Abstract
Algaenans are non-hydrolysable biopolymers present
in the cell walls of specific freshwater and marine
microalgae. As a consequence of their high resistance
algaenans are selectively preserved upon sedimentation
and burial in the sediments. Upon chemical
analysis of algaenan isolated from some green
microalgae it was shown that most algaenans share
the same chemical features i. e. highly
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