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One of man's oldest methods of preserving foods is drying or desiccation. The preservation of foods by drying is a direct result of removal of moisture. Microorganisms need water for growth. The exact amount of water needed for growth of microorganisms varies. This water requirement of microorganisms is best expressed in terms of available water or water activity aw, the vapour pressure of the solution (of solutes in water in most foods) divided by the vapour pressure of the solvent (usually water). Thus aw, for pure water would be 1.00. The water activity depends on the number of molecules and ions present in solution, rather than their size. Thus a compound like sodium chloride, which dissociates into two ions in solution, is more effective at reducing the water activity than a compound like sucrose on mole-to-mole basis.
How plants control the opening and the closing of the stomata? The closing and the opening of the stomata depend upon the necessity of the plant to lose water and heat through
Define Male and Female Ascaris Lumbricoides? Ascaris lumbricoides unlike most free-living nematodes and a large number of parasites of plants and animals are not tiny or micro
How does caffeine effect plant growth? Minerals like potassium are often found alongside caffeine when it happens in plant sources like coffee beans, and that could help the pl
Explain benefits of Protein Protein: Once the energy requirements have been estimated, protein requirements can be addressed. The aim is to achieve nitrogen balance. There are
Explain Mid-diastolic and Lafe Diastolic (Pre Systolic) Sounds ? Mid-diastolic sounds are S3 sounds and late diastolic (pre systolic) sounds are S3 sounds. Pre systolic Pacema
Explain Management of Ledge - Non-Surgical Endodontic Retreatment Place a bend of approximately 45 degree in the apical 1-2 mm of a #15 to 25 file. By gentle reciproca
Define Determinants of Food Security - Public Nutrition? We learnt above that there is also a qualitative aspect to food security, which compels the perception of food not only
Coarse fish reach or lowland course zone This zone corresponds to the lower course of the river. Here the river is deep and slow moving. Its sluggish flow results in the depos
what is sperm
Q. Why is the digestive system of these animals called incomplete? Incomplete digestive system is in that which the digestive cavity has only one opening.
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