Journal of Student Research 2023

Journal of Student Research

38

Stress (N/mm^2)

Stress (N/mm^2)

Hair

Strain 2.0619 1.7732 1.8388 2.0741 2.0397 1.9218 2.3945 1.9210 1.8885 1.8842

Hair

Strain 1.3901 1.7917 1.7591 1.7034 1.8217 1.7042 1.8490 1.6943 1.7324 1.5597

1 2 3 4 5 6 7 8 9

179.65 175.26 143.74 191.29 173.71 148.20 129.13 198.94 165.21 171.18 167.63

1 2 3 4 5 6 7 8 9

180.04 142.86 119.49 127.24 152.12 148.85 122.23 131.85 151.65 134.61 141.09

10

10

Average ST Dev % Deviation

1.98 0.18

Average ST Dev % Deviation

1.70 0.14

21.68

18.12

12.93

8.88

12.84

7.98

Table 4b: Citric Acid Set 2.

Table 4a: Citric Acid Set 1.

Hair

Stress (N/mm^2)

Strain

Average ST Dev

154.3625 23.73636 15.37702

1.840165 0.20946 11.38265

% Deviation

Table 4c: Citric Acid Set 3.

Table 4 includes the stress and strain values for the citric acid chemical treatment. Two sets of ten hairs were subjected to this treatment and split into set 1 and set 2. These samples were run with a 50.128% w/w citric acid solution for a total of four days. Table 4 is split into three tables, Table 4a, 4b, and 4c. Table 4a includes the stress and strain values for set 1, Table 4b includes the stress and strain values for set 2, and Table 4c includes the average, standard deviation, and % deviation for set 1 and 2 combined.

Stress (N/mm^2)

Hair

Strain

1 2 3 4

195.6 0.439 235.8 0.469 198.9 0.543 171.7 0.511 200.5 0.490 26.5 0.053

Average ST Dev

% Dev 13.2 10.85 Table 5: Sodium Chloride Pre-Trial.

Table 5 includes the stress and strain values for the sodium chloride treatment. These samples were run with a 25.098% sodium chloride solution for a total of four days. The sodium chloride treatment data is more limited than the other treatments as only a pre-trial including four samples was run.