Lab #9
Stress
Factors on Cellular Membranes
I suggest, in your lab report, that you examine
this data, interpret the implications (if any), and construct individual graphs
for each treatment. Remember that
there was a control for each treatment designated in bold and with
an *.
1. Methyl Alcohol
Treatment
|
% Alcohol |
Light Absorbance
(%) Colorimeter set for blue
light wavelength (450 nm) |
|
*0 |
21 |
|
10 |
59 |
|
30 |
73 |
|
50 |
75 |
|
80 |
81 |
|
100 |
83 |
2. Detergent
|
Number of Detergent
Drops |
Light Absorbance (%) |
|
*0 |
18 |
|
2 |
46 |
|
4 |
58 |
|
6 |
45 |
|
8 |
53 |
|
10 |
49 |
3. Osmotic Pressure
|
NaCl Concentration,
moles/liter |
Light Absorbance (%) |
|
*0 |
22 |
|
0.2 moles/liter |
32 |
|
0.7 moles/liter |
33 |
|
1.0 mole/liter |
37 |
|
1.2 moles/liter |
43 |
|
1.5 moles/liter |
42 |
|
2.0 moles/liter |
61 |
4. Hydrogen Peroxide
|
% H2O2
|
Light Absorbance (%) |
|
*0 |
25 |
|
6 |
29 |
|
15 |
71 |
|
24 |
75 |
|
30 |
70 |
5. pH
|
pH number |
Light Absorbance (%) |
|
3 |
70 |
|
4 |
66 |
|
*7 |
24 |
|
11 |
10 |
|
12 |
8 |
6. Temperature
|
0 Centigrade |
Light Absorbance (%) |
|
6 |
15 |
|
12 |
22 |
|
*19 |
28 |
|
52 |
33 |
|
98 |
91 |