Results 301 to 310 of about 6,002,244 (336)

Cytotoxicity of metals, metal-metal and metal-chelator combinations assayed in vitro

Toxicology, 1986
A simple, rapid assay, based on the lysosomal incorporation of neutral red by cells, conveniently carried out in 96-well microtiter plates, was used to evaluate the cytotoxic effect of cationic and anionic metal salts on BALB/c mouse 3T3 fibroblasts.
E, Borenfreund, J A, Puerner
openaire   +2 more sources

Metal-on-metal Bearing Surfaces

Journal of the American Academy of Orthopaedic Surgeons, 2009
Metal-on-metal bearing couples remain a popular option in total hip arthroplasty and are the only currently available option for surface replacement arthroplasty. In general, the intermediate-term clinical performance of metal-on-metal bearings has been favorable.
Joshua J, Jacobs, Robert M, Urban, Nadim J, Hallab, Anastasia K, Skipor, Alfons, Fischer, Markus A, Wimmer   +5 more
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Metal–Insulator–Metal Transistors

Advanced Materials, 2008
A metal–insulator–metal field‐effect transistor has been fabricated. The device performance was achieved by reducing the density of states by only partially covering the substrate, which increases the relative field effect. An infinite on–off ratio, no lower limit to device dimensions, a generally enhanced flexibility in design, and low production ...
Xiang, HF, Xu, ZX, Stallinga, P, Roy, VAL, Che, CM   +4 more
openaire   +3 more sources

Metal on Metal: Is It Worth the Risk?

The Journal of Arthroplasty, 2010
There has been an explosion in the use of metal-on-metal bearings in the last 5 years throughout the world. This has mostly been driven by the use of metal bearings in resurfacing, although metal heads have also been used in conjunction with primary total hip arthroplasties.
Crawford, Ross, Ranawat, Chitranjan, Rothman, Richard   +2 more
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The shortest metal‐metal bond

The Chemical Record, 2010
AbstractThe synthesis and isolation of stable bimetallic complexes that contain formally quintuply bonded transition metals is a novel and emerging field of science. Efforts have been undertaken in designing and tuning the ligands to achieve a very short (actually the shortest) metal‐metal bond.
Awal, Noor, Rhett, Kempe
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Commentary: Metal on metal hips

BMJ, 2011
Total hip replacement is one of the most successful operations of the 20th century and is currently performed in 70 000 patients a year in the UK,1 250 000 a year in the United States, and one million worldwide. In an attempt to improve wear resistance and to allow bone conservation through hip resurfacing, metal on metal bearings were re-introduced in
John, Skinner, Peter, Kay
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Background of metal-on-metal resurfacing

Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 2006
Hip resurfacing is not a new concept and attempts to treat hip arthritis without resecting the femoral head and neck have been made since the 1950s. The resurgence of new and better-engineered metal-on-metal bearings has provided the means to develop a viable prosthetic solution from a concept that was once abandoned.
H C, Amstutz, M J, Le Duff
openaire   +2 more sources

Metal-To-Metal and Metal Gasketed Seals

SAE Technical Paper Series, 1965
<div class="htmlview paragraph">The parameters governing the leakage rate across metal-to-metal and metal gasketed seals are discussed qualitatively and quantitatively based on experimental evidence. The sensitivity of the sealing phenomenon to the surface finish of the mating components is illustrated. The results of several experiments in which
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Metal–Metal Exchange Coupling

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
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Metal allergy and second‐generation metal‐on‐metal arthroplasties

Contact Dermatitis, 2011
There are concerns about the induction of metal allergy with second‐generation metal‐on‐metal prostheses, and the role that this may play in the development of complications such as ‘pseudotumours’ or failure of the implant. In this review, we attempt to set out the current knowledge on this subject. From a review of the literature, it is apparent that
Philippa J, Cousen, David J, Gawkrodger
openaire   +2 more sources