The Animal Biology

COMPARATIVE CHARACTERISTICS OF INTERNAL LIPIDS IN WOOL FIBRES  OF DIFFERENT TYPES

V. M. Tkachuk¹, V. V. Havrylyak¹, P. V. Stapay¹, H. M. Sedilo²

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¹Institute of Animal Biology NAAS, V. Stus str., 38, Lviv, 79034, Ukraine

²Institute of Agriculture of Carpathian region, Hrushevskoho str.,

Obroshyno village, Lviv region, 81115, Ukraine

The paper presents the investigation of the content and composition of internal lipids and protein fractions — keratoses in the different types of wool fibers. These data may be some of interest to the textile industry. For experiment the samples of fibers from Askanian fine-fleece, Askanian crossbred and Carpathian Mountain ewes were used. Semi-course fibers of Carpathian Mountain ewes also were divided into fuzz and guard hair.

It was established that different wool fibers contain various amounts of structural lipids: free internal lipid fraction are rising with increasing of the fiber diameter and opposite dependence for covalently bound lipids is observed. In general, the total content of free and bound lipids in the different fibers is almost identical: thin fuzz contains 2.6 %, and fine, crossbred and semi-course wool — 2.65 %, 2.60 % and 2.85% respectively.

The differences in the structural lipids content are associated with the fiber structure in particular α-, β-, γ-keratoses. The largest amount of β-keratose in semi-coarse wool can be associated with the highest content of nonidentified lipids, which are not found in the free fraction of structural lipids.

A correlation analysis between the content and composition of structural lipids and protein fractions wool fibers was performed.

It was found a direct relationship between the content of free lipid fraction and fiber diameter (r=0.996; 0.887; 0.698; 0.746, respectively, for fuzz, thin, crossbred and semi-course wool). The inverse relationship for covalently bound lipids were observed (r=–0.993; –0.995; –0,737; –0.694).

Keywords: WOOL FIBER, DIAMETER, FREE AND BOUND INTERNAL LIPIDS, α-, β- γ-KERATOSES, CORRELATION

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