Abstract: This invention comprises a device for measuring root pulling force (RPF) in a plant. The RPF device comprises a plant grasping mechanism, as well as a force measurement sensor. In certain embodiments, the device is automatic, so that the “hand of man” is not required to exert force on the plant while the root pulling force of the plant is being measured. Also disclosed is a root pulling force motion mechanism, which brings the RPF device into proximity of a plant to be measured. Further disclosed is a method for measuring root pulling force of a plant.

Abstract: Typically, an engine-compressor for compressing natural gas for use as a fuel has a single cooling circuit to cool both its combustion unit and compression unit. A single cooling circuit design is not ideal because the optimal temperature for the combustion unit is higher than the compression unit of the engine-compressor. The present invention provides a dual zone cooling system to cool the combustion unit separately from the compression unit.

Abstract: Disclosed herein is a device for measuring root pulling force (RPF) in a plant. The RPF device can comprise a plant grasping mechanism, as well as a force measurement sensor. The device can be automatic, so that the “hand of man” is not required to exert force on the plant while the root pulling force of the plant is being measured. Also disclosed is a root pulling force motion mechanism, which brings the RPF device into proximity of a plant to be measured. Further disclosed is a method for measuring root pulling force of a plant.

Abstract: Typically, an engine-compressor for compressing natural gas for use as a fuel has a single cooling circuit to cool both its combustion unit and compression unit. A single cooling circuit design is not ideal because the optimal temperature for the combustion unit is higher than the compression unit of the engine-compressor. The present invention provides a dual zone cooling system to cool the combustion unit separately from the compression unit.

Abstract: Embodiments of a pump system include a bioreactor containing a media with live algae cultures, a gas vent line, a pressurized gas line, a valve system in fluid communication with the gas vent line and the pressurized gas line, a fluid outlet, and a pump chamber in fluid communication with the bioreactor, the valve system, and the fluid outlet. According to such embodiments, the valve system is configured to switch fluid communication with the pump chamber between the gas vent line and the pressurized gas line, and a lowest level of the pump chamber is lower than a highest level of the bioreactor. Such embodiments may also include a first valve configured to permit one-way flow from the bioreactor to the pump chamber, and a second valve configured to permit one-way flow from the pump chamber through the fluid outlet.