In this work, wavelengths were determined for the robust and simultaneous measurement of film thickness, urea concentration fluid temperature. Film parameters such as temperature composition are typically dynamically interdependently changing. To gain knowledge these quantities, a method is required that offers high temporal resolution while being non-intrusive so to not disturb well process co...

In this paper, urea biosensors based on detection of pH and ammonium ions are presented. As transducers pH-sensitive ion-selective field effect transistors (ISFETs) and chemically modified FETs (ChemFETs) sensitive to ammonium ions were used. Results concerning urea determination by the biosensors in blood plasma and in dialysate show that the biosensors can be applied for urea monitoring in th...

All methods for the determination of urea in urine dependent on purely chemical processes for the hydrolysis of the urea are apparently destined to become antiquated, if not forgotten, because of the abundant supply of urease now available for such hydrolysis. It would be easy to devise an excellent direct Nesslerization method for the determination of urea in urine on the basis of the Folin-Pe...

Experimental investigations with mammalian adipose tissue require a determination of adipocyte number as a basis for expression of metabolic and growth data. Determination of cell size is also important in adipose tissue because the fivefold or greater variation in adipocyte diameter in most growing and adult mammals precludes simple determination of cell number to interpret the biological obse...

Urea is an essential molecule for life and the environment. In particular, in biological fluids, urea concentration can be indicative of several pathologies. Herein, we propose a photoelectrochemical system activated by infrared irradiation (850 nm) detection urea. Our sensor made photoactive Si photoanode protected silicon oxide/Ni thin film coated with Ni–Mo–O that catalyzes oxidation reactio...