Experiments with Algae

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Spirulina platensis is a filametous blue-green algae (30–70 m helix diameter) (Sáncbez et al., 2003; Tomaselli, 1997). However, It have prokaryotic structure therefore they are a bacterium belong to cyanobacterium (Becker, 2006). Their cell wall contains peptidoglycan in its composition and structure, so it was classified as gram negative (Alessandro Novak, 2010). Spirulina can form population is fresh water and brackish lakes and some marine environments (Belov and Giles, 1997; Richmond, 1990). Spirulina platensis is a rich sources in protein algae of which amount to 60 – 70 percent of protein in dry cell weight (Becker, 1994) and minerals such as : iron, calcium, chlomium, copper, magnesium, phosphorus, potassium, sodium and zinc ( Belay, 1987 ) (table 1) . It has been used as human food for the last 20 years (Ciferri and Tiboni, 1985). In recent years, Spirulina also use as an animal feed supplement (Belay, et al, 1996). In addition, spirulina also contain Beta-carotene, provitamin A, Vitamin C and vitamin E (show in table 2) and has consequently it as a potential source of pharmaceuticals (Borowitzka, 1995). Nowadays, spirulina has been cultivated for studied due to its commercial importance as a source of essential fatty acid, Gamma-linolenic acid (GLA) ( Belay, 1987 ) can be used in food, feed, medicine and cosmetic industries ( BayLan, 2012). According to Mezzomo et al. (2010), the microalgae ( spirulina platensis ) can be cultivated in dilute
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