A floating-disk type brake system that includes floating disk assemblies placed respectively in spaces between a rotating member, such as a wheel of a transportation machine or a rotating shaft of a machine tool, and a stationary member to reduce differences in the rotating speed of adjacent sliding surfaces of the floating disk assemblies in frictional sliding engagement. The new elements function under conditions such that electrical conductivity is dominated by Poole-Frenkel transport. The invention further relates to a method for producing food products from one or more of the fractions obtained. The counter electrode is dc coupled to the metal product, or to a conductive component in direct contact with the metal product, such that electric current flows from the metal to the counter electrode due to the difference in the natural potentials of the metal and the counter electrode. All things being equal, this double-population regenerated catalyst enables the maximization of the LCO yield. Also provided are pharmaceutical compositions comprising those compounds and methods of using the compounds and pharmaceutical compositions to treat conditions ameliorated by inhibition of matriptase or MTSP1.