See Also: Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Dehydration(medicine)
dehydration(encyclopedia)
Dehydration(health)
dehydration fever(medicine)
relative dehydration(medicine)
absolute dehydration(medicine)
voluntary dehydration(medicine)
Dehydration - Horse Racing(gambling)
dehydration-condensation reaction(medicine)

patch test (medicine) and dehydration (sh)


patch test (medicine)


patch test


A test of skin sensitiveness: a small piece of paper, tape, or a cup, wet with CO non-irritating diluted test fluid, is applied to skin of the upper back or upper outer arm and after 48 hours the area previously covered is compared with the uncovered surface; an erythematous reaction with vesicles occurs if the substance causes contact allergy.

See: photo-patch test.


dehydration (sh)




Method of Food preservation in which moisture (primarily water) is removed.

Dehydration inhibits the growth of microorganisms and often reduces the bulk of Food. It is an ancient practice, used by prehistoric peoples in sun-drying seeds, by North American Indians in sun-drying meat strips, and by the Japanese in drying fish and rice. It was used to prepare troop rations in World War II, and in recent decades campers and relief agencies have discovered its advantages. Commercial dehydration equipment includes tunnel dryers, kilns, and vacuum dryers. A combination of dehydration and freezing is used in the process of freeze-drying, whereby solid Food remains frozen while its liquid escapes as vapour. The dairy industry is one of the largest producers of dehydrated foods, including whole milk, skim milk, and eggs.