The researchers then identified and adapted three colorimetric chemical sensors that produce a color change in response to biomarkers. The first sensor was a rather simple pH indicator consisting ...

Vets first test a pet’s urine using a dipstick test strip with colorimetric indicators before following up with more specific tests if necessary. These test strips may include tests for pH and ...

A colorimetric analytic formulation was injected into the skin instead of tattoo ink. The pigmented skin areas varied their color when blood pH or other health indicators changed. The art of ...

The indicator materials change optical properties ... This method is ratiometric and relatively unaffected by drift. Colorimetric pH sensors also can be implemented as reflective sensors immune ...

Typically, UV-activated oxygen indicator ink is spread onto the food contact side of the package films and then encapsulated in a polymer film. Researchers introduced carrageenans to develop ...