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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.
Compare and contrast the effect of a deletion in the operator of the lactose operon with one in the operator of the histidine operon.
Where in the plants is a large amount of IAA found? The Auxins are produced and found in large amount in the apical buds of the shoots and stem and in the young leaves.
Hello, I''m doing an assignment on characteristics and types of fungal enzymes and have also been requested to describe their assay.My libra
Explain the Techniques of Numerical Taxonomy Many other techniques of numerical taxonomy are available now, some with special objectives. Classification based on the methods
Late recurrence of artgirza: This is a reflection of progress of disease in the native coronary arteries distal to the grafts or narrowing or blockage of one or more of the g
Q. DNA damaged by alkylating agents? 1. Some simple alkylating agents 2. Illustrations of products of alkylating agents 3.Many of these products can be repaired by excision rep
Why Water and Electrolytes are important for exercise? Water and electrolytes are important for exercise performance as they maintain blood volume and osmolality, thermoregulat
Illustrate the Applications of vitamin B 6 The heating processes employed in the industry for the sterilization of milk based formulations will greatly reduce their vitamin B
how these can be called as acellular?
Q. Dietary management of dyspepsia? Keeping in mind the etiology, symptoms and complications of dyspepsia it must be clear that treatment and management of [his disorder does n
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