Chapter 5: Microbial Growth and Control Flashcards
Type of growth where every cell is theoretically identically growing
Balanced growth
Phases of cell growth
Lag
Exponential
Stationary
Death
Term for optical density
Turbidity
Division apparatus
Divisome
Major components of divisome
Fts proteins, like FtsZ
Direct methods of growth measurement
- Viable/Plate counts
- Microscope counts
- Flow cytometry (with Fluorescence-Activated Cell-Counters)
Indirect methods of growth measurement
- Spectrophotometry
- Cell constituents
grow optimally in high temperatures
thermophiles
grow optimally in low temperatures
psychrophiles
capable of growing at low temperatures but grow better at higher ones
pychrotolerant
grow optimally in acidic conditions
acidophiles
grow optimally in basic conditions
alkaliphiles
grow optimally in mid-range temperatures
mesophiles
grow optimally in pH neutral environments
neurtophiles
require NaCl for growth
halophiles
usually marine organisms
organisms that require oxygen for growth
obligate aerobes
organisms that have no requirement for oxygen but grow more optimally with it
facultative aerobes
organisms that require oxygen at lower levels than atmospheric levels
microaerophilic aerobes
organisms to whom oxygen is toxic
obligate anaerobes
organisms that grow independently of oxygen
aerotolerant anaerobes
chemical used to test for oxic and anoxic conditions
reducing agent
like thioglycolate
sterilization that maintains cell populations
bacteriostatic
sterilization that kills bacterial cells
bacteriocidal
sterilization that kills and destroys bacterial cells
bacteriolytic
