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It is like baking a cake: If you mix eggs, flour, milk and sugar, you can get completely different types of dough, depending on the mixing ratio.

They measured the CO2 mixing ratio, the proportion of carbon dioxide in the air.

Fertilize every three to four days with a solution that is half the strength of the recommended mixing ratio.

It’s the first time SodaStream has sold an alcoholic mixer for sparkling water, and according to the company, “Sparkling Gold contains 10 percent alcohol by volume when prepared using the recommended mixing ratio of one part 'Sparkling Gold' concentrate to five parts sparkling water” — which is not to say that you couldn’t add more if you wanted to add a punch to your toasts.

A steady-state mixing ratio of approximately 250 p.p.t.v. of α-pinene was established in the chamber in the presence of 35 p.p.b.v. ozone and no injection of SO2.