Page 1 of 1
pasteurs exp with cheese slices
Posted: 24 Nov 2006, 10:24
by louie
Hi Everyone ! I'm going through my bio book looking at what did and didn't work this year. If anyine knows the prac I'm refering to it's 7.4 pasteurs classic experiment in Heineman Biology Activity Manual. Well nothing much grew on any of the pieces of cheese. Any ideas or better alternatives would be appreciated
Sue
Posted: 24 Nov 2006, 11:00
by Ocker
Hey Sue
For this I make2 conical flasks / group
1 with air trap delivery tube & 1 with Straight vent tube
half fill both with chicken broth fron supermarket sit both on hotplate and boil, within a week the vented one grows fur, while the air trap remains free of bacteria
Posted: 24 Nov 2006, 12:20
by Ocean Breeze
Hi Sue..
I set up the same apparatus as Graeme. I buy a chicken neck from supermarket, and boil up a broth brew. Has worked well for us.
cheese slice exp
Posted: 24 Nov 2006, 12:37
by louie
Thanks Guys will do
Posted: 24 Nov 2006, 12:57
by louie
How many bends do I need to make an air trap delivery tube
2 ?
Posted: 24 Nov 2006, 13:20
by Ocean Breeze
Yes, 2 bends. You can buy then cheaply from brewing supplies.. couple of dollars.
Posted: 27 Nov 2006, 09:29
by louie
Clever thinking Rainbow sky ...thanks