Download or read book Visualization of Hydrogen Bond Dynamics written by Takashi Kumagai and published by Springer Science & Business Media. This book was released on 2012-09-02 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hydrogen bond represents an important interaction between molecules, and the dynamics of hydrogen bonds in water create an ever-present question associated with the process of chemical and biological reactions. In spite of numerous studies, the process remains poorly understood at the microscopic level because hydrogen-bond dynamics, such as bond rearrangements and hydrogen/proton transfer reactions, are extremely difficult to probe. Those studies have been carried out by means of spectroscopic methods where the signal stems from the ensemble of a system and the hydrogen-bond dynamics were inferred indirectly. This book addresses the direct imaging of hydrogen-bond dynamics within water-based model systems assembled on a metal surface, using a scanning tunneling microscope (STM). The dynamics of individual hydrogen bonds in water clusters, hydroxyl clusters, and water-hydroxyl complexes are investigated in conjunction with density functional theory. In these model systems, quantum dynamics of hydrogen bonds, such as tunneling and zero-point nuclear motion, are observed in real space. Most notably, hydrogen atom relay reactions, which are frequently invoked across many fields of chemistry, are visualized and controlled by STM. This work presents a means of studying hydrogen-bond dynamics at the single-molecule level, providing an important contribution to wide fields beyond surface chemistry.
Download or read book Hydrogen Bond Networks written by M.C. Bellissent-Funel and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: The almost universal presence of water in our everyday lives and the very `common' nature of its presence and properties possibly deflects attention from the fact that it has a number of very unusual characteristics which, furthermore, are found to be extremely sensitive to physical parameters, chemical environment and other influences. Hydrogen-bonding effects, too, are not restricted to water, so it is necessary to investigate other systems as well, in order to understand the characteristics in a wider context. Hydrogen Bond Networks reflects the diversity and relevance of water in subjects ranging from the fundamentals of condensed matter physics, through aspects of chemical reactivity to structure and function in biological systems.
Download or read book Ultrafast Hydrogen Bonding Dynamics and Proton Transfer Processes in the Condensed Phase written by Thomas Elsaesser and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen bonds represent type of molecular interaction that determines the structure and function of a large variety of molecular systems. The elementary dynamics of hydrogen bonds and related proton transfer reactions, both occurring in the ultra fast time domain between 10-14 and 10-11s, form a research topic of high current interest. In this book addressing scientists and graduate students in physics, chemistry and biology, the ultra fast dynamics of hydrogen bonds and proton transfer in the condensed phase are reviewed by leading scientists, documenting the state of the art in this exciting field from the viewpoint of theory and experiment. The nonequilibrium behavior of hydrogen-bonded liquids and intramolecular hydrogen bonds as well as photo induced hydrogen and proton transfer are covered in 7 chapters, making reference to the most recent literature.
Download or read book Hydrogen Bonding written by Steve Scheiner and published by Topics in Physical Chemistry. This book was released on 1997 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the importance of the hydrogen bond, there have been scores of insights gained about its fundamental nature by quantum chemical computations over the years. Such methods can probe subtle characteristics of the electronic structure and examine regions of the potential energy surface that are simply not accessible by experimental means. The maturation of the techniques, codes, and computer hardware have permitted calculations of unprecedented reliability and rivaling the accuracy of experimental data. This book strives first toward an appreciation of the power of quantum chemistry to analyze the deepest roots of the hydrogen bond phenomenon. It offers a systematic and understandable account of decades of such calculations, focusing on the most important findings. This book provides readers with the tools to understand the original literature, and to perhaps carry out some calculations of their very own on systems of interest.
Download or read book The Nature of the Hydrogen Bond written by Gastone Gilli and published by Oxford University Press. This book was released on 2009-06-25 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book defines, for the first time, the rules for predicting H-bond energies and geometries from the properties of the interacting molecules. This new knowledge is used to investigate the molecular mechanisms in systems relevant to chemistry, biochemistry, pharmacology, crystallography, and material sciences.
