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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.
Q. Streptokinase is a substance used in the treatment of acute myocardial infarction. How does this substance act? Substances known as fibrinolytics, like urokinase and strepto
WHAT IS THE FUNCTION OF CELL COAT
(1) It should have high "calorific value" or heat content. (2) It should have "moderate ignition temperature". (lgnition temperature is the minimum temperature at which it s
The enhancer is the cis-acting nucleotide series to which the transcription factor(s) bind, and which increases transcription of the gene. It is not part of the promoter; the gener
Q. Explain Limited mucosal contact diarrhoea? Limited mucosal contact diarrhoea: It results from situations of inadequate mixing of chyme (semi-liquid mass of food passing thro
Define the Food Pricing? The pricing of the food products bought by the consumer is subject to multifarious factors. Each of the factors as discussed below can affect the prici
Describe Prematurity in coronaw artery disease ? CAD in Indians tends to be more aggressive and manifests at a younger age. Generally CAD occurring before the age of 55 years i
EMBRYOLOGICAL EVIDENCES - A comparative study of embryology of different groups of animals reveals certain features that provide evidences for organic evolution. There ar
Q. What are the major negative ions found in living beings? The main anions found in living beings are the chlorine anion (Cl - ), the sulphate anion (SO - ), the nitrate ani
Ask question importance of genetics in human life #Minimum 100 words accepted#
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