MICRB265 Lecture Notes - Acidophile, Sodium Chloride, Toothpaste
21 Oct 2013
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Minimum cell yield to maximize product: wastewater treatment, to lower rate of discharge, continuous growth and harvesting cells, cells are growing at a stead state of exponential growth. Their normal is out extreme : different environmental factors, temperature. Pure water to 30% nacl water: presence/absence of oxygen, pressure. Barophiles live at high pressures: radiation. Effect of temperature on growth: huge effect on viability, reactions that rely on enzymes are temperature sensitive, high temperatures, membrane disruption. Pigment production deg. c: most pathogenic bacteria are mesophiles (8-48 deg. c survival range optima @ 39 deg. c, hey! They survive best at human body temperature hint hint. This is how we know to refrigerate our food to prevent/slow down spoilage. Cold environments: pyschophiles love, pyschrotolerant can grow @ but have a mesophilic optima at 20-40 deg. c, high concentrations of unsaturated fatty acids (which solidify at lower temperatures)
