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By focusing on a range of fractions of medium-chain-length polyhydroxyalkanoates (mcl-PHA), a more in-depth understanding of the thermal properties and the crystalline structure has been gained. Dual-mode melting was observed for all the fractionated samples. Further DSC analysis revealed that such phenomenon was due to the presence of two crystalline phases (phase I and phase II), forming at different...
Enzymatic degradation of poly(3-hydroxybutyrate-co-3-hydroxyalkanoates) (PHBA) biopolyester consisting of 3-hydroxybutyrate (HB) and 15mol% medium-chain-length 3-hydroxyalkanoates (HA) was studied using a polyhydroxyalkanoates (PHA) depolymerase produced by Ralstonia pickettii T1. It was found that PHBA films did not lose their weight after 25h of depolymerase treatment. In contrast, three commercially...
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