A coin operated air compressor providing compressed air with a share splitter for diverting the proceeds from deposited coins into separate collection bins according to predetermined ratio(s).

According to the present teachings, systems, compositions, kits and methods for protein melt analysis are provided that utilizing a dye that is a dipyrrometheneboron difluoride compound. In some embodiments, a method comprises preparing a sample by mixing at least one protein with a dye, and applying a controlled heating, while recording the fluorescence emission of the sample.

An electro-mechanical device is disclosed. The electro-mechanical device has an electrical switch and a mechanical meter operably connected to the electrical switch. The mechanical meter includes at least one aperture. The mechanical meter includes at least one movable member having at least one of a plurality of barcodes or a plurality of characters. The at least one of the plurality of barcodes or the plurality of characters is selectively visible through the at least one aperture.

An electro-mechanical device is disclosed. The electro-mechanical device has an electrical switch and a mechanical meter operably connected to the electrical switch. The mechanical meter includes at least one aperture. The mechanical meter includes at least one movable member having at least one of a plurality of barcodes or a plurality of characters. The at least one of the plurality of barcodes or the plurality of characters is selectively visible through the at least one aperture.