Advantages And Disadvantages

Advantages of freeze drying include (1) low thermal damage; (2) good retention of volatile flavors (2); (3) good vitamin retention with minor exceptions (eg, loss of pantothenic acid in pork) (3); (4) rapid product rehydration (sometimes this requires slow freezing before drying); (5) low product shrinkage; (6) long product storage life if products are suitably packed; and (7) retention of biological activity (particularly if cryoprotectants are used during freezing). Disadvantages of freeze drying include (1) freeze drying costs much more than conventional drying (4);

(2) certain products are damaged by freezing before drying;

(3) freeze-dried products rapidly pick up moisture unless packed and maintained at low humidity; (4) freeze-dried products are very friable; and (5) some freeze-dried products (eg, carrots) bleach when stored (this can be prevented by suitable pretreatment).

Sleeping Sanctuary

Sleeping Sanctuary

Salvation For The Sleep Deprived The Ultimate Guide To Sleeping, Napping, Resting And  Restoring Your Energy. Of the many things that we do just instinctively and do not give much  of a thought to, sleep is probably the most prominent one. Most of us sleep only because we have to. We sleep because we cannot stay awake all 24 hours in the day.

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