Abstract: A wrist-worn device having the form of a continuous loop. The device comprises a plurality of elongate links, each link comprising at least one magnet, the links being connected to form a chain with neighbouring links being pivotable with respect to one another about a pivot axis that is substantially radial with respect to said loop. The magnets of neighbouring links have a respective positioning and polarity to provide an attractive force between the pair of neighbouring links when the pair of neighbouring links are in a side-by-side arrangement, whereby the chain of links has a first configuration in which the links are retained by the attractive force in the side-by-side arrangement, and a second configuration of greater length than the first configuration.

Abstract: A wrist-worn device having the form of a continuous loop. The device comprises a plurality of elongate links, each link comprising at least one magnet, the links being connected to form a chain with neighbouring links being pivotable with respect to one another about a pivot axis that is substantially radial with respect to said loop. The magnets of neighbouring links have a respective positioning and polarity to provide an attractive force between the pair of neighbouring links when the pair of neighbouring links are in a side-by-side arrangement, whereby the chain of links has a first configuration in which the links are retained by the attractive force in the side-by-side arrangement, and a second configuration of greater length than the first configuration.

Abstract: Apparatus comprising a module for detecting a single nucleotide polymorphism, SNP, within a genome and comprising: four reaction chambers for receiving a fluid sample, the reaction chambers each containing a different one of the bases A, C, G, T, and a primer; a reference electrode which in use is immersed in said fluid sample; a pair of Ion Sensitive Field Effect Transistors, ISFETs, associated with each reaction chamber, the ISFETs of each pair comprising respective sensing membranes, or a common sensing membrane, exposed within the associated reaction chamber; and a plurality of difference detectors, each difference detector having a pair of inputs coupled respectively to outputs of ISFETs associated with different reaction chambers.