Download or read book Dynamics of Nanoscopic Hydrogen Bonding Systems Probed Using Ultrafast Nonlinear Infrared Spectroscopy written by Ivan Ratko Piletic and published by . This book was released on 2006 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Visualization of General Relativistic Tensor Fields Via a Fiber Bundle Data Model written by Werner Benger and published by . This book was released on 2005 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pharmaceutical Biotechnology written by Adalberto Pessoa and published by CRC Press. This book was released on 2021-07-16 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pharmaceutical Biotechnology: A Focus on Industrial Application covers the development of new biopharmaceuticals as well as the improvement of those being produced. The main purpose is to provide background and concepts related to pharmaceutical biotechnology, together with an industrial perspective. This is a comprehensive text for undergraduates, graduates and academics in biochemistry, pharmacology and biopharmaceutics, as well as professionals working on the interdisciplinary field of pharmaceutical biotechnology. Written with educators in mind, this book provides teachers with background material to enhance their classes and offers students and other readers an easy-to-read text that examines the step-by-step stages of the development of new biopharmaceuticals. Features: Discusses specific points of great current relevance in relation to new processes as well as traditional processes Addresses the main unitary operations used in the biopharmaceutical industry such as upstream and downstream Includes chapters that allow a broad evaluation of the production process Dr. Adalberto Pessoa Jr. is Full Professor at the School of Pharmaceutical Sciences of the University of São Paulo and Visiting Senior Professor at King’s College London. He has experience in enzyme and fermentation technology and in the purification processes of biotechnological products such as liquid–liquid extraction, cross-flow filtration and chromatography of interest to the pharmaceutical and food industries. Dr. Michele Vitolo is Full Professor at the School of Pharmaceutical Sciences of the University of São Paulo. He has experience in enzyme technology, in immobilization techniques (aiming the reuse of the biocatalyst) and in the operation of membrane reactors for obtaining biotechnological products of interest to the pharmaceutical, chemical and food industries. Dr. Paul F. Long is Professor of Biotechnology at King's College London and Visiting International Research Professor at the University of São Paulo. He is a microbiologist by training and his research uses a combination of bioinformatics, laboratory and field studies to discover new medicines from nature, particularly from the marine environment.
Download or read book The Hydrogen Bond written by George C. Pimentel and published by . This book was released on 1960 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding and Modelling Hydrogen Bonding in Liquid Water written by Revati Kumar and published by . This book was released on 2007 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrogen Bonding by C H Groups written by Robert D. Green and published by London : Macmillan. This book was released on 1974 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gulliver in the Country of Lilliput written by Ilya G. Shenderovich and published by MDPI. This book was released on 2021-03-30 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noncovalent interactions are the bridge between ideal gas abstraction and the real world. For a long time, they were covered by two terms: van der Waals interactions and hydrogen bonding. Both experimental and quantum chemical studies have contributed to our understanding of the nature of these interactions. In the last decade, great progress has been made in identifying, quantifying, and visualizing noncovalent interactions. New types of interactions have been classified—their energetic and spatial properties have been tabulated. In the past, most studies were limited to analyzing the single strongest interaction in the molecular system under consideration, which is responsible for the most important structural properties of the system. Despite this limitation, such an approach often results in satisfactory approximations of experimental data. However, this requires knowledge of the structure of the molecular system and the absence of other competing interactions. The current challenge is to go beyond this limitation. This Special Issue collects ideas on how to study the interplay of noncovalent interactions in complex molecular systems including the effects of cooperation and anti-cooperation, solvation, reaction field, steric hindrance, intermolecular dynamics, and other weak but numerous impacts on molecular conformation, chemical reactivity, and condensed matter structure.
