A universal indicator is used ... Stomach acid has a range of pH values, depending on how long ago you last ate! Solutions can be acidic, alkaline or neutral. For example, pure water is neutral ...

Building on the bright cyan fluorescent protein mTurquoise2, TurCaMP offers an inverse response to Ca2+ transients and is insensitive to pH changes within the physiological range. This makes it a ...

Shellfish are a good source of nutrition, and many people enjoy harvesting and eating them. Oysters, razor clams and mussels ...