11. ORGANISMS AND THERMAL ENERGY
507
TABLE IV
INFLUENCE OF TEMPERATURE ON THE NUTRITIONAL REQUIREMENTS OF
THERMOPHILIC BACTERIA, ACCORDING TO CAMPBELL AND WILLIAMS'
1
Organism
Bacillus coagulans 2
Bacillus coagulans 1039
Bacillus coagulans 32
Bacillus stearothermophilus
1356
Bacillus stearothermophilus
3084
Bacillus stearothermophilus
4259
Bacillus stearothermophilus
5149^5
Nutritional requirements at
36°
Histidine
Thiamine
Biotin
Folic acid
Thiamine
Biotin
Folic acid
Methionine
Tryptophan
Thiamine
Biotin
No growth
Biotin
Folic acid
Biotin
Folic acid
Methionine
Thiamine
Biotin
Folic acid
45°
Same as at 36°
Same as at 36°
Histidine
Methionine
Tryptophan
Thiamine
Biotin
Folic acid
Leucine
Thiamine
Niacin
Biotin
Same as at 36°
Methionine
Histidine
Niacin
Biotin
Folic acid
Biotin
Folic acid
55°
Same as at 36°
Histidine
Methionine
Thiamine
Niacin
Biotin
Folic acid
Same as at 45°
Same as at 45°
Thiamine
Biotin
Folic acid
Same as at 45°
Same as at 45°
«L. L. Campbell and O. B. Williams, /. Bacteriol. 65, 141-145 (1953).
It may also be mentioned that the curves for killing of bacteria are
logarithmic with time (204, 205). This sort of curve has been interpreted as evidence that death occurs as the result of the destruction
of a few key catalysts in each cell, rather than denaturation of large