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.
A bleach is a chemical that can remove or lighten color, usually via oxidation. Learn about the different types of bleaches and how they work. A bleach is a chemical that can remove or lighten color, usually via oxidation. Types of Bleach. There are several types of bleach. Chlorine bleach usually contains sodium hypochlorite. Oxygen bleach contains hydrogen peroxide or a peroxide-releasing compound such as sodium perborate or sodium percarbonate. Bleaching powder is calcium hypochlorite.