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Interfacial Structure Of Phospholipids Probed By High Resolution High Repetition Rate Broadband Vibrational Sum Frequency Generation Spectroscopy
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Book Synopsis Interfacial Structure of Phospholipids Probed by High-resolution, High-repetition-rate Broadband Vibrational Sum-frequency Generation Spectroscopy by : Freeda Yesudas
Download or read book Interfacial Structure of Phospholipids Probed by High-resolution, High-repetition-rate Broadband Vibrational Sum-frequency Generation Spectroscopy written by Freeda Yesudas and published by . This book was released on 2022* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultrafast Dynamics of Phospholipid-Water Interfaces by : René Costard
Download or read book Ultrafast Dynamics of Phospholipid-Water Interfaces written by René Costard and published by Springer. This book was released on 2015-08-08 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a highly innovative study of the ultrafast structural and vibrational dynamics of hydrated phospholipids, the basic constituents of cell membranes. As a novel approach to the water-phospholipid interface, the author studies phosphate vibrations using the most advanced methods of nonlinear vibrational spectroscopy, including femtosecond two-dimensional infrared spectroscopy. He shows for the first time that the structure of interfacial water undergoes very limited fluctuations on a 300 fs time scale and that the lifetimes of hydrogen bonds with the phospholipid are typically longer than 10 ps. Such properties originate from the steric hindrance of water fluctuations at the interface and the orienting action of strong electric fields from the phospholipid head group dipoles. In an extensive series of additional experiments, the vibrational lifetimes of the different vibrations and the processes of energy dissipation are elucidated in detail.
Book Synopsis Probing Interfacial Water Structure Next to Lipid Membranes Using Vibrational Sum Frequency Spectroscopy by : Saranya Pullanchery Sankara Narayanan
Download or read book Probing Interfacial Water Structure Next to Lipid Membranes Using Vibrational Sum Frequency Spectroscopy written by Saranya Pullanchery Sankara Narayanan and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Phospholipids are one of the major structural components of biological membranes. The hydrophilic headgroups of lipid molecules interact with the adjacent interfacial water molecules. The hydrogen bonding structure of interfacial water is determined by the chemical structure of the lipid headgroups themselves. Moreover, the first few molecular layers of interfacial water mediate all the chemical interactions at the membrane/water interface. Herein, the changes in interfacial water structure associated with lipid-lipid and ion-lipid interactions next to various zwitterionic and charged lipid membranes are investigated. In the first part of the dissertation, the interfacial water structure and phosphate group hydration of 1,2-dioleoyl-sn-glycero-3-phosphatidylcholine (DOPC) monolayers at air/water interfaces are described. Both vibrational sum frequency spectroscopy (VSFS) and Langmuir monolayer compression measurements were made. The PC lipids oriented water molecules predominantly through their phosphate-choline (P-N) dipoles and carbonyl moieties. Upon the introduction of low concentrations of 1,2 dioleoyl-3-trimethylammonium propane (DOTAP), a positively charged double chain surfactant, the TAP headgroups were attracted to the phosphate moieties on adjacent PC lipids. This attraction caused the monolayers to contract, expelling water molecules that were hydrogen bonded to the phosphate groups. Moreover, amplitude of the OH stretch signal decreased. At higher DOTAP concentrations, the positive charge on the monolayer caused an increase in the area per headgroup and water molecules in the near-surface bulk region became increasingly aligned. Under these latter conditions, the OH stretch amplitude was linearly proportional to the surface potential. By contrast, introducing 1,2-dioleoyl-sn-glycero-3-phosphatidylglycerol (DOPG), a negatively charged lipid, did not change the area per lipid or the phosphate-water hydrogen bonding network. As the interfacial potential grew more negative, the OH stretch amplitude increased continuously. Significantly, changes in the interfacial water spectrum were independent of the chemistry employed to create the positive or negative interfacial potential. For example, Ca2+ and tetracaine (both positively charged) disrupted the water structure similarly to low DOTAP concentrations, while SCN- and ibuprofen (both negatively charged) enhanced the water structure. The changes in interfacial water peaks as a function of increasing surface potential were deconvoluted into changes in directly bound water molecules and water molecules ordered by the electric field. At high surface potential values, the water molecules ordered by the electric field were found to dominate the VSFS signal changes. In a second set of experiments, the effect of inverting the P-N dipole on the interfacial water ordering was studied using VSFS. The inverted headgroup dipole was found to order less water molecules compared to PC headgroups. The second part of this dissertation describes various ion-lipid interactions and the associated changes in interfacial water structure. Using a combination of fluorescence imaging, surface pressure-area isotherms and VSFS, the differences between the interaction of Cu2+, Ca2+, Mg2+ and Zn2+ ions with the PS headgroup were characterized. Cu2+ ions bound to two PS lipids without attenuating the surface charge, whereas Ca2+, Mg2+ and Zn2+ ions neutralized the negative charge on the headgroups. Zn2+ and Ca2+ ions induced three-dimensional bleb formation in PS lipid bilayers because of their ability to form contact ion pairs with the PS headgroup moieties and to reduce the headgroup area dramatically. The molecular details of phase changes within a PS lipid monolayer induced by Zn2+ were further characterized in detail using VSFS. Zn2+ ions were found to dehydrate the PS lipid headgroups and rigidify the lipid alkyl tails. The changes in interfacial water structure next to PS lipid monolayers were utilized to determine the dissociation constant for Zn2+-PS interactions. The approach developed in this dissertation to interpret interfacial water signal changes during ion-lipid and lipid-lipid interactions can potentially be useful for future nonlinear optical experiments.
