Class notes
Class Notes: Lecture 9 of M118L Course at UCI
- Institution
- University Of California - Irvine
Notes cover lecture 9 video of M118L course at University of California, Irvine. Reviews "Aged versus Un-aged Cells" lab experiment.
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Lecture 9Abbreviations:
Wednesday, February 24, 2021 10:45 AM Ex. = for example,
Expt = experiment
b/w = between
b/c = because
• Aged v. Unaged cells: w/ = with
v. = versus
INC = increase
○ Do NOT look for crossover, look for individual trends and how they differ from one DEC = decrease
wks = weeks
another.
SG DECed to 1.005. what is alcohol content of beer? 0.6%
○ Un-aged cells' log CFU/ml should DEC significantly after 9 days. Aged cells
should stay the same, or INC slightly. -> Indicates aged outcompeted fresh
unaged cells and exhibited GASP phenotype.
• Lab Report Expt:
• "Old culture" will be grown over 2wks in LB, then transferred into Tube 1: fresh cells in LB.
Will measure CFU by serial diluting at 0,2,7 days. -> Hypothesis 1: Do we observe the
GASP phenotype?
• "Old culture" will be grown over 2wks in LB+X, then transferred into Tube 2: fresh cells in
LB+X. We will measure CFU by serial diluting at 0,2,7 days. -> Hypothesis 2: Does variable
X impact the GASP phenotype? (Will compare Tube 1 and 2 GASP phenotypes).
• This week's content:
• Beer ingredients: malt (grain--barley), hops (adds bitter taste), yeast (organisms converting
malt into ethanol alcohol), water.
• Beer protocol:
1. Boil wort.
2. Add hops and boil again.
3. Cool in ice.
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