Monolithic bioelectronic devices for the detection of ammonia includes a microorganism that metabolizes ammonia and which harbors a lux gene fused with a heterologous promoter gene stably incorporated into the chromosome of the microorganism and an Optical Application Specific Integrated Circuit (OASIC)....http://www.google.com.au/patents/US7208286?utm_source=gb-gplus-sharePatent US7208286 - Bioluminescent bioreporter integrated circuit devices and methods for detecting ammonia
