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Hair Lab Report - investigate the force needed to break down a hair and to investigate if characteristics found in different hairs make a change in the strength these have.

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Introduction

Hair Lab Report Aim: To investigate the force needed to break down a hair and to investigate if characteristics found in different hairs make a change in the strength these have. Hypothesis: There will be hairs which would be more resistant; therefore they will resist more weight. I think that hairs which weren't chemically treated will be stronger than the ones which were. Also I think the type of colour will be reflected on the strength of these hairs. Materials: * 12 hairs, 3 per person * Ruler * Weights (100g) * Clamp stand * Force meter Diagram: Method: 1. Cut three hairs from four different girls 2. Measure each, take note of these measurements. ...read more.

Middle

treated 60 150 Sabrina hair n� 1 Brunette- straight No treated 76 140 Sabrina hair n� 2 Brunette- straight No treated 75 190 Sabrina hair n� 3 Brunette- straight No treated 76 200 Victoria hair n� 1 Brunette- wavy Chemically treated 50 100 Victoria hair n� 2 Brunette- wavy Chemically treated 50 150 Victoria hair n� 3 Brunette- wavy Chemically treated 50 100 Conclusion: Our aim was to investigate the force needed to break down a hair and to investigate if characteristics found in different hairs make a change in the strength these have. We carry the steps mentioned in the method to accomplish the aim. In this experiment, the dependant variable is the strength of the hair, and the independent variable was the different hairs. ...read more.

Conclusion

One of these reasons can be that the cysteine bonds are too weak; therefore they couldn't resist much weight. Another reason, it's the lack of keratin. Keratin is an example of a fibrous protein. Keratin is linked with cysteine by covalent bonds to form disulphide bonds. The more disulphide bonds produced, the stronger the fibrous protein is. By looking back to my hypothesis, I realize that I what I thought before doing the experiment wasn't very different to the results presented. However, the experiment proved with results for example, that certain colors represent more strength than other colors. The experiment was done correctly, however I believe there could have been improvements to reduce errors in results. For example, dividing chemically treated hairs from non treated hairs and also diving hairs in terms of colors. This would have allowed to obtain more precise results. ...read more.

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