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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.
State about the Latent squint disease Latent squint is seen commonly as exophoria in infancy and presbyopic age and esophoria in childhood. Hypermetropes can have esophoria and
Define Economic Evaluation of Malnutrition? You must be familiar with a proverb frequently used in the field of economics, which says - "resources are limited and wants are unl
Enumerate the Number of converging developments These include: 1) A better definition of the unique developmental concepts that are applicable to infants and young children,
ME T AMORPHOSIS The differentiation results in the formation of larva / infant. The formation of adult from the larva / infant is called as metamorphosis. The metamorph
Which of the below terms is also called "cancer of the blood" - an uncontrolled, greatly accelerated production of white cells. Is it: a) Leukemia b) Polycythemia c) sick
Explain Functions of Ascorbic Acid? Vitamin C is easily oxidized, and the majority of its functions in vivo rely on this property. It plays a key role in the body's synthesis o
Which of the below terms describes study of animal behavior based on comparisons, observation of patterns, and consideration of environmental adaptations? Is it: a) Ethology (p
Tanapox Tanapox infection is endemic to equatorial Africa and is extremely rare outside Africa. Tanapox was initially recognized in humans in 1957 and 1962 in Kenya. It is caused
If a cow develops a preference for eating white four o'clock flowers and ignoring pink and red four o'clock flowers, what type of selection is being demonstrated? Would the cow eve
Determine Reagents for Determination of Protein Content Using Biuret Method? Collect the following reagents to conduct the experiment: 1. 0.2 N NaOH solution - Dissolve 8 g
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