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.
Bleach is a chemical that whitens clothing. The bleaching process has been known for millennia, but the chemicals currently used for bleaching resulted from the work of several 18th century scientists.