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silver, etc ; acidification; adsorption; nanoparticles; nitrates; pH; risk; seawater; titanium dioxide; ultrafiltration; zinc oxide; Show all 11 Subjects
Abstract:
... With an increasing production and use of engineered nanoparticles (ENPs), inevitably grows their release into the environment. This makes it important to determine in what quantitates they occur in aquatic systems like seawater. However, even when using the most sensitive ICP-MS technique, quantification of very low seawater concentrations of ENPs is still concept rather than the fact. To approach ...
silver, etc ; blood; carbon; cellulose; cupric oxide; electrochemistry; electrodes; glucose; humans; hyperglycemia; hypoglycemia; pH; Show all 12 Subjects
Abstract:
... A cellulose microfluidic pH boosting layer adapts a non-enzymatic copper oxide glucose sensor strip for neutral pH samples. This adaptation allows the non-enzymatic technology to realize in-situ glucose measurements. A three-electrode system is constructed to test samples in a classical electrochemical cell, and in a sensing strip to test the microfluidic system. The system consists of copper oxid ...
silver, etc ; antibodies; cell structures; disease diagnosis; drug development; genes; gold; humans; immune response; immunoglobulin G; nanoparticles; potassium channels; Show all 12 Subjects
Abstract:
... Research on ion channels and their monoclonal antibodies plays a critical role in drug development and disease diagnosis. The current ion channel researches are often not conducted in the microenvironment for cells survival, which restricts the mechanism study of the links between the cell structure and the ion channel function. In this work, we synthesized gold core-4-mercaptobenzonitrile-sliver ...
silver; silver chloride, etc ; carbon; commercialization; cost effectiveness; fabrics; health services; prototypes; Show all 8 Subjects
Abstract:
... Smart textiles, known also as e-textiles, are of great interest for the development of healthcare and wellness applications that require the embedding of electronic devices into the fabrics. Although many prototype proposals may be found in the literature, the generalization and commercialization of e-textiles is limited by the lack of cost-effective, standard fabrication processes that can be app ...
silver; silver nitrate, etc ; ammonia; glucose; polyamides; sulfuric acid; tannins; thermal degradation; Show all 8 Subjects
Abstract:
... A novel method for the preparation of silver plated conductive polyamide fibres (PA/Ag) based on tannic acid modification was reported in this work. The highly adhesive tannic acid was grafted onto the surface of sulphuric acid roughened polyamide fibres to sensitize the fibre. Then, the sensitized polyamide fibres were activated by low-concentration silver nitrate to form reactive centers. Chemic ...
... The biosynthesis of nanoparticles (NPs) has gained an overwhelming interest due to their biological applications. However, NPs synthesis by pigmented extreme halophiles remains underexplored. The NPs synthesis using pigmented halophiles is inexpensive and less toxic than other processes. In this study, pigmented halophilic microorganisms (n = 77) were screened to synthesize silver chloride nanopar ...
silver; silver nitrate, etc ; antimicrobial properties; biosynthesis; energy; methanogens; nanosilver; oxidoreductases; pH; Show all 9 Subjects
Abstract:
... Silver nanoparticles (AgNPs) have recently attracted worldwide consideration because of their extensive applications. Within the clean production trends, eco-friendly approaches have been provided as an alternative which require less energy consumptions and polluting chemicals. Herein, a purified protein (methyl-coenzyme M reductase D subunit, McrD) from methanogen as bio-reducing agent was used f ...
... Fluorinated tris(pyrazolyl)borate supporting ligands enable the stabilization of silver(i) bonded to a neutral, organometallic Fe(CO)₅ ligand. The Ag–Fe interaction in these molecules is mainly electrostatic in nature, but σ-donor and backbonding contributions between the two metal fragments also play notable roles, which can be modulated by the scorpionate substituents. ...
... Strengthening the flotation recovery of silver by fine grinding with special ceramic-medium stirred mill (SCSM), steel ball-medium stirred mill (SBSM) and ball mill (BM) were investigated, respectively. Grinding with SCSM exhibited better performance in terms of Ag recovery, which was approximately 2% higher than those obtained by grinding with SBSM and BM. The reduction of iron ions produced duri ...
... The reactivity of Cp*₄Sb₄ (1) towards ionic compounds and transition metal complexes with labile ligands was investigated in order to synthesize polyantimony ligand complexes. The silver salts [Ag][X] and the metalate Na[Cp*Mo(CO)₃] were primarily used, leading in the raction with Cp*₄Sb₄ to the formation of [Cp*₂Sb][X] (X = TEF (2a), FAL (2b)), [(Cp*Mo(CO)₃)₃(μ₃-Sb₃)] (3) and [Cp*Mo(CO)₂(η³-Sb₃)] ...
... The novel turn-on fluorescent chemosensors for silver ion based on nicotinonitriles, containing a tricyanobutadiene moiety (tricyanopyridine, TCPy) were developed. The enchantment of fluorescent emission can be observed by naked eye, even in the presence of interference cations. The binding mode turned out to be a 1: 1 ratio as determined using Job’s plot. ...
