Sulphur Content of the Intercellular Phase of the Wool Fibre

Nature ◽  
1938 ◽  
Vol 141 (3559) ◽  
pp. 118-119 ◽  
Author(s):  
J. B. SPEAKMAN ◽  
P. R. MCMAHON
Keyword(s):  
Sulphur Content ◽  
Wool Fibre

scholarly journals The Bilateral Structure of Wool Cortex and Its Relation to Crimp

1955 ◽  
Vol 8 (2) ◽  
pp. 288 ◽  
Author(s):  
RDB Fraser ◽  
GE Rogers
Keyword(s):  
Cross Sections ◽  
Chemical Properties ◽  
Sulphur Content ◽  
Wool Fibre ◽  
Physical And Chemical Properties ◽  
Cortical Cells ◽  
Basic Dyes ◽  
The Difference ◽  
Physical And Chemical ◽  
And Chemical Properties

Xew evidence of the nature of the bilateral cortex in crimped wool is presented and discussed in relation to the physical and chemical properties of the wool fibre. The origin of the asymmetry in the cortex was studied by cutting cross sections of sheep skin and swelling plucked wool roots. It is shown that the bilateral structure is present before the cortex is keratinized and does not originate from an asymmetrical keratinization as has been suggested. Coarse wools, in which crimp is much less, are shown to possess a radial asymmetry in which the peripheral cortical cells are less accessible to basic dyes and have a higher sulphur content than the central cells. This is related to the difference between the curved follicles from which fine fibres are produced and the straighter follicles producing coarse fibres.

scholarly journals Ultra-High-Sulphur Proteins in the Hairs of the Artiodactyla

1972 ◽  
Vol 25 (1) ◽  
pp. 139 ◽  
Author(s):  
JM Gillespie ◽  
Andrea Broad
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Linear Relation ◽  
Sulphur Content ◽  
Wool Fibre ◽  
Amino Acid Residues

Wool follicles are potentially able to synthesize specific high.sulphur proteins in which about 30% of the amino acid residues are half-cystine (Gillespie and Reis 1966). The amount of these proteins incorporated into the fibre is related to the availability of sulphur-containing amino acids for metabolism in the sheep. There is a linear relation between the sulphur content of a wool fibre and its content of these proteins (Broad, Gillespie, and Reis 1970).

Dynamic action of keratinase on wool fibre tracked by FITC-labelled enzyme

2020 ◽  
pp. 1-9
Author(s):  
Zhang-Jun Cao ◽  
Xiao-Xiao Song ◽  
Qian Zhu ◽  
Juan Wang ◽  
Run Gong ◽  
...  
Keyword(s):  
Wool Fibre ◽  
Dynamic Action

scholarly journals Effects of Water and Chemical Solutions Ageing on the Physical, Mechanical, Thermal and Flammability Properties of Natural Fibre-Reinforced Thermoplastic Composites

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4581
Author(s):  
Baljinder K. Kandola ◽  
S. Ilker Mistik ◽  
Wiwat Pornwannachai ◽  
A. Richard Horrocks
Keyword(s):  
Salt Water ◽  
Flexural Modulus ◽  
Moisture Sorption ◽  
Natural Fibre ◽  
Thermoplastic Composites ◽  
Wool Fibre ◽  
Poly Lactic Acid ◽  
Natural Polymers ◽  
Chemical Solutions ◽  
Pp Composites

Biocomposites comprising a combination of natural fibres and bio-based polymers are good alternatives to those produced from synthetic components in terms of sustainability and environmental issues. However, it is well known that water or aqueous chemical solutions affect natural polymers/fibres more than the respective synthetic components. In this study the effects of water, salt water, acidic and alkali solutions ageing on water uptake, mechanical properties and flammability of natural fibre-reinforced polypropylene (PP) and poly(lactic acid) (PLA) composites were compared. Jute, sisal and wool fibre- reinforced PP and PLA composites were prepared using a novel, patented nonwoven technology followed by the hot press method. The prepared composites were aged in water and chemical solutions for up to 3 week periods. Water absorption, flexural properties and the thermal and flammability performances of the composites were investigated before and after ageing each process. The effect of post-ageing drying on the retention of mechanical and flammability properties has also been studied. A linear relationship between irreversible flexural modulus reduction and water adsorption/desorption was observed. The aqueous chemical solutions caused further but minor effects in terms of moisture sorption and flexural modulus changes. PLA composites were affected more than the respective PP composites, because of their hydrolytic sensitivity. From thermal analytical results, these changes in PP composites could be attributed to ageing effects on fibres, whereas in PLA composite changes related to both those of fibres present and of the polymer. Ageing however, had no adverse effect on the flammability of the composites.

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