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Author: Jiri Jonas Publisher: Springer Science & Business Media ISBN: 3642759262 Category : Science Languages : en Pages : 272
Book Description
In recent years, there has been a major expansion of high pressure research providing unique information about systems of interest to a wide range of scientific disciplines. Since nuclear magnetic resonance has been applied to a wide spec trum of problems in chemistry, physics and biochemistry, it is not surprising to find that high pressure NMR techniques have also had many applications in these fields of science. Clearly, the high information content of NMR experiments combined with high pressure provides a powerful tool in modern chem istry. It is the aim of this monograph, in the series on NMR Basic Principles and Progress, to illustrate the wide range of prob lems which can be successfully studied by high pressure NMR. Indeed, the various contributions in this volume discuss studies of interest to physics, chemical physics, biochemistry, and chemical reaction kinetics. In many different ways, this monograph demonstrates the power of modern experimental and theoretical techniques to investigate very complex systems. The first contribution, by D. Brinkman, deals with NMR and NQR studies of superionic conductors and high-Tc supercon ductors at high pressure. Pressure effects on phase transitions, detection of new phases, and pressure effects on diffusion and spin-lattice relaxation, represent a few of the topics discussed in this contribution of particular interest to solid state physics.
Author: Jiri Jonas Publisher: Springer Science & Business Media ISBN: 3642759262 Category : Science Languages : en Pages : 272
Book Description
In recent years, there has been a major expansion of high pressure research providing unique information about systems of interest to a wide range of scientific disciplines. Since nuclear magnetic resonance has been applied to a wide spec trum of problems in chemistry, physics and biochemistry, it is not surprising to find that high pressure NMR techniques have also had many applications in these fields of science. Clearly, the high information content of NMR experiments combined with high pressure provides a powerful tool in modern chem istry. It is the aim of this monograph, in the series on NMR Basic Principles and Progress, to illustrate the wide range of prob lems which can be successfully studied by high pressure NMR. Indeed, the various contributions in this volume discuss studies of interest to physics, chemical physics, biochemistry, and chemical reaction kinetics. In many different ways, this monograph demonstrates the power of modern experimental and theoretical techniques to investigate very complex systems. The first contribution, by D. Brinkman, deals with NMR and NQR studies of superionic conductors and high-Tc supercon ductors at high pressure. Pressure effects on phase transitions, detection of new phases, and pressure effects on diffusion and spin-lattice relaxation, represent a few of the topics discussed in this contribution of particular interest to solid state physics.
Author: J. W. Akitt Publisher: Springer Verlag ISBN: 9780387529387 Category : Science Languages : en Pages : 263
Book Description
Six studies review the wide range of problems that can be addressed by high-pressure nuclear magnetic resonance in such fields as physics, chemical physics, biochemistry, and chemical reaction kinetics. They report on investigations of motion and phase transitions in molecular systems, the dynamics in liquids and complex systems, water and aqueous solutions, chemical kinetics, and the pressure effects on molecular conformation and structure. No subject index. Annotation copyrighted by Book News, Inc., Portland, OR
Author: The Nuclear Magnetic Resonance Society of Japan Publisher: Springer ISBN: 9811059667 Category : Science Languages : en Pages : 634
Book Description
This book describes the advanced developments in methodology and applications of NMR spectroscopy to life science and materials science. Experts who are leaders in the development of new methods and applications of life and material sciences have contributed an exciting range of topics that cover recent advances in structural determination of biological and material molecules, dynamic aspects of biological and material molecules, and development of novel NMR techniques, including resolution and sensitivity enhancement. First, this book particularly emphasizes the experimental details for new researchers to use NMR spectroscopy and pick up the potentials of NMR spectroscopy. Second, the book is designed for those who are involved in either developing the technique or expanding the NMR application fields by applying them to specific samples. Third, the Nuclear Magnetic Resonance Society of Japan has organized this book not only for NMR members of Japan but also for readers worldwide who are interested in using NMR spectroscopy extensively.
Author: Daniel Abram Driscoll Publisher: ISBN: Category : Languages : en Pages : 346
Book Description
The effects of pressure, up to 5 kbar, on phospholipid vesicles were measured using high pressure NMR techniques. Specifically, two sets of experiments were performed. First, sonicated vesicles of 1-palmitoyl-2-oleyl-3-sn-phosphatidyl-choline at 28$spcirc$C were studied using two-dimensional phase sensitive NOESY as an indicator of cross-relaxation in the bilayer. Results indicated a dramatic buildup of cross-peak intensity with pressure. A qualitative explanation of the results, using a well-known model of cross-relaxation in the lipid bilayer, was that high pressure causes an increase in the order parameter throughout the acyl chains, directly increasing the measured cross-relaxation rate and steady-state value of the NOE. The second set of experiments were done on multilamellar vesicles of tail-perdeuterated dipalmitoyl phosphatidylcholine, using high pressure deuterium MMR as a probe of the order in this system as pressure was varied at several different temperatures. Measurements were taken both in the liquid-crystalline and gel states of pure lipid bilayers. Effects and reversal of action of the local anesthetic tetracaine were studied. The results showed that the order parameters of all segments of the chain were increased with pressure. The addition of tetracaine disordered the chain, and this effect was shown to be reversed by pressure by both changes in lineshape and the measured order parameters. The application of pressure in the gel state had the same effect as lowering the temperature, in that the gel state lineshape slowly changed from a motionally averaged to a rigid lattice type spectrum as pressure was increased. At very high pressures, even the methyl portion of the spectrum indicated no motion on the MMR timescale. A phase which corresponded to an interdigitated gel was observed, and a general phase diagram constructed.
Author: Shantha Dharmapriya Samarasinghe Publisher: ISBN: Category : Languages : en Pages : 230
Book Description
Dipalmitoylphosphatidylcholine/cholesterol bilayer membranes were studied using $\sp2$H and $\sp{31}$P NMR spectroscopy over the pressure range from 1 bar to 5 kbar. The phase diagram was constructed, structure and dynamics of the bilayers were examined. The pressure dependence of the dynamic and conformational characteristics were studied using $\sp{31}$P NMR spectroscopy at 50$\sp\circ$C over the pressure range from 1 bar to 5 kbar. Cholesterol is able to maintain the mobility of the head groups despite the ordering of hydrocarbon chains in clear contrast to the same in pure DPPC bilayers where large changes in the head group motion was evident. Limited interdigitation of the chain region was evident in the presence of 20 mol% cholesterol. The spin lattice relaxation times cross over from fast to slow correlation time regime with the main phase transition from the liquid crystal to gel phase.
Author: Jiri Jonas
Author: Jiri Jonas
Author: Jiri Jonas
Author: J. W. Akitt
Author: Andrzej Stefan Kulik
Author: The Nuclear Magnetic Resonance Society of Japan
Author: Charalampos Marinos
Author: Daniel Abram Driscoll
Author: Dennis Lloyd Hasha
Author: 
Author: Shantha Dharmapriya Samarasinghe