资讯

The International Union of Pure and Applied Chemistry (Iupac) has launched a set of guiding principles of responsible chemistry with the aim of transforming how chemistry is practised, taught and ...
Black eye makeup, or kohl, used between the 9th and 7th centuries BCE in the northwest of Iran contained natural graphite and ...
While each of these industries faces its own challenges, they are united by the themes outlined in Anthony King’s exploration ...
Document's postponement follows recent suspension of staff at Environmental Protection Agency for releasing similar ...