Effects of nitrogen sources on the growth, contents of total lipids and total hydrocarbons of Botryococcus braunii Advances in molecular ecology of the oil-rich microalga Botryococcus braunii Research progress on energy microalga Botryococcus braunii Effects of different culture medium on two Botryococcus braunii Effects of Carbon,Nitrogen,and Phosphorus Concentration in Eutrophic Wastewater on Total Lipids and Total Hydrocarbons of Botryococcus braunii The Effects of Several Environmental Factors on the Photosynthesis of Botryococcus braunii