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Contents
- Page 1
What are surfaces and membranes ?
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- Page 2
Types and shapes of surfaces and membranes
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- Page 3
Soap
- Description of a simple experiment:
An experiment with soap and oil and water. What does the soap
do and why? How are the molecules arranged?
- Page 4
Soap molecules: love and hate
- Amphiphilic properties of surfactant molecules (sketches).
ESSAY: Amphiphiles as surfactants
- Page 5
Complex arrangements of amphiphilic molecules
- Pictures of some complex amphiphile structures
- Page 6
Amphiphilic molecules in water
- How do the amphiphilic molecules (soaps for example)
form membranes? Simple sketches of micelles and bilayers.
- Page 7
What determines the shape?
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- Page 8
Energy of a membrane
- Where does the energy come from to make a balloon go bang? (sketches)
- Page 9
Stretching energy
- APPLET: Spring extension applet.
- Page 10
Stretching an amphiphilic bilayer
- Simple sketch.
- Page 11
Bending energy
- We try to link energy to effort and the bending of a membrane to
the bending of objects such as bamboo sticks.
- Page 12
The human red blood cell
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- Page 13
What shape is a red blood cell?
- APPLET: 3D model of red blood cell
How big is a red blood cell?
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Scaffolding and the red blood cell
- Diagram of cytoskeleton.
- Page 15
Another look at cell membranes
- APPLET: Visualization of an amphiphilic bilayer with random motion.
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Food, energy and life
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- Page 17
Two types of membrane: fluid and tethered
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- Page 18
What do random surfaces have to do with space and time?
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What do membranes have to do with space and time?
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- Page 20
Simulating membranes with supercomputers
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- Page 21
Summary
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Membranes ]
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