[medhahegde]

Brown algae (Phaeophyta)

The class phaeophyceae includes species such as Kelps (Laminaria, Macrocystis) Fucus ,Ascophyllum and Sargassum.

Alginic Acid or Alginate is a colloidal substance that is used for emulsifying, thickening, stabilizing, suspending, film-forming and gel-forming as necessary. Almost half of the alginate that is produced is utilized for making dairy products and ice-creams and the rest of it is used in various other products such as paint, rubber and also shaving creams. In textile manufacturing alginates are utilized to thicken dye pastes that are reactive to fibres and it promotes the sharpness in printed lines that conserves dyes. Dentists utilize alaginates to generate dental impressions of the teeth.

Diatoms (Bacillariophyceae)
Diatoms are unicellular microscopic algae that belong to the class Bacillariophyceae that are found in both marine and freshwater environments. Diatomite is a derivative of diatoms that is commercially important. The porous feature of the diatomaceous earth (diatomite) promotes industries to exploit this nature and utilize it as an absorbent for, noxious materials, gases, soluble fertilising agents, pasteboard, sealing wax, rubber erasers and so on. The properties of diatomite make it suitable for industrial filters. Heavier industries utilize it for stabilization and filtration of chemicals, including liquid acids and other liquid wastes. It is also utilized as filter in pharmaceuticals, serums and in various other biotechnology applications. Diatomite is also utilized in a diversity of food production applications which includes Refining sugar and sweeteners, Clarification and filtration of beer and wines, filtering fruit juices, oils and syrups. The various other significant application of diatomite can be found in area of structural materials such as sound proofing material, fire and heat resistant products, polishing substances such as Tripoli Powder, in drain pipes, porcelain materials, tiles, artificial stones and non conducting materials. The diatomite also finds its application in cosmetic products such as soap, sozodont tooth powder, toothpastes and deodorants.