Abstract: In one general aspect, an electrophoretic measurement method is disclosed that includes providing a vessel that holds a dispersant, providing a first electrode immersed in the dispersant, and providing a second electrode immersed in the dispersant. A sample is placed at a location within the dispersant between the first and second electrodes with the sample being separated from the electrodes, an alternating electric field is applied across the electrodes, and the sample is illuminated with temporally coherent light. A frequency shift is detected in light from the step of illuminating that has interacted with the sample during the step of applying an alternating electric field, and a property of the sample is derived based on results of the step of detecting.

Abstract: A loading device for lifting and loading cargo onto aircraft includes a support frame and at least one lift platform that can be raised and lowered relative to the support frame. A retractable barrier is provided between the lift platform and the support frame to provide a physical and visual cue to impede or discourage persons from intruding into dangerous areas of the loading device during raised operation.