COMPARATIVE CHARACTERISTICS OF MACROSTRUCTURE, CHEMICAL COMPOSITION AND PHYSICAL PROPERTIES OF SHEEP WOOL OF DIFFERENT BREEDS
V. M. Tkachuk, P. V. Stapay
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Institute of Animal Biology NAAS, st. Vasyl Stus, 38, Lviv, 79034, Ukraine
The data about the macrostructure, chemical composition and physical properties of wool of different breeds sheep, such as thin fibers of Askanian fine fleece, Prekos breed and coarse hair and fuzz of Ukrainian Carpathian Mountain ewes. It was found that cuticle of coarse hair is the biggest, as evidenced by the highest content in these fibers beta keratoses — 15.1 %. In fine wool of Askanian fine fleece and Precos ewes the content of beta keratoses is almost identical (12.9 and 11.5 % respectively) and fuzz fibers are characterized by the smallest amount of this protein — 10.2 % (P<0.001). The content of alpha- and gamma-keratoses in these fibers was no significant differences.
It has been shown that the fuzz of Ukrainian Carpathian Mountain ewes and thin fibers of Precos ewes are characterized by the highest content of sulfur and cystine (2.9 and 2.9, and 11.2 and 11.5 %, respectively), while in coarse fibers of Ukrainian Carpathian Mountain ewes their amount is much lower and is — 2.7 and 9.0 %, respectively. The coarse hair of Ukrainian Carpathian Mountain ewes is characterized by the highest strength (9.1 cN/tex) and thickness (48.8 m), the finest fibers are fuzz (16.9 mm) and they are characterized by the lowest strength (7,0 cN/tex). The thickness of wool of Askanian fine fleece and Precos ewes is intermediate (20.4 and 20.8 mm respectively) compared to coarse hair and fuzz. The strength of these fibers is 8.2 and 7.1 cN/tex.
Keywords: WOOL, EWES, KERATOSES, SULFUR, CYSTINE, THICKNESS, STRENGTH
