ABOUT ten years ago, Messrs. Adam Hilger, Ltd., the well-known firm of optical instrument makers, first undertook to place on the market substances of a high degree of purity such as could be ...

Discovery of pure organic substances exhibiting the quantum spin liquid state. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2014 / 06 / 140623091637.htm ...

Revise pure substances and mixtures for your GCSE chemistry foundation and higher triple science exams with Bitesize interactive practice quizzes covering feedback and common errors.

THE second International Congress on Pure Foods and Alimentary Substances, held in Paris on October 17–24, will be memorable as having brought together more than 2000 delegates and members from ...