One embodiment of an electrical contact has a copper alloy substrate and a hard underlayer plating such as nickel. A rotary tool is inserted into the soil which as it descends into the situs and exits it, mixes the soil, binder and soil along with the air used to inject the binder, reducing the size of binder particles and rendering the resulting mixture sufficiently fluid that much of the air can percolate from it. In one embodiment, the highly substitutional silicon-carbon film is formed to be embedded stressors in the sourcedrain regions of an nFET transistor, and provides tensile stress to a channel region of the nFET transistor for performance enhancement. The hydrogel matrix comprises about 3 to about 150 mM of polar amino acids. Also disclosed are related pharmaceutical preparations and packages. The increase in the number of tiers of the nestable multi-tier structure precludes the increase in height of the transport robot in its retracted position.