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Minerals In Domestic Wools

University of Wyoming, Laramie

Abstract

Analytical results for 50 samples of both scoured wool and dusts secured from the grease wool comprising 24 elements (mainly mineral), moisture and ash contents are reported. Grease and suint fractions from eight fleeces, tag wool from six fleeces and cortical and cuticular preparations from the top and noil fraction of two fleeces were also analyzed for these elements, except nitrogen, phosphorus, sulfur and boron. The values of moisture, ash, nitrogen, phosphorus and sulfur for the wool samples varied within rather narrow limits. However, wide variations existed between the individual fleece values for the other elements. Copper, cobalt, molybdenum, silver and zinc were found in higher concentration in the wool than in the associated dust. Cobalt was found in detectable amounts in only five fleeces, while molybdenum was detected in only nine fleeces.

The results indicate the complexities of mineral metabolism of the sheep as indicated in the chemical elements of the fleece and its component parts.

¹ Respectively, Head of the Wool Section; Professor of Wool; Associate Professor of Agriculture Biochemistry; Head, Division of Agricultural Biochemistry; Assistant Director; and Director of the Natural Resources Research Institute.

² Research conducted under contract to the U. S. Department of Agriculture and authorized by the Research and Marketing Act of 1946. The Contract was supervised by the Wool and Mohair Laboratory, Western Utilization Research and Development Division, Agricultural Research Service.

³ The authors gratefully acknowledge the assistance of L. C. Parker, J. W. Oxley, H. F. Eppson, C. S. Gilbert, W. W. Ellis, P. G. Rand, S. M. Norman, C. H. Trimble and E. A. Hunter of the University of Wyoming, and W. H. Ward and J. J. Bartulovich of the Western Regional Research Laboratory and of the U. S. Department of Agriculture at Albany, California who carried out the analyses and preparations reported herein.