lecture6(2)

lecture6(2) - Lecture 6 6.12. Effect of Temperature on...

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6.12. Effect of Temperature on Growth 6.13. Microbial Growth at Cold Temperatures 6.14. Microbial Growth at High Temperatures 6.15. Microbial Growth at Low or High pH 6.16. Osmotic Effects on Microbial Growth 6.17. Oxygen and Microbial Growth 6.18. Toxic Forms of Oxygen Lecture 6 Lecture 6
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effect of temperature on growth rate effect of temperature on growth rate : : opt, min, max growth temp are characteristic of given organism may be modified by other environmental factors, e.g., growth medium composition
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variations in temperature optima variations in temperature optima : :
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psychrophiles psychrophiles : : optimum growth temperature 15ºC or lower maximum less than 20ºC minimum 0ºC many very sensitive to moderate temperatures enzyme denaturation at moderate temp greater proportion of unsaturated fatty acids in membrane phospholipids than mesophiles example habitat: ocean depths - constant temperature below 5ºC
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psychrotolerant microorganisms: able to grow at 0°C optimum growth temperature 20-40°C can think of as “mesophiles capable of growth at low
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This note was uploaded on 03/19/2011 for the course BIOL 140 taught by Professor Dr.joshneufeld during the Spring '10 term at Waterloo.

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lecture6(2) - Lecture 6 6.12. Effect of Temperature on...

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