Beanpower: Surely you jest? LoL. Farmers don't do that.
Ok one more thought before I leave you to your own devices. While a vacuum may select for the expression of the action of the (theoretical) nanobacterium, it is more likely that the force of gravity is somehow directly related. The mechanism may be something like:
The forces governing the behavior of larger molecules are diminished in a low gravity environment - and allow the expression of the action of the nanobacterium to play a greater role. Again there is precendent for the potential difference in behavior in nature, in that large and small structures and systems at times appear to obey different laws of nature. Physicists run across this problem all the time and have tried as a result to come up with a Unified Theory. Perhaps nanobacterium are at the boundary between the "large" and the "small" worlds - belonging to neither but incorporating some of the characteristics of each. Certain of those characteristics are enhanced in a low - gravity environment, for nano, but surpressed for larger orgainic and inorganic structures.
JL