MICR-3050 Chapter Notes - Chapter 5.1-5.3, 5.6-5.14: Sodium Chloride, Microaerophile, Peroxidase
14 Oct 2018
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Document Summary
Often refers to an increase in the number of cells. Microbiologists usually study population growth rather than growth of individual cells. 1 cell 2 cells = 1 generation: the mathematics of cell growth. Time required for the population to double in number of cells. Observed when microorganisms ae cultivated in batch culture. Culture incubated in a closed vessel with a single batch of medium. Usually plotted as logarithm of cell number versus time. Has 4 distinct phases: lag, log, stationary, and death: lag phase. Cell synthesizing new components to replenish spent materials to adapt to new conditions. Varies in length in some cases it can be very short or absent: exponential phase. Population is most uniform in terms of chemical and physical properties. Cells in this phase are considered the heathiest: stationary phase. Total number of viable cells remains constant. Metabolically active cells stop reproducing or reproductive rate is balanced by death.
