Table of Contents

• Prequiz...
• Just Plain Movement
• 1: Measuring movement
• 2: Directed vs. undirected movement
• 3: Measuring movement using flux
• Introducing Gradients
• 4: Gradients and diffusion
• 5: Watching diffusion happen (applet)
• 6: Visualising the Gradient
• Fick's Laws, Part I
• 7: Fick's First Law
• 8: The gradient in Fick's First Law
• 9: A familiar equation for Fick's First Law
• 10: Graphing Fick's First Law
• 11: How does flux depend on distance?
• 12: A fragrant example
• 13: General transport equations and Fick's First Law
• Review
• 14: Summary

Measuring movement

Learning Outcomes

After completing this module you should be able to:

• Explain the linear relationship between the rate of movement of a substance and its concentration gradient (Fick’s First Law).
• Measure the rate of movement of a substance from one area to another as a function of the concentration gradient and the diffusion coefficient of that substance in the medium.

 

	vs.
Directed		Undirected

 

Clipart for this module thanks to Arthur's Clipart, FreeImages.co.uk, Clipart Heaven