Polyhydroxyalkanoates (PHAs) is reported as polyesters of hydroxyalkanoates (HAs) which is generally synthesized by numerous bacteria and it is stored in the cytoplasm of cells as an intracellular carbon and energy sources compound. It has been considered as a replacement for conventional plastics. Microbial cell such as Alcaligenes, Pseudomonas, recombinant Escherichia coli and methylotrophs a...

Polyhydroxyalkanoates (PHAs) have become important due to their mechanical properties, which resemble those of plastics derived from petrochemicals. Despite the advantages they possess, its use is limited by production costs. In terms culture systems used for process improvement, fed batch are most studied, since allow higher productivity be obtained. this study, PHAs was reviewed with a new fe...

A new protein immobilization and purification system has been developed based on the use of polyhydroxyalkanoates (PHAs, or bioplastics), which are biodegradable polymers accumulated as reserve granules in the cytoplasm of certain bacteria. The N-terminal domain of the PhaF phasin (a PHA-granule-associated protein) from Pseudomonas putida GPo1 was used as a polypeptide tag (BioF) to anchor fusi...

Large amounts of homopolymers containing -hydroxybutyrate (PHB) and copolymers containing -hydroxyvalerate (P[HB-co-HV]) are produced by Azotobacter chroococcum strain H23 when growing in culture media amended with alpechı́n (wastewater from olive oil mills) as the sole carbon source. Copolymer was formed when valerate (pentanoate) was added as a precursor to the alpechı́n medium, but it was not ...

Researchers in Dallas, Texas, conducted an HIV eradication study and recently published an account of their work. Between 2002 and 2005, four PHAs whose viral load was very low (less than 50 copies) for several years, were enrolled in a study to try to reduce the level of HIV infection of their cells. In addition to their treatment regimens, all participants also received T-20 (enfuvirtide, Fuz...

Polyhydroxyalkanoates (PHAs) are polyoxoesters of R-hydroxyalkanoic acid monomers accumulated in bacterial cytoplasm as granules when carbon sources are available in excess and other nutrients such as nitrogen and phosphorus are limited in their surroundings (Dawes and Senior, 1972; Lee et al., 1999). They act as carbonenergy reserves and also as electron sinks, which enhance the fitness of the...

High substrate costs decrease the profitability of polyhydroxyalkanoates (PHAs) production, and thus low-cost carbon substrates coming from agricultural and industrial residuals are tested for the production of these biopolymers. Among them crude glycerol, formed as a byproduct during biodiesel production, seems to be the most promising source of carbon. The object of this study was to characte...

The role that deficient institutional relationships have played in aggravating drinking water incidents over the last 30 years has been identified in several inquiries of high profile drinking water safety events, peer-reviewed articles and media reports. These indicate that collaboration between water utilities and public health agencies (PHAs) during normal operations, and in emergencies, nee...

The combined fermentation of sludge from the secondary sedimentation tank of municipal wastewater treatment plants and food waste enables not only waste reduction, but also the acquisition of volatile fatty acids (VFAs) for the biosynthesis of polyhydroxyalkanoates (PHAs). To better understand variables influencing the production of VFAs and PHAs, this study considered anaerobic fermentation of...

Bioplastics are biodegradable polymers that made by bacterial cells, whose molecules have biochemical properties similar to petrochemical as they concentrated inside intracellular granules a carbon and energy sources, which then degrade in the environment get exposed light. desirable renewable qualities, sustainable qualities well alternatives petroleum-based plastics, is used due much of its b...