1 The colour of the yolk does not affect the egg nutritional value. 2  Chalazea (chuh-LAY-zee): A pair of spiral bands that anchor the yolk in the centre of the thick albumen. 3  The fresher the egg, the more prominent the chalazae. 4  Germinal Disk: Appears as a slight depression on the surface of the yolk.
Bleaching agents. General info. The purpose of bleaching agents is to bleach the natural substances in cotton fibres and cellulose fibres that make the fabric yellowish and to bleach spots that are not removed by the laundering process.Bleaching agents also bleach textile colours and hence should be avoided for coloured textiles.eneral info. The purpose of bleaching agents is to bleach the natural substances in cotton fibres and cellulose fibres that make the fabric yellowish and to bleach spots that are not removed by the laundering process.
bleaching - Student Encyclopedia (Ages 11 and up) The process of whitening a substance by removing its natural coloring matter is called bleaching. Some bleaching is done in the home, but the main use of bleach is in industry. Fibers, cloth, paper pulp, sugar, and flour are often bleached during manufacture. In the home, bleach added to laundry water helps to remove dirt and restore whiteness or brightness to fabrics.