Yeast culture

[rae]

I was looking through the Stage 4 Core science text book that we are using to support the National curriculum. One of the pracs requires a yeast culture. Has anyone done this and how did you get your yeast culture??

[smiley]

What are you going to do with your yeast culture?

[bindi]

same as bread.
Dry yeast, sugar, warm water will activate the yeast.
They are really, really small to see under junior microscope.
Its just discussed and viewed on computer here.

[rae]

Observing the process of budding in yeast. Years ago one of the ways to identify Candida albicans (thrush) was to look for budding under the microscope. Just wondered if anyone has done this?? Would you be able to use bakers dried yeast??

[smiley]

I've used ordinary Baker's yeast & a bit of sugar. Leave for a bit, until you can see that it's frothy, then drop some on some slides.

The trick is to clean the flask (or whatever container) very thoroughly with boiling water or sodium metabisulphite so that the yeast doesn't die.

[lada]

Yes, we use dried yeast( just supermarket brand. One I have now is Tandaco from Coles. It contains 98% baker's yeast