Book Synopsis Ultrafast Dynamics of Phospholipid-Water Interfaces by : René Costard
Download or read book Ultrafast Dynamics of Phospholipid-Water Interfaces written by René Costard and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a highly innovative study of the ultrafast structural and vibrational dynamics of hydrated phospholipids, the basic constituents of cell membranes. As a novel approach to the water-phospholipid interface, the author studies phosphate vibrations using the most advanced methods of nonlinear vibrational spectroscopy, including femtosecond two-dimensional infrared spectroscopy. He shows for the first time that the structure of interfacial water undergoes very limited fluctuations on a 300 fs time scale and that the lifetimes of hydrogen bonds with the phospholipid are typically longer than 10 ps. Such properties originate from the steric hindrance of water fluctuations at the interface and the orienting action of strong electric fields from the phospholipid head group dipoles. In an extensive series of additional experiments, the vibrational lifetimes of the different vibrations and the processes of energy dissipation are elucidated in detail.
Book Synopsis Phospholipids Handbook by : Gregor Cevc
Download or read book Phospholipids Handbook written by Gregor Cevc and published by CRC Press. This book was released on 1993-08-02 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Employing a multidisciplinary approach to phospholipid research, this work catalogues the current knowledge of this class of molecules and details the general, chemical, physical and structural properties of phospholipid monolayers and bilayers. Phospholipid applications are also covered.
Book Synopsis Molecular Structure and Ordering of Phospholipids at a Liquid-Liquid Interface by : R. Walker
Download or read book Molecular Structure and Ordering of Phospholipids at a Liquid-Liquid Interface written by R. Walker and published by . This book was released on 1998 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vibrational sum frequency spectroscopy in conjunction with interfacial pressure measurements provide direct information about the molecular structure of phosphocholine monolayers adsorbed to the interface between D2O and carbon tetrachloride. Monolayers form from breakup at the interface of aqueous phase phosphocholine vesicles. For the saturated, symmetric, dialkyl phosphocholines used in this study, alkyl chain conformation as inferred from the relative intensity of CH stretch vibrational bands depends on both alkyl chain length and interfacial concentration. Temperature controlled experiments show the lipid bilayer gel to liquid crystalline phase transition temperature to play a pivotal role in determining interfacial coverage and alkyl chain structure. At equivalent interfacial coverages, longer chain phosphocholine species form more disordered monolayers than shorter chain phosphocholines.
Book Synopsis Visualizing Chemistry by : National Research Council
Download or read book Visualizing Chemistry written by National Research Council and published by National Academies Press. This book was released on 2006-06-01 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists and engineers have long relied on the power of imaging techniques to help see objects invisible to the naked eye, and thus, to advance scientific knowledge. These experts are constantly pushing the limits of technology in pursuit of chemical imagingâ€"the ability to visualize molecular structures and chemical composition in time and space as actual events unfoldâ€"from the smallest dimension of a biological system to the widest expanse of a distant galaxy. Chemical imaging has a variety of applications for almost every facet of our daily lives, ranging from medical diagnosis and treatment to the study and design of material properties in new products. In addition to highlighting advances in chemical imaging that could have the greatest impact on critical problems in science and technology, Visualizing Chemistry reviews the current state of chemical imaging technology, identifies promising future developments and their applications, and suggests a research and educational agenda to enable breakthrough improvements.
