| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for separating polyhydroxyalkanoate ("PHA") from a plant such as transgenic oil crop plant. SOLUTION: In order to isolate PHA, in an embodiment, a biomass derived from an oil crop plant is pre-processed, for example, by grinding, crushing or rolling. Then, the oil is extracted from the biomass with the first solvent in which the oil is soluble and the PHA is not highly soluble and the oil is removed. The biomass then can be extracted with the second solvent in which the PHA is soluble, to separate the PHA from the biomass. Alternatively, the PHA-containing biomass is treated with a chemical or biochemical agent, such as an enzyme, to chemically transform the PHA into a PHA derivative. The PHA derivative then is separated from the mixture using, for example, a physical separation process such as distillation, extraction or chromatography. COPYRIGHT: (C)2008,JPO&INPIT
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