Abstract: The present invention provides an apparatus that can be used to connect a flash chromatography instrument to a fraction collector and a mass detector to perform mass-directed flash chromatography.

Abstract: A filtering apparatus for an air treatment apparatus (5), a superior purity of the filtered air being required. The apparatus has a plurality of filter cartridges (3), provided with filters (2) and inserted into one cassette (4) each. The cassettes are fastened in the air treatment apparatus and the filter cartridges (3) have, on their side, which is turned towards the incoming air stream, a seal (6), which extends in an axial direction and around the periphery and axially abuts a surface, which is oriented radially in relation to the air stream and the apparatus or the like respectively and which surrounds an outlet opening (9), defined by each filter cartridge.

Abstract: The invention relates to an arrangement (1) for a Christmas tree stand (2) comprising a bottom part (3) and a tree-accommodating supporting part (4; 304) which is supported by the bottom part (3; 303), whereby adjustment means (5) are provided between the aforementioned pails (3, 4) to permit adjustment of the aforementioned tree-holding supporting part (4) at the desired angle. The central part (9) of the bottom part (3) exhibits a curved external convex contact surface (10) for the purpose of forming a supporting surface along the same for a spring (8) capable of making contact with it. A connection (11) extends through the central part (9) between the spring (8) and a holder (18) capable of being accommodated in the internal accommodating part of the aforementioned central part, which holder is attached to the supporting pan (4) and the spring (8).

Abstract: A sensor for an air-conditioning system in a vehicle has a measuring head with a number of solar cells arranged in a defined pattern for determining the intensity of the solar radiation and the position of the sun relative to the sensor. Attachment elements on the sensor permit assembly of the sensor only in one way in the vehicle. A dome over the solar cells is transparent only to solar radiation.