Abstract: This paper presents the development of a simple, low cost, the new type of urea sensor, and suitable for water quality monitoring. Here, urease is immobilized on the electrodes using ...

Correspondence to: Dr M D Crossland UCL Institute of Ophthalmology, 11-43 Bath Street, London EC1V 9EL, UK; m.crossland{at}ucl.ac.uk Background: Contrast sensitivity measurement in UK clinical ...