Dunaliella salina is a halophilic green microalgae belonging to the group of green algae, commonly found in sea salt fields. Due to its unique color, the lake will be dyed red or pink. In the lake of Retba, 35 km north of the capital of Senegal in West Africa, the lake is dyed into a unique pink color due to the action of Dunaliella algae, giving it the nickname "Pink Lake".
In 1831, the French biologist Dunal inadvertently discovered that some salt ponds on the Mediterranean coast had a red single-celled algae with double flagella in the tail. In order to commemorate his discovery, he later named it "Dalian algae", referred to as "Du's salt algae", English name: Dunaliella salina. Because of its lack of cell wall, it is different from other diflagellate unicellular algae, so it was established as a new genus Dunaliella.
Dunaliella salina is a single-celled phytoplankton. Its algae are oval, elliptical or pear-shaped, 18-28μm long and 9.5-14μm wide. The body shape changes during exercise, in different salinities, light, temperature, etc. Its shape changes greatly under the environment. This is because Dunaliella has no cell wall and its shape changes with the environment. The protein core and starch granules also vary with the environment.
And there are changes. The anterior segment of Dunaliella algae is generally concave, with two equal-length flagella in the depression. The flagella is about 1/3 longer than the cell. The algae has a cup-like pigment body. The pigments in the pigment body are mainly chlorophyll and carotenoids. Beta-carotene is the main).
The value of Dunaliella salina is mainly as follows:
1. Edible value: rich in oils, β-carotene, protein, polysaccharides, etc., and contains high minerals such as Ca, P, Zn, etc., also contains 18 kinds of amino acids including human essential amino acids, accumulated glycerin It is 40%-50% of dry weight. Under appropriate conditions, the in vivo synthesized beta-carotene can reach 10% of the dry weight of the cells.
2. Economic value Dunaliella salina has unique economic value in food, medicine and health care, and chemical and aquaculture. This algae has achieved industrial production in countries such as Australia, the United States and Israel. The main aspects of its industrialization are β-carotene health products, cosmetics, nutritional supplements and algal flour.
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