THEO Flashcards
Main laboratory ware used in dilution plate counts
Petri dish
microorganisms produced per unit substrate utilized
growth yield
measures particle size distribution of cells in a culture
particle counters
typically used as seed in batch cultures
inoculum
affect the transport of certain nutrients in and out of the cell
Ionic strength
dissolved gas toxic to some organisms at high concentration
dissolved carbon dioxide
catabolism of cellular reserves for continued maintenance and energy
endogenous respiration
cells produce secondary metabolites
stationary phase
adaptation to new environment
lag phase
cell physiology changes to favor survival over growth
deceleration phase
cryptic growth occurs
stationary phase
extended by low temperature
lag phase
commonly modeled as 1st order process with respect to biomass
death phase
growth is balanced
exponential growth phase
some portion of cells remain viable for a long time, but are altered,
death phase
no dependence on substrate concentration
exponential growth phase
caused by either build up of toxic products or depletion of substrate
deceleration phase
primary metabolites are produced
exponential growth phase
no cell division occurs
stationary phase
oxygen solubility in water at 25 deg and 1 atm
7 ppm
typical cause of limited oxygen transfer rate
stagnant liquid around bubble
a measure of amount of light that passes through a turbid sample
optical density
