Download or read book Pseudomonas Oleovorans as a Source of Poly Beta Hydroxyalkanoates for Potential Applications as Biodegradable Polyesters written by Helmut Brandl and published by . This book was released on 1988 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pseudomonas oleovorans was grown in homogeneous media containing n-alkanoic acids, from formate to decanoate, as the sole carbon sources. Formation of intracellular poly (beta-hydroxyalkanoates) was observed only for hexanoate and the higher n-alkanoic acids. The maximum isolated polymer yields were approximately 30% of the cellular dry weight with growth on either octanoate or nonanoate. In most cases, the major repeating unit in the polymer had the same chain length as the n-alkanoic acid used for growth, but units with two carbon atoms less or more than the acid used as a carbon source were also generally present in the polyesters formed. Indeed, copolymers containing as many as six different types of beta-hydroxyalkanoate units were formed. The weight average molecular weights of the poly(beta-hydrocyalkanoate) copolymers produced by P. oleovorans ranged from 90,000 to 370,000. In spite of the higher cell yields obtained with octanoate and nonanoate, the use of hexanoate and heptanoate yielded higher-molecular-weight polymers. These copolyesters represent an entirely new class of biodegradable thermoplastics. Reprints. (mjm).
Download or read book Ability of the Phototrophic Bacterium Rhodospirillum Rubrum to Produce Various Poly Beta Hydroxyalkanoates Potential Sources for Biodegradable Polyesters written by Helmut Brandl and published by . This book was released on 1989 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies have been carried out in order to optimize growth and culture conditions for the intracellular formation of poly Beta-hydroxyalkanoates) (PHA) in the phototrophic, purple, non-sulphur bacterium Rhodospirillum rubrum. Its potential to produce novel copolymers was investigated. Recently, it has become of industrial interest to evaluate these polyesters as potentially biodegradable plastics for a wide range of possible applications. On an industrial scale, the use of photosynthetic bacteria could harness sunlight as an energy source for the production of these materials. R. rubrum was grown anaerobically in the light on different linear and content of up to 45% of cellular dry weight was detected. When R. rubrum was grown on different concentrations of various n-alkanoic acids, intracellular PHA production was detected on all acids used. In most of the cases, the storage polymer contained Beta-hydroxybutyrate (HB) and Beta-hydroxyvalerate (HV) monomer units. Grown on n-alkanoic acid as the carbon source, a polyester which contained HB, HV, HC, and Beta-hydroxyheptanoate was formed. These copolyesters represent a novel class of biodegradable thermoplastics. Reprints. (AW).
Download or read book Preparation Characterization and Modification of Poly beta hydroxyalkanoates from Pseudomonas Oleovorans written by Young Baek Kim and published by . This book was released on 1991 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pseudomonas written by Juan-Luis Ramos and published by Springer Science & Business Media. This book was released on 2007-07-23 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume collects new information on the genomics of saprophytic soil Pseudomonas, as well as functions related to genomic islands. It explores life styles in different settings and sheds further insights on the wide metabolic potential of this microbe for the removal of pollutants and production of added-value products. This volume also explores how Pseudomonas responds and reacts to environmental signals, including detection of cell density.
