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    Micro algae represent an exceptionally diverse but highly specialized group of micro-organisms adapted to various ecological habitats. Many micro algae have the ability to produce substantial amounts (e.g. 20–50% dry cell weight) of triacylglycerols (TAG) as a storage lipid under photo-oxidative stress or other adverse environmental conditions. Some of the algal species studied for the bio-diesel production dependent on their oil content and quality of oil they produce are listed in the table.

                                                Oil content of some Microalgae

Microalgae

Oil content (% dry wt)

Botryococcus braunii

25–75

Chlorella sp

28–32

Crypthecodinium cohnii

20

Cylindrotheca sp.

16–37

Dunaliella primolecta

23

Isochrysis sp.

25–33

Monallanthus salina

N20

Nannochloris sp.

20–35

Nannochloropsis sp.

31–68

Neochloris oleoabundans

35–54

Nitzschia sp

45–47

Phaeodactylum tricornutum

20–30

Tetraselmis sueica

15–23

 

 
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