Australia's Science Forum

I'm sure Pasteur didn't have results in a week. I actually thought that the stock cubes had too much salt in them for a good growth. We use stock made from chicken wings and they have worked well the last few years!

We found that the broth you buy from supermarkets never grows mould. It might in your home fridge but it never did at work. I think there are preservative sin it to prevent mould.
Boil up some chicken wings/breast whatever, strain the solids off .. it works.. warming the flasks over time works.
We put the whole prac in a tray on top of a cupboard and go back a month later... well I go back a little earlier to make sure it is growing, and if not - cheat.

THANKS FOR YOUR INPUT EVERYONE !!!!!!

So now I'm going to Cairns,much warmer than here at the moment.
Cheers
Mother

The dreaded Pasteur experiment! Do others filter your broth? My teacher likes it to be clear but it takes absolutely forever! This year I am trying Continental Stock Broth in little pottles. It says there are no preservatives but I have just read that it has thickeners and I suspect that is contributing to the globbing up of the filter paper. I put it through a sieve first but it is still taking forever.
Kathryn :(

We buy in Nutrient Broth powder. It makes a lovely clear broth.