Activating the yeast in a bowl with lukewarm water and sugar will result in a bubbly, foamy mixture if it is still alive and well. Because active dry yeast has larger granules, it also typically ...

Ultimately, it's the same product but different structures -- active dry yeast needs to dissolve in water for it to 'activate', while instant yeast can be mixed directly into your dry ingredients ...

The indirect effect occurs when chemically active intermediates are formed by the action of ionizing radiation on water surrounding ... types of action, yeast cells in the dry and the wet state ...