scholarly journals Metal Ion Release in Bastnaesite Flotation System and Implications for Flotation

Minerals ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 203 ◽  
Author(s):  
Shiming Cao ◽  
Yijun Cao ◽  
Zilong Ma ◽  
Yinfei Liao
Keyword(s):  
Metal Ion ◽  
Ion Release ◽  
Metal Ion Release ◽  
Bastnaesite Flotation

scholarly journals Bioactive Plasma Coatings on Orthodontic Brackets: In Vitro Metal Ion Release and Cytotoxicity

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 857
Author(s):  
Lasni Samalka Kumarasinghe ◽  
Neethu Ninan ◽  
Panthihage Ruvini Lakshika Dabare ◽  
Alex Cavallaro ◽  
Esma J. Doğramacı ◽  
...  
Keyword(s):  
Metal Ion ◽  
Prolonged Exposure ◽  
Orthodontic Brackets ◽  
Plasma Polymer ◽  
Functional Coatings ◽  
Key Factors ◽  
Ion Release ◽  
Metal Ion Release ◽  
Surface Functionalisation

The metal ion release characteristics and biocompatibility of meta-based materials are key factors that influence their use in orthodontics. Although stainless steel-based alloys have gained much interest and use due to their mechanical properties and cost, they are prone to localised attack after prolonged exposure to the hostile oral environment. Metal ions may induce cellular toxicity at high dosages. To circumvent these issues, orthodontic brackets were coated with a functional nano-thin layer of plasma polymer and further immobilised with enantiomers of tryptophan. Analysis of the physicochemical properties confirmed the presence of functional coatings on the surface of the brackets. The quantification of metal ion release using mass spectrometry proved that plasma functionalisation could minimise metal ion release from orthodontic brackets. Furthermore, the biocompatibility of the brackets has been improved after functionalisation. These findings demonstrate that plasma polymer facilitated surface functionalisation of orthodontic brackets is a promising approach to reducing metal toxicity without impacting their bulk properties.

scholarly journals A New Nanocomposite Packaging Based on LASiS-Generated AgNPs for the Preservation of Apple Juice

Antibiotics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 760
Author(s):  
Maria Chiara Sportelli ◽  
Antonio Ancona ◽  
Annalisa Volpe ◽  
Caterina Gaudiuso ◽  
Valentina Lavicita ◽  
...  
Keyword(s):  
Metal Ion ◽  
Chemical Characterization ◽  
Average Diameter ◽  
Biological Action ◽  
Metal Species ◽  
Ion Release ◽  
Bioactive Materials ◽  
Transmission Electron ◽  
Metal Ion Release ◽  
Bulk Chemical

Designing bioactive materials, with controlled metal ion release, exerting a significant biological action and associated to low toxicity for humans, is nowadays one of the most important challenges for our community. The most looked-for nanoantimicrobials are capable of releasing metal species with defined kinetic profiles, either by slowing down or inhibiting bacterial growth and pathogenic microorganism diffusion. In this study, laser ablation synthesis in solution (LASiS) has been used to produce bioactive Ag-based nanocolloids, in isopropyl alcohol, which can be used as water-insoluble nano-reservoirs in composite materials like poly(3-hydroxybutyrate-co-3-hydroxyvalerate). Infrared spectroscopy was used to evaluate the chemical state of pristine polymer and final composite material, thus providing useful information about synthesis processes, as well as storage and processing conditions. Transmission electron microscopy was exploited to study the morphology of nano-colloids, along with UV-Vis for bulk chemical characterization, highlighting the presence of spheroidal particles with average diameter around 12 nm. Electro-thermal atomic absorption spectroscopy was used to investigate metal ion release from Ag-modified products, showing a maximum release around 60 ppb, which ensures an efficient antimicrobial activity, being much lower than what recommended by health institutions. Analytical spectroscopy results were matched with bioactivity tests carried out on target microorganisms of food spoilage.

scholarly journals Metallic Implants: Atomic Scale Origin of Metal Ion Release from Hip Implant Taper Junctions (Adv. Sci. 5/2020)

2020 ◽  
Vol 7 (5) ◽  
pp. 2070027
Author(s):  
Shanoob Balachandran ◽  
Zita Zachariah ◽  
Alfons Fischer ◽  
David Mayweg ◽  
Markus A. Wimmer ◽  
...  
Keyword(s):  
Metal Ion ◽  
Atomic Scale ◽  
Ion Release ◽  
Hip Implant ◽  
Metallic Implants ◽  
Metal Ion Release

