Water Flashcards
What are clathrate hydrates
compounds that are imprisonned around by the action of ice-like inclusions not by the action of valence bonds.
what are the different type of water
Type IV
Type III
Type II
Type I
what is the difference between desorption and dehydration
in the two cases there is a decrease in the water acitivity. In the case of desorption, it implies that the product is moving towards an equilibrium with the environment.
what is a hygroscopic?
food that absorbs moisture
what is the Aw that optimize the rxn rates
range from 0.3-0.4
flickering clusters increase in ____ has the temperature increases but decreases in ____
increase in number
decreases in size
what are ice-like inclusions
clathrate hydrates : water structure that forms to disperse the nonpolar molecules in water.
supercooling can occur in ___ water
ultrapure
what is the name of the temperature where all the water is immobilized
eutectic point (between –55˚C and -70˚C)
T or F :enzymatic reactions can still occur in frozen products
true
t or f much of the quality is loss during the thawing
t
