1. Introduction
Bacterial polyhydroxyalkanoates (PHAs) are a unique
family of polymers that act as a carbon/energy store
for more than 300 species of Gram-positive and Gramnegative
bacteria as well as a wide range of archaea [1].
Synthesized intracellularly as insoluble cytoplasmic inclusions
in the presence of excess carbon when other essential
nutrients such as oxygen, phosphorous or nitrogen are
limited, these polymeric materials are able to be stored at
high concentrations within the cell since they do not substantially
alter its osmotic state [2]. The resulting polymers
are piezoelectric and perfectly isotactic/optically active
(having only the (R)-configuration). They are hydrophobic,
water-insoluble, inert and indefinitely stable in air, and
are also thermoplastic and/or elastomeric, non-toxic and
1. IntroductionBacterial polyhydroxyalkanoates (PHAs) are a uniquefamily of polymers that act as a carbon/energy storefor more than 300 species of Gram-positive and Gramnegativebacteria as well as a wide range of archaea [1].Synthesized intracellularly as insoluble cytoplasmic inclusionsin the presence of excess carbon when other essentialnutrients such as oxygen, phosphorous or nitrogen arelimited, these polymeric materials are able to be stored athigh concentrations within the cell since they do not substantiallyalter its osmotic state [2]. The resulting polymersare piezoelectric and perfectly isotactic/optically active(having only the (R)-configuration). They are hydrophobic,water-insoluble, inert and indefinitely stable in air, andare also thermoplastic and/or elastomeric, non-toxic and
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