Download or read book Dispersed and Deposited Polyelectrolyte Complexes and Their Interactions to Chiral Compounds and Proteins written by Wuye Ouyang and published by . This book was released on 2009 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dispersed and Deposited Polyelectrolyte Complexes and Their Interactions to Chiral Compounds and Proteins written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyelectrolyte complexation is a rapidly growing field with applications in functional multilayer (PEM) and nanoparticle (PEC) generation, where PEM films are deposited using Layer-by-Layer technique initiated by Decher and PECs are prepared using mixing-centrifugation technique initiated by our group. Its advantages (e.g. easy preparation) result in various applications in aqueous solution, especially in pharmaceutical and biomedical fields. Therefore, the objectives in this study are to explore interesting applications of polyelectrolyte complexation in the field of low molecular chiral compound and high molecular protein binding. Due to the rapidly growing demands for preparing optically pure compounds in the pharmaceutical field, herein, enantiospecific PEM and PEC were prepared using chiral polyelectrolytes (e.g. homo-polypeptide) and their ability of chiral recognition was investigated by ATR-FTIR, UV/Vis etc. Chiral PEM and PEC showed pronounced enantiospecificity for both small (amino acids, vitamin) and large (protein) chiral compounds. This chiral recognition is performed by a diffusion process of chiral compounds into PEM based on the structures of chiral selector (PEM, PEC) and chiral probes (chiral compounds). However, the influences, e.g. pH value, ionic strength, surface orientation etc., were found to affect significantly the enantiospecificity. Beside planar substrates, porous membranes (e.g. PTFE) were modified using chiral PEM and successfully applied in enantiospecific permeation. Additionally, protein binding properties of PEC particle dispersions or PEC particle films were also studied. Due to the properties of polyelectrolytes used for PEC (e.g. molecular weight, charge density) and proteins (e.g. isoelectric point, size, hydrophobicity), PEC showed different uptake characteristics towards different proteins. Electrostatic and hydrophobic interaction as well as counterion release force were considered as possible driving forces for protein b.
Download or read book Chemical Engineering and Material Properties written by H.M. Zhang and published by Trans Tech Publications Ltd. This book was released on 2011-12-08 with total page 1600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters CPCI-S (WoS). The 2011 International Symposium on Chemical Engineering and Material Properties (ISCEMP 2011) was a premier forum for the presentation of technological advances and research results in the fields of chemical engineering and material properties. ISCEMP 2011 brought together leading engineers and scientists, working in chemical engineering and material properties, from around the world. The present peer-reviewed papers were selected on the basis of originality, technical quality and research content.
Download or read book Polyelectrolyte Complexes in the Dispersed and Solid State II written by Martin Müller and published by Springer. This book was released on 2013-08-23 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyelectrolyte Complexes for Tailoring of Wood Fibre Surfaces. Polyelectrolyte Complexes in Flocculation Applications. Spontaneous Assembly and Induced Aggregation of Food Proteins. Polyelectrolyte Complexes of DNA and Polycations as Gene Delivery Vectors. Sizing, Shaping and Pharmaceutical Applications of Polyelectrolyte Complex Nanoparticles.
