a new isolated strain of sporobolomyces ruberrimus h110 was cultivated  on technical glycerol as carbon source and effect of different temperatures and ph on the growth and pigmentation was studied. the maximum concentration of total carotenoid was 3.84 mgg-1 including torularhodin (3.70 mgg-1) and β-carotene (0.14 mgg-1) using 19ºc at ph 6, but the highest amount of the maximum specific growth...

BACKGROUND Most bacteria are grown in a binary fission way meaning a bacterial cell is equally divided into two. Polyhydroxyalkanoates (PHA) can be accumulated as inclusion bodies by bacteria. The cell division way and morphology have been shown to play an important role in regulating the bacterial growth and PHA storages. RESULTS The common growth pattern of Escherichia coli was changed to m...

Polyhydroxyalkanoates (PHAs) are natural polyesters of increasing biotechnological importance that are synthesized by many prokaryotic organisms as carbon and energy storage compounds in limiting growth conditions. PHAs accumulate intracellularly in form of inclusion bodies that are covered with a proteinaceous surface layer (granule-associated proteins or GAPs) conforming a network-like surfac...

The biological reductive dechlorination (BRD) process is often limited by the lack of suitable electron donors, requiring supply long-lasting substrates to enhance metabolism. Among others, polyhydroxyalkanoates (PHA) are a particularly interesting slow-release source electron-donors, being entirely biodegradable polyesters. Generally, industrial PHA production processes based on pure culture f...

Conversion of organic waste and wastewater to polyhydroxyalkanoates (PHAs) offers a potential recover valuable resources from waste. Microbial community-based PHA production systems have been successfully applied in the last decade at lab- pilot-scales, with total 19 pilot installations reported scientific literature. In this review, research pilot-scale on microbial is categorized subsequently...

     Nowadays, hydrogels are widely used as wound dressings in biomedical applications. Similar to other types of the moist (wet) wound dressings, it is necessary to have sufficient information about their dehydration kinetics during the pre-usage period (e.g. storage duration) and also the wound healing process. In this work, hydrogel wound dressings based on polyvinyl alcohol were prepared by...

Polyhydroxyalkanoates (PHAs) are biodegradable polyesters that have a wide variety of physical properties dependent on the lengths of the pendant groups of the monomer units in the polymer. PHAs composed of mostly short-chain-length (SCL) monomers are often stiff and brittle, whereas PHAs composed of mostly medium-chain-length (MCL) monomers are elastomeric in nature. SCL-MCL PHA copolymers can...

Polyhydroxyalkanoates (PHAs) are biodegradable biocompatible polyesters, which accumulate as granules in the cytoplasm of many bacteria under unbalanced growth conditions. Medium-chain-length PHAs (mcl-PHAs), characterized by C6-C14 branched monomer chains and typically produced by Pseudomonas species, are promising thermoelastomers, as they can be further modified by introducing functional gro...

Polyhydroxyalkanoates (PHA), an intracellular energy and carbon storage polymer, can be accumulated in activated sludge in substantial quantities under wastewater dynamic treatment (i.e., substrate feast-famine) conditions. However, its influence on hydrogen production has never been investigated before. This study therefore evaluated the influences of PHA level and composition in waste activat...

Wastewater from the yeast production industry (WWY) is potentially harmful to surface water due its high nitrogen and organic matter content; it can be used produce compounds of higher commercial value, such as polyhydroxyalkanoates (PHA). PHA are polyester-type biopolymers synthesized by bacteria energy reservoirs that substitute petrochemical-derived plastics. In this exploratory work, efflue...