Novel biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) [PHBV]/graphene nanocomposites were prepared by solution casting. The thermal properties, crystallization behavior, microstructure, and fracture morphology of the composites were investigated. Scanning electron microscope (SEM) results show that graphene layers are homogeneously dispersed in the polymer matrix. X-ray diffraction (...

BACKGROUND The halophilic archaeon Haloferax mediterranei is able to accumulate large amounts of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) with high molar fraction of 3-hydroxyvalerate (3HV) from unrelated carbon sources. A Polyhydroxyalkanoate (PHA) synthase composed of two subunits, PhaCHme and PhaEHme, has been identified in this strain, and shown to account for the PHBV biosynthes...

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is one of the most attracting biopolymers, nevertheless, its expensiveness has hampered uses in daily applications. In this framework, Coffee Silverskin (CS), an agricultural residue, been embedded variable amounts into a PHBV matrix plasticized by acetyl tributyl citrate (ATBC) to achieve biocomposite system through melt extrusion technique. ...

Uncontrollable displacements that greatly affect the concentration of active agents at the target tissues are among a major limitation of the use of microparticulate drug delivery systems (DDS). Under this context a biphasic injectable DDS combining poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) microparticles (MPs) and a gellan gum (GG) injectable hydrogel is herein proposed for the localized...

Electrospinning of fibrous tissue engineering scaffolds has been traditionally conducted using positive voltages. In the current study, positive voltage (PV) electrospinning and negative voltage (NV) electrospinning were investigated for forming fibrous membranes of poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV). In both PV-electrospinning and NV-electrospinning, the fiber diameter generally i...

(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) obtained from waste/wastewater using a mixed microbial culture (MMC) usually varies in its properties due to daily variation the composition applied as feedstock. In current study, average molecular weight (MW) of PHBV was purposely reduced about 1 MDa 200 kDa by drying PHBV-rich biomass at elevated temperature 120 °C for 18 h ease extraction and ...

Crotonic acid (CA) and trans-2-pentenoic (2-PA) can be obtained from renewable resources by pyrolysis of the bio-based poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) copolymer. In this study, direct PHBV-enriched biomass into CA 2-PA was studied under an inert atmosphere N2 carrier gas flow, aiming at obtaining high yields mixed microbial cultures (MMCs). The highest 80 ± 2% for 67 1% were...

The objective of this work was to investigate the application of supercritical carbon dioxide as antisolvent for the co-precipitation of -carotene and poly(hydroxybutirate-co-hydroxyvalerate) (PHBV) with dichloromethane as organic solvent. For this purpose, the concentrations of -carotene (1 to 8 mg.cm) and PHBV (20 to 40 mg.cm) in the organic solution were varied keeping fixed temperature at 3...