Download or read book Hydrogen Bonding New Insights written by Slawomir Grabowski and published by Springer Science & Business Media. This book was released on 2006-10-07 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book uses examples from experimental studies to illustrate theoretical investigations, allowing greater understanding of hydrogen bonding phenomena. The most important topics in recent studies are covered. This volume is an invaluable resource that will be of particular interest to physical and theoretical chemists, spectroscopists, crystallographers and those involved with chemical physics.
Download or read book Vibrational Dynamics of the Hydrogen Bond written by Simon A. Barton and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A general treatment of non-harmonic vibrational dynamics in an isolated hydrogen bond is presented, based on an adiabatic mode separation of hydrogenic motions from those of the heavier particles. The validity of the Stepanov (adiabatic) approximation is examined by including correct non-adiabatic couplings and solving the resultant coupled eigenvalue problem for a model system (HF 2 -) in which the couplings are expected to have a maximum intrinsic strength. Convergence is demonstrated by including up to three coupled protonic states. Comparison with exact results thus obtained shows that the adiabatic approximation gives transition frequencies within 1%, and infrared relative intensities to about 10% - in cases where the coupled protonic levels are not degenerate. Cases of isolated strong coupling, arising from accidental or systematic degeneracies of proton levels, can be accommodated in the theory in a direct way, but do not arise for HF 2 -. Calculations on the HF 2 - system are based entirely on the ab initio potential energy surface of Alml^f (Ref. 24), but employ a model form with correct dissociation properties. The close agreement of computed and observed transition frequencies, and IR relative intensities, leads to a convinc ing assignment (in the adiabatic mode description) for nearly all transitions in the bifluoride spectrum (e.g. in KHF 2 (s)), on the basis of an isolated ion model.
Download or read book Label Free Super Resolution Microscopy written by Vasily Astratov and published by Springer Nature. This book was released on 2019-08-31 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the advances in super-resolution microscopy in physics and biomedical optics for nanoscale imaging. In the last decade, super-resolved fluorescence imaging has opened new horizons in improving the resolution of optical microscopes far beyond the classical diffraction limit, leading to the Nobel Prize in Chemistry in 2014. This book represents the first comprehensive review of a different type of super-resolved microscopy, which does not rely on using fluorescent markers. Such label-free super-resolution microscopy enables potentially even broader applications in life sciences and nanoscale imaging, but is much more challenging and it is based on different physical concepts and approaches. A unique feature of this book is that it combines insights into mechanisms of label-free super-resolution with a vast range of applications from fast imaging of living cells to inorganic nanostructures. This book can be used by researchers in biological and medical physics. Due to its logically organizational structure, it can be also used as a teaching tool in graduate and upper-division undergraduate-level courses devoted to super-resolved microscopy, nanoscale imaging, microscopy instrumentation, and biomedical imaging.
Download or read book Advanced Organic Chemistry of Nucleic Acids written by Zoe A. Shabarova and published by John Wiley & Sons. This book was released on 2008-07-11 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sequencing, cloning, transcription - these are but a few key techniques behind the current breathtaking advances in molecular biology and biochemistry. As these methods continuosly diversify, biochemists need a sound chemical understanding to keep the pace. Chemists beginning working in the molecular biology lab need an introduction to this field from their point of view. This book serves both: it describes most of the known chemical reactions of nucleosides, nucleotides, and nucleic acids in sufficient detail to provide the desired background, and additionally, the fundamental relations between sequence, structure and functionality of nucleic acids are presented. The first edition of this book, which was published in Russian, has immediately become a recognized standard reference. This second, thoroughly revised and updated edition, now published in English, is likely to achieve a similar position in the international scientific community.
Download or read book Neutron Protein Crystallography written by Nobuo Niimura and published by Oxford University Press. This book was released on 2011-02-17 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the first books dedicated to the emerging field of neutron protein crystallography (NPC). It covers all of the practical aspects of NPC and demonstrates how NPC can explore protein features such as hydrogen bonds, protonation and deprotonation of amino acid residues, and hydration structures.