Book Synopsis Fundamentals of Sum-Frequency Spectroscopy by : Y. R. Shen
Download or read book Fundamentals of Sum-Frequency Spectroscopy written by Y. R. Shen and published by Cambridge University Press. This book was released on 2016-02-18 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book on the topic, and written by the founder of the technique, this comprehensive resource provides a detailed overview of sum-frequency spectroscopy, its fundamental principles, and the wide range of applications for surfaces, interfaces, and bulk. Beginning with an overview of the historical context, and introductions to the basic theory of nonlinear optics and surface sum-frequency generation, topics covered include discussion of different experimental arrangements adopted by researchers, notes on proper data analysis, an up-to-date survey commenting on the wide range of successful applications of the tool, and a valuable insight into current unsolved problems and potential areas to be explored in the future. With the addition of chapter appendices that offer the opportunity for more in-depth theoretical discussion, this is an essential resource that integrates all aspects of the subject and is ideal for anyone using, or interested in using, sum-frequency spectroscopy.
Book Synopsis Chiroptical Spectroscopy by : Prasad L. Polavarapu
Download or read book Chiroptical Spectroscopy written by Prasad L. Polavarapu and published by CRC Press. This book was released on 2016-10-03 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book details chiroptical spectroscopic methods: electronic circular dichroism (ECD), optical rotatory dispersion (ORD), vibrational circular dichroism (VCD), and vibrational Raman optical activity (VROA). For each technique, the text presents experimental methods for measurements and theoretical methods for analyzing the experimental data. It also includes a set of experiments that can be adopted for undergraduate teaching laboratories. Each chapter is written in an easy-to-follow format for novice readers, with necessary theoretical formalism in appendices for advanced readers.
Author :The Nuclear Magnetic Resonance Society of Japan Publisher :Springer ISBN 13 :9811059667 Total Pages :634 pages Book Rating :4.8/5 (11 download)
Book Synopsis Experimental Approaches of NMR Spectroscopy by : The Nuclear Magnetic Resonance Society of Japan
Download or read book Experimental Approaches of NMR Spectroscopy written by The Nuclear Magnetic Resonance Society of Japan and published by Springer. This book was released on 2017-11-23 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Stimulated Raman Scattering Microscopy by : Ji-Xin Cheng
Download or read book Stimulated Raman Scattering Microscopy written by Ji-Xin Cheng and published by Elsevier. This book was released on 2021-12-04 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Raman Scattering Microscopy: Techniques and Applications describes innovations in instrumentation, data science, chemical probe development, and various applications enabled by a state-of-the-art stimulated Raman scattering (SRS) microscope. Beginning by introducing the history of SRS, this book is composed of seven parts in depth including instrumentation strategies that have pushed the physical limits of SRS microscopy, vibrational probes (which increased the SRS imaging functionality), data science methods, and recent efforts in miniaturization. This rapidly growing field needs a comprehensive resource that brings together the current knowledge on the topic, and this book does just that. Researchers who need to know the requirements for all aspects of the instrumentation as well as the requirements of different imaging applications (such as different types of biological tissue) will benefit enormously from the examples of successful demonstrations of SRS imaging in the book. Led by Editor-in-Chief Ji-Xin Cheng, a pioneer in coherent Raman scattering microscopy, the editorial team has brought together various experts on each aspect of SRS imaging from around the world to provide an authoritative guide to this increasingly important imaging technique. This book is a comprehensive reference for researchers, faculty, postdoctoral researchers, and engineers. Includes every aspect from theoretic reviews of SRS spectroscopy to innovations in instrumentation and current applications of SRS microscopy Provides copious visual elements that illustrate key information, such as SRS images of various biological samples and instrument diagrams and schematics Edited by leading experts of SRS microscopy, with each chapter written by experts in their given topics
Book Synopsis High Resolution Imaging in Microscopy and Ophthalmology by : Josef F. Bille
Download or read book High Resolution Imaging in Microscopy and Ophthalmology written by Josef F. Bille and published by Springer. This book was released on 2019-08-13 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book provides a comprehensive overview of the application of the newest laser and microscope/ophthalmoscope technology in the field of high resolution imaging in microscopy and ophthalmology. Starting by describing High-Resolution 3D Light Microscopy with STED and RESOLFT, the book goes on to cover retinal and anterior segment imaging and image-guided treatment and also discusses the development of adaptive optics in vision science and ophthalmology. Using an interdisciplinary approach, the reader will learn about the latest developments and most up to date technology in the field and how these translate to a medical setting. High Resolution Imaging in Microscopy and Ophthalmology – New Frontiers in Biomedical Optics has been written by leading experts in the field and offers insights on engineering, biology, and medicine, thus being a valuable addition for scientists, engineers, and clinicians with technical and medical interest who would like to understand the equipment, the applications and the medical/biological background. Lastly, this book is dedicated to the memory of Dr. Gerhard Zinser, co-founder of Heidelberg Engineering GmbH, a scientist, a husband, a brother, a colleague, and a friend.
