2004: Thickness, medullation
and growth rate of female scalp hair are subject to significant variation according to pigmentation and scalp location during ageing.
The wool quality in terms of staple length (cm), fibre diameter ([micro]m) and total medullation (%) was found to be comparable in lambs irrespective of dietary treatments (Table 4).
The CT supplementation in the present study had no significant effect on wool quality in terms of staple length (cm), fibre diameter (gm) and total medullation (%) similar to the earlier reports , however, contrary to some reports describing beneficial effect of CT on these parameters in grazing sheep [23,42].
A sonic digitizing technique for measuring medullation
In manual microscopic methods we determined the medullary pattern, hair width and medulla width to identify the prey species in scats, while average fiber diameter, diameter distribution and percent medullation was measured by OFDA.
Keywords: Hair fibre diameter, medullation, scat of carnivore.
These hairs are characterized by decreased pigment near the root, lack of medullation
near the root, and increased cortical fusi near the root (Petraco 1988).
. Experimental Endocrinology Academic Press, New York.
British breeds have coarse fleeces similar to that of Iranian sheep breeds in terms of fibre diameter, overall level of medullation and fleece structure.
The coarseness and fleece structure of Iranian carpet wool breeds is not due to primary follicle density but rather secondary follicle density which in turn causes lower fibre diameter, decreased level of medullation or variability in the fibre length and diameter within the staple.
Age changes in head hair from birth to maturity: Medullation
in hair of children, American Journal of Physical Anthropology (1950) 8:399-415.
Genetic basis of human hair medullation
, Human Heredity (1997) 27:381-382.