A potency of ELF magnetic field utilization to the process of milkfish preservation (chanos chanos)

This research aims to prove that Extremely Low Frequency (ELF) magnetic field radiation can be used in the process of milkfish preservation. The sampling consists of three groups, the first group is exposed by ELF magnetic field of 750 μT, the second group is exposed by ELF magnetic field of 900 μT, and these groups are exposed in 2x 30 minutes and 2x 45 minutes. The third group is the control, which does not need to be exposed by the ELF magnetic field. The research finding shows that the ELF magnetic field radiation exposure of 730-μT intensity during 2x30 minutes in the fresh milkfish has been proven to reduce bacterial growth up to 73% and the exposure of 880μT ELF magnetic field radiation can reduce the bacterial growth up to 62% in the fifth hour after the exposure than the control. Meanwhile, the ELF magnetic field exposure by the intensity of 730μT or 880μT during 2 x 45 minutes significantly shows the stability of bacteria number than the control. Therefore, the ELF magnetic field radiation in more than 700μT intensity in 2 x 30 minutes has the potential to be applied in the process of milkfish preservation.