Functional analysis of putative transporters involved in oligotrophic growth of Rhodococcus erythropolis N9T-4.

Rhodococcus erythropolis N9T-4, which is an extremely oligotrophic bacterium, can survive in a completely inorganic medium with no additional carbon source. This bacterium utilizes atmospheric CO, but does not require any additional energy source such as light and hydrogen gas, required by autotrophic microorganisms. However, its CO fixation and energy-acquisition systems in the oligotrophic growth remain unrevealed.

Establishment of an effective oligotrophic cultivation system for Rhodococcus erythropolis N9T-4.

Rhodococcus erythropolis N9T-4 grows on an inorganic solid-state medium with no additional carbon and energy sources; however, it is unable to grow well in a liquid culture medium under the oligotrophic conditions. We examined submerged cultivations of N9T-4 using a polyurethane foam sponge to achieve approximately 10 times of the oligotrophic growth of the bacterium in the liquid culture medium.

The impact of adenosine pharmacologic stress combined with low-level exercise in patients undergoing myocardial perfusion imaging (BIWAKO adenosine-Ex trial).

Background: The combination of adenosine infusion with low-level exercise has become a common approach for inducing stress during stress myocardial perfusion imaging (MPI). We investigated stress MPI performed by combined low-level exercise and adenosine infusion. This combined protocol can decrease adverse reactions and reduce the effect of scattered rays from the liver.

Simulation of C. elegans thermotactic behavior in a linear thermal gradient using a simple phenomenological motility model.

The nematode Caenorhabditis elegans has been reported to exhibit thermotaxis, a sophisticated behavioral response to temperature. However, there appears to be some inconsistency among previous reports. The results of population-level thermotaxis investigations suggest that C.