Arc Flash Boundary (ARC) - is the distance at which an electrical arc can flash. outward, which may endanger employees working on electrical equipment. Flash Protection Boundary (FPB) - theJcalculated safe working distance from. electrical equipment which would not expose the employee to the hazards.
One advantage of freeze drying is that food preserved in this method can last longer than food preserved in virtually any other way. Freeze dried foods, if stored properly, can last for years, even decades, and taste exactly as they did the day they were bought fresh.
Popular methods of preserving food include freezing, canning, dehydrating and salting. These preservation methods inhibit the growth of bacteria by either eliminating moisture from foods or removing the oxygen that harmful bacteria needs to survive and thrive, according to About.com's Bethany Moncel.