Processes for preparing salts of alcohol polybasic acid partial esters are described wherein an alcohol polybasic acid partial ester is reacted with a compound selected from the group consisting of metal oxides, metal hydroxides, metal carbonates and mixtures thereof. In one example, a microfluidic processing device is fabricated on a substrate having a plurality of N independently controllable components, each having at least two terminals. The mixtures and compounds have properties related to the regulation of apoptosis and cytotoxicity of cells and exhibit potent anti-tumor effects against a variety of tumor cells. The fixture is configured for rotating jointly with the spindle. Sensing devices adjacent a card reader slot on the machine enables the controller to detect the presence of a fraud device or unauthorized card reading devices.