Download or read book Biodegradable Polymers for Industrial Applications written by Robin Smith and published by Elsevier. This book was released on 2005-05-06 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vast majority of plastic products are made from petroleum-based synthetic polymers that do not degrade in a landfill or in a compost-like environment. Therefore, the disposal of these products poses a serious environmental problem. An environmentally-conscious alternative is to design/synthesize polymers that are biodegradable. Biodegradable polymers for industrial applications introduces the subject by outlining the classification and development of biodegradable polymers. Materials available for the production of biodegradable polymers are explored. Polymers derived from sugars, natural fibres, renewable forest resources, poly(lactic acid) and protein-nanoparticle composites are looked at in detail in this section. The properties and mechanisms of degradation are looked at, prefacing the subject with a chapter on current standards. The final part explores opportunities for industrial applications, with chapters on packing, agriculture and biodegradable polycaprolactone foams in supercritical carbon dioxide. Biodegradable polymers for industrial applications explores the fundamental concepts concerning the development of biodegradable polymers, degradable polymers from sustainable sources, degradation and properties and industrial applications. It is an authoritative book that is invaluable for academics, researchers and policy makers in the industry. Reviews the importance and industrial use of biodegradable polymers and degradable polymers from sustainable sources An invaluable resource for both academics and industry Edited by a leading authority in the field with contributions from a worldwide team of experts
Download or read book Polyhydroxyalkanoates plastic Materials of the 21st Century written by Tatʹi͡ana Grigorʹevna Volova and published by Nova Publishers. This book was released on 2004 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Special Interest Catogories: biotechnology; materials science; medicine; ecology and chemistry. The book summarizes the literature data and research results on biodegradable polyesters of microbiological origin -- polymers of hydroxy alkanoic acids (polyhydroxyalkanoates, PHAs). These polymers are thermoplastic, biodegradable, and biocompatible. They are promising candidates for applications in agriculture, communal services, pharmacology, medicine, and other spheres. The book sums up the most recent data on the known types of polyhydroxyalkanoates, their producers, substrates, and methods of biosynthesis. The structure and physicochemical properties of these polymers, the methods used to process them to make specialised products and spheres of their application are described in the book.
Download or read book Pseudomonas Oleovorans as a Source of Bioplastics written by Hans Preusting and published by . This book was released on 1992 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pseudomonas Oleovorans as a Source of Bioplastics written by Johannes Cornelis Gerardus Preusting and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biomolecules from Natural Sources written by Vijai Kumar Gupta and published by John Wiley & Sons. This book was released on 2022-04-20 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomolecules from Natural Sources An up-to-date exploration of new and novel biomolecules In Biomolecules from Natural Sources: Advances and Applications, a team of accomplished researchers delivers up-to-date information on various bioresources, bioprocessing, production, mechanisms of action for selective bioactivity, biochemistry, targeted therapeutic roles and the advancements made on their bioactive potentials of new and novel biomolecules. The book presents recent trends in new and novel biomolecules and their identification, characterization, and potential applications. The selected contributions canvas a variety of breakthroughs in the understanding and applications of naturally derived biomolecules. Biomolecules from Natural Sources: Advances and Applications is an exhaustive collection of research and information, as well as an insightful and interdisciplinary treatment of a rapidly developing field. Readers will also find: A thorough introduction to phenolics from natural sources and plant-based natural artemisinin and its biomedical applications Comprehensive explorations of protein structure, function, and specificity and the pharmacological potential of pigments Practical discussions of biomolecules obtained through food biotechnology and the biological activities of natural glycosides In-depth examinations of biomolecules from basil and their pharmacological significance Perfect for biotechnologists, food technologists, and plant biologists, Biomolecules from Natural Sources: Advances and Applications will also earn a place in the libraries of bioprocessing engineers, as well as undergraduate and postgraduate students of biochemistry.
Download or read book Nanocomposites with Biodegradable Polymers written by Vikas Mittal and published by OUP Oxford. This book was released on 2011-04-28 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bio-nanocomposites combine the enhanced properties of commercial polymer nanocomposites with the low environmental impact of biodegradable material, making them a topic of great current interest. Because of their tremendous role in reducing dependency on commercial non-biodegradable polymers, and their environmentally-friendly nature, bio-nanocomposites need to be studied in greater detail. In this book, recent advancements in their development are brought together in a single text, to provide researchers with a thorough insight into the various systems, and to open up future perspectives. Although the commercial applications of these bio-nanocomposites are in their infancy, these materials have a huge commercial potential. In setting out the next generation of advances in nanocomposite technology, this book opens the way for further developments in the field. Describing the subject as a whole, from a basic introduction to the more specific systems and advancements, this book can be used both as a professional reference and for teaching purposes.
