27:34 duration 27 minutes 34 seconds
CHEM 110 2/19/24
Plastics (note that the recording didn't start until part way through class. sorry!
46:42 duration 46 minutes 42 seconds
CHEM 110 2/16/24
Natural polymers
47:50 duration 47 minutes 50 seconds
CHEM 110 2/14/24
Fermentation and elephant toothpaste