Abstract: The invention relates to a method for the amplification of DNA and apparatus for such amplification. The method comprises steps typically found in amplification methods but utilizes an optical procedure to detect denaturation of DNA or attainment of the desired denaturation temperature. The apparatus (1) comprises a temperature controllable chamber (2) including a rotor (3) for holding a plurality of reaction vessels (see 7 for example) for reaction mixtures including DNA, a drive means for the rotor, a heater (8) within the chamber for transiently supplying infrared energy to the reaction vessels, and an optical system (12-16) for determining denaturation of at least a reference DNA or for detecting attainment of a desired denaturation temperature in at least a reference reaction vessel.

Abstract: The invention relates to a device for performing binding assays. In particular, the invention relates to a centrifugal device for performing such assays. The invention also relates to a method of performing binding assays involving antigen-antibody binding, nucleic acid hybridization, or receptor-ligand interaction.

Abstract: The invention relates to a device for performing binding assays. In particular, the invention relates to a centrifugal device for performing such assays. The invention also relates to a method of performing binding assays involving antigen-antibody binding, nucleic acid hybridization, or receptor-ligand interaction.

Abstract: The invention relates to a device for performing binding assays. In particular, the invention relates to a centrifugal device for performing such assays. The invention also relates to a method of performing binding assays involving antigen-antibody binding, nucleic acid hybridization, or receptor-ligand interaction.

Abstract: The present invention provides a thermal cycling device including: a heat exchanger body (3) having a longitudinal axis and longitudinally divided to provide at least two segments which are able to be heated to different temperatures so that said body has peripheral surfaces of different temperatures; a conduit (2) extending about said body so as to be in thermal contact with said peripheral surfaces; a first delivery device to deliver a first fluid to said conduit to cause said fluid to pass therealong and therefore change in temperature as the fluid passes said segments; and a second delivery device to deliver a second fluid to said conduit so as to flow with said first liquid and therefore also change in temperature. The fluid then leaves the device by conduit (4).