Aqueous Two-Phase Systems

Aqueous Two-Phase Systems

Author: Rajni Hatti-Kaul

Publisher: Springer Science & Business Media

Published: 2008-02-05

Total Pages: 442

ISBN-13: 1592590284

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A mixture of two polymers, or one polymer and a salt, in an aqueous medium separates into two phases: this phenomenon is useful in biotechn- ogy for product separations. Separation of biological molecules and particles in these aqueous two-phase systems (ATPS) was initiated over 40 years ago by P.-Å. Albertsson, and later proved to be of immense utility in biochemical and cell biological research. A boost in the application of ATPS was seen when problems of separations in biotechnology processes were encountered. Its simplicity, biocompatibility, and amenability to easy scaleup operations make the use of ATPS very attractive for large-scale bioseparations. Despite the advantages ATPS enjoys over other separation techniques, the application of two-phase systems has for a long time been confined to selected labora- ries. Recent years have, however, shown a trend in which increasing numbers of researchers employ two-phase partitioning techniques in both basic and applied research.


Partitioning In Aqueous Two – Phase System

Partitioning In Aqueous Two – Phase System

Author: Harry Walter

Publisher: Elsevier

Published: 2012-12-02

Total Pages: 731

ISBN-13: 0323142915

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Partitioning in Aqueous Two-Phase Systems: Theory, Methods, Uses, and Applications to Biotechnology is a collection of papers that discusses the applications of aqueous two-phase systems to problems of separation and extraction of macromolecules, organelles, and cells. Papers focus on the theoretical basis and the practical details of the procedures used. Some of the papers describe in one or a few steps how two components can be separated by the investigator manipulating their partitions so that one component is in one phase and the other component is in the other phase or at the interface. Investigators can also avail of developed batch extractions for plant organelles, cell membranes, nucleic acids, and proteins. The book cites as an example the partitioning of right-side-out and inside-out vesicles (obtained from fragments of thylakoid membranes) to the top and bottom phases, respectively, of a Dx-PEG system. Other papers describe the use of the countercurrent distribution when single extraction steps are not sufficient to produce a separation in materials that do not differ greatly in their partitioning behavior. The collection can prove valuable for bio-chemists, cellular biologists, micro-biologists, and developmental biologists.


Separations Using Aqueous Phase Systems

Separations Using Aqueous Phase Systems

Author: D. Fisher

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 476

ISBN-13: 1468456679

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The use of aqueous two-phase systems for the partitioning of macromolecules, organelles and cells was originally developed by Per-Ake Albertsson in Sweden in the mid-fifties [1-3]. These systems were initially applied to separations of plant organelles and viruses but their use has now extended into most areas of cell biology and biochemistry [4,5]. Since 1979 biennial International Conferences on Partitioning in Aqueous Two-Phase Systems have been held in Los Angeles (1979), Sheffield (1981), Vancouver (1983) and Lund (1985). The 5th conference was held in Oxford from 23-28 August 1987 and was entitled "Advances in Separations Using Aqueous Phase Systems in Cell Biology and Biotechnology". It is the formal presentations from this meeting which comprise this volume. In contrast to earlier books on phase partitioning [4,5] this volume contains, for the first time, worldwide contributions from over sixty partitioners from a variety of scientific disciplines, thereby providing a detailed overview of the widespread application and potential of bioseparations using phase partitioning. Disciplines include Biophysics, Biochemistry, Cell Biology, Microbiology, Biotechnology and Process Engineering, in both academic and commercial establishments. These biennial conferences allow advances in these diverse partitioning fields to be reviewed and compared; they also provide an opportunity for those considering using phase partitioning to obtain information, advice and contacts. Attendance has grown steadily over the years and 140 scientists came to Oxford. The conference consisted of ten symposia on areas of application of partitioning which have been organised as specific chapters in this volume.


Extractive Bioconversions

Extractive Bioconversions

Author: B. Mattiasson

Publisher: CRC Press

Published: 1990-11-30

Total Pages: 348

ISBN-13: 9780824782726

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Contributors from European and US universities and corporations review recent developments in the integration of downstream processing and bioconversion, describing their experience with many separation technologies, including some still in the experimental stage. The topics include the construction


Biocatalytic Membrane Reactors

Biocatalytic Membrane Reactors

Author: Enrico Drioli

Publisher: CRC Press

Published: 1998-11-27

Total Pages: 240

ISBN-13: 9780748406548

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This research level reference book has been co-written by Enrico Drioli, perhaps one of the world's best known researchers into membrane technology. The application of membrane technology to chemical transformation and molecular separation are beginning to be exploited in the pharmaceutical science and biotechnology industries, but there is a need for researchers and students to have up-to-date literature - and this book provides it. The book will be of interest to students of chemistry, chemical engineering, pharmacy and biotechnology.


