An adherent antimicrobial coating and method of making same comprising hydrogenated amorphous carbon and a dispersion of antimicrobial metal ions adapted to maintain a therapeutically effective zone of inhibition. OPEs result from the structural interaction between the main feature and neighboring features. The polymer powders thus protected against autoignition and oxidative degradation have unexpectedly high thermooxidative stability, even on exposure to high temperatures and oxidizing action. An Internet processor for searching and identifying a plurality of child documents hierarchically linked to a parent document identified by the object and excluding non-hierarchically associated documents in response to user initiation of a hierarchical search. The director maintains a table of resource data that specifies the services andor resources that are provided by andor made available on the server nodes in the distributed computing environment. The oxidation reaction is carried out in aqueous acetic acid, and the catalyst system consists of a combination of cobalt and zirconium organic salts.