The migration of sebum and suint components along wool fibres of Merino sheep

Author:

Hay JB,Mills SC

Abstract

It has been shown that isotopically labelled sheep wool wax is carried passively along the wool fibre as a band by growth of the wool, and that it does not flow along the fibre to any large extent during experiments of several months. This supports the view that the function of sebum, in mammals in general, is to protect the hair (wool) fibre and the condition of the coat, and contrasts with the reported rapid spread of sebum over the human skin surface. It also seems unlikely that wax lost from the fleece during exposure to rainfall is replenished with sebum freshly secreted onto the surface, since sebum does not migrate. Two methods were used to obtain labelled wax, direct application of labelled cholesterol to the skin surface and intradermal injection of labelled sebum substrate. Prior washing of the wool with detergent showed that wax already on the fibre was not the cause of the observed lack of flow of newly formed wax. Isotopically labelled suint components were also carried passively by wool growth. It is unlikely that wax is transported to any extent by suint in the wool; this is in contrast to the suggested role of sweat in facilitating the spread of sebum over the human skin surface. Some spreading of radioactive wax and suint bands was noted however, possibly because of diffusion and mechanical disturbance of the wool.

Publisher

CSIRO Publishing

Subject

General Agricultural and Biological Sciences

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Wool metrology research and development to date;Textile Progress;2015-07-03

2. Trace Metals in Fleece Wool and Correlations with Yellowness;Biological Trace Element Research;2013-01-06

3. Aspects of the photochemistry of wool yolk (wool wax and suint);Review of Progress in Coloration and Related Topics;1997-06

4. Mineral and amino acid composition of wool from New Zealand Merino sheep differing in susceptibility to yellowing;Australian Journal of Agricultural Research;1994

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