Fine Structure of Cashmere and Superfine Merino Wool Fibers

1987 ◽  
Vol 57 (4) ◽  
pp. 213-219 ◽  
Author(s):  
D.H. Tester
Keyword(s):  
Fine Structure ◽  
Merino Wool ◽  
Wool Fibers

Fibrillation of the Cortex of Merino Wool Fibers by Freezing-Thawing Treatment

1984 ◽  
Vol 54 (6) ◽  
pp. 397-402 ◽  
Author(s):  
Hiraku Ito ◽  
Hiroshi Sakabe ◽  
Takeaki Miyamoto ◽  
Hiroshi Inagaki
Keyword(s):  
Merino Wool ◽  
Wool Fibers

Understanding the difference in softness of Australian Soft Rolling Skin wool and conventional Merino wool

2021 ◽  
pp. 004051752110505
Author(s):  
Hao Yu ◽  
Christopher Hurren ◽  
Xin Liu ◽  
Xungai Wang
Keyword(s):  
Fiber Diameter ◽  
Purchasing Decisions ◽  
Key Factors ◽  
Height Difference ◽  
Moisture Regain ◽  
Merino Wool ◽  
Wool Fibers ◽  
Significant Difference ◽  
The Difference ◽  
Wool Industry

Softness is one of the key elements of textile comfort and is one of the main considerations when consumers make purchasing decisions. In the wool industry, softness can reflect the quality and value of wool fibers. There is verifiable difference in subjective softness between Australian Soft Rolling Skin (SRS) wool and conventional Merino (CM) wool, yet the key factors responsible for this difference are not yet well understood. Fiber attributes, such as crimp (curvature), scale morphology, ortho-to-cortex (OtC) ratio and moisture regain, may have a significant influence on softness performance. This study has examined these key factors for both SRS and CM wool and systematically compared the difference in these factors. There was no significant difference in the crimp frequency between these two wools; however, the curvature of SRS wool was lower than that of CM wool within the same fiber diameter ranges (below 14.5 micron, 16.5–18.5 micron). This difference might be caused by the lower OtC ratio for SRS wool (approximately 0.60) than for CM wool (approximately 0.66). The crystallinity of the two wools was similar and not affected by the change in OtC ratio. SRS wool has higher moisture regain than CM wool by approximately 2.5%, which could reduce the stiffness of wool fibers. The surface morphology for SRS wool was also different from that of CM wool. The lower cuticle scale height for SRS wool resulted in its smoother surface than CM wool. This cuticle height difference was present even when they both had similar cuticle scale frequency.

Further Studies on the Microfibrils from Wool Keratin

1976 ◽  
Vol 46 (12) ◽  
pp. 870-871
Author(s):  
V. G. Kulkarni
Keyword(s):  
Electron Microscope ◽  
Chemical Compositions ◽  
Amino Acid Residues ◽  
Differential Centrifugation ◽  
Cortical Cells ◽  
Merino Wool ◽  
Wool Fibers ◽  
Tiny Amount ◽  
Helical Configuration ◽  
Wool Keratin

The chymotryptic digestion of cortical cells from Merino wool fibers separated clean microfibrils and liberated a small amount of keratinous protein called the dissolved protein. During the purification of microfibrils by a short sonication coupled with differential centrifugation, a tiny amount of globular protein, as examined under electron microscope, was also liberated. These two proteins are analyzed for their chemical compositions, which are discussed in light of the helical configuration and the preferential attack of α-chymotrypsin on the various amino acid residues in these two dispersed proteins.

Parameters of breeding traits of sheep of the new breed Artlukhsky merino

2021 ◽  
pp. 3-8
Author(s):  
H. H. Musalaev ◽  
R. A. Abdullabekov ◽  
P. M. Magomedova
Keyword(s):  
Breeding System ◽  
Final Stage ◽  
Age Groups ◽  
Live Weight ◽  
Urgent Problem ◽  
Merino Wool ◽  
Wool Fibers ◽  
The Difference ◽  
Selected Traits ◽  
The Republic

The planned breed for breeding in the Republic of Dagestan is Dagestan mountain breed. However, from sheep of this breed fine merino wool is not obtained, and the breeding of special merino breed for mountain and transhumant breeding system is an urgent problem. The purpose of the research was to characterize the main breeding traits in different sex and age groups of sheep of the new breed Artlukhsky merino, such as live weight, wool shearing and its qualitative parameters. Artlukhsky merino breed was bred by using Dagestan mountain breed on the ewes at the beginning stage of the rams of Stavropol breed, and at the final stage – Manych merino breed. The research of the parameters of the breeding traits has been made on elite and class I animals in the breeding farm of the APC “Krasny Oktyabr” in the Kazbekovsky area in the Republic of Dagestan. The live weight of sheep of different sex and age groups of the tested breed was 45–97 kg. The average fineness of wool fibers in adult rams was 23,3 microns (60 quality), in ewes – 22,9 microns (64 quality), in rams aged 12 months – 22,1 microns and young ewes – 20,9 microns (64 quality). The difference in the fineness of the wool on the side and thigh did not exceed one quality. The length of the wool fibers on the side on average in adult rams was at least 9,9 cm, in ewes – 9,4 cm, in young ewes – 10,2 cm and young rams – 10,4 cm. The yield of washed wool in the herd was at the level of 64 %, the fertility of ewes was 125 to 135 %. Thus, the indicators of the main selected traits in sheep of the new breed Artlukhsky merino are at the level of the best domestic breeds, such as Volgograd and Vyatka.

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