Predrying treatment

In general it is difficult to compare the losses in vitamins during dehydration because retention of vitamins depends on the nature of foods, predrying treatments given (sulfur-ing, blanching methods), and the conditions of drying (techniques, time, and temperature). 

The effect of additives on the rehydration qualities of dehydrated vegetables was studied by Neumann [83] and Jayaraman et al. [81]. A combined predrying treatment of sodium carbonate and sucrose (60%) produced the best rehydrated celery, with a rehydration percentage of 71% and the dices were well filled out with texture remaining tender to firm [83]. Similarly, a presoaking treatment in a combined... 

H.J. Neumann, Dehydrated celery effects of predrying treatments and rehydration procedures on reconstitution, J. Food Sci., 37 437 (1972). 

Some radioactive metals (e.g., cesium) are highly volatile under Q-CEP operating conditions. Predrying may be required for liquids with high water contents. Solids may require shredding or milling prior to treatment. Extensive treatment of off-gases is required. 

The electrode or flux to be tested shall be given such treatment before sampling as has been agreed upon or specified by the manufacturer, e.g. predrying under specified conditions, or storing under specified conditions. 

Predrying n The drying of a resin or molding compound prior to its introduction into an extruder, a mold, or molding machine. Many resins and plastics compounds are hygroscopic and require this treatment, to prevent... 

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