Page 356 - Fiber Fracture
P. 356
338 J.W.S. Hearle
epicuticle
a
right- handed
handed coiled-coil
a-helix rope micGfibril macrofibril para cell ortho cel!,
V
cortex
I I I I I I
1 2 7 200 2000 20000 nm
Filament
b C
cortical
celis
Matrix
Fig. 5. (a) The structure of wool, reproduced by permission of Robert C. Marshall of CSIRO. (b) The
two-phase composite model (Postle et al., 1988). (c) A schematic model of the cell structure of wool (Anon.,
1986).