Aqueous Two-Phase Systems for Bioprocess Development for the Recovery of Biological Products

Aqueous Two-Phase Systems for Bioprocess Development for the Recovery of Biological Products

Author: Marco Rito-Palomares

Publisher: Springer

Published: 2017-07-18

Total Pages: 196

ISBN-13: 3319593099

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This comprehensive and unique text presents a full overview of downstream processing useful for those new to the concept as well as professionals with experience in the area. The history and theoretical principles of Aqueous Two-Phase Systems (ATPS) are covered in depth. Information on ATPS characterization and application is included, and ATPS equilibria and system parameters that have significant effect on partition behavior are studied. Aqueous Two-Phase Systems for Bioprocess Development for the Recovery of Biological Products addresses specific applications of ATPS for the recovery and partial purification of high molecular weight compounds such as proteins, nucleic acids and polysaccharides, particulate bioproducts such as cells and organelles and low molecular weight compounds. Non-conventional strategies involving ATPS such as affinity systems, continuous liquid-liquid fractionation stages and the recovery from plant extracts are presented. Economic analysis of the application of ATPS in comparison to other fractionation techniques, particularly liquid chromatography, is considered, as are opportunity and current trends in the ATPS research area. Each chapter utilizes the contributors' experimental expertise in traditional and non-conventional ATPS strategies, as well as analysis of areas of opportunity and perspectives on the development and future applications of ATPS in both the lab and larger scale operations. The result is a thorough and singular overview of ATPS which has not been matched by any other text on the market.


Liquid Biphasic System

Liquid Biphasic System

Author: Pau Loke Show

Publisher: Elsevier

Published: 2020-11-28

Total Pages: 330

ISBN-13: 0128223987

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Downstream bioprocesses have a significant role to play in the creation of a sustainable bio-based economy, enabling the creation of new products and systems from the more sustainable bioprocessing of natural products. Liquid Biphasic System: Fundamentals, Methods, and Applications in Bioseparation Technology explores in detail the fundamental processes and applications of this new separation system, aiding understanding of the basic principles of the technique and offering constructive criticisms on the latest findings.Including coverage of the background, principles, mechanisms, and applications, Liquid Biphasic System addresses how to adapt the technology for the purification of useful compounds with greater cost efficiency and greener processing. It is essential reading for bioprocess engineers, biochemical engineers, biosystem engineers, chemists and microbiologists working in the fields of bioprocessing. Researchers, scientists, and engineers concerned with the selection and evaluation of alternative bioseparation processes will find the book particularly useful. - Provides information and examples of advanced separations in a single source - Includes detailed descriptions of novel bioseparation systems - Covers the latest technologies related to advanced liquid–liquid separation and their applications in various industries


Separation Technologies for the Industries of the Future

Separation Technologies for the Industries of the Future

Author: Panel on Separation Technology for Industrial Reuse and Recycling

Publisher: National Academies Press

Published: 1999-01-22

Total Pages: 128

ISBN-13: 0309592828

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Separation processes—or processes that use physical, chemical, or electrical forces to isolate or concentrate selected constituents of a mixture—are essential to the chemical, petroleum refining, and materials processing industries. In this volume, an expert panel reviews the separation process needs of seven industries and identifies technologies that hold promise for meeting these needs, as well as key technologies that could enable separations. In addition, the book recommends criteria for the selection of separations research projects for the Department of Energy's Office of Industrial Technology.


Ionic-Liquid-Based Aqueous Biphasic Systems

Ionic-Liquid-Based Aqueous Biphasic Systems

Author: Mara G. Freire

Publisher: Springer

Published: 2016-10-05

Total Pages: 322

ISBN-13: 3662528754

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This book offers comprehensive information on the fundamentals and applications of ionic-liquid-based aqueous biphasic systems, which have predominantly (and successfully) been employed as alternative platforms for the extraction, separation and purification of diverse high-value products. The book consists of an initial introduction providing a brief overview, from fundamentals to applications, followed by nine chapters addressing the respective phase diagrams (interpretation and characterization) and remarkable examples of their applications. It also includes two final chapters focusing on recent developments in the search for more environmentally-benign and biocompatible ionic-liquid-based aqueous biphasic systems, and on the progress made to date concerning the recovery, recycling and reuse of the phase-forming components, the goal being the development of cost-effective and sustainable processes. The book offers an interesting and useful guide for a broad readership in the fields of green chemistry, biotechnology, chemical engineering, and biochemistry, among others. Mara G. Freire is a Coordinator Researcher at CICECO - Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Portugal.


Aqueous Two-Phase Systems

Aqueous Two-Phase Systems

Author: Harry Walter

Publisher: Elsevier

Published: 1994-04-18

Total Pages: 768

ISBN-13: 9780121821296

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General methodology and apparatus: phase diagrams, preparation and analysis of two-phase systems, partioning and affinity partitioning of macromolecules: Proteins, nucleic acids, studies on protein interactionsmolecular structure, charge, hydrophobicity, and conformational chan ges, partitioning and affinity partitioning of particulates,organellesseparation and subfractionation, menbrane: separation and subfractionation, membrane domain analysis, aqueous phase separation in biologicalsystems, aqueous two-phase systems in large-scale process biotechnolo gy, proteins; downstream processing, design of proteins for enhanced extraction, other applications of aqueous phases in biotechnology. Enzymology.