This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American I remember learning about acids and bases (or ...

pH meters are electric appliances used for measuring the- alkalinity or acidity of a solution. pH is measured using potentiometric methods or pH indicators such as indicator solutions or strips ...

Functional imaging of the brain has opened new avenues for answering questions about the underpinnings of human behavior. Current methods rely on measuring changes in blood oxygen levels in the brain, ...