Microbial growth
See (Stolp, 1988, p. 158)
Environmental factors
- water potential (WP)
- temperature range
- pH range
- osmotic conditions
- atmospheric consitions
- oxydation-reduction potential (ORP)
- light
ORP
- quantitative measure (in volts) of the tendency of
chemical compounds or elements to donate
or accept electrons
- relative to the normal hydrogen electrode
at pH 1.0 and partial pressure or H2 of 1 bar
- strongly influenced by the H+ concentration
- in biological systems, controlled mainly
by oxygen concentration
- strict anaerobes grow only at low ORP
Revised by Ralph 30 July 1998