Binary mix metal mordant dyeing of merino wool fibers using Cinnamomum camphora waste/fallen leaves extract: a brief statistical analysis of color parameters

2020 ◽  
pp. 1-10
Author(s):  
Luqman Jameel Rather ◽  
Qaiser Farooq Dar ◽  
Qi Zhou ◽  
Long Haofan ◽  
Qing Li
Keyword(s):  
Statistical Analysis ◽  
Cinnamomum Camphora ◽  
Color Parameters ◽  
Merino Wool ◽  
Wool Fibers ◽  
Fallen Leaves ◽  
Mordant Dyeing

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.

Effect of Lithium Disilicate Ceramic Thickness on the Color of Discromic Substate

2014 ◽  
Vol 614 ◽  
pp. 95-99
Author(s):  
Alexandra Botos ◽  
Cristina Gasparik ◽  
Horatiu Colosi ◽  
Mandra Badea ◽  
Diana Dudea
Keyword(s):  
Composite Material ◽  
Statistical Analysis ◽  
Sucrose Solution ◽  
Lithium Disilicate ◽  
Color Difference ◽  
Ceramic Layer ◽  
Color Parameters ◽  
Die Material ◽  
Ceramic Thickness ◽  
Ceramic Restorations

The aim of this study was to evaluate the influence of the thickness of lithium disilicate ceramics (medium opacity) on the color perception of pressed full-ceramic restorations, in various situations of discromic substrate. The color parameters of ceramic disks (10 mm diameter, thickness 0.3, 0.6, 0.9, 1.2, 1.5mm), (n=5), of IPS e.max® Press MO 0 (Ivoclar Vivadent) were evaluated upon samples of light cured composite material that simulate the shade of prepared teeth (IPS Natural Die Material Kit, Ivoclar Vivadent) (disks 10mm diameter, 5mm thickness). Saturated sucrose solution was interposed between the ceramic disks and the composite disks. The color parameters CIE L*, a*, b* were recorded by using a spectrophotometer (VITA Easyshade® Advance, VITA Bad Säckingen, Germany). The color difference E was calculated. Statistical analysis of the data revealed that the increase in thickness of the ceramic layer will lead to an increased masking of the discolored background by the ceramic layer.

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