Abstract: GC/MS Study on N-Alkanes, Alkenes and Bicyclic Terpanes of Botryococcus braunii with Different Growing PeriodsSong Yitao;Li Shuqing(Institute of Geoscience of Shengli PetroleumAdministration, Dongying 257015, Shangdong, China)Received 1994-07-20Abstract:Having studied the chlorofom exatracts of Botryococcus braunii which produced inAmerica and France with different growing periods, the authors find two kinds of Botryococcus braunii, which had the same growing periods, had same N-alkanes, alkenes andbicyclic terpanes, and for the first time have determined C14, C15, C16 bicyclic terpane.This shows Botryococcus braunii is one of the original matter source of some bicyclic terpanes in the geologic body. In the growing process of Botryococcus braunii, with the increase of growing time the alkenes were gradually changed into the alkanes, the contentof alkenes was decreased, the content of N-alkanes with low carbon numbers was increased, and the structrues of bicyclic terpanes were changed too. This kind of self-mature and change of Botryococcus blaunii makes its hydrocarbon component more near tothat of petroleum.Keywords: Botryococcus braunii, growing peroid, N-alkane, alkene, bicyclic terpane,GC/MS