Scientists have discovered that an element in Prussian blue, a substance commonly used to give jeans their blue color, ...

Scientists have developed a new hydrogel electrolyte that can significantly enhance the performance of sodium-zinc hybrid ion batteries.

and examine the ash. BLUE COLORS.—These may consist of indigo, logwood, prussian blue or ultramarine. Indigo blue is fixed on cloth in various ways,—1st, in the blue vat; 2nd, as so-called ...