ISSN:
1750-3841
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
,
Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
Notizen:
SUMMARY –Although temperatures occurring in nature are constantly fluctuating, virtually all research involving temperature effects on organisms has been carried out at constant temperatures. An investigation was made to determine the effect mild cycling of temperature has on certain species of bacteria. The effect of constant and cycled-up or cycled-down temperatures was determined for Pseudomonas fluorescens. A thermal gradient-bar proved to be a rapid, efficient method for determining these effects, affording a wide range of temperatures with only a few degrees difference between two consecutive temperatures. Cycling effects appeared to be dependent upon the organism and whether or not the temperature was above or below the optimum growth temperature. In general, the cycled-down growth responses appear to be greater than those for the cycled-up responses. At temperatures both above and below the optimum, the cycled-down organisms produced greater growth responses than the cycled-up organisms. The constant values are only a small amount greater than the cycled-down values.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1365-2621.1971.tb03304.x
