The yeast culture is generally maintained in plastic bottles and typical systems provide one bubble every 3-7 seconds.

Following 3 days of conversion from rice starch to sugars a yeast culture is added and alcoholic fermentation begins.

An active yeast culture from an on-going batch is added to the next boil after chilling to 80F.

In rapidly growing yeast cultures, all the cells can be seen to have buds, since bud formation occupies the whole cell cycle.

In yeast cultures growing more slowly, cells lacking buds can be seen, and bud formation only occupies a part of the cell cycle.

I had brought a yeast culture with me from Canaveral.

Typically, however, a friend shares a cup of the liquid yeast culture with people who would like to make this bread.

Nowhere else in the Galaxy was the pressure of population so great, the billions of people so numerous, that yeast culture had been developed.

The final byproduct, vinasse, is used as fertilizer or growth substrate for yeast cultures.

Those were a special high-sugar yeast culture with true-bred color and just a dash of flavor additive.