Growth curve in batch culture Flashcards
batch culture
an organism growing in an enclosed vessel, such as a tube or a flask
The growth curve describes the entire growth cycle and is made up of four phases:
lag, exponential, stationary, and death
lag phase
time needed by the bacteria to adjust to the new condition, slow
growth.
exponential phase
When a growing cell population doubles at regular intervals
When growth is stopped?
stationary phase,no net increase in cell number
if il y en a qui divise , pk grow 0 ?
some cells in the population grow while others die,
tout c termes appliquent uniquement sur?
population des cellules
Death?
cells start to die, metabolism has stopped, in some cases cell death
occurs with cell lysis
When is the count viable?
at the beginning of the stationary phase
when can we use turbidity ?
towards the end of stationary phase
the stationary phase is due ?
limiting nutrients are depleted or accumulation of a waste
product that inhibits growth
death phase is also a ?
exponential function
in the stationary phase the cells are still?
metabolically alive, induction of ‘‘survival systems’’
Batch cultures are continually being affected by?
the metabolic activities of the
growing microorganism
the metabolic activities of the
growing microorganism?
depletion of nutrients, generation of toxic waste.
