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An Experiment To Show The Effect OF Temperature On The passage Of Red Pigment From a Piece Of Beetroot

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Introduction

An Experiment To Show The Effect OF Temperature On The passage Of Red Pigment From a Piece Of Beetroot Apparatus & Materials 1 Cork borer Tripod Beaker Gauze Bunsen Beaker (200-300ml) Thermometer Colorimeter Beetroot Boiling tubes Measuring Cylinder Scalpel Method 1. Using a cork borer cut out 6 cylinders of beetroot. 2. Cut each cylinder to 5cm length. 3. Wash each cylinder for 1 minute. 4. Label 6 boiling tubes A,B,C,D,E,F respectively. 5. Pour 25ml of de-ionised water into boiling tube (A) ...read more.

Middle

The pigment is held in the cell by the cell wall and the cell membrane, which coats the inside. The cell wall is fully permeable and does not effect the passage of the pigment but the cell membrane holds the pigment inside. The cell membrane is a lipoprotein bi-layer and facilitates the transportation of particles in and out of the cell the pigment passes through channels in the membrane but this diffusion is limited by the size of the channels in the membrane. ...read more.

Conclusion

Evaluation The results were very accurate but there were a couple of variables which could have been controlled better. For example the temperatures of the tubes could have been controlled better because there was a slight variation of 2-3 degrees which may have affected the results and if an electric heater connected to a thermister was used then the temperatures could have been kept exactly constant. Also the surface area of the cylinders varied and would affect the speed of diffusion because the larger the surface area the faster diffusion takes place thus affecting results. ...read more.

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