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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.
Which of the following represents two things that are identical? a.Two alleles for the same gene in a homologous chromosome pair. b.The sequences of DNA in the two sister chr
Explain the Procedure of Taking Blood Pressure - Explain the procedure to the patient. In case patient is coming for first time to check the blood pressure explain to the patie
Explain the Systemic Metabolic Responses? Many of the metabolic responses to infection are similar to those following injury. The key changes include: Hyper metabolism: Oxyg
Explain in detail about Male Reproductive System The male reproductive organ consists of the following: A pair of testes, held in scortum; produces spermatooa and testoster
What is cloning? Cloning is the making of an organism genetically the same to another by means of genetic engineering. The basis of cloning is the nucleus transplantation ma
What is nucleus where it is found? Nucleus : The nucleus is present only in eukaryotic cells. It is the control center and is generally found in the center of the cell. The
Trypsin Trypsin is secreted in the inactive form trypsinor - which is converted into the active form trypsin by the enzyme enterokinase secrated by the duodenal mucosa.
what are the advanced characters of phylum annelida that cannot be found in other phyla?
Limiting Factor - Ecosystem In all ecosystems one factor, usually abiotic, limits the growth of organisms and is therefore called a limiting factor. The limiting factor is one
a) The elongation level of translation in eukaryotes requires three elongation factors, eEF-IB, eEF-1A and eEF-2, that have similar functions to their prokaryotic counterparts EF-G
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