Ionic Hydration In Chemistry And Biophysics

Covers the fundamental principles of solute partitioning in aqueous two-phase systems, explains their important practical features, and furnishes methods of characterization. The information provided by the partition behaviour of a solute in an aqueous two-phase system is examined.

Over the past decade, numerous books have attempted to explain ions in aqueous solutions in relation to biophysical phenomena. Ions in Water and Biophysical Implications, from Chaos to Cosmos offers a physicochemical point of view of the spread of this matter and suggests innovative solutions that will challenge the biophysics research establishment. Starting with a throughout discussion of the properties of liquid water, in particular as a structured liquid with an extensive hydrogen bonded structure, the book examines water as a solvent for gases, non-electrolytes, and electrolytes and reviews the properties, sizes and thermodynamics of isolated and aqueous ions, as well as their interactions, including those of polyelectrolytes. The effects of ions on water structure, including those on solvent dynamics and certain thermodynamic quantities, are presented. This volume investigates water surfaces with its vapour, with another liquid, and with a solid, as well as the effects of solutes, including simple ions and the water-miscible non-electrolytes. Surfaces are relevant to biomolecular and colloidal systems and the book discusses briefly surfactants, micelles and vesicles. Finally, the book concludes with a review of the various biophysical implications involving chaotropic and kosmotropic ions in homogeneous solutions and the Hofmeister series for ions concerning biomolecular and colloidal systems and some aspects of protein hydration and K+/Na+ selectivity in ion channels. Ions in Water and Biophysical Implications, from Chaos to Cosmos will appeal to physical chemists, biophysicists, biochemists, as well as to all students and researchers involved in the study of aqueous solutions.

Biophysical Chemistry: Molecules to Membranes is a one-semester textbook for graduate and senior undergraduate students. Developed over several years of teaching, the approach differs from that of other texts by emphasizing thermodynamics of aqueous solutions, by rigorously treating electrostatics and irreversible phenomena, and by applying these principles to topics of biochemistry and biophysics. The main sections are: (1) Basic principles of equilibrium thermodynamics. (2) Structure and behavior of solutions of ions and molecules. The discussions range from properties of bulk water to the solvent structure of solutions of small molecules and macromolecules. (3) Physical principles are extended for the non-homogenous and non-equilibrium nature of biological processes. Areas included are lipid/water systems, transport phenomena, membranes, and bio-electrochemistry. This new textbook will provide an essential foundation for research in cellular physiology, biochemistry, membrane biology, as well as the derived areas bioengineering, pharmacology, nephrology, and many others.

There is no doubt about the importance of hydration in many areas of every day life, technology, biology, medicine, science etc. During the last years many investigations have been carried out upon problems of hydration and a large amount of experimental and theoretical data has been obtained by the application of different methods. One effi cient possibility to stimulate progress in scientific problems is to come together and discuss existing results and ideas. This was the aim of the 35th Bunsenkolloquium and a subsequent seminar held in Marburg, FRG from April 2 -4, 1987 with respect to the "Interaction of Water in Ionic and Nonionic Hydrates". The meeting was attended by more than one hundred participants from 25 countries. It will be seen from the content of the chapters in this book, which comprises the introductory papers and more or less extended abstracts of research seminars, that it was possible not only to stress the advantages and disadvantages of each method, but also to show how information gained by one method can complement the results of another one in order to increase our overall understanding of hydration pheno mena. The papers are divided into sections concerning the hydration of: ions, nonionic substances, biological and macromolecular substances, surfactants as well as a section containing methods, models and theo ries, which may stimulate investigations on hydrations.

There is no doubt about the importance of hydration in many areas of technology, biology, medicine, science, etc. During the last years many investigations have been carried out on problems of hydration and a large amount of experimental and theoretical data has been obtained from the application of different methods. The papers presented at the symposium Interactions of Water in Ionic and Nonionic Hydrates (Marburg/FRG, 2.-3.4.1987) are divided into sections concerning the hydration of: ions, nonionic substances, biological and macromolecular substances, and surfactants. There is also a section containing methods, models and theories, which may stimulate investigations on hydrations. The success of the meeting may be due to the very different fields of interest of the participants. Thus this volume is a snapshot of the course of research in the large area of hydration. It is hoped that not only readers who are active in the research of interactions of water but also those who are involved in another scientific field and have the impression that hydration may be of importance for the interpretation of their results, will profit from this book.