Plastic assay cuvette having low birefringence

G - Physics – 01 – N

Patent

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Details

G01N 21/03 (2006.01) B01L 3/00 (2006.01) B01L 3/08 (2006.01) B29C 45/00 (2006.01) G01N 21/25 (2006.01) G01N 33/53 (2006.01) G01N 33/537 (2006.01) G01N 33/538 (2006.01) G01N 33/542 (2006.01) G01N 33/543 (2006.01) G01N 35/02 (2006.01) H01J 49/04 (2006.01) B01L 9/06 (2006.01) G01N 1/00 (2006.01) G01N 35/00 (2006.01) G01N 35/04 (2006.01) G01N 35/10 (2006.01)

Patent

CA 2129246

A plastic assay cuvette (506) having the desired optical properties for the analysis of a test sample or reaction mixture thereof, and a method for making such a plastic assay cuvette (506), are described. The optical properties of the plastic assay cuvette (506) are substantially the same as the optical properties of glass wherein low birefringence throughout the optical read region (516) thereof is provided. When used for the analysis of a test sample or reaction mixture thereof, such as in fluorescence polarization assays and absorbance assays, the plastic assay cuvette (506) provides accurate and reproducible disposable assay cuvette which can be used in place of conventional glass assay cuvettes.

Une valve cardiaque comprend un tube ou un anneau doté d'une entrée et d'une sortie, d'une ouverture centrale (4), et de volets (9a-c), pouvant s'ouvrir ou se fermer pour permettre au sang de passer dans cette ouverture centrale (4) dans une direction, et conçus en segments de cercle, où l'angle de secteur alpha vaut 360 /n, où n représente le nombre de segments de cercle et vaut de 3 à 6. Ces volets (9a-c) sont raccordés, de manière à pouvoir pivoter, à l'intérieur de l'anneau (3) au niveau de son entrée, au moyen d'une charnière disposée au centre de chacun de leurs bords externes et logée dans un évidement pratiqué dans l'anneau (3). Ces volets coopèrent ainsi, en position fermée pour former un obturateur étanche, et en position ouverte pour laisser le sang s'écouler librement.

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