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Polyhydroxyalkanoates microbial

Biochemical and Molecular Basis of Microbial Synthesis of Polyhydroxyalkanoates in Microorganisms... [Pg.81]

Keywords. Polyhydroxyalkanoic acids, Microbial polyesters, PHA, PHA synthase, Metabolic engineering, PHA granules, Ralstonia eutropha, Pseudomonas aeruginosa... [Pg.81]

Polyhydroxyalkanoate (PHA) is a biodegradable and biocompatible thermoplastic that can be synthesized in many microoiganisms from almost all genera of the microbial kingdom. Many microoiganisms synthesize polyhydroxyalkanoates (PHAs) as intracellular carbon and energy reserve materials [1]. These microbial polyesters materials are thermoplastics with biodegradable properties [2]. PHAs are usually accumulated... [Pg.187]

W. T. Liu, A. T. Nielsen, J. H. Wu, C. S. Tsai, Y. Matsuo and S. Molin (2001). In situ identification of polyphosphate- and polyhydroxyalkanoate-accumulating traits for microbial populations in a biological phosphorus removal process. Environ. Microbiol., 3, 110-122. [Pg.240]

Polyester is a general term referring to any polymer where the monomers are linked by ester bonds and includes the biodegradable microbially derived polyhydroxyalkanoates, which, as they are naturally produced, are beyond the scope of this article (for a review see Kim Rhee, 2003). Most synthetic polyesters in large-scale use are the aromatic poly(ethylene tetraphthalate) or poly(butylene tetraphthalate) polyesters as they have excellent material properties and are used in a wide range of applications including plastic containers, fibres for synthetic fabrics, films... [Pg.223]

Abstract Polyhydroxyalkanoate (PHA) is a plastic-like material synthesized by many bacteria. PHA serves as an energy and carbon storage componnd for the bacteria. PHA can be extracted and purified from the bacterial cells and the resulting product resembles some commodity plastics such as polypropylene. Because PHA is a microbial product, there are natural enzymes that can degrade and decompose PHA. Therefore, PHA is an attractive material that can be developed as a bio-based and biodegradable plastic. In addition, PHA is also known to be biocompatible and can be used in medical devices and also as bioresorbable tissue engineering scaffolds. In this chapter, a brief introduction about PHA and the fermentation feedstock for its production are given. [Pg.1]

Abstract Polyhydroxyalkanoate (PHA) is an attractive material because it can be produced from renewable resources and because of its plastic-like properties. In addition, PHA can be degraded by the action of microbial enzymes. Although PHA resanbles some commodity plastics, the performance and cost of PHA are not yet good enough for widespread applications as plastic materials. Therefore, the PHA commercialization attempts by many industries for bulk applications have been challenging. However, PHA also possesses interesting properties that can be developed for non-plastic applications. This chapter describes some new niche applications for PHA in cosmetics and wastewater treatment. [Pg.79]

Abstract Polyhydroxyalkanoate (PHA) initially received serious attention as a possible substitute for petrochemical-based plastics because of the anticipated shortage in the supply of petroleum. Since then, PHA has remained as an interesting material to both the academia and indusby. Now, we know more about this microbial storage polyester and have developed efficient fermentation systems for the large-scale production of PHA. Besides sugars, plant oils will become one of the important feedstock for the industrial-scale production of PHA. In addition, PHA will find new apphcations in various areas. This chapter summarizes the future prospects and the importance of developing a sustainable production system for PHA. [Pg.101]

Braunegg G, Lefebvre G, Genser KF (1998) Polyhydroxyalkanoates, biopolyesters from renewable resources physiological and engineering aspects. J Biotechnol 65 127-161 Braunegg G, Sonnleitner B, Lafferty RM (1978) A rapid gas chromatographic method for the determination of poly-P-hydroxybutyric acid in microbial biomass. Eur J Appl Microbiol Biotechnol 6 29-37... [Pg.105]