Surface properties and cell response of low metal ion release Ti-6Al-7Nb alloy after multi-step chemical and thermal treatments

Biomaterials ◽  
2005 ◽  
Vol 26 (11) ◽  
pp. 1219-1229 ◽  
Author(s):  
Silvia Spriano ◽  
Michela Bosetti ◽  
Marco Bronzoni ◽  
Enrica Vernè ◽  
Giovanni Maina ◽  
...  
Keyword(s):  
Surface Properties ◽  
Cell Response ◽  
Metal Ion ◽  
Thermal Treatments ◽  
Ion Release ◽  
Metal Ion Release

scholarly journals A Zinc(II) Photocage Based on a Decarboxylation Metal Ion Release Mechanism for Investigating Homeostasis and Biological Signaling

2015 ◽  
Vol 54 (44) ◽  
pp. 13027-13031 ◽  
Author(s):  
Prem N. Basa ◽  
Sagar Antala ◽  
Robert E. Dempski ◽  
Shawn C. Burdette
Keyword(s):  
Metal Ion ◽  
Release Mechanism ◽  
Ion Release ◽  
Metal Ion Release

SMART Biosensor for Early Diagnostic Detection of Metal Ion Release in Orthopedic Patients: Initial Outcome

2018 ◽  
Vol 4 (4) ◽  
Author(s):  
Mathew T. Mathew ◽  
Thymur Chaudhary ◽  
Michael Jacobs ◽  
Divya Bijukumar ◽  
Markus A. Wimmer ◽  
...  
Keyword(s):  
Metal Ion ◽  
Ion Release ◽  
Metal Ion Release ◽  
Initial Outcome ◽  
Orthopedic Patients ◽  
Diagnostic Detection ◽  
Early Diagnostic

Cobalt-chromium alloys in dentistry: An evaluation of metal ion release

2015 ◽  
Vol 114 (4) ◽  
pp. 602-608 ◽  
Author(s):  
Maria Claudia Lucchetti ◽  
Giovanni Fratto ◽  
Federica Valeriani ◽  
Elisabetta De Vittori ◽  
Saverio Giampaoli ◽  
...  
Keyword(s):  
Metal Ion ◽  
Cobalt Chromium ◽  
Ion Release ◽  
Chromium Alloys ◽  
Metal Ion Release

11 Understanding the Clinical Performance of Ceramic Coated Femoral Components in Knee Arthroplasty Surgery

2021 ◽  
Vol 108 (Supplement_6) ◽  
Author(s):  
H Khatkar ◽  
M Prokopenko
Keyword(s):  
Knee Arthroplasty ◽  
Metal Ion ◽  
Clinical Performance ◽  
Ceramic Coatings ◽  
Wear Properties ◽  
Ion Release ◽  
Metal Ion Release ◽  
Knee Arthroplasty Surgery ◽  
Arthroplasty Surgery

Abstract Aim In vitro knee simulation has demonstrated favourable wear properties and decreased metal ion release of ceramic coated metal femoral components in total knee arthroplasty surgery. Femoral implants coated with ceramic have been used in patients, however the subsequent clinical performance and time-to-revision of these implants is largely unknown. The scope of this study was to review the current available clinical literature, focusing on retrieval studies of Ceramic-Coated TKAs. Method Literature review of PubMed and MEDLINE. All studies included demonstrated clinical evaluation of implant performance, either in vivo or at revision. Results 9 studies were identified and included for analysis in this study. Retrieval analysis has illustrated microscopic defects in coatings of revised implants, with associated abrasion and 3rd body wear of the polyethylene component. Evidence suggests that coating femoral components with ceramic can prevent effective cement bonding, leading to aseptic loosening and thus earlier implant failure. Despite these problems, high volume centres have been able to demonstrate comparable results when compared with traditional bearing surface combinations. The mechanism behind metal ion hypersensitivity is currently poorly understood; however, the use of ceramic coated knee replacements is demonstrating a reduction in metal ion release. Conclusions Whilst conferring favourable clinical properties in certain instances, the lack of surgical, implant and patient data surrounding the use of this coated implants remains concerning. The literature base remains limited, and meaningful clinical conclusions cannot be drawn. Recommendations include performing robust clinical trials in order to delineate the clinical efficacy of ceramic coatings in knee arthroplasty.

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