BACTERIAL POLYESTERS CONTAINING BRANCHED POLY(BETA-HYDROXYALKANOATE) UNITS

被引:87
作者
FRITZSCHE, K
LENZ, RW
FULLER, RC
机构
[1] UNIV MASSACHUSETTS,DEPT POLYMER SCI & ENGN,AMHERST,MA 01003
[2] UNIV MASSACHUSETTS,DEPT BIOL,AMHERST,MA 01003
关键词
nmr spectroscopy; Polyesters; Pseudomonas oleovorans;
D O I
10.1016/0141-8130(90)90059-J
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Pseudomonas oleovorans was grown on mixtures of methyloctanoates with n-octanoate. Polymers were also obtained from organisms grown on pure 7-methyloctanoate, but not from pure 5- or 6-methyloctanoate. The polyesters obtained from 7-methyloctanoate and from its mixtures with n-octanoate contained units with the methyl branches in the pendant group, as did the copolymers from the mixtures of 5- and 6-methyloctanoate with n-octanoate. The methyl branched repeating units contained two diastereomers, and the 13-C-n.m.r. spectra of these polymers indicated that the 5-methyloctanoate units had a higher content of one of the two isomers, but not in the 6-methyloctanoate units. The weight average molecular weights of the copolyesters produced were in the range of 220 000 to 410 000, with MW/MN ratios of 1.7 to 1.9. © 1990.
引用
收藏
页码:92 / 101
页数:10
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