A new study finds that ocean acidity may have prevented life on Earth from developing for the planet’s first 500 million ...

Some indicators are liquids, meaning we can add drops of the ... purple for strongly alkaline solutions. In the middle, neutral pH 7 is indicated by green. When using universal indicator paper ...

Study first author Dr Rattapol Phandthong said: "Users who vape aerosols produced from propylene glycol/vegetable glycerin alone or e-liquids with a neutral to basic pH are more likely to be ...

"Users who vape aerosols produced from propylene glycol/vegetable glycerin alone or e-liquids with a neutral to basic pH are more likely to be infected by the virus, while users who vape aerosols ...