Book Synopsis Coherent Raman Scattering Microscopy by : Ji-Xin Cheng
Download or read book Coherent Raman Scattering Microscopy written by Ji-Xin Cheng and published by CRC Press. This book was released on 2016-04-19 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: The First Book on CRS MicroscopyCompared to conventional Raman microscopy, coherent Raman scattering (CRS) allows label-free imaging of living cells and tissues at video rate by enhancing the weak Raman signal through nonlinear excitation. Edited by pioneers in the field and with contributions from a distinguished team of experts, Coherent Raman Sc
Book Synopsis Principles of Fluorescence Spectroscopy by : Joseph R. Lakowicz
Download or read book Principles of Fluorescence Spectroscopy written by Joseph R. Lakowicz and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorescence methods are being used increasingly in biochemical, medical, and chemical research. This is because of the inherent sensitivity of this technique. and the favorable time scale of the phenomenon of fluorescence. 8 Fluorescence emission occurs about 10- sec (10 nsec) after light absorp tion. During this period of time a wide range of molecular processes can occur, and these can effect the spectral characteristics of the fluorescent compound. This combination of sensitivity and a favorable time scale allows fluorescence methods to be generally useful for studies of proteins and membranes and their interactions with other macromolecules. This book describes the fundamental aspects of fluorescence. and the biochemical applications of this methodology. Each chapter starts with the -theoreticalbasis of each phenomenon of fluorescence, followed by examples which illustrate the use of the phenomenon in the study of biochemical problems. The book contains numerous figures. It is felt that such graphical presentations contribute to pleasurable reading and increased understand ing. Separate chapters are devoted to fluorescence polarization, lifetimes, quenching, energy transfer, solvent effects, and excited state reactions. To enhance the usefulness of this work as a textbook, problems are included which illustrate the concepts described in each chapter. Furthermore, a separate chapter is devoted to the instrumentation used in fluorescence spectroscopy. This chapter will be especially valuable for those perform ing or contemplating fluorescence measurements. Such measurements are easily compromised by failure to consider a number of simple principles.
Book Synopsis Confocal Raman Microscopy by : Jan Toporski
Download or read book Confocal Raman Microscopy written by Jan Toporski and published by Springer. This book was released on 2018-03-01 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition provides a cutting-edge overview of physical, technical and scientific aspects related to the widely used analytical method of confocal Raman microscopy. The book includes expanded background information and adds insights into how confocal Raman microscopy, especially 3D Raman imaging, can be integrated with other methods to produce a variety of correlative microscopy combinations. The benefits are then demonstrated and supported by numerous examples from the fields of materials science, 2D materials, the life sciences, pharmaceutical research and development, as well as the geosciences.
Download or read book Carotenoids written by John T. Landrum and published by CRC Press. This book was released on 2009-12-21 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carotenoids are of great interest due to their essential biological functions in both plants and animals. However, the properties and functions of carotenoids in natural systems are surprisingly complex. With an emphasis on the chemical aspects of these compounds, Carotenoids: Physical, Chemical, and Biological Functions and Properties presents a b
Book Synopsis Current Protocols Essential Laboratory Techniques by : Sean R. Gallagher
Download or read book Current Protocols Essential Laboratory Techniques written by Sean R. Gallagher and published by John Wiley & Sons. This book was released on 2012-03-19 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest title from the acclaimed Current Protocols series, Current Protocols Essential Laboratory Techniques, 2e provides the new researcher with the skills and understanding of the fundamental laboratory procedures necessary to run successful experiments, solve problems, and become a productive member of the modern life science laboratory. From covering the basic skills such as measurement, preparation of reagents and use of basic instrumentation to the more advanced techniques such as blotting, chromatography and real-time PCR, this book will serve as a practical reference manual for any life science researcher. Written by a combination of distinguished investigators and outstanding faculty, Current Protocols Essential Laboratory Techniques, 2e is the cornerstone on which the beginning scientist can develop the skills for a successful research career.
