Which Joe gave his name to ‘sloppy joes’? We look at five interesting sandwiches and their lexical origins.
Any of a large class of synthetic dyes whose molecules contain two adjacent nitrogen atoms between carbon atoms.
- ‘Urobilinogen reacts with a chromogen to form an azo dye which appears as various shades of pink or purple.’
- ‘Thus Paul Ehrlich's Salvarsan was an arsenic analogue of an azo dye, and the first sulfa, or wonder, drug, Prontosil, was the metabolic product of a red azo dye.’
- ‘Orange smoke compositions, for example, are typically based on 50: 50 mixtures of azo dyes and reactants - a sugar like lactose or sucrose as fuel and an oxidiser such as potassium chlorate.’
- ‘Nitrite was determined spectrophotometrically upon diazotation and forming of azo dye.’
- ‘The products from these reactions are used in the production of an important class of dyes, the azo dyes.’
We take a look at several popular, though confusing, punctuation marks.
From Afghanistan to Zimbabwe, discover surprising and intriguing language facts from around the globe.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.