Later, in 1755, yeast were defined in the Dictionary of the English Language by Samuel Johnson as "the ferment put into drink to make it work; and into bread to lighten and swell it." At the time ...

They are often used in the production of biofuels, pharmaceuticals, flavours and fragrances, as well as in the more well-known fermentation processes of bread-making and beer-brewing. Being able to re ...