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General effects of beryllium sulfate on isolated rat heart muscle mitochondrial fraction.

The effects caused by Be2+ on the properties of isolated rat heart muscle mitochondria were investigated. It has been shown that Be2+ enhances oxygen uptake by the mitochondrial fraction in the presence of oxidizable substrates. This is due to the uncoupling effect caused by Be2+ on the mitochondria, which also undergoes a swelling effect by this divalent ion that can be accounted by the retention of Be2+ by the mitochondria. The saturation of the organellae binding sites occurs when the concentration of the ion reaches a maximum of 6.2 mumoles/mg protein.

Adenosine Triphosphatases↗

Shear bond strengths of prosthodontic adhesive systems to a nickel-chromium-beryllium alloy.

Panavia, a composite resin luting agent containing phosphate monomers, bonds chemically to air-abraded base metal alloys and is particularly suited for cementing resin-bonded retainers. Another adhesive methodology (Silicoater system) incorporates a pyrolytically applied silica layer to metal substrates to promote bonding of a resin adhesive. The object of this study was to compare prosthodontic adhesive systems that incorporated the Silicoater system and/or Panavia. The results showed that the surface treatment that provided significantly higher shear bond strengths was the Silicoater system and a layer of unfilled resin. A second test evaluated use of Panavia as a metal opaquing material beneath laboratory light-curing resins. Results showed that Panavia Opaque material was displaced peripherally during placement of overlying laboratory composite resin veneers. This resulted in an uneven intermediate layer of Panavia.

Adhesives↗

Chronic beryllium disease prevention program; worker safety and health program. Final rule.

The Department of Energy (DOE) is today publishing a final rule to implement the statutory mandate of section 3173 of the Bob Stump National Defense Authorization Act (NDAA) for Fiscal Year 2003 to establish worker safety and health regulations to govern contractor activities at DOE sites. This program codifies and enhances the worker protection program in operation when the NDAA was enacted.

Berylliosis↗