Abstract: A system in filtration of air comprises a filter (4) for separation of particles and a means (3) for ionization of the air. In use of the system, ionization of the air occurs before the air passes said filter (4). The filter (4) is made up of fibers of polypropylene mixed with acrylic.

Abstract: The invention comprises a method of regenerating a biosensor. It involves passing a background flow of fluid without reactive components through the flow passage. At a selected point in time a sample aliquot is injected into said background flow. At a point in time when a signal from said sensor is obtained the flow rate of the background fluid is increased. The invention also comprises a system for continuous monitoring of analytes in a biological fluid, the system having increased life by virtue of inherent regeneration of sensors employed. It comprises a biosensor (26, 30, 32), a sampling device (4) for providing a sample of said biological fluid, and means (10, 15, 18, 24) for passing a flow of a background fluid through said flow passage at selectable flow rates, means (20, 50, 55) for injecting said sample into said flow of background fluid, and means (50, 55) for increasing the flow rate of said combined flow. Means for achieving a washing action at the signal generating portion are provided.

Abstract: A micro-calorimeter apparatus comprises a thermostated housing (3,4,5); a pair of essentially flat heat sinks (9,10), suspended in said housing (2) and thermally floating relative to the environment inside the housing (3,4,5). The heat sinks (9,10) are arranged with their surfaces facing each other. A pair of Peltier elements (11) are thermally attached to said heat sinks (9,10), one element (11) on each heat sink (9,10), on said facing surfaces, forming a gap between them for the accommodation of a generally flat biosensor unit (12).