ArticleScientific reports2026
Amino acids and mineral composition of normal and felted wool of the ukrainian carpathian mountain sheep breed.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The felting of wool directly on the sheep largely affects its value as a raw material for the textile industry. In this regard, the aim of this study was to investigate the amino acid and mineral composition of wool affected by this defect in sheep of the Ukrainian Carpathian Mountain breed. Experimental wool samples were divided into guard and down fibers. The amino acid composition was determined using an AAA-400 amino acid analyzer, the mineral composition was determined using an atomic absorption spectrophotometer (Thermo Scientific iCE 3500), and sulfur was determined by the nephelometric method based on the turbidity of a barium sulfate suspension stabilized with glycerin. It has been shown that the process of wool felting is accompanied by partial degradation of fibers resulting from the destruction of disulfide, ionic, and hydrogen bonds, as indicated by a significant decrease in the total amino acid content, due to reductions in aspartic (P < 0.01) and glutamic (P < 0.01) acids, arginine (P < 0.05), as well as cystine (P < 0.01) and histidine (P < 0.05) in down fibers, and lysine (P < 0.01) in guard fibers. The observed decrease in calcium and copper content in felted wool indicates a disruption of ionic interactions with the functional groups of amino acids, which play a key role in stabilizing the structural organization of wool fibers, while the decrease in sulfur content in down fibers confirms the destruction of disulfide bonds. Therefore, the results of the study indicate that wool felting is the result of biochemical processes leading to disruption of the keratin structure of the fiber. In the future, the obtained data may be used to develop comprehensive approaches aimed at preventing and eliminating this wool defect.
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