A catalyst comprising a promoted mixed metal oxide is useful for the vapor phase oxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated nitrile. In one embodiment, a microelectronic device is engaged with a support member having a first edge, a second edge opposite the first edge, and an engaging surface with at least a portion of the engaging surface spaced apart from the first and second edges. The noise plate includes an aperture through which a boom assembly that houses a microphone may engage to transmit utterances of the wearer to audio processing circuitry. Another aspect is generally directed to performing CGH assays and similar techniques on genomic DNA, in the absence of a Cot-1 fraction, such that the genomic DNA does not substantially cross-hybridize.