Jendrossek D, Handrick R (2002) Microbial degradation of polyhydroxyalkanoates. Annu Rev Microbiol 56 403-432... [Pg.112]

Khanna S, Srivastava AK (2005a) Recent advances in microbial polyhydroxyalkanoates. Process Biochem 40 607-619... [Pg.114]

Philip S, Keshavarz T, Roy I (2007) Polyhydroxyalkanoates biodegradable polymers with a range of applications. J Chem Technol Biotechnol 82 233-247 Pierce L, Schroth MN (1994) Detection of pseudomonas colonies that accumulate poly-beta-hydroxybutyrate on Nile blue medium. Plant Dis 78 683-685 Pijuan M, Casas C, Baeza JA (2009) Polyhydroxyalkanoate synthesis using different carbon sources by two enhanced biological phosphorus removal microbial communities. Process Biochem 44 97-105... [Pg.121]

Rehm BHA (2007) Biogenesis of microbial polyhydroxyalkanoate granules a platform technology for the production of tailor-made bioparticles. Curr Issues Mol Biol 9 41-62 Reijnders L, Huijbregts MAJ (2008) Palm oil and the emission of carbon-based greenhouse... [Pg.122]

Sudesh K (2004) Microbial polyhydroxyalkanoates (PHAs) an emerging biomaterial for tissue engineering and therapeutic applications. Med J Malays 59 Suppl B 55-56 Sudesh K, Abe H (2010) Practical guide to microbial polyhydroxyalkanoates. Smithers Rapra Technology, UK... [Pg.125]

Taguchi S, Yamada M, Matsumoto K, Tajima K, Satoh Y, Munekata M, Ohno K, Kohda K, Shimamura T, Kambe H, Obata S (2008) A microbial factory for lactate-btised polyesters using a lactate-polymerizing enzyme. Proc Nat Acad Sci US Am 105 17323-17327 Takagi Y, Hashii M, Maehara A, Yamane T (1999) Biosynthesis of polyhydroxyalkanoate with a thiophenoxy side group obtained from Pseudomonas putida. Macromolecules 32 8315-8318... [Pg.126]

Wang YW, Mo W, Yao H, Wu Q, Chen J, Chen GQ (2004) Biodegradation studies of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate). Polym Degrad Stab 85 815-821 Wang YW, Wu Q, Chen GQ (2003) Reduced mouse fibroblast cell growth by increased hydro-philicity of microbial polyhydroxyalkanoates via hyaluronan coating. Biomaterials 24 4621 629... [Pg.128]

Polymers Obtained by Microbial Production 5.5.3.1 Polyhydroxyalkanoates (bacterial polyesters)... [Pg.192]

Laycock, B., Halley, R, Pratt, S., Werker, A., Lant, R, The chemomechanical properties of microbial polyhydroxyalkanoates. Progr sJnPolyrner 3-4, 536-583 (2013), DOI http //dx.doi.0rg/lO.lOl6/j.prog polymsci.2012.06.003. [Pg.921]

Some synthetic polymers like, polyurethanes, specifically polyether-polyurethanes, are likely to be degraded by microbes but not completely. However, several polymers such as, polyamides, polyfluorocarbons, polyethylene, polypropylene, and polycarbonate are highly resistant to microbial degradation. Natural polymers are generally more biodegradable than synthetic polymers specifically, polymers with ester groups like aliphatic polyesters [1]. Therefore, several natural polymers such as cellulose, starch, blends of those with synthetic polymers, polylactate, polyester-amide, and polyhydroxyalkanoates (PHAs) have been the focus of attention in the recent years [3]. [Pg.398]

Byrom, D. Polyhydroxyalkanoates. In Mobley, D.P.(ed.) Plastic from Microbes Microbial Synthesis of Polymers and Polymer precursors, pp. 5-33. Hanser Munich (1994)... [Pg.417]

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