A fuel cell includes an anode and a cathode, and a fuel gas supplied to the anode and an oxidant gas supplied to the cathode chemically react with each other to generate electricity. The spiral rod extender is attached to the end of the spiral rod by the window or balance manufacturer. The combined signal vector is then decoded using a maximum-likelihood decoder. The compositions of this invention may be utilized alone or in combination with known exogenous fibrolytic enzyme supplement to improve fiber digestion in mammals and birds. The metal catalysts can be used for the hydrogenation, dehydrogenation, isomerization reductive alkylation, reductive amination, andor hydration reaction of organic compounds.