Nathaniel Clark; Joanne Vassallo; Patrícia V. Silva; Ana Rita R. Silva; Marta Baccaro; Neja Medvešček; Magdalena Grgić; Abel Ferreira; Martí Busquets-Fité; Kerstin Jurkschat; Anastasios G. Papadiamantis; Victor Puntes; Iseult Lynch; Claus Svendsen; Nico W. van den Brink; Cornelis A.M. van Gestel; Susana Loureiro; Richard D. Handy
... The fate of engineered nanomaterials in ecosystems is unclear. An aquatic stream mesocosm explored the fate and bioaccumulation of silver sulfide nanoparticles (Ag₂S NPs) compared to silver nitrate (AgNO₃). The aims were to determine the total Ag in water, sediment and biota, and to evaluate the bioavailable fractions of silver in the sediment using a serial extraction method. The total Ag in the ...
silver; silver sulfide, etc ; antibacterial properties; biofilm; biofouling; nanosilver; sodium bromide; solubility; stainless steel; Show all 9 Subjects
Abstract:
... This study focuses on the in-situ nucleation of silver nanoparticles (AgNPs) on stainless steel (SS) to provide a localized antibacterial action for biofouling control during space missions. Since AgNPs rapidly dissolve in water, partial passivation of AgNPs was provided to slow down silver release and extend the lifetime of the antibacterial coating. Two different passivation approaches, based on ...
silver; silver sulfide, etc ; biosolids; genes; nanosilver; nitrification; soil; soil biota; soil microorganisms; wastewater treatment; Show all 10 Subjects
Abstract:
... The use of biosolids as fertilizers in agriculture can lead to the exposure of soil biota to sulfidised silver nanoparticles (Ag₂S NPs), generated during the wastewater treatment procedures. Considering the crucial role of microorganisms on soil functions, we aimed to study the effects of 10 mg kg⁻¹ soil of Ag₂S NPs or AgNO₃ on the soil microbiome, using an indoor mesocosm. After 28 days of exposu ...
silver; silver nitrate, etc ; Daphnia magna; acute toxicity; heart rate; nanosilver; oxidative stress; titanium dioxide; Show all 8 Subjects
Abstract:
... Nanomaterials are widely believed to induce toxic effects on organisms by evoking oxidative stress. We evaluated the toxic effects of nanomaterials on the cardiac and behavioral changes in Daphnia magna under varying exposure conditions. Titanium dioxide nanoparticles (TiO₂ NPs), silver nanoparticles (AgNPs), and silver nitrate (AgNO₃) were selected for the acute toxicity tests. The adverse effect ...
silver; silver sulfide, etc ; adsorbents; adsorption; aerogels; byproducts; iodine; nuclear fuels; process design; silica; sulfates; Show all 11 Subjects
Abstract:
... While it is considered a promising adsorbent for radioiodine capture in spent nuclear fuel reprocessing off-gas, silver functionalized silica aerogel (Ag⁰-aerogel) experiences a capacity loss when exposed to other off-gas components (O₂, H₂O, NO, and NO₂) through a process known as aging. Ag₂S and Ag₂SO₄ were identified as major byproducts of aging, but their impact on iodine adsorption remains un ...
Cristina Martin; Dries Jonckheere; Eduardo Coutino-Gonzalez; Simon Smolders; Bart Bueken; Carlos Marquez; Andraž Krajnc; Tom Willhammar; Koen Kennes; Oliver Fenwick; Fanny Richard; Paolo Samorì; Gregor Mali; Johan Hofkens; Maarten B. J. Roeffaers; Dirk E. De Vos
... In this study, a water-stable microcrystalline bioMOF was synthesized, characterized, and loaded with silver ions or highly emissive rare earth (RE) metals such as Eu³⁺/Tb³⁺. The obtained materials were used as active layers in a proof-of-concept sustainable light-emitting device, highlighting the potential of bioMOFs in optoelectronic applications. ...
... We respond to Hani E. Elsayed-Ali's critique according to which silver-copper alloys produced in the Southern Levant during the Late Bronze Age III (∼1200‒1150 BCE) do not constitute forgery, as we proposed. We argue that the technical analyses of weight and reflectance suggested by Elsayed-Ali are not reliable stand-alone means for the identification of forgery in silver-copper-(arsenic) alloys, ...
silver; silver chloride, etc ; ammonia; ammonium; electrodes; nanoparticles; nitrates; nitrites; nitrogen; oxidoreductases; research; value added; wastewater; Show all 13 Subjects
Abstract:
... The biochemical reduction of nitrite (NO₂⁻) ions to ammonia (NH₃) requires six electrons and is catalyzed by the cytochrome c NO₂⁻ reductase enzyme. This biological reaction inspired scientists to explore the reduction of nitrogen oxyanions, such as nitrate (NO₃⁻) and NO₂⁻ in wastewater, to produce the more valuable NH₃ product. It is widely known that copper (Cu)-based nanoparticles (NPs) are sel ...
... Mechanochemical N-sulfenylations of sulfoximines and sulfonimidamides mediated by silver oxide under solvent-free conditions have been developed. The reactions are easy to perform and proceed well on a gram scale. A wide range of functional groups in the substrates are tolerated. Compared to its solvent-based counterpart, the mechanochemical approach shows significant ecological advantages. ...