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Jun 4, 2024 · The bacterial growth curve represents the number of live cells in a bacterial population over a period of time. There are four distinct phases of the growth curve: lag, exponential (log), stationary, and death. The initial phase is the lag phase where bacteria are metabolically active but not dividing. The exponential or log phase is a time of ...
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Feb 17, 2021 · 4. Death phase. The last phase of the bacterial growth curve is ‘death phase‘ or decline phase. It is marked by a decline in the number of viable bacteria. During this phase, the total count of bacteria may remain constant but the viable count decreases. Undoubtedly, a variety of conditions contribute to bacterial death. The most important ...
Mar 28, 2024 · The bacterial growth curve is a graphical representation of the different phases of bacterial growth over time, including the lag phase, log phase, stationary phase, and death phase. Bacterial Growth Curve
- Stages of the Bacterial Growth Curve. Knowing the difference between the lag, log, stationary, and death phases of a cell growth curve may sound like biology basics but applying that knowledge in active cell culture is a sign of a more fundamental understanding of microbiological processes.
- Lag Phase. This initial cell growth phase is generally characterized by metabolic activity but not growth. The cells utilize media to synthesize the small molecules necessary for replication.
- Log (Exponential Growth) Phase. Once cells enter the exponential growth or log phase, it’s all about the numbers. This is when cells divide by binary fission and the doubling of each generation creates the exponential growth for which the phase is named.
- Stationary Phase. As environmental conditions change and become the limiting factor in growth, cells slow reproduction and enter a stationary phase. In this stage cells are technically still reproducing but it is less than before and roughly equal to the amount of cell death.
A bacterial population follows a characteristic growth curve which has four phases: the lag phase, the log or exponential growth phase, the stationary phase, and the death phase. 1. Lag phase: During this phase, there is no increase in cell number; rather, bacteria are preparing for reproduction and synthesizing DNA and various
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A bacterial growth curve is obtained when a bacterial count of such culture is determined at different time intervals and plotted. A typical bacterial growth curve consists of four phases: lag, log, stationary, and death. This bacterial growth curve reflects the events in the bacterial populations when grown in a closed system of microbial ...
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Aug 31, 2023 · 3. The stationary growth phase. Here the population grows slowly or stops growing (see Figure 17.1.3 17.1. 3) because of decreasing food, increasing waste, and lack of space. The rate of replication is balanced out by the rate of inhibition or death. 4. The decline or death phase.
