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.
Drying can be used to control the growth of microorganisms because when water is removed from cells, they shrivel and die. To dry foods, they are mixed with salt or sugar. Either draws water out of microbial cells by osmosis, and they quickly die.