What is the standard value of water activity in food?
Answers were Sorted based on User's Feedback
Answer / sulfath
The water activity scale extends from 0 (bone dry) to 1.0 (pure water) but most foods have a water activity level in the range of 0.2 for very dry foods to 0.99 for moist fresh foods. Water activity is in practice usually measured as equilibrium relative humidity (ERH).
The water activity (aw) represents the ratio of the water vapor pressure of the food to the water vapor pressure of pure water under the same conditions and it is expressed as a fraction. If we multiply this ratio by 100, we obtain the equilibrium relative humidity (ERH) that the foodstuff would produce if enclosed with air in a sealed container at constant temperature. Thus a food with a water activity (aw) of 0.7 would produce an ERH of 70%.
Fresh meat and fish
.99(a/w)
Bread
.95
Aged Cheddar
.85
Jams and jellies
.8
Plum pudding
.8
Dried Fruit
.6
Biscuits
.3
Milk powder
.2
Instant coffee
.2
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / opik
it depends on the food that you eat and the content of food.
If there are more thing's that are dissolved in the water,
the water will lose more of it's activity.
If you just want to pure water. Them an activity of 1 to
0.99 is good. But if the water has many contents in it:
syrups, milk, coke, soup, etc, then of course the water
activity will decrease
Is This Answer Correct ? | 0 Yes | 1 No |
Answer / sathyabama
The term water activity (aw) refers to this unbound water.
Is This Answer Correct ? | 0 Yes | 1 No |
What is the self antigen for haemolytic anemia?
State some of the drawbacks of perfusion.
What is the treatment of hiv?
describe various plants nutrients under the following heading 1:phosphorus excessive supply/toxity 2:sulphur excessive supply/toxity 3:magnesium excessive supply/toxity 4:manganese excessive supply/toxity 5:iron excessive supply/toxity
What is alzheimer’s disease?
What is therapeutic cloning?
What would you say when HR asks you "Please do help me understand why are you looking for a non-technical profile?"
What is the ideal Bacteria Value for Sewage treatment plant operations with great efficiency.And what is the COD , BOD and Bacteria Measuring units and standard values in India.
1 Answers CBRE, Cushman Wakefield, EFS, JLL,
What are the drawbacks of prosthetic limb?
What is the principle behind dna fingerprinting?
Explain microarrays. How are they related to dna?
What is lmo? State some of its importance.