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.
The overall quality of food can be impacted by the method and time of freezing. For fruits and vegetables, water makes up over 90 percent of most varieties. When this water freezes, it expands and forms ice crystals that can cause cell walls within the fruits and vegetables to rupture, leaving a much softer product.