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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.
Procedure of Examining Foot Let us learn the steps of examining the foot and identify foot at risk. Steps to follow: 1. Make the patient comfortable. 2. Provide priv
Define Proteins in the immune system? Proteins such as γ-globulin serve to protect the body against foreign cells. The immunoglobulin produced by lymphocytes is the large polyp
Explain about functions of the lacrimal apparatus. Tear Secretion Aqueous tears are secreted by the main (reflex secretion) and accessory (basic secretion) lacrimal
What is the Rh typing of the mother and of the fetus in the hemolytic disease of the newborn? In the hemolytic disease of the newborn the mother is Rh- and the fetus Rh+. In th
Which technique would you use to A) see if a particular protein bound to a piece of DNA B) Detect exactly where on a piece of DNA a protein bound.
Describe about Psycho-social Change in children? Adolescence is a period of maturation for both mind and body. Along with the physic4 growth, emotional and intellectual develop
How has the position of the stomata changed in some plants to prevent excessive water loss by transpiration? In some plants that have leaves that be given too much sunlight the
Q. What are the near point and the far point of the vision? The near point is the closest distance between the eye and an object that makes possible the formed image to be focu
Competition - Processes in Succession The aggregation of individuals in an area leads to inter specific and intra specific competition. The competition is usually for
Domestication - Wildlife It means that man has taken under his direct care the living beings which are useful to him. Through extensive breeding programmes, he has modified th
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