Abstract: The present invention relates to compositions comprising a metal, a metal aggregation inhibitor, and a colour changing agent. The metal is bindable to the colour changing agent to provide a change in colour on binding and/or release thereof.

Abstract: An engine comprises an air intake arrangement configured to receive air; a heat exchanger arrangement arranged downstream of the air intake arrangement, configured to cool the air, and comprising a plurality of heat exchanger modules; and one or more turbomachinery components configured to receive cooled air from the heat exchanger arrangement. The plurality of heat exchanger modules are arranged to be generally centred on and to be arranged along a longitudinal axis of the engine. At least one of the plurality of heat exchanger modules is arranged to at least partially overlap with at least one other one of the plurality of heat exchanger modules relative to the longitudinal axis of the engine.

Abstract: The present invention relates to compositions comprising a metal, a metal aggregation inhibitor, and a colour changing agent. The metal is bindable to the colour changing agent to provide a change in colour on binding and/or release thereof.

Abstract: A pocket carried work light has an elongate body with a first end, a second end, and defines a medial channel extending between the ends, the medial channel carrying a battery. A first electrode in the medial channel that electrically communicates with the battery and an electric circuit, a second electrode in the medial channel that communicates the battery and with the electric circuit and a switch communicating with the electric circuit. A pocket clip carried by the body and extending spacedly adjacent and parallel thereto, the pocket clip carrying a low intensity LED on a second surface opposite the body, the LED electrically communicating with the circuit to emit light waves when the electrical circuit is completed by operation of the switch.

Abstract: A reactor for the plasma assisted processing of gaseous media, including a cylindrical reactor bed of gas permeable dielectric material contained between two co-axial electrodes, wherein the inner electrode has associated with it a number of radially projecting vanes or disks made of a dielectric material having a permittivity greater than that of the reactor bed material.