Transgenic plants containing recombinant barley alanine aminotransferase are described. The controller includes a triggering arrangement and a modulation arrangement. The unknown samples may include earth formations in which a NMR sensor assembly is conveyed in a borehole. The elastic device is formed in the receptacle and further on the first bearing. The hot water tank, the cold water tank and the beverage concentrate reservoir are in selective communication with a mixing valve wherein hot or cold water and beverage concentrate are mixed to produce a desired hot or cold beverage.