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 question arises whether the opposite extreme, freezing, likewise alters the chemical and organic structure of foods. Letâs pursue this method of food preservation. First, we should note that freezing does not affect foods of little water contentânuts, seeds, dried legumes and dried fruits lose nothing by freezing.In nature, seeds and nuts remain fertile no matter how cold it gets. The more water a food contains, the more it is adversely affected by freezing.When a food is frozen, its water expands. This causes two immediately destructive occurrences: 1  The cell walls burst and the cell contents are spilled due to the internal water expansion; hence the cellâs life is lost.he more water a food contains, the more it is adversely affected by freezing. When a food is frozen, its water expands. This causes two immediately destructive occurrences: 1  The cell walls burst and the cell contents are spilled due to the internal water expansion; hence the cellâs life is lost.