A process of forming a compound film includes formulating a nano-powder material with a controlled overall composition and including particles of one solid solution The nano-powder material is deposited on a substrate to form a layer on the substrate, and the layer is reacted in at least one suitable atmosphere to form the compound film. The present invention also contemplates the use of bifunctional bridge molecules to link two or more entities, wherein the functional groups of the bridge molecules are the novel reactive groups of the present invention. Also provided are nutrient-dense condiments that can be packaged with meat structured protein products or nutrient-dense meat structured protein products. A weight spans the plurality of piezoelectric bodies and attached to the free ends of the plurality of piezoelectric bodies. The signal generated by the circuit varies as a function of the voltage at the output node.