COTTON Flashcards
What is the botanical name of cotton
Gossypium barbadense L. Malvaceae
Synonym of cotton
Leonia gossypium(Tul.) Byng & Christenh
Family of Violaceae
Description of cotton
The soft fluffy staple fibre that grows in a boll or protective capsule around the seeds ( they are the epidermal trichomes of the seeds i.e raw cotton) of the cotton plant, which may be shrubs or trees
Preparation of cotton
Collection of the cotton
Separation of the trichomes
Mass of trichomes
Constituents
Types of cotton
Staples(longer fibres at the first ginning)
Linters(shorter fibres at the second ginning of lower quality)
What is the botanical purpose of cotton fibre
To aid in seed dispersal
Distribution of cotton
America, Africa, india
Greatest diversity of wild cotton
Mexico>Australia>Africa
Cotton is mainly prepared from
Card strips, linters, card fly, comber waste
Cottons from which regions are preferred
American and Egyptian cotton
Characteristics of the preferred cotton having average staple as specified by the BP
Long
Resistance
Reduced dust when shaken gently
Physical properties of cotton
Flammable
Natural colors like white brown and green or mixture
Bleached cotton yarn and absorbent cotton wool are readily wetted by water
Chemical constituents of cotton
Cellulose 90per
Moisture 7per
Wax, fat, remains of protoplasm and ash
Cellulose bond
Microscopy of cotton
Based on
Nature
It has unicellular hairs, that are like empty and twisted fire hoses
Development
Young cylindrical
Mature. Flattened and twisted
Cell wall
Cellulose
Coated with waxy cuticle, making it non absorbent
Staining
Ruthenium red
Pharmaceutical uses of cotton
Cotton root bark as abortifacient
Linters(absorbent cotton) as surgical dressings
Filter medium and insulating material
