Bacterial Physiologya - doubling time is a constant The...

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Bacterial Physiology Bacterial Physiology
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What Bacteria Need to Grow What Bacteria Need to Grow Proper Nutrients Vitamins & Minerals Water Light or Darkness Correct acid base balance (pH) Proper Atmosphere (gases) Proper Temperature Removal of Wastes and Inhibitors
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Bacterial Growth Bacterial Growth If the 8 previous parameters are met,the best possible growth can be achieved
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Bacterial Growth Bacterial Growth Each species of bacteria has optimum conditions for best growth. If a minimum of criteria are met the bacteria can just make it. There is a minimum, optimum and maximum growth requirement for each bacterial species.
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Bacterial Growth Is.. Bacterial Growth Is.. Increase in individual size Increase in population size A bacterial generation occurs every time a population doubles in size Under optimum conditions , a population can double in as little as 15 minutes depending on the species
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Bacterial Growth Curve Bacterial Growth Curve Under optimal conditions the population
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Unformatted text preview: doubling time is a constant The growth rate is exponential and depends on the growth factors The final number in a population is equal to the initial number x 2 raised to the power that is the number of generations that have occurred Bacterial Growth Bacterial Growth If you start with 50 cells how many will you have at the end of 9 generations? 50----100---200--- 400---800---1600---3200---6400---12800---25600 25,600 Media For Bacterial Growth Media For Bacterial Growth Nitrogen source Carbon, hydrogen Vitamins as cofactors or carrier molecules Minerals salts , electrolytes , ions Water cells are 80% or more water Liquid media , solid media , plates or tubes Types of Culture Media Types of Culture Media General purpose Selective Differential Transport Chemically defined or synthetic assay Enrichment Enriched Mold plating...
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