Download or read book Polyelectrolyte Complexes in the Dispersed and Solid State written by Martin Müller and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of the General Properties of Some Polyelectrolyte Complexes written by Nermin Acar and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyelectrolyte complexes, also called interpolymer complexes, are new class of chemically distinct and identifiable compounds. They are formed by polyelectrolytes that are macromolecules carrying a relatively large number of functional groups, orunder suitable conditions can become charged. Polyelectrolytes interact with various low and high molecular weight substances and form interpolymer complexes. These complexes are either separated from the solution as solids (polycomplex salt) or may settle as a polyelectrolyte complex gel, and they can be soluble in solution by controlling experimental factors. They are, in general, obtained in either case, by mixing polyelectrolytes solution, and by matrix polymerization. Significant differences might exist between the chemical, thermal and mechanical properties ofinterpolymer complexes with respect to their components and experimental conditions. All biological macromolecules, proteins, nucleic acids, and polysaccharides are polyelectrolytes and interact with each other and small ions during their biological function. Their electrostatic interactions contribute a significant part of the structural stabilization of biological molecules and they are major determinants for the kinetics of biological process. Considering all these vital processes research on the polyelectrolyte complexes obtained by synthetic polyelectrolytes might be a simple model system for the complicated biopolymer reactions. Studying the special properties of polycomplex formation between synthetic polyelectrolytes and low molecular weight compounds can be useful for understanding the nature of protein-lipid interaction in biomembranes or in the mechanism of protein denaturation. On the other hand, polyelectrolyte complexes are very promising materials for semi-permeable membranes for the industrial applications such as desalting of sea water, ultrafiltration and purification of aqueous solution and also for ultrafiltration of biological liquids.With all the above given respects, numerous studies have been made successively onvarious polyelectrolyte complexes in the last two decades. However very few studies have been reported on the interaction between some certain polyphosphates andvinylpyridine polymers. One of a few studies with poly(phosphate) has been given by N.Acar and T.Tulun on the interaction of poly(sodiumphosphate) (PSP) andpoly(4-vinylpyridiniumchloride) (P4VPHCl). The present study was aimed to investigate the interaction between poly(sodiumphosphate) and poly(4-vinylpyridiniumchloride) with 4-amino benzoic acid (low molecular weight compound) individually as well as the detailed continuation of the previous work which dealt with the polyelectrolyte complex formed by PSP and P4VPHCl.Poly(sodium phosphate) is interesting because it is an inorganic polymer and, rather unusually it is one of the few anionic polymers of the integral type. Actually polyphosphates are somewhat analogous to the nucleic acids. Vinylpyridine polymers have particular importance as polyelectrolytes and have great ability to develop interpolymer complexes with polyacids.The present study aims to form polyelectrolyte model complexes similar to or mimicking biologically active compounds and, thus, to understand the operating mechanism of biopolymers in living organisms through the investigation of the structure and various features of these model complexes. In the experimental part of the study, insoluble polyelectrolyte complexes were obtained from the both, concentrated and dilute solutions of PSP and P4VPHCl. Stoichiometry of the isolated complexes were found to be 1:1 as a result of analysis of the supernatant liquid in conjunction with concentration of the initial components.In the dilute aqueous solution, occurrence of polyelectrolyte complex was proved by UV spectroscopy. Salt effect of NaCl, the effect of NaCl on complex formation andthermal properties of complexes were investigated.Regarding the reaction of PSP with 4-amino benzoic acid, hydrochloride (PABCl),the stoichiometry of complex was found as 1:1.2 using viscometric and volumetricanalysis of the supernatant. Besides, spectroscopic and conductometric methods were used for the complex stoichiometry. The experimental factors such as pH,ionic strength and temperature that affect the stoichiometry of complex were investigated.In the case of the poly(4-vinylpyridine) (P4VP) with 4-aminobenzoic acid, IR spectroscopy , potentiometry and DSC were used and the nature of binding between the components was identified as hydrogen bonding.It is known that transition metals take part in the biochemical process. In the present study, interaction of copper (II) with P4VP- PABA complex system is of interest. Potentiometric method was used to follow the above stated interaction in aqueousethanol solution for P4VP-PABA system. Protonation and the stability constants ofP4VP-PABA system were determined.Swelling properties of polyelectrolyte systems have been studied largely due to their industrial uses. In order to investigate the swelling properties of P4VPHCl-PSP system, PSP and P4VP that is the initial component of polycation were subjected to irradiation for six different radiation doses to obtain cross linked structure. It is found that radiation has no affect on PSP.After irradiation the insoluble, the gel, parts were determined by soxhlet extraction and UV spectroscopy. Up to certain dose the gelpercent of P4VP samples increased, and thereafter remained unchanged. From the relation between gel fraction and radiation dose, the efficiency of crosslinking and of scission were determined. Irradiated P4VP that contained only gel part was quaternized to obtain waterswellable P4VPHCl gel. The interaction of P4VPHCl gel with the aqueous solution of PSP was investigated considering ionic strength and pH.
Download or read book Polyelectrolytes written by Visakh P. M. and published by Springer. This book was released on 2014-09-03 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a valuable reference source to graduate and post graduate students, engineering students, research scholars polymer engineers from industry. The book provides the reader with current developments of theoretical models describing the thermodynamics polyelectrolytes as well as experimental findings. A particular emphasis is put on the rheological description of polyelectrolyte solutions and hydrogels.
