MMG 301 Lecture Notes - Lecture 15: Limiting Factor, Growth Factor, Chemostat

• School: MSU
• Department: Microbio & Molecular Genetics
• Course: MMG 301
• Professor: Scott Mulrooney

Document Summary

Lecture 15: recall the equation governing bacterial growth. N = n0 x 2n (n = # of generations: explain why the progression of bacterial growth looks linear on a semi-log plot. Bacteria grows at a constant rate logarithmically: calculate the generation time or the number of generations per hour of a culture based on a given plot. Find where bacterial growth doubles and compare the times at each growth stage: describe what happens in the four growth phases of batch cultures. Exponential: cell and mass double in each generation; very uniform population. Stationary: balance between cell division and death; still metabolically active, still produce waste. Death: cells start dying; decreases exponentially: explain what parameters determine the presence and duration of the lag phase. Complex medium (short lag phase) or minimum medium (long lag phase: explain what parameters control the growth rate in exponential phase. Faster growth in complex medium than minimum medium: explain parameters that can cause the stationary phase.