Download or read book Microbial Biopolyester Production Performance and Processing Microbiology Feedstocks and Metabolism written by Martin Koller and published by Bentham Science Publishers. This book was released on 2016-09-30 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global plastic production is estimated to be over 300Mt annually. Most conventional plastics are predominantly produced from fossil fuels and are highly resistant to biodegradation, and only a small share of about 20% of spent plastics is believed to be recycled, which is a cause for environmental concern. Biodegradable plastics would solve this concern as they are a sustainable alternative, yet these do not even cover 5% of the global plastic market. Microbial polyhydroxyalkanoates (PHAs) are a versatile group of polyesters produced by nature as prokaryotic storage materials. PHAs can be produced through sustainable bioprocess engineering and have displayed remarkable flexibility in their physical and chemical properties. PHAs are the subject of several scientific papers and numerous PHA patents have also been filed, generating significant interest in the plastic production industry. To develop overall sustainable and efficient production processes, all bioprocess steps need to be thoroughly understood and accounted for. These processes start with the selection of suitable inexpensive raw materials (microbes and enzymes), optimizing the process engineering and process regime, and conclude with the enhancement of product recovery in terms of time, energy, and material input. Microbial Biopolyester Production, Performance and Processing: Microbiology, Feedstocks, and Metabolism encompasses eight chapters that cover aspects of the microbiology and biotechnology of producing biodegradable plastics. The contents focus on the selection of powerful archaeal and eubacterial production strains, genetic engineering as a tool for optimized PHA production and inexpensive carbon sources for microbial cultures. The volume is a useful resource for bioprocess engineers, microbiologists, biotechnologists and chemical engineers interested in the basics of biodegradable plastic production. Recent Advances in Biotechnology is a book series comprising of peer-reviewed reference works and monographs that compile the latest developments in the field of biotechnology. Each volume has a thematic focus and features topical reviews written by experts. The series will highlight multidisciplinary perspectives to interested readers (biotechnologists, microbiologists, bioprocess engineers, agronomists, medical professionals, sustainability researchers etc.)
Download or read book Polymeric Biomaterials written by Pooja Agarwal and published by CRC Press. This book was released on 2022-12-30 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomaterials include a versatile group of molecules that have been designed to interact with biological systems for various applications and polymeric biomaterials are being designed based on their availability and compatibility. This book summarizes fabrication techniques, features, usage, and promising applications of polymeric biomaterials in diversified areas including advantageous industrial applications. Each chapter exclusively covers a distinct application associated with major classes of polymeric biomaterials. Features: Provides platform related to fabrication and advancement of all categories of polymeric biomaterials Explores advancement of pertinent biomedical and drug delivery systems Includes wide range of biomaterials and its application in diversified fields Gives out environmental justification of green biopolymers and their applications in water remediation Discusses advanced applications of bio-composite polymers viz. food packaging and anti-corrosive coatings This book is aimed at researchers in Polymer Sciences, Biomaterials, Chemical/Bio Engineering, Materials Chemistry, and Biotechnology.
Download or read book Degradable Materials written by Sumner A. Barenberg and published by CRC Press. This book was released on 2018-01-18 with total page 773 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the fields of biodegradation, environmental degradation, and photochemical degradation. The purpose of the book is to establish guidelines for terminology, nomenclature, characterization techniques and methodology, mechanisms of degradation, standard reference materials, and issues and needs. This is the first scientific book of this nature based on the findings of the world's leading scientists (academic, industrial, and federal) in this field. Hard data is presented and soft data is identified under issues and needs. New areas covered are such topics as: biodegradation with in vivo applications, environmental degradation, including anaerobic, aerobic, characterization techniques and methodology, photochemical degradation, and secondary issues associated with degradation. This publication contains information vital to environmental scientists and engineers, biomaterials scientists, pharmaceutical technologists, and chemists.
Download or read book Bacterial Biopolymers written by Bolin Kumar Konwar and published by CRC Press. This book was released on 2023-09-01 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bacterial biopolymers are a competitive new area of research with potential applications in agriculture, petroleum exploration, and use as biodegradable plastics. This new volume provides comprehensive coverage of bacterial biopolymers. The book elucidates the main classes of bacterial biopolymers—polysaccharides and polyesters or polyhydroxyalkanoates (PHAs)—along with their definition, classification, detection, extraction, characterization, fermentation process, structure and properties, applications and uses, functions, and more. The volume covers Detection, extraction, and characterization of bacterial biopolymers Molecular identification of bacterial isolates The fermentation process Structure and properties of PHAs Biochemical characterization of the PHA-producing bacterial strains In vitro biodegradation study of PHA film by soil microorganisms PHAs for enhancing the stability of colloidal silver nanoparticles (SNP) This volume is an important source of information on the concerned bacteria, the biochemical characteristics of biopolymers, and their potential use.
