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What are the risk factors for cardiovascular disease?

What are the risk factors for cardiovascular disease?. Vitamin C. connective tissue bones teeth skin internal endothelial surfaces. Arteriosclerosis. Which foods contain Vitamin C?. By the end of the lesson you should be able to:.

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What are the risk factors for cardiovascular disease?

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  1. What are the risk factors for cardiovascular disease?

  2. Vitamin C • connective tissue • bones • teeth • skin • internal endothelial surfaces

  3. Arteriosclerosis

  4. Which foods contain Vitamin C?

  5. By the end of the lesson you should be able to: • describe how to investigate the vitamin C content of food and drink. (D/E) • calculate the % concentration of Vitamin C for various fruit based drinks. (B/C) • explain why vitamin C is needed by humans with specific reference to CVD (A)

  6. Practical investigation Determination of the concentration of vitamin C by using DCPIP test

  7. DCPIP = Dichlorophenol-indophenol

  8. Carton Orange Juice Freshly squeezed orange juice Orange Squash Lemon Juice

  9. Pink Colourless Blue A few steps in titration Juice titrates against DCPIP solution DCPIP solution changes to pink colour DCPIP solution changes to colourless

  10. Precaution: Drop size must be constant. Press the squeezing syringe gently.

  11. During determination, the dropper must be held vertical and the fruit juice should not flow down the side of the test tube.

  12. At least three experimental trials must be taken and the average number of drops calculated.

  13. 20 drops of juice B is required 15 drops of juice A is required Question: To decolourize the DCPIP solution Which one gets more vitamin C in it ? Answer: juice A

  14. How to work out the concentration of vitamin C in different juices? Concentration of vitamin C in fruit juice Volume of standard solution Volume of fresh juice Concentration of standard solution X

  15. By the end of the lesson you should be able to: • describe how to investigate the vitamin C content of food and drink. (D/E) • calculate the % concentration of Vitamin C for various fruit based drinks. (B/C) • explain why vitamin C is needed by humans with specific reference to CVD (A)

  16. Homework • You will need to write this experiment up at home. • Use the QIS Biology department website: • qisbiology.edublogs.org • Then email your report to me at: • strachanm@qis.org

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