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The Effect of Artificial Sugar and Raw Sugar on the Daphnia’s Heartbeat

The Effect of Artificial Sugar and Raw Sugar on the Daphnia’s Heartbeat. Katie Clarke Nov. 7 2006. Purpose. To see how the daphnia’s heartbeat is affected by the artificial sugar and the raw sugar. Background- Daphnia. Over 150 species Males- 2 millimeters Females- 3-5 millimeters

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The Effect of Artificial Sugar and Raw Sugar on the Daphnia’s Heartbeat

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  1. The Effect of Artificial Sugar and Raw Sugar on the Daphnia’s Heartbeat Katie Clarke Nov. 7 2006

  2. Purpose • To see how the daphnia’s heartbeat is affected by the artificial sugar and the raw sugar.

  3. Background- Daphnia • Over 150 species • Males- 2 millimeters • Females- 3-5 millimeters • Diet of algae

  4. Background- Artificial Sugar (Aspartame) • Aspartic Acid • 40% • an excitotoxin • Can pass through the blood brain barrier

  5. Background- Aspartame • Phenylalanine • 50% • 4% is in protein we eat

  6. Background- Aspartame • Methyl Ester • 10% • Wood Alcohol • Breaks down into formaldehyde

  7. Background- Raw Sugar • Not processed • From crushed sugar canes • Thin coating of molasses

  8. Hypothesis • If the daphnia is exposed to artificial sugar containing aspartame the daphnia’s heartbeat will be higher than it would be with raw sugar.

  9. Variables • Dependant Variable- Daphnia’s heartbeat • Independent Variable- Artificial sugar and Raw sugar

  10. Control • Control- Daphnia’s heartbeats with water

  11. Constants • Constants- The daphnia, the amount of raw sugar used, the amount of artificial sugar used, and the time each daphnia was watched.

  12. 2 Cultures of Daphnia Magna 1 Teaspoon 1 Microscope 1 Slide Artificial Sugar “Equal” Raw Sugar “Sugar in the Raw” 3 Eyedroppers 2 Cups of water 1 Watch Materials

  13. Procedure

  14. Results

  15. Results

  16. Conclusion • To see how the daphnia’s heartbeat is affected by the artificial sugar and the raw sugar. • The Hypothesis was accepted • Possible because of the excitotoxin • Aspartame affects the brain more than the heart.

  17. Used in Real Life • To learn more about what we eat.

  18. Recommendations • Learn more about how it affects the heart • Make the project last longer

  19. Acknowledge • My parents • J.T. and Cori • Mrs. Peffley

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