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What is Quantitative Techniques?
Microbial quality of substances like food, milk, air, water, soil etc. can be assessed both qualitatively and quantitatively. Quantitative enumeration of microorganisms in a given sample can be accomplished in a laboratory by employing various methods, either by direct or indirect counts, each having its own advantages and disadvantages. No single method is always best. The most appropriate approach will depend on the experimental situation. These methods can also be used to measure microbial growth, determining growth rate and generation time. These methods devised for microbial quantitation either measure the cell numbers or determine the cell mass or cell constituents like DNA, protein, O2 uptake, carbon dioxide production, turbidometric measurement for increase in cell number, membrane filter count and the serial dilution agar plate method etc. Microbial populations are very large, therefore, most of the methods of counting are based on direct or indirect counting of a very small sample, achieved indirectly by a series of dilutions. Calculations then determine the size of total population.
Differentiation - Morphogenesis and Tissue Organisation It should be clear to you that a single cell, the fertilized egg, gives rise to various structures that we mentioned. S
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difference between axon and cyton
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Which are the plant tissues responsible for the supporting of the plant? The plant supporting tissues are the collenchyma and the sclerenchyma. The collenchyma is made of li
WHY BLOOD IS CALLED FLUID CONNECTIVE TISSUE
Plants - Rapidly Flowing Waters Among the plants only small, well attached forms, such as sessile algae can survive here. Thus, due to the presence of only a few plants, the n
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