanoparticle characterization with single-particle inductively coupled…
2022
The accurate characterization of silver nanoparticles (Ag NPs) in environmental samples is crucial for understanding the potential impact of these materials on the environment and human health. Single-particle inductively coupled plasma mass spectrometry (spICP-MS) is one of the few techniques available for quantifying NPs at environmentally relevant concentrations. However, the spICP-MS detection of Ag NPs can be interfered with coexisting dissolved analyte causing high background signals, which mask NP signals leading to a significant bias in NP characterization. In this paper, a simple sample pre-treatment procedure for efficient removal of dissolved silver in natural waters is proposed …
Rayleigh-instability-driven dewetting of thin Au and Ag films on indium-tin-oxide surface under nanosecond laser irradiations
2013
Investigations have been carried out on laser-beam-induced nanoparticle (NP) formation in thin (5 nm) Au and Ag films on indium-tin-oxide substrate. After the irradiation the films were observed to break-up into NPs through a dewetting mechanism. This mechanism was investigated as a Rayleigh-instability- driven process. In fact, for each used laser fluence, the resulting Au and Ag NPs' mean size and surface-to-surface mean distance were quantified and correlated between them in the framework of the Rayleigh-instability theory showing an excellent agreement. © The Institution of Engineering and Technology 2013.