Abstract: The invention relates to a novel pan-monocyte/pan-monocyte-derived cell biomarker and the use of an antibody immunospecific to the marker. The invention extends to methods for isolating and detecting human monocytes and monocyte-derived cells from biological samples, such as blood, based on the marker and the antibody.

Abstract: A heating plant has a fuel container with an evaporation space or chamber from which evaporated fuel is passed to a combustion chamber. Combustion gases pass from the combustion chamber through a heating tube, for discharge, while part of said gases is fed back to the evaporation chamber. The feedback path has variable insulation or flow control to control the feedback gas temperature thus to maintain constant the amount of heat fed back, irrespective of the combustion chamber heat output. The connections of evaporation chamber to combustion chamber and evaporation chamber to heating tube, by way of the gas feedback tube, are rendered more secure by mechanical support means such as bracing struts, to resist operating and transportation stresses.