By N. S. Kaplan
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Extra info for A Practical Guide to Fibre Science
Processing of Textile Fibres 39 Fibre maturity Fibre maturity is another important characteristic of cotton and is an index of the extent of development of the fibres. As is the case with other fibre properties, the maturity of cotton fibres varies not only between fibres of different samples but also between fibres of the same seed. The causes for the differences observed in maturity, is due to variations in the degree of the secondary thickening or deposition of cellulose in a fibre. A cotton fibre consists of a cuticle, a primary layer and secondary layers of cellulose surrounding the lumen or central canal.
Changes in length, strength, uniformity, and fineness In one recent analysis, fiber perimeter was shown to be the single quantitative trait of the fiber that affects all other traits. Fiber perimeter is the variable that has the greatest affect on fiber elongation and strength properties. While mature dead fibers have an elliptical morphology, living fibers have a cylindrical morphology during growth and development. Geometrically, perimeter is directly determined by diameter (perimeter = diameter x p).
They are given below: honey dew - secretions fungus and bacteria - decomposition products vegetable substances - sugars from plant juices, leaf nectar, overprodcution of wax, fats, oils - seed oil from ginning pathogens synthetic substances - defoliants, insecticides, fertilizers, oil from harvesting machines In the great majority of cases, the substance is one of a group of sugars of the most variable composition, primarily but not exclusively, fructose, glucose, saccharose, melezitose, as found, for example on sudan cotton.
A Practical Guide to Fibre Science by N. S. Kaplan