Metal ion-aromatic complexes. XIX. Short metal-metal distances in bis (silver trifluoroacetate)benzene

1974 ◽  
Vol 10 (10) ◽  
pp. 909-913 ◽  
Author(s):  
G.W. Hunt ◽  
T.C. Lee ◽  
E.L. Amma
Keyword(s):  
Metal Ion ◽  
Silver Trifluoroacetate ◽  
Metal Metal ◽  
Aromatic Complexes

Metal ion-aromatic complexes. VII. Crystal and molecular structure of bis(m-xylene)silver perchlorate

1969 ◽  
Vol 91 (21) ◽  
pp. 5745-5749 ◽  
Author(s):  
I. F. Taylor ◽  
E. A. Hall ◽  
E. L. Amma
Keyword(s):  
Molecular Structure ◽  
Metal Ion ◽  
Crystal And Molecular Structure ◽  
Silver Perchlorate ◽  
Aromatic Complexes

Metal Ion Release after Hip and Knee Arthroplasty – Causes, Biological Effects and Diagnostics

2019 ◽  
Vol 158 (04) ◽  
pp. 369-382 ◽  
Author(s):  
Jörg Lützner ◽  
Klaus-Peter Günther ◽  
Anne Postler ◽  
Michael Morlock
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Biological Effects ◽  
Ion Concentration ◽  
Blood Levels ◽  
Ceramic Head ◽  
Ion Release ◽  
Imaging Results ◽  
Metal Ion Release ◽  
Metal Metal

AbstractAll metal implants in human bodies corrode which results in metal ions release. This is not necessarily a problem and represents for most patients no hazard. However, if a critical metal ion concentration is exceeded, local or rarely systemic problems can occur. This article summarizes the mechanisms of metal ion release and its clinical consequences. Several situations can result in increased metal ion release: metal-on-metal hip arthroplasties with increased wear, increased micromotion at taper interfaces, direct metal-metal contact (polyethylene wear, impingement), erroneously used metal heads after ceramic head fracture. Possible problems are in most cases located close to the concerned joint. Furthermore, there are reports about toxic damage to several organs. Most of these reports refer to erroneously used metal heads in revisions after a broken ceramic head. There is currently no evidence of carcinogenic or teratogenic effects of implants but data is not sufficient to exclude possible effects. Cobalt and chromium blood levels (favorably in whole blood) should be measured in patients with suspected elevated metal ions. According to current knowledge levels below 2 µg/l seem to be uncritical, levels between 2 and 7 µg/l are considered borderline with unknown biological consequences and levels above 7 µg/l indicate a local problem which should be further diagnosed. Metal ion levels always need to be interpreted together with clinical symptoms and imaging results.

Universal aqueous synthesis of ultra-small polymer-templated nanoparticles: synthesis optimization methodology for counterion-collapsed poly(acrylic acid)

2018 ◽  
Vol 96 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Nari Kim ◽  
Calvin C.H. Cheng ◽  
M. Cynthia Goh
Keyword(s):  
Acrylic Acid ◽  
Metal Ion ◽  
Rapid Development ◽  
Ion Concentration ◽  
Universal Method ◽  
Aqueous Synthesis ◽  
System A ◽  
Metal Metal ◽  
Optimization Methodology ◽  
Poly Acrylic Acid

A long polyelectrolyte chain collapses into a nano-sized particle upon the addition of counterions under appropriate solution conditions. This phenomenon forms the basis for a simple universal method for aqueous synthesis of ultra-small (<10 nm) metal, metal oxide, and other types of nanoparticles in the following manner: the counterion-collapsed polyelectrolyte chains are made stable by crosslinking, effectively trapping the counterions, which are subsequently chemically modified, to form metal nanoparticles via reduction or metal oxides nanoparticles via oxidation, within the collapsed polymer nanoparticle. This highly versatile platform methodology can be applied to almost any polyelectrolyte–counterion pair, making possible the rapid development of syntheses of different nanoparticles within the same chemical environment. Using poly(acrylic acid) as a model system, a methodology for the optimization of conditions for the polyelectrolyte collapse by various mono- and multi-valent metal cations is developed. The optimal counterion concentration did not correlate with ionic strength and metal ion valency and was highly variable from system to system. By monitoring the polyelectrolyte conformation using viscosity and turbidity measurements, the appropriate metal ion concentration for each nanoparticle system was determined.

The applicability of the complex impedance plane analysis method to metal-metal ion electrodes

1973 ◽  
Vol 44 (3) ◽  
pp. 323-325 ◽  
Author(s):  
M. Sluyters-Rehbach ◽  
J.H. Sluyters
Keyword(s):  
Metal Ion ◽  
Complex Impedance ◽  
Analysis Method ◽  
Plane Analysis ◽  
Impedance Plane ◽  
Metal Metal

Metal ion-aromatic complexes. XV. Synthesis, structure, and bonding of bis(tetrachloroaluminato)-.pi.-benzene lead(II)-benzene

1974 ◽  
Vol 13 (10) ◽  
pp. 2429-2434 ◽  
Author(s):  
A. G. Gash ◽  
P. F. Rodesiler ◽  
E. L. Amma
Keyword(s):  
Metal Ion ◽  
Aromatic Complexes ◽  
Structure And Bonding

Metal ion-induced self-assembly of functionalized 2,6-oligopyridines. 4. Metal-metal interaction in double-stranded, dicuprous helicates derived from terpyridine derivatives

1993 ◽  
Vol 32 (20) ◽  
pp. 4450-4456 ◽  
Author(s):  
Kevin T. Potts ◽  
Majid Keshavarz-K ◽  
Fook S. Tham ◽  
Hector D. Abruna ◽  
Claudia Arana
Keyword(s):  
Self Assembly ◽  
Metal Ion ◽  
Metal Interaction ◽  
Metal Metal
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