Download or read book Microbial Biopolyester Production Performance and Processing Bioengineering Characterization and Sustainability written by Martin Koller and published by Bentham Science Publishers. This book was released on 2016-12-06 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global plastic production is estimated to be over 300Mt annually. Most conventional plastics are predominantly produced from fossil fuels and are highly resistant to biodegradation, and only a small share of about 20% of spent plastics is believed to be recycled, which is a cause for environmental concern. Biodegradable plastics would solve this concern as they are a sustainable alternative, yet these do not even cover 5% of the global plastic market. Microbial polyhydroxyalkanoates (PHAs) are a versatile group of polyesters produced by nature as prokaryotic storage materials. PHAs can be produced through sustainable bioprocess engineering and have displayed remarkable flexibility in their physical and chemical properties. PHAs are the subject of several scientific papers and numerous PHA patents have also been filed, generating significant interest in the plastic production industry. To develop overall sustainable and efficient production processes, all bioprocess steps need to be thoroughly understood and accounted for. These processes start with the selection of suitable inexpensive raw materials (microbes and enzymes), optimizing the process engineering and process regime, and conclude with the enhancement of product recovery in terms of time, energy, and material input. Microbial Biopolyester Production, Performance and Processing: Bioengineering, Characterization, and Sustainability is a compilation of eight chapters covering bacterial polyesters, green plastics and PHAs from various angles. The contents of this volume focus on sustainable practices focus on the sustainability of processes that involve the synthesis and recycling of these meterials. The volume is a useful resource for bioprocess engineers, microbiologists, biotechnologists and chemical engineers interested in the basics of biodegradable plastic production.
Download or read book Biodegradable Polymers and Plastics written by Emo Chiellini and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic and semi-synthetic polymeric materials were originally developed for their durability and resistance to all forms of degradation including biodegradation. Such materials are currently widely accepted because of their ease of processability and amenability to provide a large variety of cost effective items that help to enhance the comfort and quality of life in the modern industrial society. However, this widespread utilization of plastics has contributed to a serious plastic waste burden, and the expectation for the 21st century is for an increased demand for polymeric material. This volume focuses on a more rational utilization of resources in the fabrication, consumption and disposal of plastic items, specifically: -Environmentally Degradable Polymeric Materials (EDPs); -Water-soluble/Swellable Biodegradable Polymers; -EDPs from Renewable Resources; -Biopolymers; -Bioresorbable Materials for Biomedical Applications; -Biorelated Polymers; -Standards and Regulations on EDPs.
Download or read book Advances in Polyhydroxyalkanoate PHA Production Volume 2 written by Martin Koller and published by MDPI. This book was released on 2020-05-20 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays, we are witnessing highly dynamic research activities related to the intriguing field of biodegradable materials with plastic-like properties. These activities are stimulated by the strengthened public awareness of prevailing ecological issues connected to growing piles of plastic waste and increasing greenhouse gas emissions; this goes hand-in-hand with the ongoing depletion of fossil feedstocks, which are traditionally used to produce full carbon backbone polymers. Polyhydroxyalkanoate (PHA) biopolyesters, a family of plastic-like materials with versatile material properties, are increasing considered to be a future-oriented solution for diminishing these concerns. PHA production is based on renewable resources and occurs in a bio-mediated fashion through the action of living organisms. If accomplished in an optimized way, PHA production and the entire PHA lifecycle are embedded into nature´s closed cycles of carbon. Sustainable and efficient PHA production requires understanding and improvement of all the individual process steps. Holistic improvement of PHA production, applicable on an industrially relevant scale, calls for, inter alia, consolidated knowledge about the enzymatic and genetic particularities of PHA-accumulating organisms, an in-depth understanding of the kinetics of the bioprocess, the selection of appropriate inexpensive fermentation feedstocks, tailoring of PHA composition at the level of its monomeric constituents, optimized biotechnological engineering, and novel strategies for PHA recovery from biomass characterized by low energy and chemical requirements. This Special Issue represents a comprehensive compilation of articles in which these individual aspects have been addressed by globally recognized experts.
