Method for producing a microbial polyester
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsMinoru Akiyama, Yoshiharu Doi
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Abstract
An improved method for producing a microbial polyester comprising 3-hydroxybutyrate monomer units is disclosed, in which a strain belonging to the genus Alcaligenes is cultured in a liquid medium containing a carbon source selected from specific long chain fatty acids and derivatives thereof. The produced microbial polyester is useful in plastics and polymers which are free from environmental pollution problems, and in implanting materials and drug carriers, recovery of which is not necessary.
Claims7
A method for producing a microbial polyester comprising D-(-)-3-hydroxybutyrate monomer units, which comprises the steps of:
- (1) providing a liquid medium containing at least one essential carbon source selected from the group consisting of fatty acids each having 10 to 22 carbon atoms and derivatives thereof;
- (2) culturing a strain belonging to the species Alcaligenes lipolytica, said strain producing a microbial polyester comprising D-(-)-3-hydroxybutyrate monomer units and being negative to both a nitrate reduction and a denitrification reaction, in said liquid medium, thereby obtaining a cultured broth containing a microbial polyester comprising D-(-)-3-hydroxybutyrate monomer units;
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- (3) isolating said microbial polyester from said cultured broth.
Dependencies are inferred from the claim text.