Ionic liquid epoxide monomers that react with cross-linking agents to form polymers exhibiting high tensile and adhesive strengths are described. In a preferred embodiment, the product comprises a nontoxic paint powder and a sheet of materials with two components: component 1 is a sheet of material capable of acting as a release liner for component 2; component 2 is a sheet of material capable of adhering to the surface of fruits and vegetables. According to the method of the present invention, biodegradable polymer stereocomplexes in the form of powder or porous foam having excellent thermal and mechanical stabilities can be prepared in a simple, economical and environmentally-friendly manner in a single process. After attracting the attention of the subjects by playing back a recorded audio sound, an image may be automatically captured. Exposed portions of the cured polyimide precursor material are removed for exposing portions of the pole tip layer. In one aspect, the computer apparatus and method may generate a new partition within a hierarchical data structure of interlinked nodes, if a distribution of key values stored in the hierarchical data structure is skewed in favor of a range of key values.