A tool for releasing excess air from the swim bladder of a fish. In addition, a process for the testing of DNA from cells obtained from lactating bovines for the presence of DNA encoding certain -casein proteins, selecting the bovines on the basis of the testing, and then milking those bovines to produce milk free of -casein A1 for use in the prevention or treatment of coronary heart disease is disclosed. The titanium oxide 11 produced by the whisker reaction was bound to the surface of aluminum borate whisker 3, and the preform having high strength was obtained accordingly. A circuit model for the target wire may then be generated using the inductance and capacitance values.