SAN FRANCISCO – State Senator Scott Wiener, D-San Francisco, introduced a bill on Tuesday that would prohibit law enforcement from making arrests or filing charges based only on certain field tests ...

The basic working principle of colorimetric sensing is colorimetry, which is a visible change in color that results from a chemical interaction between the sensing/detecting material and the target ...

However, remote or at-home testing introduces various additional logistical and technical issues, such as guaranteeing timely test delivery to a testing user, providing test delivery from a testing ...

Colorimetrix, a new app developed by researchers at the University of Cambridge (UK), turns any smartphone into a handheld spectrophotometer that can read and deliver results from colorimetric tests.