A student exhales through a straw into a solution of tap water and aquarium pH indicator. The changing colour demonstrates that increasing the amount of dissolved carbon dioxide causes water to become ...

Scientists use a scale called the pH scale to measure how acidic or basic something is. The scale runs from 0 to 14. Where 0 is the most acidic and 14 is the most basic. Around the middle we have ...

Stimuli-responsive gels have been actively studied and applied to a variety of devices such as drug carriers, artificial muscles and actuators. In this research study, calcium alginate gels containing ...