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To investigate the relationship between the time taken for diffusion and cell dimension.
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Banu Thuraisingam Aim: To investigate the relationship between the time taken for diffusion and cell dimension. Procedure: 1. Place the gelatin block on a tile or Petri dish and use a scalpel or razor blade to cut it in half, producing two cubes of 10mm sides 2. Keep on of these cubes intact and cut the other in half 3. Repeat this cutting operation until you have 4 more cubes. 4. Fill a test-tube to within 10ml of the top with dilute HCl 5. Note the time: starting with the largest block drop all the blocks into the acid in the test-tube and close it securely with a rubber bung or cork. 6. Tilt the tube to spread the gelatin blocks along its length. Hold the tube horizontally and rotate it so that you can see each block clearly and from all sides. Try not to warm the tube too much with your hands or the gelatin...
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