Kappaphycus alvarezii gelling, thickening, and stabilizing agents, especially in food products such as frozen desserts, chocolate milk, cottage cheese, whipped cream, instant products, yogurt, jellies, pet foods, and sauces. Aside from these functions, carrageenans are used in pharmaceutical formulations, cosmetics, and industrial applications such as mining. Carrageenan is extracted from this seaweed in two ways. In native extraction, the seaweed is made into an aqueous solution, and the residue is filtered, leaving nearly pure carrageenan. The alkaline-modified method is less expensive and easier. The seaweed is mixed in an alkali solution, leaving a mixture of carrageenan and cellulose that can be sold
Shades of purple art and history the section "In prehistory and the ancient world: Tyrian purple" " "Tyrian purple" is the contemporary English name of the color that in Latin is denominated ""purpura"". Other contemporary English names for "purpura" are "imperial purple" and "royal purple". The English name "purple" itself originally denominated the specific color "purpura". "Purpura" is the color of a dye extracted from a mollusk found on the shores of the city of Tyre in ancient Phoenicia (contemporarily in Lebanon), which color in classical antiquity was a symbol of royalty and political authority because only the very wealthy could afford it,