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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.
Cognitive - Behavioural Approaches They includepsychoeducatiorzal and rational-emotive therapy. The goal is to identify problem behaviour and irrational beliefs and then to de
Describe about the Argyll Robertson Pupil (ARP) Argyll Robertson Pupil (ARP) occurs in patients who have tertiary syphilis. There is a "light-near dissociation" because pupils
what are the names of karyotypes?
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Explain the presence of haustoria in nuclear and helobial endosperm
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Define methods used in combination with pasteurization? Typical other methods used in combination with pasteurization include: 1. Refrigeration as in the case of milk
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