A method for improving Fischer-Tropsch synthesis and recycling exhaust gases therefrom. Provided is a display unit that includes a control unit, a storage unit, a display unit, a display processing unit, a sensor unit, a coordinate acquisition unit, a reference position determining unit, and a defined region determining unit. When the judgment means 72a judges that the postures of the retention arms 41a-41e relative to the horizontal plane are abnormal, the control section 7 exercises control to stop the substrate transport means 4. The switching signal is coupled to drive the low-side transistor. Pharmaceutical compositions, infant formulas or dietary supplements containing fatty acids which have been desaturated by a 5-desaturase produced by a recombinant host microorganism or animal also are described. Each of the first and second delay units includes: a logic gate for gating and a logic gate for delaying.