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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.
Deep fat frying Deep fat frying, as you may already know, is the method which involves cooking food in hot fat/oil. The fat immediately surrounds the food and cooks it from all
Why and how does the food get spoiled? There are several causes of food spoilage. These include: Growth of Microorganisms, such as bacteria, molds and yeasts, which can
Q. Which are the respiratory muscles in mammals? In mammals the muscles that participate in the breathing process are the diaphragm and the intercostal muscles, in respiratory
What are analogies for a nucleolus? If the nucleolus is the president of a factory then the nucleolus is the manager
External Auditors Reports The audit report is the final stage in the process of an audit. The terms 'true and fair' 'present fairly' have special significance in the audit
MECHANISM OF URINE FORMATION - Production of urine is uripoisis or diuresis. First of all it was explained by Kushney. Nephron separates acidic urine from basic blood, so ma
A haem British English or heme American English is a prosthetic group which having of an iron ion contained in the middle of a huge heterocyclic organic ring called as a porphyrin.
Explain Water soluble vitamins for Infants? Thiamin, riboflavin and niacin requirements are met through breast milk alone and solely breast-fed infants meet their requirements.
Osteomalacia Similar to rickets in young growing animals, osteomalacia is a disease of mature animals caused by absolute or relative deficiency of any one or combination of cal
Explain the Heart Rate Monitoring (HRM) Method? HRM is a method to measure the daily energy expenditure of free-living individuals, based on the relationship of heart rate and
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