Chapter 6,part A Microbial Growth
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings B.E Pruitt & Jane J. Stein Chapter 6, part A Microbial Growth
Microbial Growth o Microbial growth increase in number of cells, not cell size
Microbial Growth • Microbial growth = increase in number of cells, not cell size
The Requirements for Growth:Physical Requirements 。Temperature Minimum growth temperature Optimum growth temperature Maximum growth temperature
• Temperature • Minimum growth temperature • Optimum growth temperature • Maximum growth temperature The Requirements for Growth: Physical Requirements
Temperature Thermophiles Hyperthermophiles Mesophiles Psychrotrophs Psychrophiles -10 0 10 20 30 4050 60 70 80 90 100 110 Temperature (C) Figure 6.1
Temperature Figure 6.1
Psychrotrophs 。Grow between0°Cand20-30°C 。Cause food spoilage
• Grow between 0°C and 20-30°C • Cause food spoilage Psychrotrophs