Download or read book Polymer Colloids written by Rodney Priestley and published by Royal Society of Chemistry. This book was released on 2019-12-02 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Academic and industrial research around polymer-based colloids is huge, driven both by the development of mature technologies, e.g. latexes for coatings, as well as the advancement of new materials and applications, such as building blocks for 2D/3D structures and medicine. Edited by two world-renowned leaders in polymer science and engineering, this is a fundamental text for the field. Based on a specialised course by the editors, this book provides the reader with an invaluable single source of reference. The first section describes formation, explaining basic properties of emulsions and dispersion polymerization, microfluidic approaches to produce polymer-based colloids and formation via directed self-assembly. The next section details characterisation methodologies from microscopy and small angle scattering, to surface science and simulations. The final chapters close with applications, including Pickering emulsions and molecular engineering for materials development. A comprehensive guide to polymer colloids, with contributions by leaders in their respective areas, this book is a must-have for researchers and practitioners working across polymers, soft matter and chemical and molecular engineering.
Download or read book Modern Physical Organic Chemistry written by Eric V. Anslyn and published by University Science Books. This book was released on 2006 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt: In additionto covering thoroughly the core areas of physical organic chemistry -structure and mechanism - this book will escortthe practitioner of organic chemistry into a field that has been thoroughlyupdated.
Download or read book Advances in Chemical Physics Volume 161 written by Stuart A. Rice and published by John Wiley & Sons. This book was released on 2016-08-29 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Advances in Chemical Physics series provides the chemical physics field with a forum for critical, authoritative evaluations of advances in every area of the discipline. • This is the only series of volumes available that presents the cutting edge of research in chemical physics. • Includes contributions from experts in this field of research. • Contains a representative cross-section of research that questions established thinking on chemical solutions • Structured with an editorial framework that makes the book an excellent supplement to an advanced graduate class in physical chemistry or chemical physics
Download or read book Encyclopedia of Surface and Colloid Science written by P. Somasundaran and published by CRC Press. This book was released on 2006 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Book of Abstracts written by and published by . This book was released on 2000 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index Medicus written by and published by . This book was released on 2004 with total page 2002 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Download or read book Supramolecular Chemistry in Corrosion and Biofouling Protection written by Viswanathan S. Saji and published by CRC Press. This book was released on 2021-12-23 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supramolecular chemistry, "the chemistry beyond the molecule", is a fascinating realm of modern science. The design of novel supramolecular structures, surfaces, and techniques are at the forefront of research in different application areas, including corrosion and biofouling protection. A team of international experts provide a comprehensive view of the applications and potential of supramolecular chemistry in corrosion and biofouling prevention. Chapter topics include types and fundamentals of supramolecules, supramolecular polymers and gels, host-guest inclusion compounds, organic-inorganic hybrid materials, metallo-assemblies, cyclodextrins, crown ethers, mesoporous silica and supramolecular structures of graphene and other advances. Additional Features include: Focuses on different aspects of supramolecular chemistry in corrosion and biofouling prevention. Comprehensively covers supramolecular interactions that can provide better corrosion and biofouling protection. Provides the latest developments in self-healing coatings. Explores recent research advancements in the suggested area. Includes case studies specific to industries. The different supramolecular approaches being investigated to control corrosion and biofouling are gathered in one well-organized reference to serve senior undergraduate and graduate students, research students, engineers, and researchers in the fields of corrosion science & engineering, biofouling, and protective coatings.
Download or read book Introduction to Soft Matter written by Ian W. Hamley and published by John Wiley & Sons. This book was released on 2013-03-18 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an introduction to this exciting and relativelynew subject with chapters covering natural and synthetic polymers,colloids, surfactants and liquid crystals highlighting the many andvaried applications of these materials. Written by an expert in thefield, this book will be an essential reference for people workingin both industry and academia and will aid in understanding of thisincreasingly popular topic. Contains a new chapter on biological soft matter Newly edited and updated chapters including updated coverageof recent aspects of polymer science. Contain problems at the end of each chapter to facilitateunderstanding
Download or read book Solute solvent Interactions written by Johannes Francois Coetzee and published by . This book was released on 1969 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymeric and Self Assembled Hydrogels written by Xian Jun Loh and published by Royal Society of Chemistry. This book was released on 2013 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only book to give a complete picture of current hydrogel research, covering all the major applications as well as the fundamental principles behind them.
